import axios from 'axios'
import { ElMessage } from 'element-plus'
import router from '@/router'
import { encrypt, decrypt } from './sm4'

const service = axios.create({
  baseURL: import.meta.env.VITE_API_BASE_URL || '/api',
  timeout: 30000
})

service.interceptors.request.use(
  config => {
    const token = localStorage.getItem('token')
    if (token) {
      config.headers.Authorization = `Bearer ${token}`
    }
    if (config.method === 'post' || config.method === 'put') {
      const data = typeof config.data === 'string' ? config.data : JSON.stringify(config.data)
      config.data = { data: encrypt(data) }
    }
    return config
  },
  error => {
    return Promise.reject(error)
  }
)

service.interceptors.response.use(
  response => {
    const res = response.data
    if (response.config.responseType === 'blob') {
      return res
    }
    if (res.code !== 200 && res.code !== 0) {
      ElMessage.error(res.message || '请求失败')
      return Promise.reject(new Error(res.message || '请求失败'))
    }
    if (res.data && typeof res.data === 'string') {
      try {
        res.data = JSON.parse(decrypt(res.data))
      } catch (e) {
      }
    }
    return res
  },
  error => {
    if (error.response) {
      switch (error.response.status) {
        case 401:
          ElMessage.error('登录已过期，请重新登录')
          localStorage.removeItem('token')
          router.push('/login')
          break
        case 403:
          ElMessage.error('没有权限访问')
          break
        case 404:
          ElMessage.error('请求资源不存在')
          break
        case 500:
          router.push('/500')
          break
        default:
          ElMessage.error(error.message || '网络错误')
      }
    } else {
      ElMessage.error('网络连接失败')
    }
    return Promise.reject(error)
  }
)

export default service

export const request = {
  get: (url, params, config = {}) => service.get(url, { params, ...config }),
  post: (url, data, config = {}) => service.post(url, data, config),
  put: (url, data, config = {}) => service.put(url, data, config),
  delete: (url, params, config = {}) => service.delete(url, { params, ...config }),
  download: (url, data, config = {}) => service.post(url, data, { responseType: 'blob', ...config }),
  upload: (url, data, config = {}) => {
    const formData = new FormData()
    Object.keys(data).forEach(key => formData.append(key, data[key]))
    return service.post(url, formData, { headers: { 'Content-Type': 'multipart/form-data' }, ...config })
  }
}