import axios from "axios";
import config from "@/config";
import {getStore, setStore} from "./storage.js";
import {router} from "../router/index";
import {Message} from "view-design";
import Cookies from "js-cookie";
import {handleRefreshToken} from "../api/index"

// 统一请求路径前缀
export const commonUrl = (process.env.NODE_ENV === 'development' ? config.api_dev.common : config.api_prod.common);
export const managerUrl = (process.env.NODE_ENV === 'development' ? config.api_dev.manager : config.api_prod.manager) + config.baseUrlPrefix;

const service = axios.create({
  timeout: 8000,
  baseURL: managerUrl
})
var isRefreshToken = 0;
const refreshToken = getTokenDebounce()
service.interceptors.request.use(
  config => {
    if (config.method == 'get') {
      config.params = {
        _t: Date.parse(new Date()) / 1000,
        ...config.params
      }
    }
    return config;
  },
  err => {
    Message.error("请求超时");
    return Promise.reject(err);
  }
);

// http response 拦截器
service.interceptors.response.use(
  (response) => {
    const data = response.data;
    // 根据返回的code值来做不同的处理(和后端约定)
    if (!data.success && data.message) {
      Message.error(data.message);
    }
    switch (data.code) {
      case 400:
        if (data.message !== null) {
          Message.error(data.message);
        } else {
          Message.error("系统异常");
        }
        break;
      case 401:
        // 未登录 清除已登录状态
        Cookies.set("userInfo", "");
        setStore("accessToken", "");
        if (router.history.current.name != "login") {
          if (data.message !== null) {
            Message.error(data.message);
          } else {
            Message.error("未知错误，请重新登录");
          }
          router.push("/login");
        }
        return data;
        break;
      case 403:
        // 权限不足
        if (data.message !== null) {
          Message.error(data.message);
        } else {
          Message.error("权限不足");
        }
        break;
      case 500:
        // 系统异常
        if (data.message !== null) {
          Message.error(data.message);
        } else {
          Message.error("系统异常");
        }
        break;
      default:
        return data;
    }
  },
  async (error) => {
    // 返回状态码不为200时候的错误处理
    if (error.response) {
      if (error.response.status === 401) {
        // 这种情况一般调到登录页
      } else if (error.response.status === 403) {
        isRefreshToken++;
        if(isRefreshToken === 1) {
          const getTokenRes = await refreshToken();
          if (getTokenRes === 'success') { // 刷新token
            if (isRefreshToken === 1) {
              error.response.config.headers.accessToken = getStore('accessToken')
              return service(error.response.config)
            } else {
              router.go(0)
            }
          } else {
            Cookies.set("userInfo", "");
            router.push('/login')
          }
          isRefreshToken = 0
        }

      } else {
        // 其他错误处理
        Message.error(error.response.data.message)
      }
    }
    /* router.push("/login") */
    return Promise.resolve(error);
  }
)


// 防抖闭包来一波
function getTokenDebounce() {
  let lock = false
  let success = false
  return function () {
    if (!lock) {
      lock = true
      let oldRefreshToken = getStore("refreshToken");
      handleRefreshToken(oldRefreshToken).then(res => {
        if (res.success) {
          let {
            accessToken,
            refreshToken
          } = res.result;
          setStore("accessToken", accessToken);
          setStore("refreshToken", refreshToken);

          success = true
          lock = false
        } else {
          success = false
          lock = false
          router.push('/login')
        }
      }).catch((err) => {
        success = false
        lock = false
      })
    }
    return new Promise(resolve => {
      // 一直看lock,直到请求失败或者成功
      const timer = setInterval(() => {
        if (!lock) {
          clearInterval(timer)
          if (success) {
            resolve('success')
          } else {
            resolve('fail')
          }
        }
      }, 500) // 轮询时间间隔
    })
  }
}


export const getRequest = (url, params) => {
  let accessToken = getStore("accessToken");
  return service({
    method: "get",
    url: `${url}`,
    params: params,
    headers: {
      accessToken: accessToken
    }
  });
};

export const postRequest = (url, params, headers) => {
  let accessToken = getStore("accessToken");
  return service({
    method: "post",
    url: `${url}`,
    data: params,
    transformRequest: headers
      ? undefined
      : [
        function (data) {
          let ret = "";
          for (let it in data) {
            ret +=
              encodeURIComponent(it) +
              "=" +
              encodeURIComponent(data[it]) +
              "&";
          }
          ret = ret.substring(0, ret.length - 1);
          return ret;
        }
      ],
    headers: {
      "Content-Type": "application/x-www-form-urlencoded",
      accessToken: accessToken,
      ...headers
    }
  });
};

/** 不带form表单不带transformRequest */
export const postRequestWithNoForm = (url, params) => {
  let accessToken = getStore("accessToken");
  return service({
    method: "post",
    url: `${url}`,
    data: params,

    headers: {
      accessToken: accessToken
    }
  });
};

// export const postRequestWithHeaders = (url, params) => {
//   let accessToken = getStore("accessToken");
//   return axios({
//     method: "post",
//     url: `${url}`,
//     data: params,

//     headers: {
//       accessToken: accessToken,
//       "Content-Type": "application/x-www-form-urlencoded"
//     }
//   });
// };

export const putRequest = (url, params, headers) => {
  let accessToken = getStore("accessToken");
  return service({
    method: "put",
    url: `${url}`,
    data: params,
    transformRequest: headers
      ? undefined
      : [
        function (data) {
          let ret = "";
          for (let it in data) {
            ret +=
              encodeURIComponent(it) +
              "=" +
              encodeURIComponent(data[it]) +
              "&";
          }
          ret = ret.substring(0, ret.length - 1);
          return ret;
        }
      ],
    headers: {
      "Content-Type": "application/x-www-form-urlencoded",
      accessToken: accessToken,
      ...headers
    }
  });
};

export const putRequestWithNoForm = (url, params) => {
  let accessToken = getStore("accessToken");
  return service({
    method: "put",
    url: `${url}`,
    data: params,

    headers: {
      accessToken: accessToken
    }
  });
};

export const deleteRequest = (url, params) => {
  let accessToken = getStore("accessToken");
  return service({
    method: "delete",
    url: `${url}`,
    params: params,
    headers: {
      accessToken: accessToken
    }
  });
};

export const importRequest = (url, params) => {
  let accessToken = getStore("accessToken");
  return service({
    method: "post",
    url: `${url}`,
    data: params,
    headers: {
      accessToken: accessToken
    }
  });
};

export const uploadFileRequest = (url, params) => {
  let accessToken = getStore("accessToken");
  return service({
    method: "post",
    url: `${url}`,
    params: params,
    headers: {
      accessToken: accessToken
    }
  });
};

/**
 * 无需token验证的请求 避免旧token过期导致请求失败
 * @param {*} url
 * @param {*} params
 */
export const getRequestWithNoToken = (url, params) => {
  return service({
    method: "get",
    url: `${url}`,
    params: params
  });
};


/**
 * 无需token验证的请求 避免旧token过期导致请求失败
 * @param {*} url
 * @param {*} params
 */
export const postRequestWithNoToken = (url, params) => {
  return service({
    method: "post",
    url: `${url}`,
    params: params
  });
};