/**
 * 独立API测试模块 - 纯TypeScript/JavaScript
 * 可以直接在浏览器控制台或Node.js中运行
 * 不依赖Vite别名或前端代理配置
 * 直接调用后端API服务
 */

interface ProjectInfo {
  id: string
  name: string
  description: string
  path: string
  tenant_id: string
  creator: string
  created_at: string
}

interface HealthCheckResponse {
  healthy: boolean
  version: string
  [key: string]: any
}

interface TestResult {
  success: boolean
  duration: number
  data?: any
  error?: string
}

/**
 * 配置
 */
const CONFIG = {
  // 后端API基础URL
  BACKEND_BASE_URL: 'http://localhost:8020',
  // API前缀
  API_PREFIX: '/api',
  // 超时时间（毫秒）
  TIMEOUT: 10000,
}

/**
 * 获取完整的API URL
 */
function getApiUrl(endpoint: string): string {
  // 确保endpoint以/开头
  const normalizedEndpoint = endpoint.startsWith('/') ? endpoint : `/${endpoint}`
  return `${CONFIG.BACKEND_BASE_URL}${CONFIG.API_PREFIX}${normalizedEndpoint}`
}

/**
 * 发起API请求
 */
async function apiRequest<T = any>(
  method: string,
  endpoint: string,
  data?: any
): Promise<T> {
  const url = getApiUrl(endpoint)
  const controller = new AbortController()
  const timeoutId = setTimeout(() => controller.abort(), CONFIG.TIMEOUT)

  try {
    const response = await fetch(url, {
      method,
      headers: {
        'Content-Type': 'application/json',
        'Accept': 'application/json',
      },
      body: data ? JSON.stringify(data) : undefined,
      signal: controller.signal,
    })

    clearTimeout(timeoutId)

    if (!response.ok) {
      let errorMessage = `HTTP ${response.status}`
      try {
        const errorData = await response.json()
        errorMessage += `: ${JSON.stringify(errorData)}`
      } catch {
        // 忽略JSON解析错误
      }
      throw new Error(errorMessage)
    }

    const responseData = await response.json()
    
    // 处理后端返回格式（假设是 {success: true, data: ...} 或直接是数据）
    if (responseData.success !== undefined) {
      if (!responseData.success) {
        throw new Error(responseData.message || responseData.error || '请求失败')
      }
      return responseData.data || responseData
    }
    
    return responseData
  } catch (error: any) {
    clearTimeout(timeoutId)
    if (error.name === 'AbortError') {
      throw new Error(`请求超时 (${CONFIG.TIMEOUT}ms)`)
    }
    throw error
  }
}

/**
 * API函数 - 测试专用（直接调用后端）
 */
export const testApi = {
  /**
   * 获取项目列表
   */
  async getProjects(): Promise<ProjectInfo[]> {
    return apiRequest<ProjectInfo[]>('GET', '/projects')
  },

  /**
   * 健康检查
   */
  async checkHealth(): Promise<HealthCheckResponse> {
    return apiRequest<HealthCheckResponse>('GET', '/health')
  },

  /**
   * 测试连接
   */
  async testConnection(timeoutMs: number = 5000): Promise<TestResult> {
    const startTime = Date.now()
    
    try {
      const controller = new AbortController()
      const timeoutId = setTimeout(() => controller.abort(), timeoutMs)
      
      const response = await fetch(getApiUrl('/health'), {
        signal: controller.signal,
      })
      
      clearTimeout(timeoutId)
      
      if (!response.ok) {
        throw new Error(`HTTP ${response.status}`)
      }
      
      const data = await response.json()
      const duration = Date.now() - startTime
      
      return {
        success: true,
        duration,
        data
      }
    } catch (error: any) {
      const duration = Date.now() - startTime
      return {
        success: false,
        duration,
        error: error.message || '未知错误'
      }
    }
  },
}

/**
 * 测试函数
 */
export async function testGetProjects(): Promise<boolean> {
  console.log('🧪 开始测试 getProjects API (直接调用后端)...')
  console.log(`   后端URL: ${CONFIG.BACKEND_BASE_URL}`)
  console.log(`   API端点: ${getApiUrl('/projects')}`)
  
  try {
    const projects = await testApi.getProjects()
    
    console.log(`✅ 测试成功！获取到 ${projects.length} 个项目`)
    
    if (projects.length > 0) {
      console.log('   项目列表:')
      projects.forEach((project: ProjectInfo, index: number) => {
        console.log(`     ${index + 1}. ${project.name} (ID: ${project.id})`)
        console.log(`         描述: ${project.description}`)
        console.log(`         路径: ${project.path}`)
      })
    } else {
      console.log('⚠️  警告: 项目列表为空')
    }
    
    return true
  } catch (error: any) {
    console.error('❌ 测试失败:', error.message || error)
    console.error('   请检查:')
    console.error('   1. 后端服务是否运行在端口8020')
    console.error('   2. 网络连接是否正常')
    console.error('   3. 跨域设置是否正确')
    return false
  }
}

export async function testHealthCheck(): Promise<boolean> {
  console.log('🧪 开始测试健康检查 API...')
  console.log(`   后端URL: ${CONFIG.BACKEND_BASE_URL}`)
  console.log(`   API端点: ${getApiUrl('/health')}`)
  
  try {
    const health = await testApi.checkHealth()
    
    console.log(`✅ 健康检查成功！`)
    console.log(`   健康状态: ${health.healthy ? '健康' : '不健康'}`)
    console.log(`   版本: ${health.version}`)
    
    if (!health.healthy) {
      console.warn('⚠️  警告: 后端报告不健康状态')
    }
    
    return true
  } catch (error: any) {
    console.error('❌ 健康检查失败:', error.message || error)
    return false
  }
}

export async function testBackendConnection(): Promise<boolean> {
  console.log('🧪 开始测试后端连接...')
  console.log(`   后端URL: ${CONFIG.BACKEND_BASE_URL}`)
  
  try {
    const result = await testApi.testConnection(3000)
    
    if (result.success) {
      console.log(`✅ 连接测试成功！`)
      console.log(`   响应时间: ${result.duration}ms`)
      console.log(`   健康状态: ${result.data?.healthy ? '健康' : '不健康'}`)
      return true
    } else {
      console.error(`❌ 连接测试失败: ${result.error}`)
      return false
    }
  } catch (error: any) {
    console.error('❌ 连接测试异常:', error.message || error)
    return false
  }
}

/**
 * 运行所有测试
 */
export async function runAllTests() {
  console.log('='.repeat(60))
  console.log('🚀 开始运行独立API测试 (直接调用后端)')
  console.log('='.repeat(60))
  console.log(`后端服务: ${CONFIG.BACKEND_BASE_URL}`)
  console.log(`API前缀: ${CONFIG.API_PREFIX}`)
  console.log('='.repeat(60))
  
  const results = {
    healthCheck: false,
    connection: false,
    getProjects: false,
  }
  
  // 测试健康检查
  results.healthCheck = await testHealthCheck()
  
  // 测试连接
  results.connection = await testBackendConnection()
  
  // 测试获取项目列表
  if (results.connection) {
    results.getProjects = await testGetProjects()
  } else {
    console.log('⏭️  跳过项目列表测试（连接测试失败）')
  }
  
  console.log('='.repeat(60))
  console.log('📊 测试结果汇总:')
  console.log('='.repeat(60))
  console.log(`健康检查: ${results.healthCheck ? '✅ 通过' : '❌ 失败'}`)
  console.log(`连接测试: ${results.connection ? '✅ 通过' : '❌ 失败'}`)
  console.log(`获取项目: ${results.getProjects ? '✅ 通过' : results.connection ? '❌ 失败' : '⏭️  跳过'}`)
  
  const allPassed = Object.values(results).every(result => result === true)
  console.log(`\n${allPassed ? '🎉 所有测试通过！' : '⚠️  部分测试失败'}`)
  
  return allPassed
}

/**
 * 浏览器控制台快捷方式
 */
if (typeof window !== 'undefined') {
  // 在浏览器控制台中可以使用 window.testAPI 来运行测试
  ;(window as any).testAPI = {
    runAllTests,
    testGetProjects,
    testHealthCheck,
    testBackendConnection,
    testApi,
  }
  
  console.log(`
🛠️  API测试工具已加载！
在浏览器控制台中输入以下命令进行测试:

1. testAPI.runAllTests()          - 运行所有测试
2. testAPI.testGetProjects()      - 测试项目列表API
3. testAPI.testHealthCheck()      - 测试健康检查API
4. testAPI.testBackendConnection() - 测试后端连接
5. testAPI.testApi.getProjects()  - 直接调用API函数

后端配置:
- URL: ${CONFIG.BACKEND_BASE_URL}
- API前缀: ${CONFIG.API_PREFIX}
`)
}

/**
 * Node.js环境支持
 */
if (typeof module !== 'undefined' && module.exports) {
  module.exports = {
    runAllTests,
    testGetProjects,
    testHealthCheck,
    testBackendConnection,
    testApi,
  }
}

export default {
  runAllTests,
  testGetProjects,
  testHealthCheck,
  testBackendConnection,
  testApi,
}