import axios from 'axios'
import qs from 'query-string'
import type { AxiosError, AxiosInstance, AxiosRequestConfig, AxiosResponse } from 'axios'
import { useUserStore } from '@/stores'
import { getToken } from '@/utils/auth'
import modalErrorWrapper from '@/utils/modal-error-wrapper'
import messageErrorWrapper from '@/utils/message-error-wrapper'
import notificationErrorWrapper from '@/utils/notification-error-wrapper'
import router from '@/router'

interface ICodeMessage {
  [propName: number]: string
}

const StatusCodeMessage: ICodeMessage = {
  200: '服务器成功返回请求的数据',
  201: '新建或修改数据成功。',
  202: '一个请求已经进入后台排队（异步任务）',
  204: '删除数据成功',
  400: '请求错误(400)',
  401: '未授权，请重新登录(401)',
  403: '拒绝访问(403)',
  404: '请求出错(404)',
  408: '请求超时(408)',
  500: '服务器错误(500)',
  501: '服务未实现(501)',
  502: '网络错误(502)',
  503: '服务不可用(503)',
  504: '网络超时(504)',
}

const http: AxiosInstance = axios.create({
  baseURL: import.meta.env.VITE_API_PREFIX ?? import.meta.env.VITE_API_BASE_URL,
  timeout: 30 * 1000,
})

const handleError = (msg: string) => {
  if (msg.length >= 15) {
    return notificationErrorWrapper({
      content: msg || '服务器端错误',
      duration: 5 * 1000,
    })
  }
  return messageErrorWrapper({
    content: msg || '服务器端错误',
    duration: 5 * 1000,
  })
}

// 请求拦截器
http.interceptors.request.use(
  (config: AxiosRequestConfig) => {
    const token = getToken()
    if (token) {
      if (!config.headers) {
        config.headers = {}
      }
      config.headers.Authorization = `${token}`
    }
    return config
  },
  (error) => Promise.reject(error),
)

// 响应拦截器
http.interceptors.response.use(
  (response: AxiosResponse) => {
    const { data } = response
    // 兼容返回数据中使用rows字段的情况
    if (data && data.rows !== undefined && data.data === undefined) {
      data.data = data.rows
    }
    
    // 兼容不同的API响应结构
    const { success, code, msg } = data
    
    // 检查响应类型是否是blob
    if (response.request.responseType === 'blob') {
      const contentType = data.type
      if (contentType.startsWith('application/json')) {
        const reader = new FileReader()
        reader.readAsText(data)
        reader.onload = () => {
          try {
            const result = JSON.parse(reader.result as string)
            const isSuccess = result.success !== undefined ? result.success : (result.code === 200 || result.code === '200')
            if (!isSuccess) {
              handleError(result.msg || '操作失败')
            }
          } catch (error) {
            handleError('解析响应数据失败')
          }
        }
        return Promise.reject(msg)
      } else {
        return response
      }
    }
    
    // 判断请求是否成功：明确的success字段为true，或者code为200都视为成功
    const isSuccess = success !== undefined ? success : (code === 200 || code === '200')
    if (isSuccess) {
      return response
    }

    // Token 失效
    if (code === '401' && response.config.url !== '/auth/user/info') {
      modalErrorWrapper({
        title: '提示',
        content: msg,
        maskClosable: false,
        escToClose: false,
        okText: '重新登录',
        async onOk() {
          const userStore = useUserStore()
          await userStore.logoutCallBack()
          await router.replace('/login')
        },
      })
    } else {
      handleError(msg)
    }
    return Promise.reject(new Error(msg || '服务器端错误'))
  },
  (error: AxiosError) => {
    if (!error.response) {
      handleError('网络连接失败，请检查您的网络')
      return Promise.reject(error)
    }
    const status = error.response?.status
    const errorMsg = StatusCodeMessage[status] || '服务器暂时未响应，请刷新页面并重试。若无法解决，请联系管理员'
    handleError(errorMsg)
    return Promise.reject(error)
  },
)

const request = async <T = unknown>(config: AxiosRequestConfig): Promise<ApiRes<T>> => {
  return http.request<T>(config)
    .then((res: AxiosResponse) => {
      // 处理返回数据结构，兼容rows和data字段
      const responseData = res.data
      
      // 如果返回的数据中有rows字段但没有data字段，将rows赋值给data
      if (responseData.rows !== undefined && responseData.data === undefined) {
        responseData.data = responseData.rows
      }
      
      // 如果返回的code是200但没有设置success字段，将success设置为true
      if ((responseData.code === 200 || responseData.code === '200') && responseData.success === undefined) {
        responseData.success = true
      }
      
      return responseData
    })
    .catch((err: { msg: string }) => Promise.reject(err))
}

const requestNative = async <T = unknown>(config: AxiosRequestConfig): Promise<AxiosResponse> => {
  return http.request<T>(config)
    .then((res: AxiosResponse) => res)
    .catch((err: { msg: string }) => Promise.reject(err))
}

// 完全绕过拦截器的请求方法
const requestRaw = async <T = unknown>(config: AxiosRequestConfig): Promise<AxiosResponse> => {
  // 创建一个新的axios实例，不包含拦截器
  const rawAxios = axios.create({
    baseURL: import.meta.env.VITE_API_PREFIX ?? import.meta.env.VITE_API_BASE_URL,
    timeout: 30 * 1000,
  })
  
  // 只添加请求拦截器来设置token，不添加响应拦截器
  rawAxios.interceptors.request.use(
    (config: AxiosRequestConfig) => {
      const token = getToken()
      if (token) {
        if (!config.headers) {
          config.headers = {}
        }
        config.headers.Authorization = `${token}`
      }
      return config
    },
    (error) => Promise.reject(error),
  )
  
  return rawAxios.request<T>(config)
}

const createRequest = (method: string) => {
  return <T = any>(url: string, params?: object, config?: AxiosRequestConfig): Promise<ApiRes<T>> => {
    return request({
      method,
      url,
      [method === 'get' ? 'params' : 'data']: params,
      ...(method === 'get'
        ? {
            paramsSerializer: (obj) => qs.stringify(obj),
          }
        : {}),
      ...config,
    })
  }
}

const download = (url: string, params?: object, config?: AxiosRequestConfig): Promise<AxiosResponse> => {
  return requestNative({
    method: 'get',
    url,
    responseType: 'blob',
    params,
    paramsSerializer: (obj) => qs.stringify(obj),
    ...config,
  })
}

export default {
  get: createRequest('get'),
  post: createRequest('post'),
  put: createRequest('put'),
  patch: createRequest('patch'),
  del: createRequest('delete'),
  request,
  requestNative,
  requestRaw,
  download,
}