const assert = require("assert");
const fs = require("fs");
const vm = require("vm");
const path = require("path");

const source = fs.readFileSync(path.join(__dirname, "..", "runtime", "build", "index.js"), "utf8");
const context = { console, Math, Date, JSON, isFinite };
vm.createContext(context);
vm.runInContext(source, context);

const sent = [];
const dispatcher = {
  broadcastMessage(opCode, data) {
    sent.push({ opCode, data: JSON.parse(data) });
  }
};
const nk = { binaryToString: data => Buffer.from(data).toString("utf8") };
const logger = { info() {} };
const presenceA = { userId: "pilot-a", sessionId: "a", username: "Pilot A" };
const presenceB = { userId: "pilot-b", sessionId: "b", username: "Pilot B" };

let state = context.matchInit({}, logger, nk, { difficulty: 1 }).state;
state = context.matchJoin({}, logger, nk, dispatcher, 1, state, [presenceA]).state;
state = context.matchJoin({}, logger, nk, dispatcher, 2, state, [presenceB]).state;
assert.strictEqual(state.started, true);
assert.strictEqual(state.slots["pilot-a"], 0);
assert.strictEqual(state.slots["pilot-b"], 1);

function message(sender, opCode, payload) {
  return { sender, opCode, data: Buffer.from(JSON.stringify(payload)) };
}

state = context.matchLoop({}, logger, nk, dispatcher, 3, state, [
  message(presenceA, 10, { tower_type: 0, x: 200, y: 200 }),
  message(presenceB, 10, { tower_type: 1, x: 2760, y: 200 })
]).state;
assert.strictEqual(state.towers.length, 2);
assert.strictEqual(state.credits[0], 310);
assert.strictEqual(state.credits[1], 250);

state = context.matchLoop({}, logger, nk, dispatcher, 4, state, [message(presenceA, 13, {})]).state;
assert.strictEqual(state.wave, 1);
assert.strictEqual(state.waveActive, true);
for (let tick = 5; tick < 30; tick++) state = context.matchLoop({}, logger, nk, dispatcher, tick, state, []).state;
assert.ok(state.enemies.length > 0 || state.spawnRemaining > 0);
assert.ok(sent.some(entry => entry.opCode === 1 && entry.data.started === true));

const towerA = state.towers.find(tower => tower.owner === 0);
state = context.matchLoop({}, logger, nk, dispatcher, 30, state, [message(presenceA, 11, { tower_id: towerA.id })]).state;
assert.strictEqual(state.towers.find(tower => tower.id === towerA.id).level, 2);
state = context.matchLoop({}, logger, nk, dispatcher, 31, state, [message(presenceA, 12, { tower_id: towerA.id })]).state;
assert.ok(!state.towers.some(tower => tower.id === towerA.id));

console.log("VOID_BASTION_SERVER_SIM_OK");