extends Node2D

const SCREEN := Vector2(1600.0, 900.0)
const WORLD_SCALE := 1.0
const WORLD_SIZE := SCREEN
const SAVE_PATH := "user://void_bastion_save.json"
const MAX_WAVES := 15
const BOSS_WAVE_INTERVAL := 5
const PLAYFIELD_TOP := 92.0
const PLAYFIELD_BOTTOM := 758.0
const GRID_SIZE := 80.0
const TOWER_TEXTURE := preload("res://assets/defense_towers.png")
const PLASMA_TEXTURE := preload("res://assets/tower_plasma.png")
const EMP_TEXTURE := preload("res://assets/tower_emp.png")
const RAILGUN_TEXTURE := preload("res://assets/tower_railgun.png")
const ENEMY_TEXTURE := preload("res://assets/enemy_ships.png")
const ENEMY_INTERCEPTOR_TEXTURE := preload("res://assets/enemy_interceptor.png")
const ENEMY_SHIELD_CARRIER_TEXTURE := preload("res://assets/enemy_shield_carrier.png")
const ENEMY_SIEGE_DESTROYER_TEXTURE := preload("res://assets/enemy_siege_destroyer.png")
const ROAD_STRAIGHT_TEXTURE := preload("res://assets/road_straight.svg")
const ROAD_CORNER_TEXTURE := preload("res://assets/road_corner.svg")
const ROAD_SURFACE_TEXTURE := preload("res://assets/road_surface_material_v1.png")
const ROAD_CORNER_SURFACE_TEXTURE := preload("res://assets/road_corner_surface_v1.png")
const MAP_TEXTURES := [
	preload("res://assets/orbital_platform_grid_base.png"),
	preload("res://assets/orbital_shipyard_grid_base.png"),
	preload("res://assets/asteroid_refinery_grid_base.png"),
	preload("res://assets/orbital_biodome_bg.png"),
	preload("res://assets/cryo_refinery_bg.png"),
	preload("res://assets/solar_forge_bg.png"),
	preload("res://assets/vestige_megastructure_bg.png")
]
const MAP_NAMES := ["BASTION PRIME", "HELIOS-WERFT", "PYRAX-RAFFINERIE", "NOVA-ARKOLOGIE", "CRYO-SCHLEUSE", "SOLARFORGE", "VESTIGE-9"]
const MAP_DESCRIPTIONS := ["Dreifache Feuerlinie", "Langer Werft-Korridor", "Gefährlicher Asteroidenring", "Biodom über dem Nebel", "Eisige Raffinerie", "Schmiede am Gasriesen", "Verlassene Megastruktur"]
const MAP_UNLOCK_COSTS := [0, 0, 0, 24, 32, 40, 48]
const MAP_PATHS := [
	[Vector2(-40, 120), Vector2(1160, 120), Vector2(1160, 360), Vector2(360, 360), Vector2(360, 680), Vector2(1560, 680), Vector2(1560, 520), Vector2(1480, 520), Vector2(1480, 440)],
	[Vector2(-40, 280), Vector2(1320, 280), Vector2(1320, 440), Vector2(280, 440), Vector2(280, 680), Vector2(1560, 680), Vector2(1560, 440), Vector2(1480, 440)],
	[Vector2(-40, 120), Vector2(360, 120), Vector2(360, 600), Vector2(1320, 600), Vector2(1320, 280), Vector2(1480, 280), Vector2(1480, 360)],
	[Vector2(-40, 120), Vector2(1240, 120), Vector2(1240, 280), Vector2(280, 280), Vector2(280, 520), Vector2(1480, 520), Vector2(1480, 440)],
	[Vector2(-40, 680), Vector2(1000, 680), Vector2(1000, 520), Vector2(200, 520), Vector2(200, 360), Vector2(1400, 360), Vector2(1480, 360), Vector2(1480, 440)],
	[Vector2(-40, 120), Vector2(1400, 120), Vector2(1400, 280), Vector2(200, 280), Vector2(200, 600), Vector2(1480, 600), Vector2(1480, 440)],
	[Vector2(-40, 360), Vector2(200, 360), Vector2(200, 120), Vector2(1400, 120), Vector2(1400, 280), Vector2(440, 280), Vector2(440, 600), Vector2(1240, 600), Vector2(1240, 520), Vector2(1480, 520), Vector2(1480, 440)]
]
const MAP_BUILD_ZONES := [
	[Rect2(155, 95, 1380, 660)],
	[Rect2(120, 95, 1380, 660)],
	[Rect2(180, 110, 1270, 645)],
	[Rect2(40, 96, 1520, 664)],
	[Rect2(40, 96, 1520, 664)],
	[Rect2(40, 96, 1520, 664)],
	[Rect2(40, 96, 1520, 664)]
]
const MAP_REACTOR_ZONES := [
	[{"center": Vector2(1480, 440), "radius": 190.0}],
	[{"center": Vector2(1480, 440), "radius": 185.0}],
	[
		{"center": Vector2(1480, 360), "radius": 165.0},
		{"center": Vector2(690, 385), "radius": 155.0}
	],
	[{"center": Vector2(1480, 440), "radius": 185.0}],
	[{"center": Vector2(1480, 440), "radius": 185.0}],
	[{"center": Vector2(1480, 440), "radius": 185.0}],
	[{"center": Vector2(1480, 440), "radius": 185.0}]
]
const COOP_MIRROR_X := 1480.0
const COOP_WORLD_WIDTH := COOP_MIRROR_X * 2.0
const COOP_LEFT_PATH := [Vector2(-40, 120), Vector2(1160, 120), Vector2(1160, 360), Vector2(360, 360), Vector2(360, 680), Vector2(1400, 680), Vector2(1400, 520), Vector2(1480, 520), Vector2(1480, 440)]
const COOP_REACTOR_CENTER := Vector2(COOP_MIRROR_X, 440)
const COOP_REACTOR_RADIUS := 112.0

const DIFFICULTY_DATA := [
	{"name": "LEICHT", "hp": 1.0, "speed": 1.0, "count": 1.0, "income": 1.0, "spawn_delay": 1.0, "start_credits": 450, "lives": 20, "crystals": 5},
	{"name": "MITTEL", "hp": 1.32, "speed": 1.07, "count": 1.24, "income": 0.94, "spawn_delay": 0.91, "start_credits": 430, "lives": 17, "crystals": 7},
	{"name": "SCHWER", "hp": 1.72, "speed": 1.15, "count": 1.48, "income": 0.78, "spawn_delay": 0.82, "start_credits": 340, "lives": 12, "crystals": 12}
]
const DIFFICULTY_DESCRIPTIONS := [
	"Bisheriges Balancing  •  20 Reaktor  •  Kartenbonus 5",
	"+32 % Gegnerhülle  •  +24 % Gegner  •  Kartenbonus 7",
	"+72 % Grundhülle  •  stärkere Spätwellen  •  Start 340  •  Kartenbonus 12"
]

const TOWER_DATA := [
	{"name": "KINETIK", "cost": 120, "damage": 22.0, "range": 190.0, "rate": 0.55, "shot_speed": 620.0, "damage_type": "EINZELZIEL", "color": Color("7de7ff"), "unlock_cost": 0, "description": "Zuverlässiges Projektilgeschütz."},
	{"name": "LASER", "cost": 180, "damage": 12.0, "range": 165.0, "rate": 0.18, "shot_speed": 1100.0, "damage_type": "EINZELZIEL", "color": Color("62fff1"), "unlock_cost": 0, "description": "Schneller Strahl, stark gegen Schilde."},
	{"name": "RAKETE", "cost": 250, "damage": 65.0, "range": 260.0, "rate": 1.40, "shot_speed": 360.0, "damage_type": "FLÄCHE 76", "color": Color("ffb35a"), "unlock_cost": 0, "description": "Explosionsschaden gegen Gruppen."},
	{"name": "PLASMA", "cost": 230, "damage": 48.0, "range": 240.0, "rate": 1.05, "shot_speed": 480.0, "damage_type": "PLASMA-FLÄCHE 92", "color": Color("e27bff"), "unlock_cost": 18, "description": "Plasmaexplosion trifft Gegner im Umkreis."},
	{"name": "EMP-PULS", "cost": 210, "damage": 34.0, "range": 215.0, "rate": 0.92, "shot_speed": 540.0, "damage_type": "EMP-FLÄCHE 118", "color": Color("77e8ff"), "unlock_cost": 24, "description": "Breiter Impuls trifft ganze Gegnergruppen."},
	{"name": "RAILGUN", "cost": 300, "damage": 110.0, "range": 330.0, "rate": 1.85, "shot_speed": 1450.0, "damage_type": "SCHILD-DURCHSCHLAG", "color": Color("87efff"), "unlock_cost": 30, "description": "Weitreichender Schuss, ignoriert Schildschutz."}
]

const ENEMY_DATA := [
	{"name": "JAEGER", "hp": 70.0, "speed": 105.0, "reward": 18, "size": 58.0, "breach_damage": 1, "shield_resistance": 0.28},
	{"name": "FREGATTE", "hp": 185.0, "speed": 72.0, "reward": 34, "size": 78.0, "breach_damage": 2, "shield_resistance": 0.28},
	{"name": "KREUZER", "hp": 520.0, "speed": 43.0, "reward": 78, "size": 112.0, "breach_damage": 3, "shield_resistance": 0.28},
	{"name": "ABFANGJAEGER", "hp": 52.0, "speed": 178.0, "reward": 22, "size": 48.0, "breach_damage": 2, "shield_resistance": 0.28},
	{"name": "SCHILDKREUZER", "hp": 260.0, "speed": 58.0, "reward": 52, "size": 92.0, "breach_damage": 2, "shield_resistance": 0.18, "default_shield": true},
	{"name": "BELAGERER", "hp": 740.0, "speed": 48.0, "reward": 108, "size": 128.0, "breach_damage": 4, "shield_resistance": 0.28}
]

var path_points := PackedVector2Array()
var path_cells: Dictionary = {}
var build_zones: Array[Rect2] = []
var selected_map := 0
var selected_difficulty := 1
var camera_offset := Vector2.ZERO

var game_mode := "menu"
var menu_step := "map"
var store_return_mode := "menu"
var credits := 450
var reactor_lives := 20
var wave := 0
var best_wave := 0
var best_endless_wave := 0
var core_crystals := 0
var unlocked_towers := [0, 1, 2]
var unlocked_maps := [0, 1, 2]
var store_tab := "towers"
var tutorial_completed := false
var tutorial_step := 0
var game_speed := 1.0
const SPEED_OPTIONS := [1.0, 2.0, 3.0, 4.0, 5.0]
var speed_dropdown_open := false
var auto_start_waves := false
var auto_wave_countdown := 0.0
var towers_built_this_run := 0
var cursor_position := Vector2(-1000, -1000)
var cursor_screen_position := Vector2(-1000, -1000)
var selected_tower_type := -1
var selected_tower_index := -1
var pending_touch_build_position := Vector2(-1, -1)
var towers: Array[Dictionary] = []
var enemies: Array[Dictionary] = []
var projectiles: Array[Dictionary] = []
var beams: Array[Dictionary] = []
var particles: Array[Dictionary] = []
var next_enemy_id := 1
var wave_active := false
var enemies_to_spawn := 0
var spawn_timer := 0.0
var status_text := ""
var status_timer := 0.0
var elapsed := 0.0
var endless_mode := false
var mission_reward_granted := false
var last_mission_reward := 0
var victory_reward_pending := false
var coop_mode := false
var coop_ai_mode := false
var coop_online_mode := false
var local_player_slot := 0
var coop_paths: Array[PackedVector2Array] = []
var next_spawn_route := 0

var start_button := Rect2(625, 674, 350, 58)
var map_buttons := [
	Rect2(30, 390, 340, 130), Rect2(430, 390, 340, 130), Rect2(830, 390, 340, 130), Rect2(1230, 390, 340, 130),
	Rect2(255, 540, 340, 130), Rect2(630, 540, 340, 130), Rect2(1005, 540, 340, 130)
]
var difficulty_buttons := [Rect2(535, 520, 165, 50), Rect2(718, 520, 165, 50), Rect2(901, 520, 165, 50)]
var wave_button := Rect2(1320, 18, 255, 54)
var pause_button := Rect2(1242, 18, 62, 54)
var speed_button := Rect2(1170, 18, 62, 54)
var auto_wave_button := Rect2(1320, 73, 255, 22)
var back_button := Rect2(1070, 18, 90, 54)
var tower_buttons := [
	Rect2(15, 768, 255, 122), Rect2(278, 768, 255, 122), Rect2(541, 768, 255, 122),
	Rect2(804, 768, 255, 122), Rect2(1067, 768, 255, 122), Rect2(1330, 768, 255, 122)
]
var upgrade_button := Rect2(1275, 187, 145, 44)
var sell_button := Rect2(1430, 187, 145, 44)
var tutorial_skip_button := Rect2(365, 205, 145, 30)
var reward_ad_button := Rect2(1070, 690, 300, 54)
var tower_info_rect := Rect2(1275, 103, 300, 76)
var endless_button := Rect2(545, 515, 510, 70)
var finish_mission_button := Rect2(625, 610, 350, 62)
var profile_button := Rect2(1280, 25, 270, 52)
var leaderboard_button := Rect2(100, 790, 250, 54)
var shop_button := Rect2(640, 790, 250, 54)
var map_step_back_button := Rect2(55, 320, 170, 50)
var shop_back_button := Rect2(55, 35, 185, 54)
var shop_purchase_buttons := [Rect2(190, 545, 360, 62), Rect2(620, 545, 360, 62), Rect2(1050, 545, 360, 62)]
var map_shop_purchase_buttons := [Rect2(70, 565, 350, 62), Rect2(460, 565, 350, 62), Rect2(850, 565, 350, 62), Rect2(1240, 565, 350, 62)]
var store_tower_tab_button := Rect2(590, 174, 200, 42)
var store_map_tab_button := Rect2(810, 174, 200, 42)
var leaderboard_back_button := Rect2(55, 35, 185, 54)
var leaderboard_mission_button := Rect2(510, 212, 270, 54)
var leaderboard_endless_button := Rect2(820, 212, 270, 54)
var leaderboard_refresh_button := Rect2(1265, 35, 280, 54)
var leaderboard_map_previous_button := Rect2(235, 150, 58, 50)
var leaderboard_map_button := Rect2(303, 150, 410, 50)
var leaderboard_map_next_button := Rect2(723, 150, 58, 50)
var leaderboard_difficulty_previous_button := Rect2(819, 150, 58, 50)
var leaderboard_difficulty_button := Rect2(887, 150, 300, 50)
var leaderboard_difficulty_next_button := Rect2(1197, 150, 58, 50)
var leaderboard_rows: Array = []
var leaderboard_endless := false
var leaderboard_map := 0
var leaderboard_difficulty := 1
var leaderboard_loading := false
var leaderboard_message := ""
var profile_back_button := Rect2(55, 35, 185, 54)
var multiplayer_button := Rect2(370, 790, 250, 54)
var multiplayer_back_button := Rect2(55, 35, 185, 54)
var quick_match_button := Rect2(125, 665, 300, 64)
var friend_match_button := Rect2(475, 665, 300, 64)
var private_match_button := Rect2(825, 665, 300, 64)
var ai_match_button := Rect2(1175, 665, 300, 64)
var cancel_search_button := Rect2(625, 650, 350, 64)
var lobby_ready_button := Rect2(625, 580, 350, 58)
var room_code_input_rect := Rect2(510, 340, 580, 90)
var join_room_button := Rect2(625, 525, 350, 64)
var coop_side_button := Rect2(920, 18, 140, 54)
var room_code_input := ""
var profile_name_input := ""
var profile_message := ""
var profile_delete_armed := false
var profile_rename_button := Rect2(220, 305, 250, 48)
var profile_support_button := Rect2(570, 685, 250, 48)
var profile_privacy_button := Rect2(840, 685, 250, 48)
var profile_delete_button := Rect2(1110, 685, 250, 48)
var profile_name_input_rect := Rect2(460, 330, 680, 82)
var profile_name_save_button := Rect2(625, 470, 350, 62)
var update_button := Rect2(30, 25, 390, 54)
var update_dismiss_button := Rect2(430, 25, 54, 54)
var available_update: Dictionary = {}
var update_notice_visible := false
var audio_settings_open := false
var master_volume := 0.65
var audio_settings_button := Rect2(910, 790, 250, 54)
var exit_button := Rect2(1180, 790, 250, 54)
var audio_panel_rect := Rect2(450, 325, 700, 270)
var audio_close_button := Rect2(1010, 345, 110, 44)
var audio_slider_rect := Rect2(565, 460, 520, 32)

@onready var ads_manager = $AdsManager
@onready var account_manager = $AccountManager
@onready var multiplayer_manager = $MultiplayerManager
@onready var online_manager = $OnlineManager
@onready var update_manager = $UpdateManager
@onready var music_player: AudioStreamPlayer = $MusicPlayer
@onready var ui_sound_player: AudioStreamPlayer = $UiSoundPlayer


func _ready() -> void:
	_select_map(selected_map)
	_load_progress()
	_load_audio_settings()
	# The Android AudioTrack backend currently crashes on this generated PCM stream
	# on the supported emulator/device test target. Keep the game playable there
	# without starting native audio until we replace it with a packaged audio asset.
	if not OS.has_feature("android"):
		music_player.stream = _build_ambient_stream()
		music_player.play()
		ui_sound_player.stream = _build_ui_click_stream()
	ads_manager.energy_reward_granted.connect(_on_energy_reward_granted)
	ads_manager.ad_unavailable.connect(_show_status)
	ads_manager.victory_interstitial_finished.connect(_on_victory_interstitial_finished)
	multiplayer_manager.online_game_ready.connect(_start_coop_online_game)
	multiplayer_manager.online_snapshot_updated.connect(_apply_online_snapshot)
	multiplayer_manager.online_event_received.connect(_handle_online_event)
	update_manager.update_available.connect(_on_update_available)
	queue_redraw()


func _process(delta: float) -> void:
	elapsed += delta
	if status_timer > 0.0:
		status_timer -= delta
	if game_mode == "playing":
		if auto_wave_countdown > 0.0:
			auto_wave_countdown -= delta
			if auto_wave_countdown <= 0.0 and auto_start_waves and not wave_active and (endless_mode or wave < MAX_WAVES):
				_start_wave()
		if coop_online_mode:
			_update_online_interpolation(delta)
			_update_effects(delta)
		else:
			var simulation_delta := delta * game_speed
			_update_wave(simulation_delta)
			_update_enemies(simulation_delta)
			_update_towers(simulation_delta)
			_update_projectiles(simulation_delta)
			_update_effects(simulation_delta)
	queue_redraw()


func _update_wave(delta: float) -> void:
	if not wave_active:
		return
	if enemies_to_spawn > 0:
		spawn_timer -= delta
		if spawn_timer <= 0.0:
			_spawn_enemy()
			enemies_to_spawn -= 1
			spawn_timer = maxf(0.24, (0.82 - wave * 0.025) * float(_difficulty().spawn_delay))
	elif enemies.is_empty():
		wave_active = false
		if wave >= MAX_WAVES and not endless_mode:
			_offer_endless_mode()
			return
		var bonus := int((55 + wave * 8) * float(_difficulty().income))
		_award_credits(0, bonus)
		if coop_mode:
			_award_credits(1, bonus)
		_show_status("WELLE %d ABGEWEHRT  +%d" % [wave, bonus])
		if wave > best_wave:
			best_wave = wave
			_save_progress()
		if auto_start_waves and (wave < MAX_WAVES or endless_mode) and not coop_online_mode:
			auto_wave_countdown = 1.4
			_show_status("WELLE ABGEWEHRT  •  NÄCHSTE WELLE IN 1,4 S")


func _spawn_enemy() -> void:
	var is_boss := wave > 0 and wave % BOSS_WAVE_INTERVAL == 0 and enemies_to_spawn <= (2 if coop_mode else 1)
	var type := _enemy_type_for_wave(wave, randf(), is_boss)
	var data: Dictionary = ENEMY_DATA[type]
	var health_scale := _enemy_health_scale(wave, is_boss)
	var route_id := 0
	var route := path_points
	if coop_mode:
		route_id = next_spawn_route
		next_spawn_route = (next_spawn_route + 1) % coop_paths.size()
		route = coop_paths[route_id]
	enemies.append({
		"id": next_enemy_id,
		"type": type,
		"pos": route[0],
		"path_index": 1,
		"route_id": route_id,
		"hp": data.hp * health_scale,
		"max_hp": data.hp * health_scale,
		"speed": data.speed * (1.0 + wave * 0.012) * (0.82 if is_boss else 1.0) * float(_difficulty().speed),
		"reward": int((data.reward + wave) * (4 if is_boss else 1) * float(_difficulty().income)),
		"angle": 0.0,
		"flash": 0.0,
		"boss": is_boss,
		"size_scale": 1.34 if is_boss else 1.0,
		"shield": bool(data.get("default_shield", false)) or (wave >= 4 and randf() < minf(0.42, 0.10 + wave * 0.018 + selected_difficulty * 0.06)),
		"shield_resistance": float(data.shield_resistance)
	})
	if is_boss:
		_show_status("WARNUNG: KOMMANDOSCHIFF IM ANFLUG")
	next_enemy_id += 1


func _enemy_type_for_wave(for_wave: int, roll: float, is_boss: bool) -> int:
	if is_boss:
		return 5
	var advanced_offset := 2 if selected_difficulty == 2 else (1 if selected_difficulty == 1 else 0)
	if for_wave >= 10 - advanced_offset and roll >= 0.94:
		return 5
	if for_wave >= 7 - advanced_offset and roll >= 0.80:
		return 4
	if for_wave >= 4 - advanced_offset and roll >= 0.65:
		return 3
	if for_wave >= 7 and roll >= 0.45:
		return 2
	if for_wave >= 3 and roll >= 0.28:
		return 1
	return 0


func _enemy_health_scale(for_wave: int, is_boss: bool) -> float:
	var early_ramp := maxf(0.0, for_wave - 1.0) * 0.20
	var post_four_ramp := maxf(0.0, for_wave - 3.0) * 0.09
	var hard_late_ramp := maxf(0.0, for_wave - 5.0) * 0.055 if selected_difficulty == 2 else 0.0
	var endless_ramp := maxf(0.0, for_wave - MAX_WAVES) * 0.035 if endless_mode else 0.0
	return (1.0 + early_ramp + post_four_ramp + hard_late_ramp + endless_ramp) * (3.25 if is_boss else 1.0) * float(_difficulty().hp)


func _update_enemies(delta: float) -> void:
	for enemy in enemies.duplicate():
		if enemy.flash > 0.0:
			enemy.flash -= delta
		var route: PackedVector2Array = _enemy_route(enemy)
		var target: Vector2 = route[enemy.path_index]
		var direction: Vector2 = enemy.pos.direction_to(target)
		enemy.angle = direction.angle()
		enemy.pos += direction * enemy.speed * delta
		if enemy.pos.distance_to(target) < 9.0:
			enemy.path_index += 1
			if enemy.path_index >= route.size():
				enemies.erase(enemy)
				var enemy_data: Dictionary = ENEMY_DATA[int(enemy.type)]
				reactor_lives -= int(enemy_data.breach_damage) + (4 if enemy.boss else 0)
				if coop_mode:
					multiplayer_manager.shared_reactor_lives = maxi(0, reactor_lives)
				_spawn_burst(route[-1], Color("54dfff"), 16)
				if reactor_lives <= 0:
					_game_over()


func _update_towers(delta: float) -> void:
	for tower in towers:
		tower.cooldown -= delta
		var target := _find_target(tower)
		if target.is_empty():
			continue
		tower.angle = _tower_aim_angle(tower.type, tower.pos, target.pos)
		if tower.cooldown <= 0.0:
			_fire_tower(tower, target)
			tower.cooldown = _tower_cooldown(tower.type, tower.level)


func _find_target(tower: Dictionary) -> Dictionary:
	var best: Dictionary = {}
	var best_progress := -1.0
	var effective_range := _tower_range(tower.type, tower.level)
	for enemy in enemies:
		if tower.pos.distance_to(enemy.pos) <= effective_range:
			var route: PackedVector2Array = _enemy_route(enemy)
			var progress: float = enemy.path_index * 1000.0 - enemy.pos.distance_to(route[enemy.path_index])
			if progress > best_progress:
				best_progress = progress
				best = enemy
	return best


func _fire_tower(tower: Dictionary, target: Dictionary) -> void:
	var data: Dictionary = TOWER_DATA[tower.type]
	var damage := _tower_damage(tower.type, tower.level)
	if tower.type == 1:
		_apply_damage(target, damage, int(tower.get("owner", 0)), tower.type)
		beams.append({"from": tower.pos, "to": target.pos, "ttl": 0.09, "color": data.color})
	else:
		projectiles.append({
			"pos": tower.pos,
			"target_id": target.id,
			"damage": damage,
			"speed": data.shot_speed,
			"type": tower.type,
			"owner": int(tower.get("owner", 0)),
			"color": data.color
		})


func _update_projectiles(delta: float) -> void:
	for shot in projectiles.duplicate():
		var target := _enemy_by_id(shot.target_id)
		if target.is_empty():
			projectiles.erase(shot)
			continue
		var direction: Vector2 = shot.pos.direction_to(target.pos)
		shot.pos += direction * shot.speed * delta
		if shot.pos.distance_to(target.pos) < 14.0:
			if shot.type in [2, 3, 4]:
				var blast_radius := 76.0 if shot.type == 2 else (92.0 if shot.type == 3 else 118.0)
				var splash_factor := 0.45 if shot.type == 2 else (0.62 if shot.type == 3 else 0.38)
				for enemy in enemies.duplicate():
					if enemy.pos.distance_to(target.pos) < blast_radius:
						_apply_damage(enemy, shot.damage if enemy.id == target.id else shot.damage * splash_factor, int(shot.get("owner", 0)), int(shot.type))
				var blast_color: Color = Color("ff9b4a") if shot.type == 2 else (Color("db65ff") if shot.type == 3 else Color("71eaff"))
				_spawn_burst(target.pos, blast_color, 14 if shot.type == 2 else 18)
			else:
				_apply_damage(target, shot.damage, int(shot.get("owner", 0)), int(shot.type))
				_spawn_burst(target.pos, shot.color, 4)
			projectiles.erase(shot)


func _apply_damage(enemy: Dictionary, amount: float, owner := 0, weapon_type := -1) -> void:
	if not enemies.has(enemy):
		return
	var applied_damage := amount
	if bool(enemy.get("shield", false)) and weapon_type not in [1, 5]:
		applied_damage *= float(enemy.get("shield_resistance", 0.28))
	enemy.hp -= applied_damage
	enemy.flash = 0.06
	if enemy.hp <= 0.0:
		_award_credits(owner, int(enemy.reward))
		_spawn_burst(enemy.pos, Color("ff6b3d"), 11 + enemy.type * 4)
		enemies.erase(enemy)


func _enemy_route(enemy: Dictionary) -> PackedVector2Array:
	if coop_mode and not coop_paths.is_empty():
		return coop_paths[clampi(int(enemy.get("route_id", 0)), 0, coop_paths.size() - 1)]
	return path_points


func _enemy_by_id(id: int) -> Dictionary:
	for enemy in enemies:
		if enemy.id == id:
			return enemy
	return {}


func _spawn_burst(position: Vector2, color: Color, count: int) -> void:
	for index in count:
		var angle := randf() * TAU
		var speed := randf_range(45.0, 180.0)
		particles.append({"pos": position, "vel": Vector2.from_angle(angle) * speed, "ttl": randf_range(0.22, 0.55), "color": color})


func _update_effects(delta: float) -> void:
	for beam in beams.duplicate():
		beam.ttl -= delta
		if beam.ttl <= 0.0:
			beams.erase(beam)
	for particle in particles.duplicate():
		particle.pos += particle.vel * delta
		particle.vel *= 0.94
		particle.ttl -= delta
		if particle.ttl <= 0.0:
			particles.erase(particle)


func _unhandled_input(event: InputEvent) -> void:
	if event is InputEventKey and event.pressed and not event.echo and event.keycode in [KEY_ESCAPE, KEY_BACK, KEY_Q]:
		if audio_settings_open:
			audio_settings_open = false
			_save_audio_settings()
			queue_redraw()
			return
		if game_mode == "menu":
			get_tree().quit()
			return
	if audio_settings_open and event is InputEventMouseMotion and (event.button_mask & MOUSE_BUTTON_MASK_LEFT) != 0:
		_set_master_volume((event.position.x - audio_slider_rect.position.x) / audio_slider_rect.size.x)
		return
	if audio_settings_open and event is InputEventScreenDrag:
		_set_master_volume((event.position.x - audio_slider_rect.position.x) / audio_slider_rect.size.x)
		return
	if audio_settings_open and ((event is InputEventMouseButton and event.button_index == MOUSE_BUTTON_LEFT and not event.pressed) or (event is InputEventScreenTouch and not event.pressed)):
		_save_audio_settings()
		return
	if game_mode == "profile_name_entry" and event is InputEventKey and event.pressed and not event.echo:
		if event.keycode == KEY_ESCAPE:
			_hide_virtual_keyboard()
			game_mode = "profile"
		elif event.keycode == KEY_BACKSPACE:
			profile_name_input = profile_name_input.left(maxi(0, profile_name_input.length() - 1))
		elif event.keycode == KEY_ENTER:
			_save_profile_name()
		elif event.unicode > 0 and profile_name_input.length() < AccountManager.MAX_DISPLAY_NAME_LENGTH:
			var character := char(event.unicode)
			var allowed := "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 _-ÄÖÜäöüß"
			if allowed.contains(character):
				profile_name_input += character
		queue_redraw()
		return
	if game_mode == "room_code_entry" and event is InputEventKey and event.pressed and not event.echo:
		if event.keycode == KEY_ESCAPE:
			_hide_virtual_keyboard()
			game_mode = "multiplayer_menu"
		elif event.keycode == KEY_BACKSPACE:
			room_code_input = room_code_input.left(maxi(0, room_code_input.length() - 1))
		elif event.keycode == KEY_ENTER:
			_join_entered_room()
		elif event.unicode > 0 and room_code_input.length() < 6:
			var character := char(event.unicode).to_upper()
			if "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789".contains(character):
				room_code_input += character
		queue_redraw()
		return
	if event is InputEventKey and event.pressed and not event.echo and event.keycode in [KEY_P, KEY_ESCAPE] and game_mode in ["playing", "paused"]:
		_toggle_pause()
		return
	if event is InputEventScreenTouch and event.pressed:
		cursor_screen_position = event.position
		cursor_position = event.position + camera_offset
		_handle_pointer(event.position, true)
	elif event is InputEventMouseButton and event.button_index == MOUSE_BUTTON_LEFT and event.pressed:
		cursor_screen_position = event.position
		cursor_position = event.position + camera_offset
		_handle_pointer(event.position, false)
	elif event is InputEventMouseMotion:
		cursor_screen_position = event.position
		cursor_position = event.position + camera_offset


func _handle_pointer(position: Vector2, is_touch := false) -> void:
	_play_ui_sound()
	if audio_settings_open:
		if audio_close_button.has_point(position) or not audio_panel_rect.has_point(position):
			audio_settings_open = false
			_save_audio_settings()
		elif audio_slider_rect.grow(12.0).has_point(position):
			_set_master_volume((position.x - audio_slider_rect.position.x) / audio_slider_rect.size.x)
			_save_audio_settings()
		queue_redraw()
		return
	if game_mode == "menu":
		if update_notice_visible and update_button.has_point(position):
			OS.shell_open(str(available_update.get("url", "https://void-bastion.gergames.de/")))
			return
		if update_notice_visible and update_dismiss_button.has_point(position):
			update_notice_visible = false
			queue_redraw()
			return
		if profile_button.has_point(position):
			game_mode = "profile"
			queue_redraw()
			return
		if audio_settings_button.has_point(position):
			audio_settings_open = true
			queue_redraw()
			return
		if exit_button.has_point(position):
			get_tree().quit()
			return
		if shop_button.has_point(position):
			store_return_mode = "menu"
			store_tab = "towers"
			game_mode = "store"
			queue_redraw()
			return
		if menu_step == "difficulty" and map_step_back_button.has_point(position):
			menu_step = "map"
			queue_redraw()
			return
		if menu_step == "map":
			for index in map_buttons.size():
				if map_buttons[index].has_point(position):
					var map_index := index
					if not unlocked_maps.has(map_index):
						store_return_mode = "menu"
						store_tab = "maps"
						game_mode = "store"
						queue_redraw()
						return
					_select_map(map_index)
					menu_step = "difficulty"
					queue_redraw()
					return
		else:
			for index in difficulty_buttons.size():
				if difficulty_buttons[index].has_point(position):
					selected_difficulty = index
					_save_progress()
					queue_redraw()
					return
		if menu_step == "difficulty" and start_button.has_point(position):
			_start_game()
		elif leaderboard_button.has_point(position):
			_open_leaderboard()
		elif multiplayer_button.has_point(position):
			game_mode = "multiplayer_menu"
			queue_redraw()
		return
	if game_mode == "store":
		if shop_back_button.has_point(position):
			game_mode = store_return_mode
			queue_redraw()
			return
		if store_tower_tab_button.has_point(position):
			store_tab = "towers"
			queue_redraw()
			return
		if store_map_tab_button.has_point(position):
			store_tab = "maps"
			queue_redraw()
			return
		if store_tab == "maps":
			for index in map_shop_purchase_buttons.size():
				if map_shop_purchase_buttons[index].has_point(position):
					_buy_map_with_crystals(index + 3)
					queue_redraw()
					return
		else:
			for index in shop_purchase_buttons.size():
				if shop_purchase_buttons[index].has_point(position):
					_buy_tower_with_crystals(index + 3)
					queue_redraw()
					return
		return
	if game_mode == "leaderboard":
		if leaderboard_back_button.has_point(position):
			game_mode = "menu"
		elif leaderboard_mission_button.has_point(position) and leaderboard_endless:
			leaderboard_endless = false
			_refresh_leaderboard()
		elif leaderboard_endless_button.has_point(position) and not leaderboard_endless:
			leaderboard_endless = true
			_refresh_leaderboard()
		elif leaderboard_refresh_button.has_point(position):
			_refresh_leaderboard()
		elif leaderboard_map_previous_button.has_point(position):
			leaderboard_map = wrapi(leaderboard_map - 1, 0, MAP_NAMES.size())
			_refresh_leaderboard()
		elif leaderboard_map_button.has_point(position) or leaderboard_map_next_button.has_point(position):
			leaderboard_map = wrapi(leaderboard_map + 1, 0, MAP_NAMES.size())
			_refresh_leaderboard()
		elif leaderboard_difficulty_previous_button.has_point(position):
			leaderboard_difficulty = wrapi(leaderboard_difficulty - 1, 0, DIFFICULTY_DATA.size())
			_refresh_leaderboard()
		elif leaderboard_difficulty_button.has_point(position) or leaderboard_difficulty_next_button.has_point(position):
			leaderboard_difficulty = wrapi(leaderboard_difficulty + 1, 0, DIFFICULTY_DATA.size())
			_refresh_leaderboard()
		queue_redraw()
		return
	if game_mode == "multiplayer_menu":
		if multiplayer_back_button.has_point(position):
			game_mode = "menu"
		elif quick_match_button.has_point(position):
			_open_matchmaking("quick")
		elif friend_match_button.has_point(position):
			_open_room_code_entry()
		elif private_match_button.has_point(position):
			_open_private_room()
		elif ai_match_button.has_point(position):
			_start_coop_ai_game()
		queue_redraw()
		return
	if game_mode == "room_code_entry":
		if multiplayer_back_button.has_point(position):
			_hide_virtual_keyboard()
			game_mode = "multiplayer_menu"
		elif room_code_input_rect.has_point(position):
			_show_room_code_keyboard()
		elif join_room_button.has_point(position):
			_join_entered_room()
		queue_redraw()
		return
	if game_mode == "matchmaking":
		if lobby_ready_button.has_point(position) and multiplayer_manager.matchmaking_state in ["hosting", "matched", "lobby", "reconnected"]:
			multiplayer_manager.toggle_lobby_ready()
		elif cancel_search_button.has_point(position) or multiplayer_back_button.has_point(position):
			multiplayer_manager.cancel_search()
			game_mode = "multiplayer_menu"
			queue_redraw()
		return
	if game_mode == "profile":
		if profile_back_button.has_point(position):
			profile_delete_armed = false
			game_mode = "menu"
		elif profile_rename_button.has_point(position):
			_open_profile_name_entry()
		elif profile_support_button.has_point(position):
			OS.shell_open(_support_email_url())
		elif profile_privacy_button.has_point(position):
			OS.shell_open("https://void-bastion.gergames.de/privacy.html")
		elif profile_delete_button.has_point(position):
			if not online_manager.is_authenticated():
				profile_message = "Kontolöschung benötigt eine Verbindung zum GerGames-Server."
			elif not profile_delete_armed:
				profile_delete_armed = true
				profile_message = "Noch einmal bestätigen: Online-Konto, Ranglisten und lokale Werte werden gelöscht."
			else:
				_delete_profile_account()
			queue_redraw()
		return
	if game_mode == "profile_name_entry":
		if profile_back_button.has_point(position):
			_hide_virtual_keyboard()
			game_mode = "profile"
		elif profile_name_input_rect.has_point(position):
			_show_profile_name_keyboard()
		elif profile_name_save_button.has_point(position):
			_save_profile_name()
		queue_redraw()
		return
	if back_button.has_point(position):
		_return_to_menu()
		return
	if coop_mode and coop_side_button.has_point(position):
		_toggle_coop_side()
		return
	if game_mode in ["game_over", "victory", "endless_result"]:
		if start_button.has_point(position):
			if game_mode == "victory":
				_return_to_menu()
			elif coop_ai_mode:
				_start_coop_ai_game()
			else:
				_start_game()
		return
	if game_mode == "endless_offer":
		if victory_reward_pending:
			return
		if endless_button.has_point(position):
			_start_endless_mode()
		elif finish_mission_button.has_point(position):
			_mission_complete()
		return
	if not tutorial_completed and tutorial_skip_button.has_point(position):
		_complete_tutorial()
		return
	if ads_manager.can_offer_rewarded() and reward_ad_button.has_point(position):
		ads_manager.request_rewarded_energy()
		return
	if pause_button.has_point(position):
		_toggle_pause()
		return
	if speed_dropdown_open:
		for speed_index in SPEED_OPTIONS.size():
			if _speed_option_rect(speed_index).has_point(position):
				game_speed = SPEED_OPTIONS[speed_index]
				speed_dropdown_open = false
				_show_status("SIMULATION  %.0f×" % game_speed)
				queue_redraw()
				return
		speed_dropdown_open = false
	if speed_button.has_point(position):
		if coop_online_mode:
			_show_status("ONLINE-SIMULATION LÄUFT AUF SERVERTEMPO")
			return
		speed_dropdown_open = true
		queue_redraw()
		return
	if auto_wave_button.has_point(position):
		auto_start_waves = not auto_start_waves
		if not auto_start_waves:
			auto_wave_countdown = 0.0
		_show_status("AUTO-WELLENSTART %s" % ("EIN" if auto_start_waves else "AUS"))
		queue_redraw()
		return
	if game_mode == "paused":
		return
	if wave_button.has_point(position):
		_start_wave()
		return
	for index in tower_buttons.size():
		if tower_buttons[index].has_point(position):
			var tower_type := index
			if not unlocked_towers.has(tower_type):
				store_return_mode = game_mode
				game_mode = "store"
				queue_redraw()
				return
			selected_tower_type = tower_type
			selected_tower_index = -1
			pending_touch_build_position = Vector2(-1, -1)
			if not tutorial_completed and tutorial_step == 0:
				tutorial_step = 1
			return
	if selected_tower_index >= 0:
		if upgrade_button.has_point(position):
			_upgrade_selected()
			return
		if sell_button.has_point(position):
			_sell_selected()
			return
	var world_position := position + camera_offset
	var existing := _tower_at(world_position)
	if existing >= 0:
		if coop_mode and int(towers[existing].get("owner", 0)) != _local_credit_slot():
			_show_status("PARTNER-TURM  •  NICHT VERFÜGBAR")
			return
		selected_tower_index = existing
		selected_tower_type = -1
		pending_touch_build_position = Vector2(-1, -1)
		return
	if selected_tower_type >= 0 and position.y > PLAYFIELD_TOP and position.y < PLAYFIELD_BOTTOM:
		var snapped_position := _snap_to_grid(world_position)
		if is_touch and pending_touch_build_position != snapped_position:
			pending_touch_build_position = snapped_position
			_show_status("REICHWEITE PRÜFEN  •  ERNEUT TIPPEN ZUM BAUEN")
			return
		_place_tower(world_position)


func _select_map(index: int) -> void:
	coop_mode = false
	coop_ai_mode = false
	coop_online_mode = false
	selected_map = clampi(index, 0, MAP_TEXTURES.size() - 1)
	path_points = PackedVector2Array()
	for point in MAP_PATHS[selected_map]:
		path_points.append(point * WORLD_SCALE)
	_validate_route_ends_at_reactor(path_points, selected_map)
	_rebuild_path_cells()
	build_zones.clear()
	for zone in MAP_BUILD_ZONES[selected_map]:
		build_zones.append(Rect2(zone.position * WORLD_SCALE, zone.size * WORLD_SCALE))
	camera_offset = Vector2.ZERO
	queue_redraw()


func _configure_coop_arena() -> void:
	coop_paths.clear()
	var left := PackedVector2Array(COOP_LEFT_PATH)
	var right: PackedVector2Array = multiplayer_manager.mirrored_path(left, COOP_WORLD_WIDTH)
	coop_paths.append(left)
	coop_paths.append(right)
	path_points = left
	path_cells.clear()
	for route in coop_paths:
		_add_path_cells(route)
	build_zones = [Rect2(120, PLAYFIELD_TOP, 1280, PLAYFIELD_BOTTOM - PLAYFIELD_TOP), Rect2(1560, PLAYFIELD_TOP, 1280, PLAYFIELD_BOTTOM - PLAYFIELD_TOP)]
	camera_offset = Vector2.ZERO
	if left[-1].distance_to(COOP_REACTOR_CENTER) > 1.0 or right[-1].distance_to(COOP_REACTOR_CENTER) > 1.0:
		push_error("Koop-Routen müssen sichtbar im gemeinsamen Reaktor enden.")


func _validate_route_ends_at_reactor(route: PackedVector2Array, map_index: int) -> bool:
	if route.is_empty() or map_index < 0 or map_index >= MAP_REACTOR_ZONES.size():
		push_error("Kartenroute oder Reaktordaten fehlen.")
		return false
	var reactor_center: Vector2 = MAP_REACTOR_ZONES[map_index][0].center
	var is_connected := route[-1].distance_to(reactor_center) <= 1.0
	if not is_connected:
		push_error("Karte %s: Der Laufweg muss exakt im Reaktormittelpunkt enden." % MAP_NAMES[map_index])
	return is_connected


func _toggle_coop_side() -> void:
	selected_tower_type = -1
	selected_tower_index = -1
	pending_touch_build_position = Vector2(-1, -1)
	camera_offset.x = COOP_WORLD_WIDTH - SCREEN.x if camera_offset.x < 1.0 else 0.0
	cursor_position = cursor_screen_position + camera_offset
	var side_name := "PARTNER-SEITE" if coop_online_mode else "KI-SEITE"
	_show_status(side_name if camera_offset.x > 0.0 else "DEINE SEITE")


func _start_coop_ai_game() -> void:
	coop_mode = true
	coop_ai_mode = true
	coop_online_mode = false
	local_player_slot = 0
	_configure_coop_arena()
	multiplayer_manager.reset_coop_session(int(_difficulty().start_credits), 30)
	credits = multiplayer_manager.player_credits[0]
	reactor_lives = multiplayer_manager.shared_reactor_lives
	wave = 0
	towers_built_this_run = 0
	auto_wave_countdown = 0.0
	towers.clear()
	enemies.clear()
	projectiles.clear()
	beams.clear()
	particles.clear()
	selected_tower_type = -1
	selected_tower_index = -1
	pending_touch_build_position = Vector2(-1, -1)
	wave_active = false
	endless_mode = false
	mission_reward_granted = false
	last_mission_reward = 0
	victory_reward_pending = false
	next_spawn_route = 0
	game_mode = "playing"
	game_speed = 1.0
	tutorial_step = 3
	ads_manager.begin_mission()
	_run_ai_builder(true)
	_show_status("KOOP-ARENA ONLINE  •  KI-PARTNER BEREIT")


func _start_coop_online_game(player_slot: int) -> void:
	local_player_slot = clampi(player_slot, 0, 1)
	coop_mode = true
	coop_ai_mode = false
	coop_online_mode = true
	_configure_coop_arena()
	wave = 0
	towers.clear()
	enemies.clear()
	projectiles.clear()
	beams.clear()
	particles.clear()
	selected_tower_type = -1
	selected_tower_index = -1
	pending_touch_build_position = Vector2(-1, -1)
	wave_active = false
	endless_mode = false
	mission_reward_granted = false
	last_mission_reward = 0
	victory_reward_pending = false
	game_mode = "playing"
	game_speed = 1.0
	tutorial_step = 3
	camera_offset.x = COOP_WORLD_WIDTH - SCREEN.x if local_player_slot == 1 else 0.0
	ads_manager.begin_mission()
	_apply_online_snapshot(multiplayer_manager.latest_snapshot)
	_show_status("ONLINE-KOOP BEREIT  •  DU VERTEIDIGST %s" % ("RECHTS" if local_player_slot == 1 else "LINKS"))


func _open_matchmaking(mode: String) -> void:
	multiplayer_manager.reset_coop_session(int(_difficulty().start_credits), 30)
	multiplayer_manager.begin_search(mode, selected_difficulty)
	game_mode = "matchmaking"
	queue_redraw()


func _open_private_room() -> void:
	multiplayer_manager.reset_coop_session(int(_difficulty().start_credits), 30)
	multiplayer_manager.create_private_room(selected_difficulty)
	game_mode = "matchmaking"
	queue_redraw()


func _open_room_code_entry() -> void:
	room_code_input = ""
	game_mode = "room_code_entry"
	_show_room_code_keyboard()
	queue_redraw()


func _join_entered_room() -> void:
	if room_code_input.length() != 6:
		_show_status("DER RAUMCODE MUSS SECHS ZEICHEN HABEN")
		return
	_hide_virtual_keyboard()
	multiplayer_manager.reset_coop_session(int(_difficulty().start_credits), 30)
	multiplayer_manager.join_private_room(room_code_input)
	game_mode = "matchmaking"
	queue_redraw()


func _show_room_code_keyboard() -> void:
	if DisplayServer.has_feature(DisplayServer.FEATURE_VIRTUAL_KEYBOARD):
		DisplayServer.virtual_keyboard_show(room_code_input, room_code_input_rect, DisplayServer.KEYBOARD_TYPE_DEFAULT, 6, room_code_input.length(), room_code_input.length())


func _hide_virtual_keyboard() -> void:
	if DisplayServer.has_feature(DisplayServer.FEATURE_VIRTUAL_KEYBOARD):
		DisplayServer.virtual_keyboard_hide()


func _app_version() -> String:
	return str(ProjectSettings.get_setting("application/config/version", "Entwicklung"))


func _support_email_url() -> String:
	var subject := "Void Bastion Feedback %s" % _app_version()
	var body := "Version: %s\nPlattform: %s\nSpieler-ID: %s\n\nBeschreibung:\n" % [
		_app_version(),
		OS.get_name(),
		account_manager.short_id(),
	]
	return "mailto:support@gergames.de?subject=%s&body=%s" % [subject.uri_encode(), body.uri_encode()]


func _open_profile_name_entry() -> void:
	profile_name_input = account_manager.display_name
	profile_message = ""
	profile_delete_armed = false
	game_mode = "profile_name_entry"
	_show_profile_name_keyboard()
	queue_redraw()


func _show_profile_name_keyboard() -> void:
	if DisplayServer.has_feature(DisplayServer.FEATURE_VIRTUAL_KEYBOARD):
		DisplayServer.virtual_keyboard_show(profile_name_input, profile_name_input_rect, DisplayServer.KEYBOARD_TYPE_DEFAULT, AccountManager.MAX_DISPLAY_NAME_LENGTH, profile_name_input.length(), profile_name_input.length())


func _save_profile_name() -> void:
	var validation_error: String = account_manager.validate_display_name(profile_name_input)
	if not validation_error.is_empty():
		profile_message = validation_error
		queue_redraw()
		return
	profile_message = "Spielername wird gespeichert …"
	queue_redraw()
	var result: Dictionary = await online_manager.update_display_name(profile_name_input)
	if not bool(result.get("accepted", false)):
		profile_message = str(result.get("error", "Der Spielername konnte nicht gespeichert werden."))
		queue_redraw()
		return
	_hide_virtual_keyboard()
	profile_message = "Spielername gespeichert%s." % (" und online synchronisiert" if bool(result.get("online", false)) else "")
	game_mode = "profile"
	queue_redraw()


func _delete_profile_account() -> void:
	profile_delete_armed = false
	profile_message = "Konto wird unwiderruflich gelöscht …"
	queue_redraw()
	var result: Dictionary = await online_manager.delete_online_account()
	if not bool(result.get("accepted", false)):
		profile_message = str(result.get("error", "Das Konto konnte nicht gelöscht werden."))
		queue_redraw()
		return
	best_wave = 0
	best_endless_wave = 0
	core_crystals = 0
	unlocked_towers = [0, 1, 2]
	unlocked_maps = [0, 1, 2]
	_save_progress()
	profile_message = "Online-Konto und lokale Profildaten gelöscht. Ein neues Gastprofil wurde erstellt."
	queue_redraw()


func _open_leaderboard() -> void:
	game_mode = "leaderboard"
	leaderboard_endless = false
	leaderboard_map = selected_map
	leaderboard_difficulty = selected_difficulty
	_refresh_leaderboard()


func _refresh_leaderboard() -> void:
	if leaderboard_loading:
		return
	leaderboard_loading = true
	leaderboard_message = "BESTENLISTE WIRD GELADEN …"
	leaderboard_rows.clear()
	queue_redraw()
	if not online_manager.is_authenticated():
		leaderboard_loading = false
		leaderboard_message = "GERGAMES-SERVER WIRD VERBUNDEN – BITTE GLEICH ERNEUT LADEN"
		queue_redraw()
		return
	leaderboard_rows = await online_manager.load_leaderboard(leaderboard_map, leaderboard_difficulty, leaderboard_endless, 12)
	leaderboard_loading = false
	leaderboard_message = "NOCH KEINE EINTRÄGE" if leaderboard_rows.is_empty() else ""
	queue_redraw()


func _start_game() -> void:
	coop_online_mode = false
	credits = int(_difficulty().start_credits)
	reactor_lives = int(_difficulty().lives)
	wave = 0
	towers_built_this_run = 0
	auto_wave_countdown = 0.0
	towers.clear()
	enemies.clear()
	projectiles.clear()
	beams.clear()
	particles.clear()
	selected_tower_type = -1
	selected_tower_index = -1
	pending_touch_build_position = Vector2(-1, -1)
	wave_active = false
	endless_mode = false
	mission_reward_granted = false
	last_mission_reward = 0
	victory_reward_pending = false
	game_mode = "playing"
	game_speed = 1.0
	camera_offset = Vector2.ZERO
	tutorial_step = 0 if not tutorial_completed else 3
	ads_manager.begin_mission()
	_show_status("VERTEIDIGUNG ONLINE")


func _return_to_menu() -> void:
	if coop_online_mode:
		online_manager.leave_current_match()
	game_mode = "menu"
	menu_step = "map"
	wave_active = false
	game_speed = 1.0
	enemies_to_spawn = 0
	towers.clear()
	enemies.clear()
	projectiles.clear()
	beams.clear()
	particles.clear()
	selected_tower_type = -1
	selected_tower_index = -1
	pending_touch_build_position = Vector2(-1, -1)
	camera_offset = Vector2.ZERO
	coop_mode = false
	coop_ai_mode = false
	coop_online_mode = false
	_select_map(selected_map)
	queue_redraw()


func _start_wave() -> void:
	if wave_active:
		_show_status("WELLE LÄUFT BEREITS")
		return
	if coop_online_mode:
		online_manager.request_wave_start()
		_show_status("WELLENSTART AN SERVER GESENDET")
		return
	wave += 1
	var wave_population_scale := 1.0 + maxf(0.0, wave - 3.0) * 0.08
	if selected_difficulty == 2:
		wave_population_scale += maxf(0.0, wave - 4.0) * 0.025
	if endless_mode:
		wave_population_scale += maxf(0.0, wave - MAX_WAVES) * 0.035
	enemies_to_spawn = ceili((7 + wave * 2) * float(_difficulty().count) * wave_population_scale) * (2 if coop_mode else 1)
	spawn_timer = 0.15
	wave_active = true
	if coop_ai_mode:
		_run_ai_builder(false)
	if not tutorial_completed and tutorial_step >= 2:
		_complete_tutorial()
	_show_status("BOSSWELLE %d" % wave if wave % BOSS_WAVE_INTERVAL == 0 else "WELLE %d NÄHERT SICH" % wave)


func _toggle_pause() -> void:
	if coop_online_mode:
		_show_status("ONLINE-PARTIEN KÖNNEN NICHT PAUSIERT WERDEN")
		return
	if game_mode == "playing":
		game_mode = "paused"
	elif game_mode == "paused":
		game_mode = "playing"


func _game_over() -> void:
	if game_mode != "playing":
		return
	if endless_mode:
		_endless_run_complete()
		return
	game_mode = "game_over"
	wave_active = false
	if wave > best_wave:
		best_wave = wave
	_record_account_score(false)
	_save_progress()


func _mission_complete() -> void:
	game_mode = "victory"
	wave_active = false


func _offer_endless_mode() -> void:
	game_mode = "endless_offer"
	wave_active = false
	best_wave = maxi(best_wave, wave)
	_record_account_score(false)
	_save_progress()
	victory_reward_pending = true
	ads_manager.show_victory_interstitial()


func _start_endless_mode() -> void:
	endless_mode = true
	game_mode = "playing"
	_show_status("ENDLOSMODUS AKTIV  •  NÄCHSTE WELLE: %d" % (wave + 1))


func _endless_run_complete() -> void:
	game_mode = "endless_result"
	wave_active = false
	best_wave = maxi(best_wave, wave)
	best_endless_wave = maxi(best_endless_wave, wave)
	_record_account_score(true)
	_save_progress()


func _on_victory_interstitial_finished(_was_shown: bool) -> void:
	if not victory_reward_pending:
		return
	victory_reward_pending = false
	_grant_map_reward()
	_save_progress()
	queue_redraw()


func _record_account_score(was_endless: bool) -> void:
	var score := _calculate_run_score()
	account_manager.record_run(selected_map, selected_difficulty, was_endless, wave, score)


func _calculate_run_score() -> int:
	var base_score := wave * 1000 + maxi(reactor_lives, 0) * 150 + _player_credits(_local_credit_slot()) * 2
	var tower_efficiency := clampf(1.0 + (10.0 - towers_built_this_run) * 0.05, 0.50, 1.50)
	return roundi(base_score * tower_efficiency)


func _grant_map_reward() -> void:
	if mission_reward_granted:
		return
	mission_reward_granted = true
	last_mission_reward = int(_difficulty().crystals)
	core_crystals += last_mission_reward
	_save_progress()


func _buy_tower_with_crystals(tower_type: int) -> void:
	if tower_type < 3 or tower_type >= TOWER_DATA.size():
		return
	if unlocked_towers.has(tower_type):
		_show_status("%s IST BEREITS FREIGESCHALTET" % TOWER_DATA[tower_type].name)
		return
	var price := int(TOWER_DATA[tower_type].unlock_cost)
	if core_crystals < price:
		_show_status("ZU WENIG KERNKRISTALLE  •  BENÖTIGT: %d" % price)
		return
	core_crystals -= price
	unlocked_towers.append(tower_type)
	unlocked_towers.sort()
	_save_progress()
	_show_status("%s FREIGESCHALTET  •  IM ARSENAL VERFÜGBAR" % TOWER_DATA[tower_type].name)


func _buy_map_with_crystals(map_index: int) -> void:
	if map_index < 3 or map_index >= MAP_NAMES.size():
		return
	if unlocked_maps.has(map_index):
		_show_status("%s IST BEREITS FREIGESCHALTET" % MAP_NAMES[map_index])
		return
	var price := int(MAP_UNLOCK_COSTS[map_index])
	if core_crystals < price:
		_show_status("ZU WENIG KERNKRISTALLE  •  BENÖTIGT: %d" % price)
		return
	core_crystals -= price
	unlocked_maps.append(map_index)
	unlocked_maps.sort()
	_save_progress()
	_show_status("%s FREIGESCHALTET  •  NEUER EINSATZSEKTOR" % MAP_NAMES[map_index])


func _difficulty() -> Dictionary:
	return DIFFICULTY_DATA[clampi(selected_difficulty, 0, DIFFICULTY_DATA.size() - 1)]


func _on_update_available(info: Dictionary) -> void:
	available_update = info.duplicate(true)
	update_notice_visible = true
	queue_redraw()


func _on_energy_reward_granted(amount: int) -> void:
	_award_credits(0, amount)
	_show_status("NOTFALLENERGIE  +%d" % amount)


func _complete_tutorial() -> void:
	tutorial_completed = true
	tutorial_step = 3
	_save_progress()
	_show_status("EINFÜHRUNG ABGESCHLOSSEN")


func _place_tower(position: Vector2) -> void:
	position = _snap_to_grid(position)
	if selected_tower_type < 0 or not unlocked_towers.has(selected_tower_type):
		_show_status("TURM ZUERST IM ARSENAL FREISCHALTEN")
		return
	var data: Dictionary = TOWER_DATA[selected_tower_type]
	var credit_slot := _local_credit_slot()
	if _player_credits(credit_slot) < data.cost:
		_show_status("NICHT GENUG ENERGIE")
		return
	if not _is_valid_build_position(position, credit_slot):
		_show_status("BAUPLATZ BLOCKIERT")
		return
	if coop_online_mode:
		online_manager.request_tower_build(selected_tower_type, position)
		selected_tower_type = -1
		pending_touch_build_position = Vector2(-1, -1)
		_show_status("BAUAUFTRAG AN SERVER GESENDET")
		return
	_spend_credits(0, int(data.cost))
	towers_built_this_run += 1
	towers.append({"pos": position, "type": selected_tower_type, "level": 1, "cooldown": 0.15, "angle": 0.0, "owner": 0})
	selected_tower_index = towers.size() - 1
	selected_tower_type = -1
	pending_touch_build_position = Vector2(-1, -1)
	if not tutorial_completed and tutorial_step == 1:
		tutorial_step = 2
	_spawn_burst(position, Color("65eaff"), 12)


func _upgrade_selected() -> void:
	if selected_tower_index < 0 or selected_tower_index >= towers.size():
		return
	var tower: Dictionary = towers[selected_tower_index]
	if coop_online_mode and int(tower.get("owner", -1)) != local_player_slot:
		_show_status("NUR EIGENE TÜRME KÖNNEN VERBESSERT WERDEN")
		return
	if tower.level >= 3:
		_show_status("MAXIMALE STUFE")
		return
	var cost: int = _upgrade_cost(tower)
	if _player_credits(_local_credit_slot()) < cost:
		_show_status("NICHT GENUG ENERGIE")
		return
	if coop_online_mode:
		online_manager.request_tower_upgrade(int(tower.get("id", -1)))
		_show_status("UPGRADE AN SERVER GESENDET")
		return
	_spend_credits(0, cost)
	tower.level += 1
	_spawn_burst(tower.pos, Color("65eaff"), 16)


func _sell_selected() -> void:
	if selected_tower_index < 0 or selected_tower_index >= towers.size():
		return
	var tower: Dictionary = towers[selected_tower_index]
	if coop_online_mode:
		if int(tower.get("owner", -1)) != local_player_slot:
			_show_status("NUR EIGENE TÜRME KÖNNEN VERKAUFT WERDEN")
			return
		online_manager.request_tower_sell(int(tower.get("id", -1)))
		selected_tower_index = -1
		_show_status("VERKAUF AN SERVER GESENDET")
		return
	var base_cost: int = TOWER_DATA[tower.type].cost
	_award_credits(0, int(base_cost * (0.55 + tower.level * 0.12)))
	towers.remove_at(selected_tower_index)
	selected_tower_index = -1


func _upgrade_cost(tower: Dictionary) -> int:
	return int(TOWER_DATA[tower.type].cost * (0.72 + tower.level * 0.28))


func _tower_damage(type: int, level: int) -> float:
	return TOWER_DATA[type].damage * (1.0 + (level - 1) * 0.52)


func _tower_range(type: int, level: int) -> float:
	return TOWER_DATA[type].range * (1.0 + (level - 1) * 0.08)


func _tower_cooldown(type: int, level: int) -> float:
	return TOWER_DATA[type].rate / (1.0 + (level - 1) * 0.12)


func _tower_shots_per_second(type: int, level: int) -> float:
	return 1.0 / _tower_cooldown(type, level)


func _tower_aim_angle(type: int, origin: Vector2, target: Vector2) -> float:
	return origin.angle_to_point(target) + (PI if type in [0, 3, 5] else 0.0)


func _tower_at(position: Vector2, radius := 52.0) -> int:
	for index in towers.size():
		if towers[index].pos.distance_to(position) <= radius:
			return index
	return -1


func _grid_cell(position: Vector2) -> Vector2i:
	return Vector2i(
		roundi((position.x - GRID_SIZE * 0.5) / GRID_SIZE),
		roundi((position.y - GRID_SIZE * 0.5) / GRID_SIZE)
	)


func _cell_center(cell: Vector2i) -> Vector2:
	return Vector2(cell) * GRID_SIZE + Vector2.ONE * GRID_SIZE * 0.5


func _rebuild_path_cells() -> void:
	path_cells.clear()
	_add_path_cells(path_points)


func _add_path_cells(route: PackedVector2Array) -> void:
	for index in route.size() - 1:
		var start := route[index]
		var finish := route[index + 1]
		var steps := maxi(1, ceili(start.distance_to(finish) / (GRID_SIZE * 0.20)))
		for step in steps + 1:
			var sample := start.lerp(finish, float(step) / float(steps))
			path_cells[_grid_cell(sample)] = true


func _is_path_cell(position: Vector2) -> bool:
	return path_cells.has(_grid_cell(position))


func _snap_to_grid(position: Vector2) -> Vector2:
	return Vector2(
		floor(position.x / GRID_SIZE) * GRID_SIZE + GRID_SIZE * 0.5,
		floor(position.y / GRID_SIZE) * GRID_SIZE + GRID_SIZE * 0.5
	)


func _is_in_build_zone(position: Vector2) -> bool:
	for zone in build_zones:
		if zone.has_point(position):
			return true
	return false


func _is_in_reactor_zone(position: Vector2) -> bool:
	if coop_mode:
		return position.distance_to(COOP_REACTOR_CENTER) <= COOP_REACTOR_RADIUS
	for reactor in MAP_REACTOR_ZONES[selected_map]:
		if position.distance_to(reactor.center) <= float(reactor.radius):
			return true
	return false


func _player_credits(player_index: int) -> int:
	if coop_mode:
		return int(multiplayer_manager.player_credits[clampi(player_index, 0, 1)])
	return credits


func _spend_credits(player_index: int, amount: int) -> bool:
	if coop_mode:
		var success: bool = multiplayer_manager.spend_player_credits(player_index, amount)
		credits = multiplayer_manager.player_credits[0]
		return success
	if credits < amount:
		return false
	credits -= amount
	return true


func _award_credits(player_index: int, amount: int) -> void:
	if coop_mode:
		multiplayer_manager.add_player_credits(player_index, amount)
		credits = multiplayer_manager.player_credits[0]
	else:
		credits += amount


func _run_ai_builder(initial_setup: bool) -> void:
	if not coop_ai_mode:
		return
	var desired_towers := mini(9, 2 + int(wave / 2))
	if initial_setup:
		desired_towers = 2
	var ai_tower_count := 0
	for tower in towers:
		if int(tower.get("owner", 0)) == 1:
			ai_tower_count += 1
	while ai_tower_count < desired_towers:
		var tower_type := ai_tower_count % TOWER_DATA.size()
		var cost: int = int(TOWER_DATA[tower_type].cost)
		if _player_credits(1) < cost:
			break
		var build_position := _find_ai_build_position(ai_tower_count)
		if build_position == Vector2.ZERO:
			break
		_spend_credits(1, cost)
		towers.append({"pos": build_position, "type": tower_type, "level": 1, "cooldown": 0.15, "angle": PI, "owner": 1})
		_spawn_burst(build_position, Color("ffbf69"), 12)
		ai_tower_count += 1
	if not initial_setup and ai_tower_count >= desired_towers:
		_upgrade_ai_tower()


func _find_ai_build_position(offset: int) -> Vector2:
	if coop_paths.size() < 2:
		return Vector2.ZERO
	var route: PackedVector2Array = coop_paths[1]
	var desired_towers := mini(9, 2 + int(wave / 2))
	var target_progress := _route_length(route) * float(offset + 1) / float(desired_towers + 1)
	var tower_range: float = TOWER_DATA[offset % TOWER_DATA.size()].range
	var best_position := Vector2.ZERO
	var best_score := INF
	for x in range(1560, 2841, 80):
		for y in range(120, 721, 80):
			var candidate := Vector2(x, y)
			if _is_valid_build_position(candidate, 1):
				var distance := _distance_to_route(candidate, route)
				if distance < 82.0 or distance > tower_range - 12.0:
					continue
				var progress := _route_progress_at(candidate, route)
				var score := absf(progress - target_progress) + absf(distance - tower_range * 0.70) * 1.25
				for tower in towers:
					if int(tower.get("owner", 0)) == 1:
						var separation: float = candidate.distance_to(tower.pos)
						if separation < 150.0:
							score += (150.0 - separation) * 4.0
				if score < best_score:
					best_score = score
					best_position = candidate
	return best_position


func _route_length(route: PackedVector2Array) -> float:
	var result := 0.0
	for index in route.size() - 1:
		result += route[index].distance_to(route[index + 1])
	return result


func _route_progress_at(position: Vector2, route: PackedVector2Array) -> float:
	var travelled := 0.0
	var best_distance := INF
	var best_progress := 0.0
	for index in route.size() - 1:
		var start: Vector2 = route[index]
		var segment: Vector2 = route[index + 1] - start
		var segment_length := segment.length()
		var ratio := clampf((position - start).dot(segment) / maxf(0.001, segment.length_squared()), 0.0, 1.0)
		var point := start + segment * ratio
		var distance := position.distance_to(point)
		if distance < best_distance:
			best_distance = distance
			best_progress = travelled + segment_length * ratio
		travelled += segment_length
	return best_progress


func _distance_to_route(position: Vector2, route: PackedVector2Array) -> float:
	var result := INF
	for index in route.size() - 1:
		var closest := Geometry2D.get_closest_point_to_segment(position, route[index], route[index + 1])
		result = minf(result, position.distance_to(closest))
	return result


func _upgrade_ai_tower() -> void:
	for tower in towers:
		if int(tower.get("owner", 0)) != 1 or int(tower.level) >= 3:
			continue
		var cost := _upgrade_cost(tower)
		if _spend_credits(1, cost):
			tower.level += 1
			_spawn_burst(tower.pos, Color("ffbf69"), 10)
			return


func _local_credit_slot() -> int:
	return local_player_slot if coop_online_mode else 0


func _apply_online_snapshot(snapshot: Dictionary) -> void:
	if not coop_online_mode or snapshot.is_empty():
		return
	selected_difficulty = clampi(int(snapshot.get("difficulty", selected_difficulty)), 0, DIFFICULTY_DATA.size() - 1)
	if bool(snapshot.get("connection_interrupted", false)):
		_show_status("MITPILOT GETRENNT  •  WIEDERBEITRITT %d S" % int(snapshot.get("reconnect_seconds", 0)))
	reactor_lives = int(snapshot.get("reactor_lives", reactor_lives))
	wave = int(snapshot.get("wave", wave))
	wave_active = bool(snapshot.get("wave_active", false))
	enemies_to_spawn = int(snapshot.get("enemies_to_spawn", 0))
	credits = _player_credits(local_player_slot)

	var previous_enemy_positions: Dictionary = {}
	for enemy in enemies:
		previous_enemy_positions[int(enemy.get("id", -1))] = enemy.get("pos", Vector2.ZERO)
	var synced_enemies: Array[Dictionary] = []
	for entry in snapshot.get("enemies", []):
		if not entry is Dictionary:
			continue
		var enemy_id := int(entry.get("id", -1))
		var target_position := Vector2(float(entry.get("x", 0.0)), float(entry.get("y", 0.0)))
		synced_enemies.append({
			"id": enemy_id,
			"type": int(entry.get("type", 0)),
			"pos": previous_enemy_positions.get(enemy_id, target_position),
			"target_pos": target_position,
			"path_index": int(entry.get("path_index", 1)),
			"route_id": int(entry.get("route_id", 0)),
			"hp": float(entry.get("hp", 1.0)),
			"max_hp": float(entry.get("max_hp", 1.0)),
			"speed": float(entry.get("speed", 0.0)),
			"reward": int(entry.get("reward", 0)),
			"angle": float(entry.get("angle", 0.0)),
			"flash": 0.0,
			"boss": bool(entry.get("boss", false)),
			"size_scale": 1.34 if bool(entry.get("boss", false)) else 1.0
		})
	enemies = synced_enemies

	var synced_towers: Array[Dictionary] = []
	for entry in snapshot.get("towers", []):
		if entry is Dictionary:
			synced_towers.append({
				"id": int(entry.get("id", -1)),
				"pos": Vector2(float(entry.get("x", 0.0)), float(entry.get("y", 0.0))),
				"type": int(entry.get("type", 0)),
				"level": int(entry.get("level", 1)),
				"owner": int(entry.get("owner", 0)),
				"cooldown": float(entry.get("cooldown", 0.0)),
				"angle": float(entry.get("angle", 0.0))
			})
	towers = synced_towers
	if selected_tower_index >= towers.size():
		selected_tower_index = -1
	if bool(snapshot.get("game_over", false)) and game_mode == "playing":
		_game_over()


func _update_online_interpolation(delta: float) -> void:
	var weight := clampf(delta * 12.0, 0.0, 1.0)
	for enemy in enemies:
		enemy.pos = enemy.pos.lerp(enemy.get("target_pos", enemy.pos), weight)


func _handle_online_event(event: Dictionary) -> void:
	if not coop_online_mode:
		return
	match String(event.get("type", "")):
		"wave_complete":
			_show_status("WELLE %d ABGEWEHRT  +%d" % [int(event.get("wave", wave)), int(event.get("bonus", 0))])
		"partner_left":
			_show_status("VERBINDUNG ZUM PARTNER VERLOREN")
		"command_rejected":
			_show_status("AKTION VOM SERVER ABGELEHNT")
		"server_shutdown":
			_show_status("SPIELSERVER WIRD NEU GESTARTET")


func _show_status(text: String) -> void:
	status_text = text
	status_timer = 2.1


func _load_audio_settings() -> void:
	var config := ConfigFile.new()
	if config.load("user://void_bastion_settings.cfg") == OK:
		master_volume = clampf(float(config.get_value("audio", "master_volume", master_volume)), 0.0, 1.0)
	_apply_master_volume()


func _set_master_volume(value: float) -> void:
	master_volume = clampf(value, 0.0, 1.0)
	_apply_master_volume()
	queue_redraw()


func _apply_master_volume() -> void:
	var master_bus := AudioServer.get_bus_index("Master")
	if master_bus >= 0:
		AudioServer.set_bus_volume_db(master_bus, linear_to_db(maxf(master_volume, 0.0001)))


func _save_audio_settings() -> void:
	var config := ConfigFile.new()
	config.set_value("audio", "master_volume", master_volume)
	config.save("user://void_bastion_settings.cfg")


func _build_ambient_stream() -> AudioStreamWAV:
	const sample_rate := 22050
	const duration := 12
	var frame_count := sample_rate * duration
	var samples := PackedByteArray()
	samples.resize(frame_count * 4)
	for frame in frame_count:
		var time := float(frame) / sample_rate
		var slow_breathe := 0.72 + 0.28 * sin(TAU * time / duration)
		var chord := sin(TAU * 55.0 * time) * 0.34 + sin(TAU * 82.5 * time) * 0.22 + sin(TAU * 110.0 * time) * 0.16 + sin(TAU * 165.0 * time) * 0.08
		var shimmer := sin(TAU * 220.0 * time + sin(TAU * time / duration) * 0.45) * 0.035
		var mono := clampf((chord + shimmer) * slow_breathe * 0.12, -1.0, 1.0)
		var left := int(mono * 32767.0)
		var right := int(clampf(mono * (0.97 + 0.03 * sin(TAU * time / duration)), -1.0, 1.0) * 32767.0)
		samples.encode_s16(frame * 4, left)
		samples.encode_s16(frame * 4 + 2, right)
	var stream := AudioStreamWAV.new()
	stream.format = AudioStreamWAV.FORMAT_16_BITS
	stream.mix_rate = sample_rate
	stream.stereo = true
	stream.loop_mode = AudioStreamWAV.LOOP_FORWARD
	stream.loop_end = frame_count
	stream.data = samples
	return stream


func _build_ui_click_stream() -> AudioStreamWAV:
	const sample_rate := 22050
	const duration := 0.075
	var frame_count := int(sample_rate * duration)
	var samples := PackedByteArray()
	samples.resize(frame_count * 2)
	var phase := 0.0
	for frame in frame_count:
		var time := float(frame) / sample_rate
		var frequency := lerpf(1350.0, 720.0, time / duration)
		phase += TAU * frequency / sample_rate
		var envelope := 1.0 - time / duration
		samples.encode_s16(frame * 2, int(sin(phase) * envelope * 0.14 * 32767.0))
	var stream := AudioStreamWAV.new()
	stream.format = AudioStreamWAV.FORMAT_16_BITS
	stream.mix_rate = sample_rate
	stream.stereo = false
	stream.data = samples
	return stream


func _play_ui_sound() -> void:
	if ui_sound_player.stream != null:
		ui_sound_player.play()


func _save_progress() -> void:
	var file := FileAccess.open(SAVE_PATH, FileAccess.WRITE)
	if file:
		file.store_string(JSON.stringify({
			"best_wave": best_wave,
			"best_endless_wave": best_endless_wave,
		"core_crystals": core_crystals,
		"unlocked_towers": unlocked_towers,
		"unlocked_maps": unlocked_maps,
			"selected_difficulty": selected_difficulty,
			"tutorial_completed": tutorial_completed
		}))


func _load_progress() -> void:
	if not FileAccess.file_exists(SAVE_PATH):
		return
	var file := FileAccess.open(SAVE_PATH, FileAccess.READ)
	if not file:
		return
	var data = JSON.parse_string(file.get_as_text())
	if data is Dictionary:
		best_wave = int(data.get("best_wave", 0))
		best_endless_wave = int(data.get("best_endless_wave", 0))
		core_crystals = maxi(0, int(data.get("core_crystals", 0)))
		unlocked_towers = [0, 1, 2]
		var saved_unlocks = data.get("unlocked_towers", [0, 1, 2])
		if saved_unlocks is Array:
			for tower_type in saved_unlocks:
				if int(tower_type) >= 0 and int(tower_type) < 3 and not unlocked_towers.has(int(tower_type)):
					unlocked_towers.append(int(tower_type))
				elif int(tower_type) >= 3 and int(tower_type) < TOWER_DATA.size() and not unlocked_towers.has(int(tower_type)):
					unlocked_towers.append(int(tower_type))
		unlocked_maps = [0, 1, 2]
		var saved_maps = data.get("unlocked_maps", [0, 1, 2])
		if saved_maps is Array:
			for map_index in saved_maps:
				if int(map_index) >= 3 and int(map_index) < MAP_NAMES.size() and not unlocked_maps.has(int(map_index)):
					unlocked_maps.append(int(map_index))
		selected_difficulty = clampi(int(data.get("selected_difficulty", 1)), 0, DIFFICULTY_DATA.size() - 1)
		tutorial_completed = bool(data.get("tutorial_completed", false))


func _draw() -> void:
	if game_mode in ["menu", "store", "leaderboard", "profile", "profile_name_entry", "multiplayer_menu", "room_code_entry", "matchmaking"]:
		draw_texture_rect(MAP_TEXTURES[selected_map], Rect2(Vector2.ZERO, SCREEN), false, Color("f3f6fb"))
		draw_rect(Rect2(Vector2.ZERO, SCREEN), Color(0.01, 0.025, 0.055, 0.06))
		if game_mode == "menu":
			_draw_menu()
			if audio_settings_open:
				_draw_audio_settings()
		elif game_mode == "store":
			_draw_store()
		elif game_mode == "leaderboard":
			_draw_leaderboard()
		elif game_mode == "profile":
			_draw_profile()
		elif game_mode == "profile_name_entry":
			_draw_profile_name_entry()
		elif game_mode == "multiplayer_menu":
			_draw_multiplayer_menu()
		elif game_mode == "room_code_entry":
			_draw_room_code_entry()
		else:
			_draw_matchmaking()
		return
	draw_set_transform(-camera_offset, 0.0, Vector2.ONE)
	if coop_mode:
		_draw_coop_background()
	else:
		draw_texture_rect(MAP_TEXTURES[selected_map], Rect2(Vector2.ZERO, WORLD_SIZE), false, Color.WHITE)
	draw_rect(Rect2(Vector2.ZERO, Vector2(_active_world_width(), WORLD_SIZE.y)), Color(0.01, 0.025, 0.055, 0.035))
	_draw_world()
	draw_set_transform(Vector2.ZERO, 0.0, Vector2.ONE)
	_draw_hud()
	if game_mode == "playing" and not tutorial_completed and not coop_mode:
		_draw_tutorial()
	if game_mode == "paused":
		_draw_overlay("PAUSE", "Zum Fortsetzen tippen oder P drücken")
	elif game_mode == "game_over":
		_draw_game_over()
	elif game_mode == "victory":
		_draw_victory()
	elif game_mode == "endless_offer":
		_draw_endless_offer()
	elif game_mode == "endless_result":
		_draw_endless_result()


func _active_world_width() -> float:
	return COOP_WORLD_WIDTH if coop_mode else WORLD_SIZE.x


func _draw_coop_background() -> void:
	var texture: Texture2D = MAP_TEXTURES[selected_map]
	var source_width := texture.get_width() * COOP_MIRROR_X / WORLD_SIZE.x
	var source := Rect2(0, 0, source_width, texture.get_height())
	draw_texture_rect_region(texture, Rect2(0, 0, COOP_MIRROR_X, WORLD_SIZE.y), source, Color.WHITE)
	draw_set_transform(Vector2(COOP_WORLD_WIDTH, 0) - camera_offset, 0.0, Vector2(-1, 1))
	draw_texture_rect_region(texture, Rect2(0, 0, COOP_MIRROR_X, WORLD_SIZE.y), source, Color.WHITE)
	draw_set_transform(-camera_offset, 0.0, Vector2.ONE)


func _draw_world() -> void:
	_draw_route()
	if coop_mode:
		draw_circle(COOP_REACTOR_CENTER, COOP_REACTOR_RADIUS, Color(0.02, 0.20, 0.30, 0.72))
		for radius in [94.0, 70.0, 44.0]:
			draw_arc(COOP_REACTOR_CENTER, radius, 0.0, TAU, 64, Color(0.28, 0.92, 1.0, 0.72), 3.0)
		draw_circle(COOP_REACTOR_CENTER, 25.0, Color("8ffaff"))
	_draw_reactor_approach()
	_draw_build_grid()
	if selected_tower_type >= 0 and cursor_screen_position.y > PLAYFIELD_TOP and cursor_screen_position.y < PLAYFIELD_BOTTOM:
		var snapped_position := _snap_to_grid(cursor_position)
		var valid_position := _is_valid_build_position(snapped_position, _local_credit_slot())
		var placement_color := Color(0.25, 1.0, 0.7, 0.22) if valid_position else Color(1.0, 0.2, 0.2, 0.22)
		var preview_range := _tower_range(selected_tower_type, 1)
		draw_circle(snapped_position, preview_range, Color(placement_color, 0.025))
		draw_arc(snapped_position, preview_range, 0, TAU, 96, Color(placement_color, 0.46), 1.5)
		draw_rect(Rect2(snapped_position - Vector2(35, 35), Vector2(70, 70)), Color(placement_color, 0.10), true)
		draw_rect(Rect2(snapped_position - Vector2(35, 35), Vector2(70, 70)), Color(placement_color, 0.62), false, 1.5)
		_draw_tower({"pos": snapped_position, "type": selected_tower_type, "level": 1, "angle": 0.0})
	for tower_index in towers.size():
		var tower: Dictionary = towers[tower_index]
		if tower_index == selected_tower_index:
			var range_value := _tower_range(tower.type, tower.level)
			draw_circle(tower.pos, range_value, Color(0.2, 0.85, 1.0, 0.07))
			draw_arc(tower.pos, range_value, 0, TAU, 80, Color(0.35, 0.9, 1.0, 0.45), 2.0)
		_draw_tower(tower)
	for enemy in enemies:
		_draw_enemy(enemy)
	for shot in projectiles:
		draw_circle(shot.pos, 6.0 if shot.type == 2 else 3.5, shot.color)
		draw_circle(shot.pos, 12.0 if shot.type == 2 else 7.0, Color(shot.color, 0.20))
	for beam in beams:
		draw_line(beam.from, beam.to, Color(beam.color, 0.92), 3.0)
		draw_line(beam.from, beam.to, Color.WHITE, 1.0)
	for particle in particles:
		draw_circle(particle.pos, maxf(1.0, particle.ttl * 8.0), Color(particle.color, minf(1.0, particle.ttl * 3.0)))


func _draw_route() -> void:
	for cell in path_cells:
		var center := _cell_center(cell)
		if center.x < -GRID_SIZE or center.x > _active_world_width() + GRID_SIZE or center.y < PLAYFIELD_TOP - GRID_SIZE or center.y > PLAYFIELD_BOTTOM + GRID_SIZE:
			continue
		var left := path_cells.has(cell + Vector2i(-1, 0))
		var right := path_cells.has(cell + Vector2i(1, 0))
		var up := path_cells.has(cell + Vector2i(0, -1))
		var down := path_cells.has(cell + Vector2i(0, 1))
		var texture := ROAD_STRAIGHT_TEXTURE
		var angle := 0.0
		var is_corner := (left or right) and (up or down)
		if is_corner:
			texture = ROAD_CORNER_TEXTURE
			if left and down:
				angle = 0.0
			elif left and up:
				angle = PI * 0.5
			elif right and up:
				angle = PI
			else:
				angle = PI * 1.5
		elif up or down:
			angle = PI * 0.5
		draw_set_transform(center - camera_offset, angle, Vector2.ONE)
		var variant := absi(cell.x * 3 + cell.y * 5) % 4
		var ray_x := -18.0 if variant % 2 == 0 else 18.0
		var tile_opacity := _path_cell_opacity(cell)
		if not is_corner:
			draw_colored_polygon(PackedVector2Array([Vector2(ray_x - 5, -36), Vector2(ray_x + 5, -36), Vector2(ray_x + 14, -62), Vector2(ray_x - 14, -62)]), Color(1.0, 0.48, 0.12, 0.055 * tile_opacity))
			draw_colored_polygon(PackedVector2Array([Vector2(ray_x - 5, 36), Vector2(ray_x + 5, 36), Vector2(ray_x + 14, 62), Vector2(ray_x - 14, 62)]), Color(1.0, 0.48, 0.12, 0.055 * tile_opacity))
			var source_positions := [Vector2(80, 80), Vector2(650, 80), Vector2(80, 700), Vector2(650, 700)]
			var source_position: Vector2 = source_positions[variant]
			draw_texture_rect_region(ROAD_SURFACE_TEXTURE, Rect2(-40, -31, 80, 62), Rect2(source_position, Vector2(520, 403)), Color(1.0, 1.0, 1.0, tile_opacity))
			draw_texture_rect(texture, Rect2(-GRID_SIZE * 0.5, -GRID_SIZE * 0.5, GRID_SIZE, GRID_SIZE), false, Color(1.0, 1.0, 1.0, tile_opacity))
		else:
			draw_texture_rect(texture, Rect2(-GRID_SIZE * 0.5, -GRID_SIZE * 0.5, GRID_SIZE, GRID_SIZE), false, Color(1.0, 1.0, 1.0, tile_opacity))
			draw_texture_rect(ROAD_CORNER_SURFACE_TEXTURE, Rect2(-GRID_SIZE * 0.5, -GRID_SIZE * 0.5, GRID_SIZE, GRID_SIZE), false, Color(1.0, 1.0, 1.0, tile_opacity))
	draw_set_transform(-camera_offset, 0.0, Vector2.ONE)


func _path_cell_opacity(cell: Vector2i) -> float:
	var routes: Array = [path_points]
	if coop_mode:
		routes = coop_paths
	var center := _cell_center(cell)
	var nearest_remaining := INF
	for route in routes:
		if route.size() < 2:
			continue
		var length_after_segment := 0.0
		for segment_index in range(route.size() - 2, -1, -1):
			var segment_start: Vector2 = route[segment_index]
			var segment_end: Vector2 = route[segment_index + 1]
			var segment := segment_end - segment_start
			var segment_length := segment.length()
			if segment_length > 0.0:
				var direction := segment / segment_length
				var distance_along := clampf((center - segment_start).dot(direction), 0.0, segment_length)
				var projection := segment_start + direction * distance_along
				if center.distance_to(projection) <= GRID_SIZE * 0.55:
					var remaining := center.distance_to(projection) + segment_length - distance_along + length_after_segment
					nearest_remaining = minf(nearest_remaining, remaining)
			length_after_segment += segment_length
	if nearest_remaining >= 320.0:
		return 1.0
	var fade_progress := clampf(nearest_remaining / 320.0, 0.0, 1.0)
	return fade_progress * fade_progress * (3.0 - 2.0 * fade_progress)


func _draw_reactor_approach() -> void:
	var routes: Array = [path_points]
	if coop_mode:
		routes = coop_paths
	for route in routes:
		if route.size() < 2:
			continue
		var approach_start: Vector2 = route[route.size() - 2]
		var reactor_end: Vector2 = route[route.size() - 1]
		var direction := approach_start.direction_to(reactor_end)
		var approach_color := Color("65eaff")
		# Fade the road's cyan guide in short overlapping steps as it reaches the core.
		for segment_index in 12:
			var progress_start := float(segment_index) / 12.0
			var progress_end := float(segment_index + 1) / 12.0
			var fade := 1.0 - (progress_start + progress_end) * 0.5
			var fade_start := approach_start.lerp(reactor_end, progress_start)
			var fade_end := approach_start.lerp(reactor_end, progress_end)
			draw_line(fade_start, fade_end, Color(approach_color, 0.10 * fade), 13.0, true)
			draw_line(fade_start, fade_end, Color(approach_color, 0.18 * fade), 2.0, true)
		# Multiple dim pulses travel inward, like energy being carried to the core.
		for pulse_index in 3:
			var pulse_progress := fposmod(elapsed * 0.34 + float(pulse_index) / 3.0, 1.0)
			var pulse_position := approach_start.lerp(reactor_end, pulse_progress)
			var pulse_alpha := (0.22 + 0.12 * sin(pulse_progress * PI)) * (1.0 - pulse_progress * 0.72)
			draw_line(pulse_position - direction * 12.0, pulse_position + direction * 12.0, Color(approach_color, pulse_alpha), 3.0, true)
			draw_circle(pulse_position, 7.0, Color(approach_color, pulse_alpha * 0.20))
			draw_circle(pulse_position, 2.2, Color(0.78, 0.98, 1.0, pulse_alpha + 0.18))
		var reactor_breathe := 0.5 + 0.5 * sin(elapsed * TAU * 0.42)
		draw_circle(reactor_end, 13.0 + reactor_breathe * 3.0, Color(approach_color, 0.035 + reactor_breathe * 0.025))
		draw_arc(reactor_end, 22.0 + reactor_breathe * 2.0, 0.0, TAU, 40, Color(approach_color, 0.10 + reactor_breathe * 0.08), 1.5)


func _draw_build_grid() -> void:
	var line_color := Color(0.24, 0.82, 1.0, 0.14 if selected_tower_type >= 0 else 0.10)
	var fill_color := Color(0.08, 0.55, 0.72, 0.035 if selected_tower_type >= 0 else 0.025)
	for x_index in int(_active_world_width() / GRID_SIZE):
		for y_index in int(WORLD_SIZE.y / GRID_SIZE):
			var center := Vector2(x_index * GRID_SIZE + GRID_SIZE * 0.5, y_index * GRID_SIZE + GRID_SIZE * 0.5)
			if not _is_in_build_zone(center) or _is_in_reactor_zone(center):
				continue
			if _is_path_cell(center):
				continue
			var cell_line_color := line_color
			var cell_fill_color := fill_color
			if coop_mode and center.x > COOP_MIRROR_X:
				cell_line_color = Color(1.0, 0.67, 0.32, 0.16)
				cell_fill_color = Color(0.75, 0.35, 0.08, 0.025)
			var cell := Rect2(center - Vector2(34, 34), Vector2(68, 68))
			draw_rect(cell, cell_fill_color, true)
			draw_rect(cell, cell_line_color, false, 1.0)


func _draw_tower(tower: Dictionary) -> void:
	var size: float = 74.0 + (tower.level - 1) * 4.0
	if coop_mode and int(tower.get("owner", 0)) == 1:
		draw_circle(tower.pos, size * 0.54, Color(1.0, 0.56, 0.20, 0.18))
		draw_arc(tower.pos, size * 0.54, 0.0, TAU, 28, Color(1.0, 0.70, 0.34, 0.72), 2.0)
	draw_set_transform(tower.pos - camera_offset, tower.angle, Vector2.ONE)
	var destination := Rect2(-size * 0.5, -size * 0.5, size, size)
	if tower.type < 3:
		var source_width: float = TOWER_TEXTURE.get_width() / 3.0
		draw_texture_rect_region(TOWER_TEXTURE, destination, Rect2(source_width * tower.type, 0, source_width, TOWER_TEXTURE.get_height()))
	else:
		var tower_texture: Texture2D = PLASMA_TEXTURE if tower.type == 3 else (EMP_TEXTURE if tower.type == 4 else RAILGUN_TEXTURE)
		draw_texture_rect(tower_texture, destination, false)
	draw_set_transform(-camera_offset, 0.0, Vector2.ONE)
	for level_mark in tower.level:
		draw_circle(tower.pos + Vector2(-10 + level_mark * 10, 43), 3.0, Color("6cecff"))


func _draw_enemy(enemy: Dictionary) -> void:
	var enemy_type := int(enemy.type)
	var enemy_texture: Texture2D = ENEMY_TEXTURE
	var source: Rect2
	var destination: Rect2
	var size: float = ENEMY_DATA[enemy.type].size * enemy.size_scale
	if enemy_type < 3:
		var source_width: float = ENEMY_TEXTURE.get_width() / 3.0
		source = Rect2(source_width * enemy_type, 0, source_width, ENEMY_TEXTURE.get_height())
		destination = Rect2(-size * 0.5, -size * 0.5, size, size)
	else:
		enemy_texture = [ENEMY_INTERCEPTOR_TEXTURE, ENEMY_SHIELD_CARRIER_TEXTURE, ENEMY_SIEGE_DESTROYER_TEXTURE][enemy_type - 3]
		source = Rect2(Vector2.ZERO, enemy_texture.get_size())
		destination = Rect2(-size * 0.75, -size * 0.5, size * 1.5, size)
	var tint := Color.WHITE if enemy.flash <= 0.0 else Color("ffb6a3")
	if bool(enemy.get("shield", false)):
		draw_circle(enemy.pos, size * 0.63, Color(0.25, 0.80, 1.0, 0.12))
		draw_arc(enemy.pos, size * 0.63, 0.0, TAU, 28, Color(0.38, 0.86, 1.0, 0.76), 2.2)
	draw_set_transform(enemy.pos - camera_offset, enemy.angle, Vector2.ONE)
	draw_texture_rect_region(enemy_texture, destination, source, tint)
	draw_set_transform(-camera_offset, 0.0, Vector2.ONE)
	var bar_width := size * 0.72
	var ratio: float = clampf(enemy.hp / enemy.max_hp, 0.0, 1.0)
	draw_rect(Rect2(enemy.pos + Vector2(-bar_width * 0.5, -size * 0.48), Vector2(bar_width, 5)), Color("261923"))
	draw_rect(Rect2(enemy.pos + Vector2(-bar_width * 0.5, -size * 0.48), Vector2(bar_width * ratio, 5)), Color("ff6049"))
	if bool(enemy.get("shield", false)):
		draw_string(ThemeDB.fallback_font, enemy.pos + Vector2(-30, -size * 0.62), "SCHILD", HORIZONTAL_ALIGNMENT_CENTER, 60, 9, Color("75eaff"))
	if enemy.boss:
		draw_string(ThemeDB.fallback_font, enemy.pos + Vector2(-45, -size * 0.58), "KOMMANDOSCHIFF", HORIZONTAL_ALIGNMENT_CENTER, 90, 11, Color("ffab78"))


func _draw_hud() -> void:
	var font := ThemeDB.fallback_font
	draw_rect(Rect2(0, 0, 1600, 90), Color(0.015, 0.035, 0.07, 0.92))
	draw_line(Vector2(0, 90), Vector2(1600, 90), Color("2e7593"), 2.0)
	draw_string(font, Vector2(25, 35), "VOID BASTION", HORIZONTAL_ALIGNMENT_LEFT, -1, 25, Color("bcefff"))
	draw_string(font, Vector2(25, 65), "ENERGIE  %04d" % _player_credits(_local_credit_slot()), HORIZONTAL_ALIGNMENT_LEFT, -1, 20, Color("65eaff"))
	draw_string(font, Vector2(310, 52), "REAKTOR  %02d" % max(reactor_lives, 0), HORIZONTAL_ALIGNMENT_LEFT, -1, 22, Color("8feeff"))
	draw_string(font, Vector2(535, 52), "WELLE  %02d/%02d" % [wave, MAX_WAVES], HORIZONTAL_ALIGNMENT_LEFT, -1, 22, Color.WHITE)
	var partner_slot := 1 - _local_credit_slot()
	var partner_name := "PARTNER" if coop_online_mode else "KI"
	var map_label := "KOOP-ARENA  •  %s %04d EN" % [partner_name, _player_credits(partner_slot)] if coop_mode else "KARTE  %s" % MAP_NAMES[selected_map]
	draw_string(font, Vector2(715, 52), map_label, HORIZONTAL_ALIGNMENT_LEFT, -1, 15, Color("ffcf7a") if coop_mode else Color("91a8bc"))
	draw_string(font, Vector2(920, 34), _difficulty().name, HORIZONTAL_ALIGNMENT_LEFT, -1, 13, Color("ffcf7a"))
	draw_string(font, Vector2(920, 62), "KERNKRISTALLE %04d" % core_crystals, HORIZONTAL_ALIGNMENT_LEFT, -1, 14, Color("89f4ff"))
	_draw_button(back_button, "ZURÜCK", false, Color("26394a"))
	if coop_mode:
		var viewing_right := camera_offset.x > 0.0
		var viewing_own_side := (viewing_right and _local_credit_slot() == 1) or (not viewing_right and _local_credit_slot() == 0)
		var switch_label := ("< PARTNER" if viewing_right else "PARTNER >") if viewing_own_side else ("< ICH" if viewing_right else "ICH >")
		_draw_button(coop_side_button, switch_label, false, Color("604827"))
	_draw_button(speed_button, "%.0f×" % game_speed, game_speed > 1.0)
	_draw_button(pause_button, "II" if game_mode == "playing" else ">", false)
	_draw_button(wave_button, "WELLE %d STARTEN" % (wave + 1) if not wave_active else "%d IM ANFLUG" % (enemies.size() + enemies_to_spawn), wave_active)
	if tutorial_completed and ads_manager.can_offer_rewarded():
		_draw_button(reward_ad_button, "VIDEO: +150 NOTFALLENERGIE", false, Color("285044"))
	draw_rect(Rect2(0, 760, 1600, 140), Color(0.012, 0.028, 0.055, 0.97))
	draw_line(Vector2(0, 760), Vector2(1600, 760), Color("2e7593"), 2.0)
	for index in tower_buttons.size():
		_draw_tower_card(index, index, selected_tower_type == index)
	if selected_tower_index >= 0 and selected_tower_index < towers.size():
		var tower: Dictionary = towers[selected_tower_index]
		var upgrade_label := "MAX. STUFE" if tower.level >= 3 else "UPGRADE  %d" % _upgrade_cost(tower)
		_draw_button(upgrade_button, upgrade_label, false)
		_draw_button(sell_button, "VERKAUFEN", false, Color("6b3542"))
	if selected_tower_type >= 0 or selected_tower_index >= 0:
		_draw_tower_info_panel()
	draw_rect(auto_wave_button, Color("102d40"), true)
	draw_rect(auto_wave_button, Color("37677b"), false, 1.0)
	draw_rect(Rect2(auto_wave_button.position + Vector2(7, 4), Vector2(14, 14)), Color("07131f"), true)
	if auto_start_waves:
		draw_rect(Rect2(auto_wave_button.position + Vector2(10, 7), Vector2(8, 8)), Color("65eaff"), true)
	draw_string(font, auto_wave_button.position + Vector2(29, 16), "NÄCHSTE WELLE AUTO STARTEN", HORIZONTAL_ALIGNMENT_LEFT, 220, 11, Color("dceaf0"))
	if speed_dropdown_open:
		for speed_index in SPEED_OPTIONS.size():
			var option_rect := _speed_option_rect(speed_index)
			draw_rect(option_rect, Color("102d40"), true)
			draw_rect(option_rect, Color("37677b"), false, 1.0)
			draw_string(font, option_rect.position + Vector2(0, 18), "%.0f×" % SPEED_OPTIONS[speed_index], HORIZONTAL_ALIGNMENT_CENTER, option_rect.size.x, 13, Color("8ff4ff") if is_equal_approx(game_speed, SPEED_OPTIONS[speed_index]) else Color.WHITE)
	if status_timer > 0.0:
		draw_rect(Rect2(560, 108, 480, 44), Color(0.01, 0.035, 0.07, 0.88), true)
		draw_string(font, Vector2(570, 138), status_text, HORIZONTAL_ALIGNMENT_CENTER, 460, 18, Color("a9efff"))


func _speed_option_rect(index: int) -> Rect2:
	return Rect2(speed_button.position.x, speed_button.end.y + 2.0 + index * 28.0, speed_button.size.x, 27.0)


func _draw_tower_card(slot: int, type: int, active: bool) -> void:
	var rect: Rect2 = tower_buttons[slot]
	var data: Dictionary = TOWER_DATA[type]
	var font := ThemeDB.fallback_font
	var unlocked := unlocked_towers.has(type)
	draw_rect(rect, Color("226c88") if active else (Color("173c55") if unlocked else Color("102b3b")), true)
	draw_rect(rect, Color("65dfff") if active else (Color("37677b") if unlocked else Color("29485a")), false, 1.5)
	draw_string(font, rect.position + Vector2(9, 22), data.name, HORIZONTAL_ALIGNMENT_LEFT, 150, 15, Color.WHITE if unlocked else Color("9ab0ba"))
	draw_string(font, rect.position + Vector2(158, 22), "%d EN" % data.cost, HORIZONTAL_ALIGNMENT_RIGHT, 86, 12, Color("7ce7ff"))
	draw_string(font, rect.position + Vector2(9, 47), "SCH %.0f  •  %.2f SCHUSS/S" % [data.damage, _tower_shots_per_second(type, 1)], HORIZONTAL_ALIGNMENT_LEFT, 237, 11, Color("dceaf0"))
	draw_string(font, rect.position + Vector2(9, 72), "RW %.0f  •  %s" % [data.range, data.damage_type], HORIZONTAL_ALIGNMENT_LEFT, 237, 10, Color("9fdce9"))
	var hint := "ANTIPPEN • BAUPLATZ WÄHLEN" if unlocked else "GESPERRT • IM SHOP FREISCHALTEN"
	draw_string(font, rect.position + Vector2(9, 105), hint, HORIZONTAL_ALIGNMENT_LEFT, 237, 10, Color("719aaa") if unlocked else Color("ffcf7a"))


func _draw_store() -> void:
	var font := ThemeDB.fallback_font
	draw_rect(Rect2(Vector2.ZERO, SCREEN), Color(0.005, 0.015, 0.035, 0.70), true)
	_draw_button(shop_back_button, "<  ZURÜCK", false, Color("26394a"))
	draw_string(font, Vector2(0, 115), "GERGAMES-ARSENAL", HORIZONTAL_ALIGNMENT_CENTER, 1600, 42, Color("c7f5ff"))
	draw_string(font, Vector2(0, 160), "Türme und Einsatzsektoren mit Kernkristallen freischalten", HORIZONTAL_ALIGNMENT_CENTER, 1600, 18, Color("8feeff"))
	draw_string(font, Vector2(1270, 55), "KERNKRISTALLE  %04d" % core_crystals, HORIZONTAL_ALIGNMENT_RIGHT, 270, 20, Color("8ff4ff"))
	_draw_button(store_tower_tab_button, "TÜRME", store_tab == "towers", Color("24475b"))
	_draw_button(store_map_tab_button, "KARTEN", store_tab == "maps", Color("24475b"))
	if store_tab == "maps":
		for slot in map_shop_purchase_buttons.size():
			var map_index := slot + 3
			var button: Rect2 = map_shop_purchase_buttons[slot]
			var card := Rect2(button.position.x, 225, 350, 405)
			var is_unlocked := unlocked_maps.has(map_index)
			draw_rect(card, Color(0.012, 0.04, 0.07, 0.94), true)
			draw_rect(card, Color("65dfff", 0.72), false, 2.0)
			draw_texture_rect(MAP_TEXTURES[map_index], Rect2(card.position + Vector2(12, 12), Vector2(326, 176)), false)
			draw_string(font, card.position + Vector2(10, 222), MAP_NAMES[map_index], HORIZONTAL_ALIGNMENT_CENTER, 330, 17, Color("9feeff"))
			draw_string(font, card.position + Vector2(10, 250), MAP_DESCRIPTIONS[map_index], HORIZONTAL_ALIGNMENT_CENTER, 330, 13, Color("dceaf0"))
			draw_string(font, card.position + Vector2(10, 282), "80-PX-RASTER  •  DIREKTZIEL REAKTOR", HORIZONTAL_ALIGNMENT_CENTER, 330, 10, Color("8fddef"))
			var button_text := "FREIGESCHALTET" if is_unlocked else "FREISCHALTEN  •  %d KERNKRISTALLE" % int(MAP_UNLOCK_COSTS[map_index])
			_draw_button(button, button_text, is_unlocked, Color("24516a") if not is_unlocked else Color("245843"))
		draw_string(font, Vector2(0, 685), "Jeder Sektor hat einen eigenen, rastergenauen Laufweg bis in den Reaktor.", HORIZONTAL_ALIGNMENT_CENTER, 1600, 17, Color("ffcf7a"))
		return
	var textures: Array[Texture2D] = [PLASMA_TEXTURE, EMP_TEXTURE, RAILGUN_TEXTURE]
	for slot in shop_purchase_buttons.size():
		var tower_type := slot + 3
		var card := Rect2(shop_purchase_buttons[slot].position.x, 215, 360, 400)
		var data: Dictionary = TOWER_DATA[tower_type]
		draw_rect(card, Color(0.012, 0.04, 0.07, 0.94), true)
		draw_rect(card, Color(data.color, 0.72), false, 2.0)
		draw_texture_rect(textures[slot], Rect2(card.position + Vector2(112, 18), Vector2(136, 136)), false)
		draw_string(font, card.position + Vector2(20, 190), data.name, HORIZONTAL_ALIGNMENT_CENTER, 320, 23, Color(data.color))
		draw_string(font, card.position + Vector2(22, 224), "SCH %.0f  •  %.2f SCHUSS/S" % [data.damage, _tower_shots_per_second(tower_type, 1)], HORIZONTAL_ALIGNMENT_CENTER, 316, 15, Color.WHITE)
		draw_string(font, card.position + Vector2(22, 251), "RW %.0f  •  %s" % [data.range, data.damage_type], HORIZONTAL_ALIGNMENT_CENTER, 316, 14, Color("9fdce9"))
		draw_string(font, card.position + Vector2(22, 295), data.description, HORIZONTAL_ALIGNMENT_CENTER, 316, 14, Color("c4d7df"))
		var is_unlocked := unlocked_towers.has(tower_type)
		var button_text := "FREIGESCHALTET" if is_unlocked else "FREISCHALTEN  •  %d KERNKRISTALLE" % int(data.unlock_cost)
		_draw_button(shop_purchase_buttons[slot], button_text, is_unlocked, Color("24516a") if not is_unlocked else Color("245843"))
	draw_string(font, Vector2(0, 685), "Weitere Verteidigungen lassen sich dauerhaft mit Kernkristallen freischalten.", HORIZONTAL_ALIGNMENT_CENTER, 1600, 18, Color("ffcf7a"))


func _draw_tower_info_panel() -> void:
	var type := selected_tower_type
	var level := 1
	var is_built := selected_tower_index >= 0 and selected_tower_index < towers.size()
	if is_built:
		var tower: Dictionary = towers[selected_tower_index]
		type = tower.type
		level = tower.level
	if type < 0:
		return
	var data: Dictionary = TOWER_DATA[type]
	var font := ThemeDB.fallback_font
	draw_rect(tower_info_rect, Color(0.008, 0.028, 0.055, 0.58), true)
	draw_rect(tower_info_rect, Color(0.29, 0.60, 0.70, 0.72), false, 1.5)
	var heading := "%s  •  STUFE %d" % [data.name, level] if is_built else "%s  •  BAUVORSCHAU" % data.name
	draw_string(font, tower_info_rect.position + Vector2(10, 20), heading, HORIZONTAL_ALIGNMENT_LEFT, 280, 13, Color("a9efff"))
	draw_string(font, tower_info_rect.position + Vector2(10, 41), "SCH %.0f  •  %.2f/S  •  RW %.0f" % [_tower_damage(type, level), _tower_shots_per_second(type, level), _tower_range(type, level)], HORIZONTAL_ALIGNMENT_LEFT, 280, 10, Color.WHITE)
	if is_built and level < 3:
		var next_level := level + 1
		draw_string(font, tower_info_rect.position + Vector2(10, 62), "UPGRADE  +%.0f SCH  +%.2f/S  +%.0f RW" % [_tower_damage(type, next_level) - _tower_damage(type, level), _tower_shots_per_second(type, next_level) - _tower_shots_per_second(type, level), _tower_range(type, next_level) - _tower_range(type, level)], HORIZONTAL_ALIGNMENT_LEFT, 280, 9, Color("84ffca"))
	elif is_built:
		draw_string(font, tower_info_rect.position + Vector2(10, 62), "MAXIMALE AUSBAUSTUFE", HORIZONTAL_ALIGNMENT_LEFT, 280, 9, Color("84ffca"))
	else:
		draw_string(font, tower_info_rect.position + Vector2(10, 62), str(data.damage_type), HORIZONTAL_ALIGNMENT_LEFT, 280, 9, Color("84ffca"))


func _draw_button(rect: Rect2, text: String, active: bool, base := Color("173c55")) -> void:
	var font := ThemeDB.fallback_font
	var color: Color = Color("226c88") if active else base
	draw_rect(rect, color, true)
	draw_rect(rect, Color("65dfff") if active else Color("37677b"), false, 2.0)
	var lines := text.split("\n")
	if lines.size() == 1:
		draw_string(font, rect.position + Vector2(0, rect.size.y * 0.62), lines[0], HORIZONTAL_ALIGNMENT_CENTER, rect.size.x, 17, Color.WHITE)
	else:
		draw_string(font, rect.position + Vector2(0, 28), lines[0], HORIZONTAL_ALIGNMENT_CENTER, rect.size.x, 18, Color.WHITE)
		draw_string(font, rect.position + Vector2(0, 54), lines[1], HORIZONTAL_ALIGNMENT_CENTER, rect.size.x, 14, Color("7ce7ff"))


func _draw_menu() -> void:
	var font := ThemeDB.fallback_font
	draw_rect(Rect2(Vector2.ZERO, SCREEN), Color(0.005, 0.015, 0.035, 0.52))
	draw_string(font, Vector2(0, 145), "VOID BASTION", HORIZONTAL_ALIGNMENT_CENTER, 1600, 64, Color("c7f5ff"))
	draw_string(font, Vector2(0, 202), "ORBITAL DEFENSE PROTOCOL", HORIZONTAL_ALIGNMENT_CENTER, 1600, 23, Color("56cce9"))
	_draw_button(profile_button, "%s  •  PROFIL" % account_manager.display_name, false, Color("233f57"))
	if menu_step == "map":
		draw_string(font, Vector2(0, 300), "EINSATZKARTE WÄHLEN  •  GESPERRTE SEKTOREN IM SHOP FREISCHALTEN", HORIZONTAL_ALIGNMENT_CENTER, 1600, 20, Color("8feeff"))
		for index in map_buttons.size():
			var card: Rect2 = map_buttons[index]
			var map_index := index
			var is_unlocked := unlocked_maps.has(map_index)
			draw_texture_rect(MAP_TEXTURES[map_index], card, false, Color(0.82, 0.88, 0.94, 1.0) if is_unlocked else Color(0.38, 0.46, 0.54, 1.0))
			draw_rect(card, Color(0.005, 0.015, 0.035, 0.22 if is_unlocked else 0.48), true)
			draw_rect(card, Color("70eaff") if selected_map == map_index and is_unlocked else Color("436574"), false, 4.0 if selected_map == map_index and is_unlocked else 2.0)
			var footer_y := card.size.y - 52.0
			draw_rect(Rect2(card.position + Vector2(0, footer_y), Vector2(card.size.x, 52)), Color(0.01, 0.025, 0.05, 0.88), true)
			draw_string(font, card.position + Vector2(0, footer_y + 21), MAP_NAMES[map_index], HORIZONTAL_ALIGNMENT_CENTER, card.size.x, 14, Color.WHITE)
			var description: String = MAP_DESCRIPTIONS[map_index] if is_unlocked else "GESPERRT  •  %d KERNKRISTALLE" % int(MAP_UNLOCK_COSTS[map_index])
			draw_string(font, card.position + Vector2(0, footer_y + 42), description, HORIZONTAL_ALIGNMENT_CENTER, card.size.x, 11, Color("8fddef") if is_unlocked else Color("ffcf7a"))
		draw_string(font, Vector2(0, 720), "Wähle einen Sektor, um Schwierigkeit und Missionsstart festzulegen.", HORIZONTAL_ALIGNMENT_CENTER, 1600, 16, Color("d7e2ea"))
	else:
		_draw_button(map_step_back_button, "<  KARTE", false, Color("26394a"))
		var selected_card := Rect2(500, 315, 600, 145)
		draw_texture_rect(MAP_TEXTURES[selected_map], selected_card, false, Color(0.86, 0.90, 0.95, 1.0))
		draw_rect(selected_card, Color(0.005, 0.015, 0.035, 0.34), true)
		draw_rect(selected_card, Color("70eaff"), false, 3.0)
		draw_rect(Rect2(selected_card.position + Vector2(0, 92), Vector2(selected_card.size.x, 53)), Color(0.01, 0.025, 0.05, 0.88), true)
		draw_string(font, selected_card.position + Vector2(0, 116), MAP_NAMES[selected_map], HORIZONTAL_ALIGNMENT_CENTER, selected_card.size.x, 18, Color.WHITE)
		draw_string(font, selected_card.position + Vector2(0, 138), MAP_DESCRIPTIONS[selected_map], HORIZONTAL_ALIGNMENT_CENTER, selected_card.size.x, 13, Color("8fddef"))
		draw_string(font, Vector2(0, 490), "SCHWIERIGKEIT WÄHLEN", HORIZONTAL_ALIGNMENT_CENTER, 1600, 18, Color("9fdce9"))
		for index in difficulty_buttons.size():
			_draw_button(difficulty_buttons[index], DIFFICULTY_DATA[index].name, selected_difficulty == index, Color("27394d"))
		draw_string(font, Vector2(0, 603), DIFFICULTY_DESCRIPTIONS[selected_difficulty], HORIZONTAL_ALIGNMENT_CENTER, 1600, 14, Color("ffcf7a"))
		_draw_button(start_button, "MISSION STARTEN", false, Color("18556f"))
		draw_string(font, Vector2(0, 755), "KARTENBONUS %d  •  BESTE WELLE %02d  •  KERNKRISTALLE %04d" % [int(_difficulty().crystals), best_wave, core_crystals], HORIZONTAL_ALIGNMENT_CENTER, 1600, 15, Color("86c8d8"))
	_draw_button(leaderboard_button, "BESTENLISTE", false, Color("24475b"))
	_draw_button(multiplayer_button, "MULTIPLAYER", false, Color("254f75"))
	_draw_button(shop_button, "ARSENAL / SHOP", false, Color("24516a"))
	_draw_button(audio_settings_button, "EINSTELLUNGEN", false, Color("24516a"))
	_draw_button(exit_button, "SPIEL BEENDEN", false, Color("5c3342"))
	draw_string(font, Vector2(0, 860), "VERSION %s  •  GERGAMES-ONLINEKONTO  •  GLOBALE BESTENLISTEN" % _app_version(), HORIZONTAL_ALIGNMENT_CENTER, 1600, 14, Color("688293"))
	if update_notice_visible:
		_draw_button(update_button, "UPDATE %s VERFÜGBAR" % str(available_update.get("version", "")), true, Color("1f5d4d"))
		_draw_button(update_dismiss_button, "×", false, Color("3d4650"))


func _draw_audio_settings() -> void:
	var font := ThemeDB.fallback_font
	draw_rect(Rect2(Vector2.ZERO, SCREEN), Color(0.002, 0.008, 0.02, 0.62), true)
	draw_rect(audio_panel_rect, Color(0.01, 0.035, 0.065, 0.98), true)
	draw_rect(audio_panel_rect, Color("4ab8d1"), false, 2.0)
	draw_string(font, audio_panel_rect.position + Vector2(30, 54), "AUDIOEINSTELLUNGEN", HORIZONTAL_ALIGNMENT_LEFT, 450, 25, Color("bcefff"))
	_draw_button(audio_close_button, "SCHLIESSEN", false, Color("26394a"))
	draw_string(font, Vector2(audio_slider_rect.position.x, audio_slider_rect.position.y - 18), "MASTER-LAUTSTÄRKE", HORIZONTAL_ALIGNMENT_LEFT, 260, 16, Color("dceaf0"))
	draw_string(font, Vector2(audio_slider_rect.end.x - 80, audio_slider_rect.position.y - 18), "%d%%" % roundi(master_volume * 100.0), HORIZONTAL_ALIGNMENT_RIGHT, 80, 16, Color("8ff4ff"))
	var track := Rect2(audio_slider_rect.position.x, audio_slider_rect.position.y + 13, audio_slider_rect.size.x, 6)
	draw_rect(track, Color("24475b"), true)
	draw_rect(Rect2(track.position, Vector2(track.size.x * master_volume, track.size.y)), Color("45d4ee"), true)
	var knob_position := Vector2(track.position.x + track.size.x * master_volume, track.position.y + track.size.y * 0.5)
	draw_circle(knob_position, 13, Color("0b1d2c"))
	draw_circle(knob_position, 9, Color("8ff4ff"))
	draw_string(font, Vector2(audio_panel_rect.position.x + 30, audio_panel_rect.end.y - 28), "Die Einstellung wird automatisch gespeichert.", HORIZONTAL_ALIGNMENT_LEFT, audio_panel_rect.size.x - 60, 13, Color("91a8bc"))


func _draw_leaderboard() -> void:
	var font := ThemeDB.fallback_font
	draw_rect(Rect2(Vector2.ZERO, SCREEN), Color(0.005, 0.015, 0.035, 0.84))
	_draw_button(leaderboard_back_button, "<  ZURÜCK", false, Color("26394a"))
	_draw_button(leaderboard_refresh_button, "AKTUALISIEREN", leaderboard_loading, Color("24516a"))
	draw_string(font, Vector2(0, 108), "GLOBALE BESTENLISTE", HORIZONTAL_ALIGNMENT_CENTER, 1600, 42, Color("c7f5ff"))
	_draw_button(leaderboard_map_previous_button, "<", false, Color("26394a"))
	_draw_button(leaderboard_map_button, "KARTE  •  %s" % MAP_NAMES[leaderboard_map], true, Color("24475b"))
	_draw_button(leaderboard_map_next_button, ">", false, Color("26394a"))
	_draw_button(leaderboard_difficulty_previous_button, "<", false, Color("26394a"))
	_draw_button(leaderboard_difficulty_button, "STUFE  •  %s" % DIFFICULTY_DATA[leaderboard_difficulty].name, true, Color("5b452b"))
	_draw_button(leaderboard_difficulty_next_button, ">", false, Color("26394a"))
	_draw_button(leaderboard_mission_button, "MISSION", not leaderboard_endless, Color("24475b"))
	_draw_button(leaderboard_endless_button, "ENDLOSMODUS", leaderboard_endless, Color("5b452b"))
	var panel := Rect2(205, 280, 1190, 505)
	draw_rect(panel, Color(0.012, 0.035, 0.065, 0.96), true)
	draw_rect(panel, Color("39788e"), false, 2.0)
	draw_string(font, Vector2(235, 319), "RANG", HORIZONTAL_ALIGNMENT_LEFT, 75, 13, Color("91a8bc"))
	draw_string(font, Vector2(325, 319), "PILOT", HORIZONTAL_ALIGNMENT_LEFT, 270, 13, Color("91a8bc"))
	draw_string(font, Vector2(610, 319), "KARTE", HORIZONTAL_ALIGNMENT_LEFT, 240, 13, Color("91a8bc"))
	draw_string(font, Vector2(850, 319), "STUFE", HORIZONTAL_ALIGNMENT_LEFT, 130, 13, Color("91a8bc"))
	draw_string(font, Vector2(995, 319), "WELLE", HORIZONTAL_ALIGNMENT_CENTER, 110, 13, Color("91a8bc"))
	draw_string(font, Vector2(1160, 319), "PUNKTE", HORIZONTAL_ALIGNMENT_RIGHT, 190, 13, Color("91a8bc"))
	draw_line(Vector2(230, 334), Vector2(1370, 334), Color("315c70"), 1.0)
	var own_user_id: String = str(online_manager.session.user_id) if online_manager.session != null else ""
	for index in leaderboard_rows.size():
		var row: Dictionary = leaderboard_rows[index]
		var y := 370.0 + index * 32.0
		if index % 2 == 0:
			draw_rect(Rect2(225, y - 23, 1150, 29), Color(0.03, 0.09, 0.14, 0.64), true)
		var owner_color := Color("83ffc8") if not own_user_id.is_empty() and str(row.get("owner_id", "")) == own_user_id else Color.WHITE
		draw_string(font, Vector2(240, y), "%02d" % int(row.get("rank", index + 1)), HORIZONTAL_ALIGNMENT_LEFT, 65, 14, Color("8ff4ff"))
		draw_string(font, Vector2(325, y), str(row.get("username", "PILOT")).to_upper(), HORIZONTAL_ALIGNMENT_LEFT, 270, 14, owner_color)
		draw_string(font, Vector2(610, y), MAP_NAMES[int(row.get("map", leaderboard_map))], HORIZONTAL_ALIGNMENT_LEFT, 225, 13, Color("9fdce9"))
		draw_string(font, Vector2(850, y), DIFFICULTY_DATA[int(row.get("difficulty", leaderboard_difficulty))].name, HORIZONTAL_ALIGNMENT_LEFT, 130, 13, Color("ffcf7a"))
		draw_string(font, Vector2(995, y), "%02d" % int(row.get("wave", 0)), HORIZONTAL_ALIGNMENT_CENTER, 110, 14, Color("ffcf7a"))
		draw_string(font, Vector2(1160, y), "%09d" % int(row.get("score", 0)), HORIZONTAL_ALIGNMENT_RIGHT, 190, 14, Color("8fffea"))
	if not leaderboard_message.is_empty():
		draw_string(font, Vector2(300, 520), leaderboard_message, HORIZONTAL_ALIGNMENT_CENTER, 1000, 17, Color("ffcf7a"))
	draw_string(font, Vector2(0, 810), "Spielernamen werden aus dem aktuellen öffentlichen Profil geladen.", HORIZONTAL_ALIGNMENT_CENTER, 1600, 14, Color("91a8bc"))
	draw_string(font, Vector2(0, 838), "WERTUNG: WELLEN + REAKTORREST + RESTENERGIE  •  WENIGER GEBAUTE TÜRME ERHÖHEN DEN EFFIZIENZ-MULTIPLIKATOR", HORIZONTAL_ALIGNMENT_CENTER, 1600, 12, Color("75aaba"))


func _draw_multiplayer_menu() -> void:
	var font := ThemeDB.fallback_font
	draw_rect(Rect2(Vector2.ZERO, SCREEN), Color(0.005, 0.015, 0.035, 0.78))
	_draw_button(multiplayer_back_button, "<  ZURÜCK", false, Color("26394a"))
	draw_string(font, Vector2(0, 105), "KOOPERATIVE VERTEIDIGUNG", HORIZONTAL_ALIGNMENT_CENTER, 1600, 42, Color("c7f5ff"))
	draw_string(font, Vector2(0, 142), "ZWEI KOMMANDANTEN  •  EIN GEMEINSAMER REAKTOR", HORIZONTAL_ALIGNMENT_CENTER, 1600, 17, Color("66dff3"))
	var arena := Rect2(170, 180, 1260, 410)
	draw_rect(arena, Color(0.01, 0.04, 0.075, 0.96), true)
	draw_rect(arena, Color("39788e"), false, 2.0)
	draw_line(Vector2(800, 200), Vector2(800, 570), Color(0.35, 0.82, 1.0, 0.24), 2.0)
	_draw_coop_lane_preview(false)
	_draw_coop_lane_preview(true)
	for radius in [66.0, 48.0, 30.0]:
		draw_arc(Vector2(800, 385), radius, 0.0, TAU, 48, Color(0.25, 0.92, 1.0, 0.78), 3.0)
	draw_circle(Vector2(800, 385), 18.0, Color("8ffaff"))
	draw_string(font, Vector2(665, 490), "GEMEINSAMER REAKTOR", HORIZONTAL_ALIGNMENT_CENTER, 270, 15, Color("8ff4ff"))
	draw_string(font, Vector2(215, 225), "%s  •  ENERGIE %d" % [account_manager.display_name, multiplayer_manager.player_credits[0]], HORIZONTAL_ALIGNMENT_LEFT, 440, 17, Color("8ff4ff"))
	draw_string(font, Vector2(945, 225), "MITSPIELER  •  ENERGIE %d" % multiplayer_manager.player_credits[1], HORIZONTAL_ALIGNMENT_RIGHT, 440, 17, Color("ffcf7a"))
	draw_string(font, Vector2(570, 555), "REAKTORLEBEN  %02d  •  GETRENNTE RESSOURCEN" % multiplayer_manager.shared_reactor_lives, HORIZONTAL_ALIGNMENT_CENTER, 460, 16, Color.WHITE)
	_draw_button(quick_match_button, "SCHNELLES SPIEL", false, Color("185f68"))
	_draw_button(friend_match_button, "RAUM BEITRETEN", false, Color("254f75"))
	_draw_button(private_match_button, "RAUM ERSTELLEN", false, Color("493f67"))
	_draw_button(ai_match_button, "MIT KI-PARTNER", false, Color("6b4b28"))
	var service_text := "GERGAMES-SERVER VERBUNDEN  •  ONLINE-KOOP IST SPIELBEREIT" if online_manager.is_online() else "VERBINDUNG ZUM GERGAMES-SERVER WIRD AUTOMATISCH AUFGEBAUT"
	var service_color := Color("83ffc8") if online_manager.is_online() else Color("ffcf7a")
	draw_string(font, Vector2(0, 770), service_text, HORIZONTAL_ALIGNMENT_CENTER, 1600, 15, service_color)


func _draw_room_code_entry() -> void:
	var font := ThemeDB.fallback_font
	draw_rect(Rect2(Vector2.ZERO, SCREEN), Color(0.005, 0.015, 0.035, 0.88))
	_draw_button(multiplayer_back_button, "<  ZURÜCK", false, Color("26394a"))
	draw_string(font, Vector2(0, 205), "PRIVATEN RAUM BEITRETEN", HORIZONTAL_ALIGNMENT_CENTER, 1600, 42, Color("c7f5ff"))
	draw_string(font, Vector2(0, 260), "GIB DEN SECHSSTELLIGEN CODE DEINES MITPILOTEN EIN", HORIZONTAL_ALIGNMENT_CENTER, 1600, 17, Color("66dff3"))
	draw_rect(room_code_input_rect, Color(0.01, 0.035, 0.065, 0.98), true)
	draw_rect(room_code_input_rect, Color("65eaff") if room_code_input.length() == 6 else Color("39788e"), false, 3.0)
	var shown_code := room_code_input
	if shown_code.is_empty():
		shown_code = "------"
	draw_string(font, Vector2(room_code_input_rect.position.x, room_code_input_rect.position.y + 61), "  ".join(shown_code.split("")), HORIZONTAL_ALIGNMENT_CENTER, room_code_input_rect.size.x, 38, Color("8ffaff") if not room_code_input.is_empty() else Color("688293"))
	draw_string(font, Vector2(0, 470), "BUCHSTABEN UND ZAHLEN  •  GROSS-/KLEINSCHREIBUNG IST EGAL", HORIZONTAL_ALIGNMENT_CENTER, 1600, 14, Color("9fdce9"))
	_draw_button(join_room_button, "RAUM BEITRETEN", room_code_input.length() == 6, Color("185f68") if room_code_input.length() == 6 else Color("26394a"))


func _draw_coop_lane_preview(mirrored: bool) -> void:
	var points := PackedVector2Array([Vector2(205, 300), Vector2(505, 300), Vector2(505, 385), Vector2(720, 385)])
	if mirrored:
		points = multiplayer_manager.mirrored_path(points, 1600.0)
	for index in points.size() - 1:
		draw_line(points[index], points[index + 1], Color(0.18, 0.34, 0.42, 0.95), 54.0, true)
		draw_line(points[index], points[index + 1], Color(0.52, 0.82, 0.88, 0.42), 2.0, true)
	for index in 5:
		var x := 300.0 + index * 78.0
		if mirrored:
			x = 1600.0 - x
		draw_rect(Rect2(Vector2(x - 27, 465), Vector2(54, 54)), Color(0.08, 0.42, 0.55, 0.12), true)
		draw_rect(Rect2(Vector2(x - 27, 465), Vector2(54, 54)), Color(0.28, 0.72, 0.82, 0.36), false, 1.0)


func _draw_matchmaking() -> void:
	var font := ThemeDB.fallback_font
	draw_rect(Rect2(Vector2.ZERO, SCREEN), Color(0.005, 0.015, 0.035, 0.88))
	_draw_button(multiplayer_back_button, "<  ZURÜCK", false, Color("26394a"))
	var private_mode: bool = multiplayer_manager.matchmaking_mode in ["private_host", "private_join"]
	draw_string(font, Vector2(0, 210), "PRIVATER KOOP-RAUM" if private_mode else "MITSPIELERSUCHE", HORIZONTAL_ALIGNMENT_CENTER, 1600, 46, Color("c7f5ff"))
	var in_lobby: bool = multiplayer_manager.player_slot >= 0 and multiplayer_manager.matchmaking_state in ["hosting", "matched", "lobby", "reconnected"]
	if in_lobby:
		_draw_online_lobby_players(font)
	else:
		var pulse := 56.0 + sin(elapsed * 3.0) * 8.0
		draw_arc(Vector2(800, 390), pulse, -PI * 0.2, PI * 1.45, 52, Color("65eaff"), 5.0)
		draw_circle(Vector2(800, 390), 22.0, Color("8ffaff"))
	var mode_labels := {"quick": "SCHNELLES SPIEL", "private_host": "RAUM ERSTELLEN", "private_join": "RAUM BEITRETEN"}
	var mode_text: String = mode_labels.get(multiplayer_manager.matchmaking_mode, "KOOP-SPIEL")
	if not multiplayer_manager.private_room_code.is_empty():
		mode_text = "RAUMCODE   %s" % "  ".join(multiplayer_manager.private_room_code.split(""))
	draw_string(font, Vector2(0, 500), mode_text, HORIZONTAL_ALIGNMENT_CENTER, 1600, 23, Color.WHITE)
	if in_lobby:
		_draw_button(lobby_ready_button, "NICHT BEREIT" if multiplayer_manager.local_ready else "BEREIT", multiplayer_manager.local_ready, Color("8b6330") if multiplayer_manager.local_ready else Color("185f68"))
	_draw_button(cancel_search_button, "ZURÜCK" if multiplayer_manager.matchmaking_state == "room_not_found" else "SUCHE ABBRECHEN", false, Color("5c3342"))
	var online_text := "ONLINE  •  SUCHE NACH EINEM MITPILOTEN"
	var online_color := Color("83ffc8")
	if multiplayer_manager.matchmaking_state == "waiting_for_service":
		online_text = "VERBINDUNG ZUM GERGAMES-SERVER WIRD AUFGEBAUT …"
		online_color = Color("ffcf7a")
	elif multiplayer_manager.matchmaking_state == "offline":
		online_text = "SERVER NOCH NICHT ERREICHBAR  •  BITTE SPÄTER ERNEUT VERSUCHEN"
		online_color = Color("ff8e8e")
	elif multiplayer_manager.matchmaking_state == "matched":
		online_text = "MITPILOT GEFUNDEN  •  WÄHLE BEREIT"
		online_color = Color("8ffaff")
	elif multiplayer_manager.matchmaking_state in ["lobby", "reconnected"]:
		online_text = "BEIDE SPIELER MÜSSEN BEREIT SEIN"
		online_color = Color("8ffaff")
	elif multiplayer_manager.matchmaking_state == "reconnecting":
		online_text = "VERBINDUNG WIRD WIEDERHERGESTELLT ."
		online_color = Color("ffcf7a")
	elif multiplayer_manager.matchmaking_state == "connection_lost":
		online_text = "VERBINDUNG VERLOREN  •  BITTE ZURÜCKKEHREN"
		online_color = Color("ff8e8e")
	elif multiplayer_manager.matchmaking_state == "creating_room":
		online_text = "PRIVATER RAUM WIRD ERSTELLT ."
		online_color = Color("ffcf7a")
	elif multiplayer_manager.matchmaking_state == "hosting":
		online_text = "TEILE DEN RAUMCODE MIT DEINEM MITPILOTEN  •  WARTE AUF BEITRITT"
		online_color = Color("83ffc8")
	elif multiplayer_manager.matchmaking_state == "joining_room":
		online_text = "PRIVATER RAUM WIRD GESUCHT ."
		online_color = Color("ffcf7a")
	elif multiplayer_manager.matchmaking_state == "room_not_found":
		online_text = "RAUM NICHT GEFUNDEN ODER BEREITS VOLL"
		online_color = Color("ff8e8e")
	draw_rect(Rect2(180, 520, 1240, 44), Color(0.005, 0.015, 0.035, 0.98), true)
	draw_string(font, Vector2(0, 548), online_text, HORIZONTAL_ALIGNMENT_CENTER, 1600, 16, online_color)


func _draw_online_lobby_players(font: Font) -> void:
	for slot in 2:
		var rect := Rect2(270 + slot * 560, 285, 500, 130)
		var player = multiplayer_manager.lobby_players[slot] if slot < multiplayer_manager.lobby_players.size() else null
		var occupied: bool = player is Dictionary
		var connected: bool = occupied and bool(player.get("connected", false))
		var ready: bool = occupied and bool(player.get("ready", false))
		var border := Color("5de8a8") if ready else (Color("65eaff") if connected else Color("425567"))
		draw_rect(rect, Color(0.012, 0.035, 0.065, 0.96), true)
		draw_rect(rect, border, false, 3.0)
		var name := String(player.get("name", "PILOT")) if occupied else "WARTE AUF MITPILOTEN"
		var side := "LINKE VERTEIDIGUNG" if slot == 0 else "RECHTE VERTEIDIGUNG"
		var state := "BEREIT" if ready else ("NICHT BEREIT" if connected else "NICHT VERBUNDEN")
		draw_string(font, Vector2(rect.position.x + 24, rect.position.y + 43), name.to_upper(), HORIZONTAL_ALIGNMENT_LEFT, rect.size.x - 48, 24, Color("e8fbff"))
		draw_string(font, Vector2(rect.position.x + 24, rect.position.y + 78), side, HORIZONTAL_ALIGNMENT_LEFT, rect.size.x - 48, 14, Color("8fcddd"))
		draw_string(font, Vector2(rect.position.x + 24, rect.position.y + 108), state, HORIZONTAL_ALIGNMENT_LEFT, rect.size.x - 48, 16, border)


func _draw_profile() -> void:
	var font := ThemeDB.fallback_font
	draw_rect(Rect2(Vector2.ZERO, SCREEN), Color(0.005, 0.015, 0.035, 0.76))
	_draw_button(profile_back_button, "<  ZURÜCK", false, Color("26394a"))
	draw_string(font, Vector2(0, 112), "PILOTENPROFIL", HORIZONTAL_ALIGNMENT_CENTER, 1600, 44, Color("c7f5ff"))
	draw_string(font, Vector2(1110, 112), "VERSION %s" % _app_version(), HORIZONTAL_ALIGNMENT_RIGHT, 290, 14, Color("91a8bc"))
	draw_rect(Rect2(170, 155, 1260, 600), Color(0.012, 0.035, 0.065, 0.94), true)
	draw_rect(Rect2(170, 155, 1260, 600), Color("4ab8d1"), false, 2.0)
	draw_string(font, Vector2(220, 220), account_manager.display_name, HORIZONTAL_ALIGNMENT_LEFT, 520, 30, Color("8ff4ff"))
	draw_string(font, Vector2(220, 258), account_manager.provider_label(), HORIZONTAL_ALIGNMENT_LEFT, 650, 16, Color("ffcf7a"))
	draw_string(font, Vector2(220, 292), "SPIELER-ID  %s" % account_manager.short_id(), HORIZONTAL_ALIGNMENT_LEFT, 650, 14, Color("91a8bc"))
	_draw_button(profile_rename_button, "SPIELERNAME ÄNDERN", false, Color("24516a"))
	draw_string(font, Vector2(840, 215), "KONTO & CLOUD", HORIZONTAL_ALIGNMENT_LEFT, 470, 18, Color("8feeff"))
	var cloud_label := "GERGAMES ONLINE          VERBUNDEN" if online_manager.is_authenticated() else "GERGAMES ONLINE          OFFLINE"
	var cloud_color := Color("83ffc8") if online_manager.is_authenticated() else Color("ffcf7a")
	draw_string(font, Vector2(840, 252), cloud_label, HORIZONTAL_ALIGNMENT_LEFT, 470, 15, cloud_color)
	draw_string(font, Vector2(840, 282), "GAME CENTER / APPLE      NÄCHSTE STUFE", HORIZONTAL_ALIGNMENT_LEFT, 470, 15, Color("d7e2ea"))
	draw_string(font, Vector2(840, 312), "GOOGLE PLAY GAMES        NÄCHSTE STUFE", HORIZONTAL_ALIGNMENT_LEFT, 470, 15, Color("d7e2ea"))
	draw_line(Vector2(220, 345), Vector2(1380, 345), Color("315c70"), 1.0)
	draw_string(font, Vector2(220, 392), "LOKALE BESTWERTE", HORIZONTAL_ALIGNMENT_LEFT, 1160, 20, Color("8feeff"))
	draw_string(font, Vector2(220, 430), "EINSATZSEKTOR", HORIZONTAL_ALIGNMENT_LEFT, 420, 14, Color("91a8bc"))
	draw_string(font, Vector2(700, 430), "MISSION", HORIZONTAL_ALIGNMENT_CENTER, 180, 14, Color("91a8bc"))
	draw_string(font, Vector2(930, 430), "ENDLOS", HORIZONTAL_ALIGNMENT_CENTER, 180, 14, Color("91a8bc"))
	draw_string(font, Vector2(1160, 430), "BESTE PUNKTE", HORIZONTAL_ALIGNMENT_CENTER, 180, 14, Color("91a8bc"))
	for index in MAP_NAMES.size():
		var y := 466.0 + index * 28.0
		draw_rect(Rect2(210, y - 19, 1180, 25), Color(0.03, 0.09, 0.14, 0.70), true)
		draw_string(font, Vector2(235, y), MAP_NAMES[index], HORIZONTAL_ALIGNMENT_LEFT, 420, 12, Color.WHITE)
		draw_string(font, Vector2(700, y), "WELLE %02d" % account_manager.get_map_best_wave(index, false), HORIZONTAL_ALIGNMENT_CENTER, 180, 12, Color("8ff4ff"))
		draw_string(font, Vector2(930, y), "WELLE %02d" % account_manager.get_map_best_wave(index, true), HORIZONTAL_ALIGNMENT_CENTER, 180, 12, Color("ffcf7a"))
		var score := maxi(account_manager.get_map_best_score(index, false), account_manager.get_map_best_score(index, true))
		draw_string(font, Vector2(1160, y), "%07d" % score, HORIZONTAL_ALIGNMENT_CENTER, 180, 12, Color("8fffea"))
	if not profile_message.is_empty():
		draw_string(font, Vector2(220, 658), profile_message, HORIZONTAL_ALIGNMENT_CENTER, 1160, 14, Color("ffcf7a"))
	_draw_button(profile_support_button, "SUPPORT / FEEDBACK", false, Color("24516a"))
	_draw_button(profile_privacy_button, "DATENSCHUTZ", false, Color("24475b"))
	_draw_button(profile_delete_button, "LÖSCHEN BESTÄTIGEN" if profile_delete_armed else "KONTO LÖSCHEN", profile_delete_armed, Color("6b2d3b"))


func _draw_profile_name_entry() -> void:
	var font := ThemeDB.fallback_font
	draw_rect(Rect2(Vector2.ZERO, SCREEN), Color(0.005, 0.015, 0.035, 0.82))
	_draw_button(profile_back_button, "<  ZURÜCK", false, Color("26394a"))
	draw_string(font, Vector2(0, 190), "SPIELERNAME", HORIZONTAL_ALIGNMENT_CENTER, 1600, 44, Color("c7f5ff"))
	draw_string(font, Vector2(0, 250), "Dieser Name ist für Mitspieler und in Ranglisten sichtbar.", HORIZONTAL_ALIGNMENT_CENTER, 1600, 18, Color("a9d8e5"))
	draw_rect(profile_name_input_rect, Color(0.012, 0.035, 0.065, 0.96), true)
	draw_rect(profile_name_input_rect, Color("65dfff"), false, 3.0)
	draw_string(font, profile_name_input_rect.position + Vector2(24, 53), profile_name_input, HORIZONTAL_ALIGNMENT_CENTER, profile_name_input_rect.size.x - 48, 26, Color.WHITE)
	draw_string(font, Vector2(0, 448), "3–20 Zeichen · Buchstaben, Zahlen, Leerzeichen, _ und -", HORIZONTAL_ALIGNMENT_CENTER, 1600, 15, Color("91a8bc"))
	_draw_button(profile_name_save_button, "SPIELERNAME SPEICHERN", false, Color("185f68"))
	if not profile_message.is_empty():
		draw_string(font, Vector2(300, 585), profile_message, HORIZONTAL_ALIGNMENT_CENTER, 1000, 16, Color("ffcf7a"))


func _draw_overlay(title: String, subtitle: String) -> void:
	var font := ThemeDB.fallback_font
	draw_rect(Rect2(Vector2.ZERO, SCREEN), Color(0.0, 0.01, 0.03, 0.72))
	draw_string(font, Vector2(0, 390), title, HORIZONTAL_ALIGNMENT_CENTER, 1600, 54, Color.WHITE)
	draw_string(font, Vector2(0, 445), subtitle, HORIZONTAL_ALIGNMENT_CENTER, 1600, 19, Color("8adff2"))


func _draw_game_over() -> void:
	var font := ThemeDB.fallback_font
	draw_rect(Rect2(Vector2.ZERO, SCREEN), Color(0.05, 0.005, 0.015, 0.76))
	draw_string(font, Vector2(0, 330), "REAKTOR VERLOREN", HORIZONTAL_ALIGNMENT_CENTER, 1600, 48, Color("ff8b78"))
	draw_string(font, Vector2(0, 395), "Erreichte Welle: %d" % wave, HORIZONTAL_ALIGNMENT_CENTER, 1600, 22, Color.WHITE)
	draw_string(font, Vector2(0, 430), "Highscore: %d  •  Effizienzbonus: ×%.2f" % [_calculate_run_score(), clampf(1.0 + (10.0 - towers_built_this_run) * 0.05, 0.50, 1.50)], HORIZONTAL_ALIGNMENT_CENTER, 1600, 15, Color("d6eaf0"))
	_draw_button(start_button, "NEUER VERSUCH", false, Color("6a2835"))


func _draw_victory() -> void:
	var font := ThemeDB.fallback_font
	draw_rect(Rect2(Vector2.ZERO, SCREEN), Color(0.0, 0.035, 0.05, 0.82))
	draw_string(font, Vector2(0, 310), "SEKTOR GESICHERT", HORIZONTAL_ALIGNMENT_CENTER, 1600, 50, Color("8fffea"))
	draw_string(font, Vector2(0, 375), "Alle %d Angriffswellen wurden abgewehrt." % MAX_WAVES, HORIZONTAL_ALIGNMENT_CENTER, 1600, 22, Color.WHITE)
	draw_string(font, Vector2(0, 415), "Der Orbitalkern bleibt unter unserer Kontrolle.", HORIZONTAL_ALIGNMENT_CENTER, 1600, 18, Color("8adff2"))
	draw_string(font, Vector2(0, 458), "+%d KERNKRISTALLE  •  GUTHABEN %d" % [last_mission_reward, core_crystals], HORIZONTAL_ALIGNMENT_CENTER, 1600, 18, Color("8fffea"))
	draw_string(font, Vector2(0, 492), "Highscore: %d  •  Effizienzbonus: ×%.2f" % [_calculate_run_score(), clampf(1.0 + (10.0 - towers_built_this_run) * 0.05, 0.50, 1.50)], HORIZONTAL_ALIGNMENT_CENTER, 1600, 15, Color("d6eaf0"))
	_draw_button(start_button, "ZUM HAUPTMENÜ", false, Color("185f68"))


func _draw_endless_offer() -> void:
	var font := ThemeDB.fallback_font
	draw_rect(Rect2(Vector2.ZERO, SCREEN), Color(0.0, 0.025, 0.055, 0.88))
	draw_string(font, Vector2(0, 280), "SEKTOR GESICHERT", HORIZONTAL_ALIGNMENT_CENTER, 1600, 50, Color("8fffea"))
	draw_string(font, Vector2(0, 345), "Alle %d regulären Wellen wurden abgewehrt." % MAX_WAVES, HORIZONTAL_ALIGNMENT_CENTER, 1600, 22, Color.WHITE)
	draw_string(font, Vector2(0, 405), "Möchtest du den Einsatz im immer schwereren Endlosmodus fortsetzen?", HORIZONTAL_ALIGNMENT_CENTER, 1600, 19, Color("8adff2"))
	if victory_reward_pending:
		draw_string(font, Vector2(0, 450), "WERBUNG WIRD GELADEN  •  KERNKRISTALLE DANACH: %d" % int(_difficulty().crystals), HORIZONTAL_ALIGNMENT_CENTER, 1600, 16, Color("ffcf7a"))
	else:
		draw_string(font, Vector2(0, 450), "+%d Kernkristalle gutgeschrieben. Ein späteres Ende gilt nicht als gescheitert." % last_mission_reward, HORIZONTAL_ALIGNMENT_CENTER, 1600, 16, Color("8fffea"))
		_draw_button(endless_button, "ENDLOSMODUS STARTEN", false, Color("215b68"))
		_draw_button(finish_mission_button, "MISSION BEENDEN", false, Color("24394c"))


func _draw_endless_result() -> void:
	var font := ThemeDB.fallback_font
	draw_rect(Rect2(Vector2.ZERO, SCREEN), Color(0.0, 0.02, 0.045, 0.84))
	draw_string(font, Vector2(0, 315), "ENDLOSAUFTRAG BEENDET", HORIZONTAL_ALIGNMENT_CENTER, 1600, 48, Color("8feeff"))
	draw_string(font, Vector2(0, 382), "Erreichte Welle: %d" % wave, HORIZONTAL_ALIGNMENT_CENTER, 1600, 23, Color.WHITE)
	draw_string(font, Vector2(0, 425), "Der reguläre Sektorauftrag bleibt erfolgreich abgeschlossen.", HORIZONTAL_ALIGNMENT_CENTER, 1600, 17, Color("8adff2"))
	draw_string(font, Vector2(0, 462), "KERNKRISTALLE  %d" % core_crystals, HORIZONTAL_ALIGNMENT_CENTER, 1600, 17, Color("8fffea"))
	draw_string(font, Vector2(0, 492), "Highscore: %d  •  Effizienzbonus: ×%.2f" % [_calculate_run_score(), clampf(1.0 + (10.0 - towers_built_this_run) * 0.05, 0.50, 1.50)], HORIZONTAL_ALIGNMENT_CENTER, 1600, 15, Color("d6eaf0"))
	_draw_button(start_button, "NEUER EINSATZ", false, Color("18556f"))


func _draw_tutorial() -> void:
	var font := ThemeDB.fallback_font
	var title := "1/3  VERTEIDIGUNG WÄHLEN"
	var body := "Wähle unten das KINETIK-Geschütz."
	if tutorial_step == 1:
		title = "2/3  TURM PLATZIEREN"
		body = "Setze den Turm auf eine freie Metallfläche neben der Flugroute."
	elif tutorial_step == 2:
		title = "3/3  ANGRIFF STARTEN"
		body = "Starte oben rechts die erste Welle."
	draw_rect(Rect2(30, 110, 500, 132), Color(0.01, 0.035, 0.07, 0.95))
	draw_rect(Rect2(30, 110, 500, 132), Color("55d8ee"), false, 2.0)
	draw_string(font, Vector2(50, 147), title, HORIZONTAL_ALIGNMENT_LEFT, 450, 19, Color("8ff4ff"))
	draw_string(font, Vector2(50, 184), body, HORIZONTAL_ALIGNMENT_LEFT, 445, 15, Color.WHITE)
	_draw_button(tutorial_skip_button, "ÜBERSPRINGEN", false, Color("24394c"))


func _is_valid_build_position(position: Vector2, owner := 0) -> bool:
	var correct_coop_side := true
	if coop_mode:
		correct_coop_side = position.x < COOP_MIRROR_X - GRID_SIZE * 0.5 if owner == 0 else position.x > COOP_MIRROR_X + GRID_SIZE * 0.5
	return correct_coop_side and _is_in_build_zone(position) and not _is_in_reactor_zone(position) and not _is_path_cell(position) and position.x >= GRID_SIZE * 0.5 and position.x <= _active_world_width() - GRID_SIZE * 0.5 and position.y >= GRID_SIZE * 0.5 and position.y <= WORLD_SIZE.y - GRID_SIZE * 0.5 and _tower_at(position, GRID_SIZE * 0.72) < 0