import axios, { type AxiosInstance, type AxiosRequestConfig, type AxiosResponse } from 'axios'
import { ElMessage, ElMessageBox } from 'element-plus'
import { useUserStore } from '@/stores/modules/user'
import router from '@/router'

// 创建axios实例
const service: AxiosInstance = axios.create({
  baseURL: import.meta.env.VITE_API_BASE_URL,
  timeout: 10000,
  headers: {
    'Content-Type': 'application/json;charset=UTF-8'
  }
})

console.log('Axios实例创建，baseURL:', import.meta.env.VITE_API_BASE_URL)

// 请求拦截器
service.interceptors.request.use(
  (config: any) => {
    console.log('请求拦截器 - 请求配置:', {
      url: config.url,
      baseURL: config.baseURL,
      method: config.method,
      params: config.params,
      headers: config.headers
    })
    
    const userStore = useUserStore()
    
    // 添加token到请求头
    if (userStore.token) {
      config.headers = config.headers || {}
      config.headers['Authorization'] = `Bearer ${userStore.token}`
    }
    
    return config
  },
  (error) => {
    console.error('请求错误:', error)
    return Promise.reject(error)
  }
)

// 响应拦截器
service.interceptors.response.use(
  (response: AxiosResponse) => {
    const { code, message, data } = response.data
    
    // 请求成功
    if (code === 200) {
      return data
    }
    
    // 业务错误
    ElMessage.error(message || '请求失败')
    return Promise.reject(new Error(message || '请求失败'))
  },
  (error) => {
    console.error('响应错误:', error)
    
    let message = '网络错误'
    
    if (error.response) {
      const { status, data } = error.response
      
      switch (status) {
        case 401:
          message = '未授权，请重新登录'
          // 清除token并跳转到登录页
          const userStore = useUserStore()
          userStore.logout()
          router.push('/login')
          break
        case 403:
          message = '拒绝访问'
          break
        case 404:
          message = '请求地址出错'
          break
        case 408:
          message = '请求超时'
          break
        case 500:
          message = '服务器内部错误'
          break
        case 501:
          message = '服务未实现'
          break
        case 502:
          message = '网关错误'
          break
        case 503:
          message = '服务不可用'
          break
        case 504:
          message = '网关超时'
          break
        case 505:
          message = 'HTTP版本不受支持'
          break
        default:
          message = data?.message || `连接错误${status}`
      }
    } else if (error.code === 'ECONNABORTED') {
      message = '请求超时'
    } else if (error.message.includes('Network Error')) {
      message = '网络连接异常'
    }
    
    ElMessage.error(message)
    return Promise.reject(error)
  }
)

// 请求方法封装
export const request = {
  get<T = any>(url: string, params?: any): Promise<T> {
    console.log('Request GET:', url, params)
    return service.get(url, { params })
  },
  
  post<T = any>(url: string, data?: any): Promise<T> {
    return service.post(url, data)
  },
  
  put<T = any>(url: string, data?: any): Promise<T> {
    return service.put(url, data)
  },
  
  delete<T = any>(url: string, params?: any): Promise<T> {
    return service.delete(url, { params })
  },
  
  upload<T = any>(url: string, file: File, onProgress?: (progress: number) => void): Promise<T> {
    const formData = new FormData()
    formData.append('file', file)
    
    return service.post(url, formData, {
      headers: {
        'Content-Type': 'multipart/form-data'
      },
      onUploadProgress: (progressEvent) => {
        if (onProgress && progressEvent.total) {
          const progress = Math.round((progressEvent.loaded * 100) / progressEvent.total)
          onProgress(progress)
        }
      }
    })
  },
  
  download(url: string, filename?: string): Promise<void> {
    return service.get(url, {
      responseType: 'blob'
    }).then((response) => {
      const blob = new Blob([response.data])
      const downloadUrl = window.URL.createObjectURL(blob)
      const link = document.createElement('a')
      link.href = downloadUrl
      link.download = filename || 'download'
      document.body.appendChild(link)
      link.click()
      document.body.removeChild(link)
      window.URL.revokeObjectURL(downloadUrl)
    })
  }
}

export default service