// services/api/test/health.e2e-spec.ts
// e2e 冒烟：验证 e2e 工装（Nest testing module + supertest + 根 .env 加载）可用。
// 不监听端口：app.init() 后直接对 app.getHttpServer() 发请求。
// 应用级配置与 main-cn.ts 共用 src/shared/configure-app（P1a 终审修缮后收敛为
// 单一来源），故本 spec 对响应头/未知路由的断言即生产引导路径的行为：
//   · /health 基本形状 + x-request-id 回显/生成/超长替换；
//   · 未注册路由 → 404 信封 code=NOT_FOUND（终审修缮①：框架级 404 不再冒充
//     ALBUM_NOT_FOUND；业务 404 一律经 ApiException 显式携带域码）；
//   · 响应不暴露 x-powered-by 指纹头（终审修缮②）。
import { Test } from '@nestjs/testing';
import { type NestExpressApplication } from '@nestjs/platform-express';
import request from 'supertest';
import { AppCnModule } from '../src/app-cn.module';
import { API_PREFIX } from '../src/shared/constants';
import { configureApp } from '../src/shared/configure-app';
import { resetDb } from './reset';

describe(`e2e smoke: /${API_PREFIX}/health & framework defaults`, () => {
  let app: NestExpressApplication;

  beforeAll(async () => {
    await resetDb();
    const moduleRef = await Test.createTestingModule({
      imports: [AppCnModule],
    }).compile();
    app = moduleRef.createNestApplication<NestExpressApplication>();
    configureApp(app);
    await app.init();
  });

  afterAll(async () => {
    await app.close();
  });

  it('responds 200 {"status":"ok"}', async () => {
    const res = await request(app.getHttpServer()).get(`/${API_PREFIX}/health`);
    expect(res.status).toBe(200);
    expect(res.body).toEqual({ status: 'ok' });
  });

  it('sets x-request-id response header (generated when absent)', async () => {
    const res = await request(app.getHttpServer()).get(`/${API_PREFIX}/health`);
    const requestId = res.headers['x-request-id'];
    expect(typeof requestId).toBe('string');
    expect(requestId.length ?? 0).toBeGreaterThan(0);
  });

  it('echoes incoming x-request-id header', async () => {
    const res = await request(app.getHttpServer())
      .get(`/${API_PREFIX}/health`)
      .set('x-request-id', 'e2e-fixed-request-id');
    expect(res.headers['x-request-id']).toBe('e2e-fixed-request-id');
  });

  it('replaces an over-long incoming x-request-id (>128 chars) with a fresh one', async () => {
    const overlong = 'z'.repeat(200);
    const res = await request(app.getHttpServer())
      .get(`/${API_PREFIX}/health`)
      .set('x-request-id', overlong);
    const requestId = res.headers['x-request-id'];
    expect(typeof requestId).toBe('string');
    expect(requestId).not.toBe(overlong);
    expect((requestId as string).length).toBeLessThanOrEqual(128);
  });

  it('responds 404 error envelope with code NOT_FOUND for unknown routes', async () => {
    const res = await request(app.getHttpServer()).get(
      `/${API_PREFIX}/nonexistent-route`,
    );
    expect(res.status).toBe(404);
    expect(res.body).toMatchObject({
      code: 'NOT_FOUND',
      requestId: expect.any(String) as string,
    });
    expect(typeof res.body.message).toBe('string');
  });

  it('omits the x-powered-by response header', async () => {
    const res = await request(app.getHttpServer()).get(`/${API_PREFIX}/health`);
    expect(res.headers['x-powered-by']).toBeUndefined();
  });
});