/**
 * 立直麻将 — 联机 E2E（真实 UI + server + engine，4 端）。
 *
 * 覆盖：
 *  1. 4 人注册 → 建房（4 座）→ 加入 → 房主开始对局。
 *  2. 进入 playing：每人只见己方手牌；对手座位只显示牌背（无真实牌泄漏）。
 *  3. 当前行动者打出第一张可点牌，轮转推进；牌河累积。
 *  4. 鸣牌窗口出现时自动跳过。
 *
 * 参考：apps/web/e2e/bridge-multiplayer.spec.ts。
 */
import { test, expect, type Browser, type Page, type BrowserContext } from '@playwright/test';

interface Seat {
  ctx: BrowserContext;
  page: Page;
  pid: string;
  name: string;
}

async function authUser(suffix: string): Promise<{ token: string; username: string }> {
  const uname = `mj${suffix}${Math.floor(Math.random() * 1e6)}`.slice(0, 18);
  const pwd = 'pw123456';
  const base = process.env.TTS_API_BASE ?? 'http://localhost:8000';
  const reg = await fetch(`${base}/api/auth/register`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ username: uname, password: pwd }),
  });
  if (reg.ok) {
    const j = (await reg.json()) as { token: string; username: string };
    return { token: j.token, username: j.username };
  }
  const login = await fetch(`${base}/api/auth/login`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ username: uname, password: pwd }),
  });
  const j = (await login.json()) as { token: string; username: string };
  return { token: j.token, username: j.username };
}

async function newSeat(browser: Browser, pid: string, auth: { token: string; username: string }): Promise<Seat> {
  const ctx = await browser.newContext();
  const page = await ctx.newPage();
  await page.addInitScript(
    ([token, username]) => {
      localStorage.setItem('tts-like.token', token);
      localStorage.setItem('tts-like.username', username);
    },
    [auth.token, auth.username] as [string, string],
  );
  await page.goto('/');
  page.on('console', (m) => console.log(`[browser:${pid}] ${m.text()}`));
  await page.getByTestId('game-select').selectOption('mahjong');
  await page.getByTestId('mode-online').click();
  await expect(page.getByTestId('lobby-room-list')).toBeVisible({ timeout: 15_000 });
  return { ctx, page, pid, name: auth.username };
}

/** 当前可出牌的 seat（本人回合且手牌可点）。 */
async function discardActor(seats: Seat[]): Promise<Seat | null> {
  for (const s of seats) {
    const n = await s.page.locator('[data-testid=mj-myhand] [data-playable="true"]').count().catch(() => 0);
    if (n > 0) return s;
  }
  return null;
}

/** 任意 seat 出现鸣牌窗口就跳过。 */
async function passClaims(seats: Seat[]): Promise<void> {
  for (const s of seats) {
    const btn = s.page.getByTestId('mj-claim-pass');
    if ((await btn.count()) > 0 && (await btn.isVisible().catch(() => false))) {
      await btn.click().catch(() => {});
    }
  }
}

test.describe('立直麻将 — 4 人联机 端到端', () => {
  test('建房 → 开局 → 隐藏信息 → 轮转打牌', async ({ browser }) => {
    const auths = [
      await authUser('a'),
      await authUser('b'),
      await authUser('c'),
      await authUser('d'),
    ];
    const seats = [
      await newSeat(browser, '0', auths[0]!),
      await newSeat(browser, '1', auths[1]!),
      await newSeat(browser, '2', auths[2]!),
      await newSeat(browser, '3', auths[3]!),
    ];

    // ===== 1. P0 建房（mahjong 可变人数，显式选 4 座） =====
    await expect(async () => {
      const btn = seats[0]!.page.getByTestId('lobby-create-room');
      await expect(btn).toBeEnabled({ timeout: 2_000 });
      const seatsSel = seats[0]!.page.getByTestId('lobby-create-seats');
      if ((await seatsSel.count()) > 0) await seatsSel.selectOption('4').catch(() => {});
      await btn.click();
    }).toPass({ timeout: 15_000 });
    await expect(seats[0]!.page.getByTestId('mj-waiting')).toBeVisible({ timeout: 15_000 });

    const roomText = await seats[0]!.page.getByTestId('lobby-current-room').innerText();
    const mid = roomText.match(/在房间\s+(\S+)\s+作为/)?.[1] ?? '';

    // ===== 2. 其余 3 家加入 =====
    for (const seat of seats.slice(1)) {
      await expect(async () => {
        await seat.page.getByTestId('lobby-refresh').click();
        const btn = seat.page.getByTestId(`lobby-join-${seat.pid}-${mid}`);
        expect(await btn.count()).toBeGreaterThan(0);
      }).toPass({ timeout: 15_000 });
      await seat.page.getByTestId(`lobby-join-${seat.pid}-${mid}`).click();
      await expect(seat.page.getByTestId('mj-waiting')).toBeVisible({ timeout: 15_000 });
    }

    // ===== 3. 房主开局 =====
    await expect(async () => {
      const btn = seats[0]!.page.getByTestId('mj-start');
      await expect(btn).toBeEnabled({ timeout: 2_000 });
      await btn.click();
    }).toPass({ timeout: 15_000 });

    await expect(async () => {
      for (const seat of seats) {
        await expect(seat.page.getByTestId('mj-myhand')).toBeVisible({ timeout: 5_000 });
      }
    }).toPass({ timeout: 15_000 });

    // ===== 4. 隐藏信息：各见己方手牌；对手座位无真实牌泄漏 =====
    for (const seat of seats) {
      const selfTiles = await seat.page.locator('[data-testid=mj-myhand] [data-testid^=mj-tile-]').count();
      expect(selfTiles).toBeGreaterThanOrEqual(13);
      for (const other of seats.filter((s) => s.pid !== seat.pid)) {
        const leaked = await seat.page.locator(`[data-testid=mj-seat-${other.pid}] [data-testid^=mj-tile-]`).count();
        expect(leaked).toBe(0);
      }
    }

    // ===== 5. 连续打牌若干轮（当前行动者打出第一张可点牌；有鸣牌窗口则跳过） =====
    for (let i = 0; i < 6; i++) {
      await passClaims(seats);
      await expect(async () => {
        const actor = await discardActor(seats);
        expect(actor).not.toBeNull();
      }).toPass({ timeout: 15_000 });
      const actor = await discardActor(seats);
      if (!actor) throw new Error(`第 ${i + 1} 手：没有可出牌的玩家`);
      await actor.page.locator('[data-testid=mj-myhand] [data-playable="true"]').first().click();
      await seats[0]!.page.waitForTimeout(500);
    }

    // 牌河累积（被合理的鸣牌消耗后仍应 >= 3）
    const totalRiver = await seats[0]!.page.locator('[data-testid^=mj-river-] [data-testid^=mj-tile-]').count();
    expect(totalRiver).toBeGreaterThanOrEqual(3);

    console.log('mahjong matchID:', mid);
  });
});