import type { Page } from '@playwright/test';
import { expect, test } from './fixtures';

const moicenUnionid = process.env.MOICEN_E2E_UNIONID?.trim();

function decodeJwtPayload(token: string): Record<string, unknown> | null {
  const raw = token.startsWith('Bearer ') ? token.slice(7).trim() : token;
  const parts = raw.split('.');
  if (parts.length !== 3) return null;
  try {
    const base64 = parts[1].replace(/-/g, '+').replace(/_/g, '/');
    const padded = base64 + '='.repeat((4 - (base64.length % 4)) % 4);
    const json = Buffer.from(padded, 'base64').toString('utf8');
    return JSON.parse(json) as Record<string, unknown>;
  } catch {
    return null;
  }
}

/** 与 `huike-front/src/main.ts` 中 `parseCurrentOrgIdFromToken` 一致：claims 可能在顶层或嵌在 `sub` JSON 内 */
function extractOrgIdFromTokenPayload(
  payload: Record<string, unknown> | null
): string | undefined {
  if (!payload) return undefined;
  const top = payload.current_org_id;
  if (typeof top === 'string' && top.length > 0) return top;
  const sub = payload.sub;
  if (typeof sub !== 'string' || sub.length === 0) return undefined;
  try {
    const inner = JSON.parse(sub) as Record<string, unknown>;
    const innerOrg = inner.current_org_id;
    if (typeof innerOrg === 'string' && innerOrg.length > 0) return innerOrg;
  } catch {
    return undefined;
  }
  return undefined;
}

/**
 * 教学资源相关任意壳层可见即可（`/course/summary` 入口链或课程体系列表）。
 * CI 上 SPA 长连接会导致 networkidle 不可靠；此处只用 DOM 信号轮询。
 */
async function waitForCourseRealmVisible(page: Page) {
  const deadline = Date.now() + 95_000;
  while (Date.now() < deadline) {
    const titleHit = await page.title().catch(() => '');
    if (/教学资源库|课程体系/.test(titleHit)) {
      return;
    }
    if (
      await page.getByRole('link', { name: '课程体系' }).isVisible().catch(() => false)
    ) {
      return;
    }
    for (const label of ['课程体系', '课程', '课节']) {
      if (
        await page
          .locator('.van-cell')
          .filter({ hasText: new RegExp(label) })
          .first()
          .isVisible()
          .catch(() => false)
      ) {
        return;
      }
    }
    if (
      await page
        .getByPlaceholder('请输入课程体系名称搜索')
        .isVisible()
        .catch(() => false)
    ) {
      return;
    }
    if (
      await page.locator('.van-search').first().isVisible().catch(() => false)
    ) {
      return;
    }
    await page.waitForTimeout(400);
  }
  throw new Error(`教学资源壳层未出现：${page.url()}`);
}

async function establishSession(page: Page) {
  const q = new URLSearchParams({
    unionid: moicenUnionid!,
    status: '2',
  });
  await page.goto(`/?${q.toString()}`, {
    waitUntil: 'domcontentloaded',
    timeout: 60_000,
  });
  await expect(page.locator('#app')).toBeVisible({ timeout: 60_000 });
  if (
    await page.getByText('请选择您的登录身份').isVisible().catch(() => false)
  ) {
    await page.locator('.van-grid-item').first().click();
  }
  await expect(
    page.getByText(/请选择您的登录身份|欢迎回来|进入工作台/)
  ).toBeVisible({ timeout: 120_000 });
}

/**
 * 停留在 `/` 时 main.ts 不会把 JWT 中的机构写入 CurrentOrgId。
 * 深链会触发守卫；多机构且无上下文时会先进入 `/org/select`，需点选机构后再继续。
 * 交替尝试 summary 与课程索引：部分账号在 CI 上只对其中之一稳定渲染壳层。
 */
async function resolveOrgContextForCoursePage(page: Page) {
  const deepPaths = ['/course/summary', '/course'] as const;

  for (let attempt = 0; attempt < 8; attempt++) {
    const targetPath = deepPaths[attempt % deepPaths.length];
    await page.goto(targetPath, {
      waitUntil: 'domcontentloaded',
      timeout: 90_000,
    });
    await expect(page.locator('#app')).toBeVisible({ timeout: 90_000 });

    if (page.url().includes('/org/select')) {
      await expect(page.getByText(/请选择机构|选择机构/)).toBeVisible({
        timeout: 60_000,
      });
      await Promise.race([
        page
          .locator('.main .van-cell-group .van-cell')
          .first()
          .waitFor({ state: 'visible', timeout: 60_000 }),
        page.getByText('暂无可用机构').waitFor({ state: 'visible', timeout: 60_000 }),
      ]);

      const emptyOrgs = await page
        .getByText('暂无可用机构')
        .isVisible()
        .catch(() => false);
      if (emptyOrgs) {
        test.skip(true, '账号无可用机构，跳过机构上下文用例');
      }

      const pickCells = page.locator('.main .van-cell-group .van-cell');
      const n = await pickCells.count();
      expect(n, '机构选择页应有可选机构').toBeGreaterThan(0);
      await pickCells.first().click();
      await expect(page.locator('#app')).toBeVisible({ timeout: 90_000 });
      continue;
    }

    try {
      const path = new URL(page.url()).pathname || '';
      const onCourseRealm =
        path === '/course' || path.startsWith('/course/');
      if (onCourseRealm) {
        await waitForCourseRealmVisible(page);
        return;
      }
    } catch {
      /* URL 解析失败则继续重试 */
    }

    // 守卫可能暂时送回首页「进入工作台」等，下一循环再深链
  }

  throw new Error(
    'resolveOrgContextForCoursePage: 无法在合理步数内进入教学资源链（/course/summary 等）'
  );
}

test.describe('多机构数据隔离（会话与 token）', () => {
  test.describe.configure({ timeout: 180_000 });

  test.skip(!moicenUnionid, '需要 MOICEN_E2E_UNIONID（Secret 或 .env.e2e）');

  test('本地 CurrentOrgId 与 JWT current_org_id 一致', async ({ page }) => {
    await establishSession(page);
    if (
      await page.getByText('请返回微信小程序完成登录').isVisible().catch(() => false)
    ) {
      test.skip(true, '当前 unionid 会话未处于可用登录态');
    }

    await resolveOrgContextForCoursePage(page);

    const storage = await page.evaluate(() => ({
      currentOrgId: window.localStorage.getItem('CurrentOrgId'),
      authorization: window.localStorage.getItem('Authorization'),
    }));
    expect(storage.authorization, '登录后应有 Authorization').toBeTruthy();

    const payload = decodeJwtPayload(storage.authorization!);
    expect(payload, 'Authorization 应为可解析的 JWT').not.toBeNull();
    const jwtOrgId = extractOrgIdFromTokenPayload(payload);
    expect(jwtOrgId, 'JWT（含 sub 嵌套）应能解析出 current_org_id').toBeTruthy();
    if (storage.currentOrgId) {
      expect(storage.currentOrgId).toBe(jwtOrgId);
    }
  });

  test('机构选择页存在多个机构时，切换后 CurrentOrgId 变化', async ({
    page,
  }) => {
    await establishSession(page);
    if (
      await page.getByText('请返回微信小程序完成登录').isVisible().catch(() => false)
    ) {
      test.skip(true, '当前 unionid 会话未处于可用登录态');
    }

    await resolveOrgContextForCoursePage(page);

    await page.goto('/org/select', {
      waitUntil: 'load',
      timeout: 90_000,
    });
    await expect(page.locator('#app')).toBeVisible({ timeout: 90_000 });
    await page.waitForURL(/\/org\/select/, { timeout: 90_000 });
    // 与 `org/select.vue` 根节点一致；避免 getByText 在 Vant/拆行下偶发匹配不到
    await expect(page.locator('.main')).toBeVisible({ timeout: 90_000 });
    if (
      await page.getByText('暂无可用机构').isVisible().catch(() => false)
    ) {
      test.skip(true, '机构接口无数据，跳过多机构切换断言');
    }
    await expect(page.locator('.main h4')).toContainText(/请选择机构/, {
      timeout: 90_000,
    });

    const orgCells = page.locator('.main .van-cell-group .van-cell');
    const count = await orgCells.count();
    test.skip(
      count < 2,
      '账号仅绑定单一机构时跳过切换断言（仍可通过 JWT 对齐用例校验隔离键）'
    );

    let beforeOrg: string | null = await page.evaluate(() =>
      window.localStorage.getItem('CurrentOrgId')
    );
    if (!beforeOrg) {
      const authSnap = await page.evaluate(() =>
        window.localStorage.getItem('Authorization')
      );
      beforeOrg =
        extractOrgIdFromTokenPayload(
          decodeJwtPayload(authSnap ?? '')
        ) ?? null;
    }
    expect(beforeOrg, '切换前应能从 localStorage 或 JWT 解析当前机构').toBeTruthy();

    await orgCells.nth(1).click();
    await page.waitForURL(
      (u) => {
        try {
          return new URL(u).pathname === '/' || new URL(u).pathname === '';
        } catch {
          return false;
        }
      },
      { timeout: 90_000 }
    );
    await expect(page.locator('#app')).toBeVisible({ timeout: 90_000 });

    const afterOrg = await page.evaluate(() =>
      window.localStorage.getItem('CurrentOrgId')
    );
    expect(afterOrg).toBeTruthy();
    expect(afterOrg).not.toBe(beforeOrg);

    const authAfter = await page.evaluate(() =>
      window.localStorage.getItem('Authorization')
    );
    const payloadAfter = decodeJwtPayload(authAfter ?? '');
    const jwtOrgAfter = extractOrgIdFromTokenPayload(payloadAfter);
    expect(jwtOrgAfter, '切换后 JWT 应携带 current_org_id').toBeTruthy();
    expect(jwtOrgAfter).toBe(afterOrg);
  });

  test('课程体系页加载成功且不进入列表错误态（机构维度接口可用）', async ({
    page,
  }) => {
    await establishSession(page);
    if (
      await page.getByText('请返回微信小程序完成登录').isVisible().catch(() => false)
    ) {
      test.skip(true, '当前 unionid 会话未处于可用登录态');
    }

    await resolveOrgContextForCoursePage(page);

    await page.goto('/course', {
      waitUntil: 'domcontentloaded',
      timeout: 90_000,
    });
    await expect(page.locator('#app')).toBeVisible({ timeout: 90_000 });
    await waitForCourseRealmVisible(page);

    const listError = page.getByText('请求失败，点击重新加载');
    await expect(listError).toHaveCount(0, {
      timeout: 45_000,
    });
  });
});