import { Test, TestingModule } from '@nestjs/testing';
import { INestApplication } from '@nestjs/common';
import request from 'supertest';
import { HealthzController } from '../src/core/health/healthzController';
import { HealthService } from '../src/core/health/healthService';

// 使用最小化测试应用，避免引入 AppModule 的外部依赖（DB/Redis/Kafka 等）
describe('Health Endpoints (e2e)', () => {
  let app: INestApplication;

  beforeAll(async () => {
    const moduleFixture: TestingModule = await Test.createTestingModule({
      controllers: [HealthzController],
      providers: [
        {
          provide: HealthService,
          useValue: {
            // 模拟健康检查，保证端点可用
            check: jest.fn(async () => ({ status: 'ok' })),
            detailedCheck: jest.fn(async () => [
              { name: 'database', status: 'up' },
              { name: 'queue', status: 'up' },
              { name: 'eventBus', status: 'up' },
              { name: 'cache', status: 'up' },
            ]),
            checkDatabase: jest.fn(async () => ({ status: 'up' })),
          },
        },
      ],
    }).compile();

    app = moduleFixture.createNestApplication();
    await app.init();
  });

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

  it('GET /healthz should be public and return 200 or 503 with JSON body', async () => {
    const res = await request(app.getHttpServer()).get('/healthz');
    expect([200, 503]).toContain(res.status);
    expect(res.headers['content-type']).toMatch(/json/);
    expect(res.body).toHaveProperty('status');
  });

  it('GET /readyz should be public and return 200 or 503 with JSON body', async () => {
    const res = await request(app.getHttpServer()).get('/readyz');
    expect([200, 503]).toContain(res.status);
    expect(res.headers['content-type']).toMatch(/json/);
    expect(res.body).toHaveProperty('status');
  });

  it('GET /health/livez alias should respond', async () => {
    const res = await request(app.getHttpServer()).get('/health/livez');
    expect([200, 503]).toContain(res.status);
  });

  it('GET /health/readyz alias should respond', async () => {
    const res = await request(app.getHttpServer()).get('/health/readyz');
    expect([200, 503]).toContain(res.status);
  });

  it('GET /startupz should be public and return 200 or 503 with JSON body', async () => {
    const res = await request(app.getHttpServer()).get('/startupz');
    expect([200, 503]).toContain(res.status);
    expect(res.headers['content-type']).toMatch(/json/);
    expect(res.body).toHaveProperty('status');
  });
});