export enum ContentType {
  json = 'application/json;charset=UTF-8',
}

export enum HttpMethod {
  post = 'POST',
}

export interface IReqConfig {
  params?: any
  method?: string
  headers?: IHeader
  token?: string
  'Content-Type'?: string
}

export interface IHeader {
  'Content-Type'?: string
  'X-Requested-With'?: string
  token?: string
  [propName: string]: any
}

/**
 * 设置contentType
 * @param config
 */
const setContentType = (config?: IReqConfig): string => {
  if (config && config['Content-Type'] !== undefined)
    return config['Content-Type']
  else if (config && config.method === HttpMethod.post)
    return ContentType.json
  else
    return ContentType.json
}
/**
 * 设置请求 url
 * @param url
 */
const setRequestUrl = (url: string): string => {
  return `${import.meta.env.VITE_PROJECT_URL}${url.replace('//', '/')}`
}
/**
 * 设置请求头
 * @param contentType
 * @param config
 */
const setHeader = (contentType: string, config?: IReqConfig) => {
  const token = !config || config.token === undefined ? '' : config.token
  return new Headers({
    token,
    'Content-Type': contentType,
  } as IHeader)
}
/**
 * 请求拦截,这里你可以做一些操作
 */
export function interceptorsRequest(url: string, config: IReqConfig) {
  const contentType: string = setContentType(config)
  const reqUrl = setRequestUrl(url)
  const headers = setHeader(contentType, config)
  return {
    contentType,
    reqUrl,
    headers,
  }
}

/**
 * 响应拦截,这里你可以做一些操作
 */
export const interceptorsResponse = (res: Response, cb: Function) => {
  return cb(res)
}