import assert from 'node:assert/strict';
import test from 'node:test';
import type { GameApi } from '../src/client/api.js';
import { createLobbyFeatures } from '../src/client/lobby-features.js';
import { normalizeAppearance, type FighterAppearance } from '../src/shared/cosmetics.js';
import type { PlayerProfile } from '../src/shared/ranked-types.js';

// A selector/event surface, not an HTML parser or rendering implementation.
// The test invokes the production selection/equip handlers and observes the
// appearance callback used by main.ts to display the equipped character.
function documentSurface() {
  const ids = new Map<string, Element>();
  class Element {
    nodes = new Map<string, Element>();
    listeners = new Map<string, (event: any) => void>();
    classList = { remove() {} };
    disabled = false; textContent = ''; innerHTML = ''; value = '';
    onclick?: () => void | Promise<void>;
    set id(id: string) { ids.set(id, this); }
    querySelector(selector: string): Element {
      if (!this.nodes.has(selector)) this.nodes.set(selector, new Element());
      return this.nodes.get(selector)!;
    }
    addEventListener(name: string, listener: (event: any) => void) { this.listeners.set(name, listener); }
    prepend() {} after() {} append() {} showModal() {} close() {}
  }
  const document = {
    body: new Element(), createElement: () => new Element(), querySelector: () => new Element(),
    getElementById(id: string) {
      if (!ids.has(id)) ids.set(id, new Element());
      return ids.get(id)!;
    },
  };
  return document;
}

test('a profile read started before equip cannot undo the saved appearance', async t => {
  const document = documentSurface(), original = Object.getOwnPropertyDescriptor(globalThis, 'document');
  Object.defineProperty(globalThis, 'document', { configurable: true, value: document });
  t.after(() => {
    if (original) Object.defineProperty(globalThis, 'document', original);
    else Reflect.deleteProperty(globalThis, 'document');
  });
  const profile = (skinTone: 'light' | 'tan'): PlayerProfile => ({
    playerId: 'player-a', displayName: 'Alpha', appearance: normalizeAppearance({ characterId: 0, skinTone, colorId: 'white' }),
    stats: { wins: 0, losses: 0, draws: 0, current: 0, best: 0 }, unlockedColors: ['white'], unlockedEquipment: [],
  });
  let finishOldRead!: (value: PlayerProfile) => void;
  const oldRead = new Promise<PlayerProfile>(resolve => { finishOldRead = resolve; });
  let reads = 0, savedAppearance: FighterAppearance | undefined;
  const appearances: FighterAppearance[] = [];
  let savedDisplayed!: () => void;
  const displayed = new Promise<void>(resolve => { savedDisplayed = resolve; });
  const api = { async request(path: string, method?: string, body?: { appearance: FighterAppearance }) {
    assert.equal(path, '/api/profile');
    if (method === 'POST') {
      savedAppearance = body!.appearance;
      return { ...profile('light'), appearance: normalizeAppearance(savedAppearance) };
    }
    return ++reads === 1 ? profile('light') : oldRead;
  } } as unknown as GameApi;
  const lobby = createLobbyFeatures({ api, onQueue() {}, onMatch() {}, onHome() {}, onAvailabilityChange() {},
    onError(error) { throw error; },
    onAppearance(appearance) {
      appearances.push(appearance);
      if (appearance.skinTone === 'tan') savedDisplayed();
    },
  });
  await lobby.initialize(false);
  const opening = document.getElementById('appearance-open').onclick!();
  const dialog = document.getElementById('appearance-dialog');
  dialog.querySelector('.skin-options').listeners.get('click')!({
    target: { closest: () => ({ dataset: { skin: 'tan' } }) },
  });
  const equip = dialog.querySelector('.equip');
  assert.equal(equip.disabled, false);
  equip.onclick!();
  await displayed;
  assert.deepEqual(savedAppearance, normalizeAppearance({ characterId: 0, skinTone: 'tan', colorId: 'white' }));
  finishOldRead(profile('light'));
  await opening;
  assert.deepEqual(appearances.at(-1), savedAppearance, 'the late GET must not revert the displayed equipment');
  assert.equal(equip.disabled, true, 'the saved preview must still be equipped');
});

for (const editedDuringLoad of [false, true]) {
  test(editedDuringLoad
    ? 'refresh preserves hair edits made while the profile is loading'
    : 'refresh replaces an untouched preview with equipment saved in another tab', async t => {
    const document = documentSurface(), original = Object.getOwnPropertyDescriptor(globalThis, 'document');
    Object.defineProperty(globalThis, 'document', { configurable: true, value: document });
    t.after(() => {
      if (original) Object.defineProperty(globalThis, 'document', original);
      else Reflect.deleteProperty(globalThis, 'document');
    });
    const cached = normalizeAppearance({ characterId: 0, colorId: 'white' });
    const remote = normalizeAppearance({ characterId: 1, colorId: 'white', equipment: ['shoes'] });
    const profile = (appearance: FighterAppearance): PlayerProfile => ({
      playerId: 'player-a', displayName: 'Alpha', appearance,
      stats: { wins: 5, losses: 0, draws: 0, current: 5, best: 5 },
      unlockedColors: ['white'], unlockedEquipment: ['shoes', 'wristbands'],
    });
    let finishRead!: (profile: PlayerProfile) => void;
    const pendingRead = new Promise<PlayerProfile>(resolve => { finishRead = resolve; });
    let reads = 0, savedAppearance: FighterAppearance | undefined;
    let savedDisplayed!: () => void;
    const displayed = new Promise<void>(resolve => { savedDisplayed = resolve; });
    const api = { async request(path: string, method?: string, body?: { appearance: FighterAppearance }) {
      assert.equal(path, '/api/profile');
      if (method === 'POST') { savedAppearance = body!.appearance; return profile(savedAppearance); }
      return ++reads === 1 ? profile(cached) : pendingRead;
    } } as unknown as GameApi;
    const lobby = createLobbyFeatures({ api, onQueue() {}, onMatch() {}, onHome() {}, onAvailabilityChange() {},
      onError(error) { throw error; }, onAppearance() { if (savedAppearance) savedDisplayed(); },
    });
    await lobby.initialize(false);
    const opening = document.getElementById('appearance-open').onclick!();
    const dialog = document.getElementById('appearance-dialog');
    const chooseBald = () => dialog.querySelector('.hair-options').listeners.get('click')!({
      target: { closest: () => ({ dataset: { hair: 'bald' } }) },
    });
    if (editedDuringLoad) chooseBald();
    finishRead(profile(remote));
    await opening;
    const equip = dialog.querySelector('.equip');
    assert.equal(equip.disabled, !editedDuringLoad, 'an untouched refreshed preview is already equipped');
    if (!editedDuringLoad) chooseBald();
    assert.equal(equip.disabled, false);
    equip.onclick!();
    await displayed;
    assert.deepEqual(savedAppearance, editedDuringLoad
      ? normalizeAppearance({ characterId: 0, colorId: 'white', hairStyle: 'bald', equipment: [] })
      : normalizeAppearance({ characterId: 1, colorId: 'white', hairStyle: 'bald', equipment: ['shoes'] }));
  });
}