import axios, { AxiosRequestConfig, Canceler } from 'axios'
import Toast from '@/components/toast'

export const netErrMsg = '系统开小差了，请稍候再试'

interface RequestConfig extends AxiosRequestConfig {
  contentType?: 'json' | 'form'
  reportError?: boolean
  showLoading?: boolean
  cancelable?: boolean
}

interface ResponseData<T = any> {
  success: boolean
  results: T
  message: string
  [k: string]: any
}

const _axios = axios.create({
  baseURL: import.meta.env.VITE_API_BASE,
})
const cancelMethods: Record<string, Canceler> = {}

_axios.interceptors.request.use((config: RequestConfig) => {
  config.showLoading && Toast.loading()
  cancelMethods[config.url!]?.()
  delete cancelMethods[config.url!]
  if (config.cancelable) {
    config.cancelToken = new axios.CancelToken(
      c => (cancelMethods[config.url!] = c)
    )
  }
  if (
    config.method === 'post' &&
    config.contentType !== 'json' &&
    Object.prototype.toString.call(config.data) === '[object Object]'
  ) {
    config.data = new URLSearchParams(config.data)
  }

  return config
})

_axios.interceptors.response.use(
  response => {
    const config = response.config as RequestConfig
    config.showLoading && Toast.hide()
    const data = response.data as ResponseData | Blob | undefined
    if (!data || data instanceof Blob || data.success) return data
    config.reportError !== false && Toast(data.message || netErrMsg)
    return Promise.reject(data)
  },
  error => {
    Toast.hide()
    if (!axios.isCancel(error) && error.config?.reportError) {
      Toast(netErrMsg)
    }
    return Promise.reject(error)
  }
)

export default function request<T = any>(
  config: RequestConfig
): Promise<ResponseData<T>> {
  config.transformRequest = ([] as any[]).concat(
    config.transformRequest || [],
    axios.defaults.transformRequest
  )
  return _axios(config) as any
}

request.get = <T = any>(url: string, config?: RequestConfig) =>
  request<T>({ ...config, url })

request.post = <T = any>(url: string, data?: any, config?: RequestConfig) =>
  request<T>({ ...config, method: 'POST', url, data })