/**
 * T005: 契约测试 IUniversalHttpClient.request()
 *
 * 这个测试将验证 IUniversalHttpClient.request() 方法的契约是否正确实现
 *
 * 重要：按照TDD原则，这个测试现在必须失败，因为实现还不存在
 */

import { describe, test, expect, beforeEach, afterEach } from '@jest/globals'

// 导入接口定义（这些应该在contracts中定义的类型）
interface IUniversalHttpClient {
  request<T = any>(request: HttpClientRequest): Promise<HttpClientResponse<T>>
  batchRequest<T = any>(requests: HttpClientRequest[]): Promise<HttpClientResponse<T>[]>
  registerPlatform(platform: string, adapter: IPlatformAdapter): void
  getHealth(): Promise<HealthStatus>
  close(): Promise<void>
}

interface HttpClientRequest {
  platform: string
  accountId: string
  method: 'GET' | 'POST' | 'PUT' | 'DELETE' | 'PATCH'
  url: string
  headers?: Record<string, string>
  body?: any
  options?: RequestOptions
}

interface RequestOptions {
  timeout?: TimeoutConfig
  retry?: RetryConfig
  proxy?: ProxyControlOptions
  logSensitiveData?: boolean
  idempotencyKey?: string
}

interface TimeoutConfig {
  connect?: number
  read?: number
  write?: number
}

interface RetryConfig {
  maxAttempts?: number
  delay?: number
  exponentialBackoff?: boolean
  shouldRetry?: (error: any) => boolean
}

interface ProxyControlOptions {
  enabled?: boolean
  forceProxy?: any
  disableProxy?: boolean
  strategy?: 'global' | 'account' | 'force' | 'disabled'
}

interface HttpClientResponse<T = any> {
  status: number
  statusText: string
  ok: boolean
  data: T
  headers: Record<string, string>
  metadata: ResponseMetadata
}

interface ResponseMetadata {
  requestId: string
  duration: number
  retryCount: number
  usedProxy: boolean
  proxyUsed?: string
  timestamp: Date
  platform: string
}

interface IPlatformAdapter {
  readonly platform: string
  readonly baseUrl: string
  request<T = any>(request: any): Promise<any>
}

interface HealthStatus {
  status: 'healthy' | 'degraded' | 'unhealthy'
  platforms: Record<string, any>
  metrics: any
}

// 导入实现（这应该会失败，因为实现还不存在）
let UniversalHttpClient: any

try {
  // 尝试从现有的HTTP客户端库导入
  UniversalHttpClient = require('../../libs/http-client/src/index.js').UniversalHttpClient
} catch (error) {
  // 如果从库导入失败，尝试从src目录导入
  try {
    UniversalHttpClient = require('../../src/utils/universalHttpClient.js').UniversalHttpClient
  } catch (error2) {
    // 预期的失败：实现还不存在
    UniversalHttpClient = undefined
  }
}

describe('IUniversalHttpClient.request() 契约测试', () => {
  let httpClient: IUniversalHttpClient
  let mockPlatformAdapter: IPlatformAdapter

  beforeEach(() => {
    // 创建模拟平台适配器
    mockPlatformAdapter = {
      platform: 'test-platform',
      baseUrl: 'https://api.test-platform.com',
      request: jest.fn().mockResolvedValue({
        status: 200,
        data: { message: 'success' },
        headers: { 'content-type': 'application/json' },
        metadata: {
          platform: 'test-platform',
          requestId: 'test-123',
          serverTime: new Date(),
          rateLimit: undefined,
          platformData: {}
        }
      })
    }

    // 如果实现存在，创建客户端实例
    if (UniversalHttpClient) {
      httpClient = new UniversalHttpClient()
      httpClient.registerPlatform('test-platform', mockPlatformAdapter)
    }
  })

  afterEach(async () => {
    if (httpClient && httpClient.close) {
      await httpClient.close()
    }
  })

  test('应该存在 UniversalHttpClient 类', () => {
    // 这个测试现在应该失败
    expect(UniversalHttpClient).toBeDefined()
    expect(typeof UniversalHttpClient).toBe('function')
  })

  test('应该实现 IUniversalHttpClient 接口', () => {
    if (!UniversalHttpClient) {
      expect(UniversalHttpClient).toBeDefined() // 强制失败
      return
    }

    const client = new UniversalHttpClient()

    // 验证必需方法存在
    expect(typeof client.request).toBe('function')
    expect(typeof client.batchRequest).toBe('function')
    expect(typeof client.registerPlatform).toBe('function')
    expect(typeof client.getHealth).toBe('function')
    expect(typeof client.close).toBe('function')
  })

  test('request() 应该处理基本的GET请求', async () => {
    if (!httpClient) {
      expect(httpClient).toBeDefined() // 强制失败
      return
    }

    const request: HttpClientRequest = {
      platform: 'test-platform',
      accountId: 'test-account',
      method: 'GET',
      url: '/api/v1/test'
    }

    const response = await httpClient.request(request)

    // 验证响应结构符合契约
    expect(response).toHaveProperty('status')
    expect(response).toHaveProperty('statusText')
    expect(response).toHaveProperty('ok')
    expect(response).toHaveProperty('data')
    expect(response).toHaveProperty('headers')
    expect(response).toHaveProperty('metadata')

    // 验证元数据结构
    expect(response.metadata).toHaveProperty('requestId')
    expect(response.metadata).toHaveProperty('duration')
    expect(response.metadata).toHaveProperty('retryCount')
    expect(response.metadata).toHaveProperty('usedProxy')
    expect(response.metadata).toHaveProperty('timestamp')
    expect(response.metadata).toHaveProperty('platform')
    expect(response.metadata.platform).toBe('test-platform')
  })

  test('request() 应该处理带请求体的POST请求', async () => {
    if (!httpClient) {
      expect(httpClient).toBeDefined() // 强制失败
      return
    }

    const request: HttpClientRequest = {
      platform: 'test-platform',
      accountId: 'test-account',
      method: 'POST',
      url: '/api/v1/orders',
      headers: {
        'Content-Type': 'application/json'
      },
      body: {
        symbol: 'BTC-USD',
        side: 'buy',
        amount: 0.001
      }
    }

    const response = await httpClient.request(request)

    expect(response.status).toBe(200)
    expect(response.ok).toBe(true)
    expect(response.data).toBeDefined()
  })

  test('request() 应该支持超时配置', async () => {
    if (!httpClient) {
      expect(httpClient).toBeDefined() // 强制失败
      return
    }

    const request: HttpClientRequest = {
      platform: 'test-platform',
      accountId: 'test-account',
      method: 'GET',
      url: '/api/v1/slow-endpoint',
      options: {
        timeout: {
          connect: 5000,
          read: 30000,
          write: 15000
        }
      }
    }

    // 这应该不会抛出错误（模拟快速响应）
    const response = await httpClient.request(request)
    expect(response.status).toBe(200)
  })

  test('request() 应该支持重试配置', async () => {
    if (!httpClient) {
      expect(httpClient).toBeDefined() // 强制失败
      return
    }

    const request: HttpClientRequest = {
      platform: 'test-platform',
      accountId: 'test-account',
      method: 'GET',
      url: '/api/v1/test',
      options: {
        retry: {
          maxAttempts: 3,
          delay: 1000,
          exponentialBackoff: true
        }
      }
    }

    const response = await httpClient.request(request)
    expect(response.metadata.retryCount).toBeGreaterThanOrEqual(0)
  })

  test('request() 应该支持代理控制选项', async () => {
    if (!httpClient) {
      expect(httpClient).toBeDefined() // 强制失败
      return
    }

    const request: HttpClientRequest = {
      platform: 'test-platform',
      accountId: 'test-account',
      method: 'GET',
      url: '/api/v1/test',
      options: {
        proxy: {
          enabled: true,
          strategy: 'global'
        }
      }
    }

    const response = await httpClient.request(request)
    expect(response.metadata).toHaveProperty('usedProxy')
  })

  test('request() 应该支持幂等性键', async () => {
    if (!httpClient) {
      expect(httpClient).toBeDefined() // 强制失败
      return
    }

    const idempotencyKey = 'test-key-' + Date.now()
    const request: HttpClientRequest = {
      platform: 'test-platform',
      accountId: 'test-account',
      method: 'POST',
      url: '/api/v1/orders',
      body: { symbol: 'BTC-USD' },
      options: {
        idempotencyKey
      }
    }

    const response = await httpClient.request(request)
    expect(response.status).toBe(200)
  })

  test('request() 应该在未注册平台时抛出错误', async () => {
    if (!httpClient) {
      expect(httpClient).toBeDefined() // 强制失败
      return
    }

    const request: HttpClientRequest = {
      platform: 'unknown-platform',
      accountId: 'test-account',
      method: 'GET',
      url: '/api/v1/test'
    }

    await expect(httpClient.request(request)).rejects.toThrow()
  })

  test('request() 应该在无效请求时抛出错误', async () => {
    if (!httpClient) {
      expect(httpClient).toBeDefined() // 强制失败
      return
    }

    const invalidRequest = {
      platform: 'test-platform',
      // 缺少必需字段
      method: 'GET'
    } as HttpClientRequest

    await expect(httpClient.request(invalidRequest)).rejects.toThrow()
  })

  test('request() 响应应该包含正确的状态码和数据类型', async () => {
    if (!httpClient) {
      expect(httpClient).toBeDefined() // 强制失败
      return
    }

    const request: HttpClientRequest = {
      platform: 'test-platform',
      accountId: 'test-account',
      method: 'GET',
      url: '/api/v1/test'
    }

    const response = await httpClient.request(request)

    expect(typeof response.status).toBe('number')
    expect(typeof response.statusText).toBe('string')
    expect(typeof response.ok).toBe('boolean')
    expect(response.headers).toEqual(expect.any(Object))
    expect(response.metadata.timestamp).toBeInstanceOf(Date)
    expect(typeof response.metadata.duration).toBe('number')
  })
})