import fetch from 'dva/fetch';
import { message, notification } from 'antd';
import router from 'umi/router';
import hash from 'hash.js';
import { isAntdPro, getToken, GetTokenFromUrl, storeToken } from './utils';

// var apiUrl = "http://oraysmart.com:8888"
// var apiUrl = "http://120.55.44.4:8900"

//节流阀
let flag = false;
let tokenFlag = false;
const checkStatus = response => {
  if (response.status >= 200 && response.status < 300) {
    return response;
  }
  // if (
  //   response.status == 400 ||
  //   response.status == 401 ||
  //   response.status == 601 ||
  //   response.status == 602
  // ) {
  //   response
  //     .json()
  //     .then(body => {
  //       notification.error({
  //         message: '错误',
  //         description: `${body.msg}-${body.data}: ${response.url}`,
  //       });
  //     })
  //     .catch(err => {
  //       notification.error({
  //         message: '错误',
  //         description: 'token失效，请重新登录',
  //       });
  //     });
  //   return response;
  // }

  // if (response.status === 600) {
  //   return response;
  // }

  const error = new Error(response.data);
  error.name = response.status;
  error.response = response;
  console.error(error);
  // throw error;
  return Promise.reject();
};

const cachedSave = response => {
  if (response.status === 600) return response;
  /**
   * Clone a response data and store it in sessionStorage
   * Does not support data other than json, Cache only json
   */
  const contentType = response.headers.get('Content-Type');
  if (contentType && contentType.match(/application\/json/i)) {
    // All data is saved as text
    response
      .clone()
      .text()
      .then(() => {
        // sessionStorage.setItem(hashcode, content);
        // sessionStorage.setItem(`${hashcode}:timestamp`, Date.now());
      });
  }
  return response;
};

/**
 * Requests a URL, returning a promise.
 *
 * @param  {string} url       The URL we want to request
 * @param  {object} [option] The options we want to pass to "fetch"
 * @return {object}           An object containing either "data" or "err"
 */
export default function request(url, option, jwt) {
  const number = new Date().getTime();
  // console.log(API_HOST);
  const time = url.indexOf('?') > -1 ? `&time=${number}` : `?time=${number}`;
  if (url.indexOf('http://') == -1 && url.indexOf('https://') == -1) {
    if (
      url.indexOf('/api/v') === -1 &&
      url.indexOf('/api/supplier') === -1 &&
      url.indexOf('/api/contract') === -1
    ) {
      url = `/api/v1${url}${time}`;
    }
    // API_HOST在config/config.js的define中配置
    // url = API_HOST + url
  }
  console.log(url);
  let token = getToken();
  if (!token) {
    token = GetTokenFromUrl();
    storeToken(token);
  }

  const options = {
    expirys: isAntdPro(),
    ...option,
  };

  /**
   * Produce fingerprints based on url and parameters
   * Maybe url has the same parameters
   */
  const fingerprint = url + (options.body ? JSON.stringify(options.body) : '');
  const hashcode = hash
    .sha256()
    .update(fingerprint)
    .digest('hex');

  const defaultOptions = {
    credentials: 'include',
  };
  const newOptions = { ...defaultOptions, ...options };

  newOptions.headers = {
    ...newOptions.headers,
    'JWT-TOKEN': jwt ? jwt : `${token}`,
  };
  if (
    newOptions.method === 'POST' ||
    newOptions.method === 'PUT' ||
    newOptions.method === 'DELETE'
  ) {
    if (!(newOptions.body instanceof FormData)) {
      newOptions.headers = {
        Accept: 'application/json',
        'Content-Type': 'application/json;charset=utf-8',
        ...newOptions.headers,
      };
      newOptions.body = JSON.stringify(newOptions.body);
    } else {
      // newOptions.body is FormData
      newOptions.headers = {
        Accept: 'application/json',
        ...newOptions.headers,
      };
    }
  }
  const expirys = options.expirys && 60;
  // options.expirys !== false, return the cache,
  if (options.expirys !== false) {
    const cached = sessionStorage.getItem(hashcode);
    const whenCached = sessionStorage.getItem(`${hashcode}:timestamp`);
    if (cached !== null && whenCached !== null) {
      const age = (Date.now() - whenCached) / 1000;
      if (age < expirys) {
        const response = new Response(new Blob([cached]));
        return response.json();
      }
      sessionStorage.removeItem(hashcode);
      sessionStorage.removeItem(`${hashcode}:timestamp`);
    }
  }
  return fetch(url, newOptions)
    .then(checkStatus)
    .then(response => cachedSave(response, hashcode))
    .then(response => {
      // DELETE and 204 do not return data by default
      // using .json will report an error.
      if (response.status === 204) {
        return response.text();
      }
      // if (response.status === 600) {
      //   return response;
      // } else {
      return response.json();
      // }
    })
    .then(response => {
      let code = response.code;
      if (typeof response === 'string') {
        return response;
      } else if (code !== 200) {
        if (code === 401 || code === 601 || code === 602) {
          if (tokenFlag) return false;
          // 用户token出错，重定向
          tokenFlag = true;
          setTimeout(() => {
            tokenFlag = false;
          }, 3000);
          notification.error({
            message: '错误',
            description: 'token失效，请重新登录',
          });
          router.push(`/login?referrer=${encodeURIComponent(encodeURIComponent(location.href))}`);
        } else {
          if (flag) return false;
          flag = true;
          setTimeout(() => {
            flag = false;
          }, 3000);
          message.error(response.msg);
        }
        return false;
      } else {
        return response;
      }
    })
    .catch(e => {
      const status = e?.name;
      // environment should not be used
      if (status === 401 || status === 601 || status === 602 || status === 400) {
        if (tokenFlag) return false;
        // 用户token出错，重定向
        tokenFlag = true;
        setTimeout(() => {
          tokenFlag = false;
        }, 3000);
        // 用户token出错，重定向
        notification.error({
          message: '错误',
          description: 'token失效，请重新登录',
        });
        router.push(`/login?referrer=${encodeURIComponent(encodeURIComponent(location.href))}`);
        return;
      } else if (status == 'AbortError') {
        // 中止的ajax 不做额外处理
        return e;
      }
      // if (status <= 504 && status > 500 && status !== 600) {
      //   router.push('/exception/500');
      //   throw e;
      // }
      // if (status >= 404 && status < 422) {
      //   router.push('/exception/404');
      //   throw e;
      // }

      // if (status === 600) {
      //   throw e;
      // }

      notification.error({
        message: '错误',
        description: `网络连接异常，请检查网络后重试`,
        // description: `HTTP请求错误,错误码:${status};接口地址${url}`,
      });
      throw e;
    });
}