/**
 * System dossier HUD test (dev tool, run with Node — no browser):
 *
 *   node dev/system-hud.test.mjs
 *
 * Runs the REAL GameScene.createSystemHud()/updateHudDecode()
 * (js/scenes/GameScene.js) against the real galaxy + SystemReport data and
 * a stubbed scene, then asserts the arrival-decode behavior — the same
 * "decode" scramble the menu uses on the Galaxy Seed (js/utils/Decode.js):
 *   - the dossier renders the name first, then the data lines, in the same
 *     layout as before (y positions, hudEndY);
 *   - every line starts EMPTY;
 *   - the system name begins decoding before any line below it (stagger);
 *   - while a line decodes: length stays the target's, the revealed prefix
 *     is exact, the unrevealed tail comes from the decode alphabet;
 *   - once a line lands it never changes again;
 *   - at the end every line is exactly the report string and the decode
 *     state self-clears (hudDecode === null).
 */
import { pathToFileURL } from 'node:url';
import { fileURLToPath } from 'node:url';
import { dirname, join } from 'node:path';

const __dirname = dirname(fileURLToPath(import.meta.url));

// --- Stub just enough of Phaser for the module-level class declarations ----
const ClassStub = class {};
const PhaserStub = {
  Scene: ClassStub,
  Physics: { Arcade: { Sprite: ClassStub } },
  GameObjects: { Sprite: ClassStub, Container: ClassStub },
  Geom: { Rectangle: class {} },
  Display: { Color: { ValueToColor: (v) => ({ color: parseInt(v.slice(1), 16) }) } },
  Math: {
    Linear: (a, b, t) => a + (b - a) * t,
    FloatBetween: (a, b) => a + Math.random() * (b - a),
    Angle: { Wrap: (a) => a },
    Clamp: (v, lo, hi) => Math.min(hi, Math.max(lo, v)),
  },
  BlendModes: { ADD: 2 },
};
globalThis.window = { Phaser: PhaserStub }; // js/vendor/phaser.js reads this

// --- Load the real config (data/*.json) into the config singleton ----------
const { config } = await import(pathToFileURL(join(__dirname, '../js/config/Config.js')).href);
const fs = await import('node:fs');
const dataDir = join(__dirname, '../data');
const configData = {};
for (const f of fs.readdirSync(dataDir)) {
  if (!f.endsWith('.json') || f === 'manifest.json') continue;
  configData[f.replace(/\.json$/i, '')] = JSON.parse(fs.readFileSync(join(dataDir, f), 'utf8'));
}
config.init(configData);

const { Galaxy } = await import(pathToFileURL(join(__dirname, '../js/galaxy/Galaxy.js')).href);
const { formatSystemReport } = await import(pathToFileURL(join(__dirname, '../js/galaxy/SystemReport.js')).href);
const { DECODE_CHARS } = await import(pathToFileURL(join(__dirname, '../js/utils/Decode.js')).href);
const { GameScene } = await import(pathToFileURL(join(__dirname, '../js/scenes/GameScene.js')).href);

let failures = 0;
const check = (label, cond) => {
  console.log(`${cond ? '✔' : '✘ FAIL'}  ${label}`);
  if (!cond) failures++;
};

// --- Real galaxy + real report for one system ------------------------------
const galaxy = Galaxy.create('decode-hud-test');
const rec = galaxy.currentSystem();
const content = galaxy.ensureContent(rec.id);
const report = formatSystemReport(content);
const expected = [
  report.title,
  report.subtitle,
  ...report.settlements.map((s) => s.text),
  report.summary,
  `seed ${galaxy.seed}`,
];
console.log(`dossier under test:\n${expected.map((s) => '  ' + s).join('\n')}\n`);

// --- Stub scene: just what createSystemHud()/updateHudDecode() touch -------
const texts = [];
class FakeText {
  constructor(x, y, str) {
    this.x = x;
    this.y = y;
    this.text = str;
    this.depth = 0;
  }
  setText(s) { this.text = s; return this; }
  setOrigin() { return this; }
  setScrollFactor() { return this; }
  setDepth(d) { this.depth = d; return this; }
}
const scene = {
  time: { now: 0 },
  add: { text: (x, y, str) => { const t = new FakeText(x, y, str); texts.push(t); return t; } },
  systemRecord: rec,
  systemContent: content,
  galaxy,
};

GameScene.prototype.createSystemHud.call(scene);

// --- Layout: same lines, same positions as before the decode ---------------
check('one text per dossier line (name, subtitle, settlements, summary, seed)', texts.length === expected.length);
check('every line starts empty', texts.every((t) => t.text === ''));
check('all lines pinned left/top (16, 14+)', texts.every((t) => t.x === 16 && t.y >= 14));
{
  // Expected y walk: title @14 (+26, it's 17px), subtitle @40 (+20),
  // +2, then one +20 per line (each line steps the cursor on, seed last),
  // hudEndY = final y + 6 — exactly the original layout.
  let y = 14;
  const ys = [y];
  y += 26;
  ys.push(y); // subtitle
  y += 20;
  y += 2;
  for (let i = 0; i < report.settlements.length; i++) { ys.push(y); y += 20; }
  ys.push(y); // summary
  y += 20;
  ys.push(y); // seed
  y += 20;
  check('y layout unchanged by the decode', texts.every((t, i) => t.y === ys[i]));
  check('hudEndY unchanged by the decode', scene.hudEndY === y + 6);
}
check('decode state is live (t0 unanchored until the first frame)', scene.hudDecode !== null && scene.hudDecode.t0 === null);

// --- Simulate the arrival: frames at 16 ms from a 1000 ms "first frame" ----
// "Settled" is read from the scene's own flag (dec.finished is the real
// signal — a mid-decode full-string match is a coincidence, not settlement).
const T0 = 1000;
const firstNonEmpty = new Array(expected.length).fill(null);
let prefixOk = true;
let tailAlphabetOk = true;
let lengthOk = true;
let settledContractOk = true;

for (let t = T0; t <= T0 + 4000; t += 16) {
  GameScene.prototype.updateHudDecode.call(scene, t);
  const hd = scene.hudDecode;
  texts.forEach((text, i) => {
    const target = expected[i];
    if (firstNonEmpty[i] === null && text.text !== '') firstNonEmpty[i] = t;
    if (text.text === '') return;
    if (text.text.length !== target.length) lengthOk = false;
    // Once the scene has settled the line, it is final: exact, and only at
    // or after the end of its decode window (dec.t0 + dec.dur).
    if (hd && hd.lines[i].settled) {
      if (text.text !== target || t < hd.lines[i].dec.t0 + hd.lines[i].dec.dur) settledContractOk = false;
      return;
    }
    if (text.text === target) return; // mid-decode coincidence — passes the checks below
    // Decoding: revealed prefix exact, tail from the decode alphabet.
    let n = 0;
    while (n < target.length && text.text[n] === target[n]) n++;
    if (text.text.slice(0, n) !== target.slice(0, n)) prefixOk = false;
    for (let k = n; k < text.text.length; k++) if (DECODE_CHARS.indexOf(text.text[k]) === -1) tailAlphabetOk = false;
  });
}

check('first frame: every line still empty (the beat of arrival)', texts.every((t, i) => firstNonEmpty[i] === null || firstNonEmpty[i] > T0));
check('the system name starts decoding first', firstNonEmpty[0] !== null && firstNonEmpty.every((t, i) => (t ?? Infinity) >= firstNonEmpty[0]));
check('decode order is top-to-bottom', firstNonEmpty.every((t, i) => i === 0 || (t ?? Infinity) >= (firstNonEmpty[i - 1] ?? Infinity)));
check('display length stays the target’s through the window', lengthOk);
check('revealed prefix always exact, tail from the decode alphabet', prefixOk && tailAlphabetOk);
check('every line lands as exactly the report string', texts.every((t, i) => t.text === expected[i]));
check('a settled line is final (exact, and only after its window)', settledContractOk);
check('decode state self-clears after arrival', scene.hudDecode === null);
check('updateHudDecode is a no-op once cleared', (() => {
  const snap = texts.map((t) => t.text);
  GameScene.prototype.updateHudDecode.call(scene, T0 + 5000);
  return texts.every((t, i) => t.text === snap[i]);
})());

if (failures > 0) {
  console.error(`\n${failures} system-hud test(s) FAILED`);
  process.exit(1);
}
console.log('\nsystem-hud: all checks passed');