/**
 * 订阅管理 E2E 测试
 *
 * 覆盖：路由守卫、订阅降级、过期处理、订阅状态检查
 */
import { expect, test } from '@playwright/test';

const PASSWORD = 'Test123456!';
const apiBase = process.env.E2E_API_BASE || '/api/v1';

function uniqueEmail(prefix: string): string {
  return `${prefix}_${Date.now()}_${Math.random().toString(36).slice(2, 8)}@example.com`;
}

function uniqueUsername(prefix: string): string {
  return `${prefix}_${Date.now().toString(36)}${Math.random().toString(36).slice(2, 6)}`;
}

/** 注册并登录，返回 { headers, email, username, userId } */
async function createAuthedUser(request: any, label: string) {
  const email = uniqueEmail(label);
  const username = uniqueUsername(label);

  const reg = await request.post(`${apiBase}/auth/register`, {
    data: { email, password: PASSWORD, username, display_name: `E2E ${label}` },
  });
  expect(reg.ok(), `注册应成功: ${await reg.text()}`).toBeTruthy();

  const login = await request.post(`${apiBase}/auth/login`, {
    data: { email, password: PASSWORD },
  });
  expect(login.ok(), `登录应成功: ${await login.text()}`).toBeTruthy();
  const loginData = await login.json();

  return {
    headers: { Authorization: `Bearer ${loginData.access_token}` },
    email,
    username,
  };
}

test.describe('Subscription route guard', () => {
  test('redirects anonymous users to login', async ({ page }) => {
    await page.goto('/subscription');
    await expect(page).toHaveURL(/\/login/);
  });
});

test.describe('订阅信息查看', () => {
  test('获取当前订阅信息 - 正向', async ({ request }) => {
    const { headers } = await createAuthedUser(request, 'sub-info');

    const response = await request.get(`${apiBase}/subscription/current`, { headers });

    expect(response.ok(), `获取订阅信息应返回 2xx，实际: ${response.status()} ${await response.text()}`).toBeTruthy();

    const data = await response.json();
    expect(data.plan_id, '应返回 plan_id').toBeTruthy();
    expect(data.status, '应返回 status').toBeTruthy();
  });

  test('未登录获取订阅信息 - 反向', async ({ request }) => {
    const response = await request.get(`${apiBase}/subscription/current`);
    expect([401, 403]).toContain(response.status());
  });
});

test.describe('订阅降级', () => {
  test('Pro 用户降级到 Standard - 正向', async ({ request }) => {
    const { headers } = await createAuthedUser(request, 'sub-downgrade');

    // 先升级到 Pro
    const upgrade = await request.post(`${apiBase}/subscription/change-plan`, {
      headers,
      data: {
        target_plan_id: 'pro',
        billing_cycle: 'monthly',
      },
    });
    expect(upgrade.ok(), `升级到 Pro 应成功: ${await upgrade.text()}`).toBeTruthy();

    // 降级到 Standard
    const downgrade = await request.post(`${apiBase}/subscription/change-plan`, {
      headers,
      data: {
        target_plan_id: 'standard',
        billing_cycle: 'monthly',
      },
    });

    // 降级应成功或返回提示信息（某些业务可能限制降级）
    expect(downgrade.status(), '降级请求应返回 2xx 或 4xx').toBeLessThan(500);

    const data = await downgrade.json();
    // 成功或失败都应有明确响应
    expect(data).toBeTruthy();
  });

  test('降级到相同套餐 - 反向', async ({ request }) => {
    const { headers } = await createAuthedUser(request, 'sub-same');

    // 用户默认为 free，再次选择 free
    const response = await request.post(`${apiBase}/subscription/change-plan`, {
      headers,
      data: {
        target_plan_id: 'free',
        billing_cycle: 'monthly',
      },
    });

    // 相同套餐应返回 200 + success=false，或者 400
    if (response.ok()) {
      const data = await response.json();
      expect(data.success).toBe(false);
    } else {
      expect([400, 422]).toContain(response.status());
    }
  });

  test('降级到无效套餐 - 反向', async ({ request }) => {
    const { headers } = await createAuthedUser(request, 'sub-badplan');

    const response = await request.post(`${apiBase}/subscription/change-plan`, {
      headers,
      data: {
        target_plan_id: 'nonexistent_plan',
        billing_cycle: 'monthly',
      },
    });

    expect(response.status(), '无效套餐应返回 4xx').toBeGreaterThanOrEqual(400);
    expect(response.status()).toBeLessThan(500);
  });
});

test.describe('订阅过期处理', () => {
  test('取消订阅 - 反向（免费用户）', async ({ request }) => {
    const { headers } = await createAuthedUser(request, 'sub-cancel');

    // 免费用户取消订阅应返回错误
    const response = await request.post(`${apiBase}/subscription/cancel`, { headers });

    // 免费用户可能不需要取消，返回 400 或类似错误
    if (!response.ok()) {
      const data = await response.json();
      expect(data.detail || data.message, '应返回错误信息').toBeTruthy();
    }
  });

  test('未登录取消订阅 - 反向', async ({ request }) => {
    const response = await request.post(`${apiBase}/subscription/cancel`);
    expect([401, 403]).toContain(response.status());
  });

  test('切换自动续费 - 正向', async ({ request }) => {
    const { headers } = await createAuthedUser(request, 'sub-autorenew');

    // 关闭自动续费
    const disableResp = await request.post(`${apiBase}/subscription/toggle-auto-renew`, {
      headers,
      data: { enabled: false },
    });
    expect(disableResp.ok(), `关闭自动续费应成功: ${await disableResp.text()}`).toBeTruthy();

    // 重新开启自动续费
    const enableResp = await request.post(`${apiBase}/subscription/toggle-auto-renew`, {
      headers,
      data: { enabled: true },
    });
    expect(enableResp.ok(), `开启自动续费应成功: ${await enableResp.text()}`).toBeTruthy();
  });

  test('无效参数切换自动续费 - 反向', async ({ request }) => {
    const { headers } = await createAuthedUser(request, 'sub-autoren-bad');

    // 缺少 enabled 字段
    const response = await request.post(`${apiBase}/subscription/toggle-auto-renew`, {
      headers,
      data: {},
    });

    expect([400, 422]).toContain(response.status());
  });
});

test.describe('账单记录', () => {
  test('获取账单记录 - 正向', async ({ request }) => {
    const { headers } = await createAuthedUser(request, 'sub-bills');

    const response = await request.get(`${apiBase}/subscription/billing-records`, { headers });

    expect(response.ok(), `获取账单记录应返回 2xx，实际: ${response.status()}`).toBeTruthy();

    const data = await response.json();
    expect(Array.isArray(data), '账单记录应为数组').toBeTruthy();
  });

  test('未登录获取账单记录 - 反向', async ({ request }) => {
    const response = await request.get(`${apiBase}/subscription/billing-records`);
    expect([401, 403]).toContain(response.status());
  });
});