const md5 = require("./md5.js");
const util = require("./util.js");

/**
 * 网络请求对象
 */
const net = {
  commonParams: () => {
    let systemInfo = util.getStorageSync("systemInfo");
    if (!systemInfo) {
      systemInfo = wx.getSystemInfoSync();
      if (!systemInfo) {
        wx.setStorageSync("systemInfo", systemInfo);
      }
    }
    let deviceId = "weapp";
    let systemVersion = "weapp";
    if (systemInfo) {
      let { brand, model, system } = systemInfo;
      if (brand || model) {
        deviceId = brand + model;
      }
      if (system && "string" === typeof system) {
        systemVersion = system;
      }
    }
    let params = {
      language: "cn", //语言参数
      deviceType: "weapp", //weapp 接口调用来源参数
      deviceId: deviceId, //设备唯一标识码
      apiVersion: "1.0.0", //api版本号
      systemVersion: systemVersion, //操作系统及版本号
    };
    let loginUserInfo = util.getStorageSync("USERINFO");
    if (loginUserInfo) {
      let userToken = loginUserInfo.token;
      if (userToken) {
        params.token = userToken; //用户登录凭证token
      }
    }
    return params;
  },
  paramsSign: function (params, url) {
    /*参数签名*/
    let key = "d9ce9fe030776727e85442d033d1be84";
    if (url && url.indexOf("/common/") !== -1) {
      key = "b15681f74461af9642ab5356fba7962b";
    }
    let allKeys = [],
      paramsLower = {},
      sArr = [],
      res = "";
    for (let k in params) {
      let kLower = k;
      allKeys.push(kLower);
      paramsLower[kLower] = params[k];
    }
    allKeys.sort();
    allKeys.forEach((v, i, a) => {
      sArr.push(`${v}=${paramsLower[v]}`);
    });
    sArr.push(`key=${key}`);
    res = sArr.join("&");
    res = md5(res);
    return res.toLowerCase();
  },
  //isDealFail是否手动处理异常，true or false
  req: function (options, isDealFail) {
    //get或post请求
    const params = {
      ...options,
    };
    if (!params.url) {
      wx.showToast({
        title: "请设置请求url",
        icon: "none",
        duration: 2000,
      });
      return Promise.reject();
    }
    // 过滤空值
    for (const key in params.data) {
      if (util.isUndef(params.data[key])) {
        delete params.data[key];
      }
    }
    return new Promise((resolve, reject) => {
      params.data = Object.assign({}, net.commonParams(), params.data);
      params.data.signToken = net.paramsSign(params.data, params.url);
      wx.request({
        url: params.url,
        data: params.data || null,
        header: {
          "content-type": "application/x-www-form-urlencoded; charset=UTF-8",
        },
        method: params.method || "POST",
        dataType: params.dataType || "json",
        success: function (res) {
          const { code, msg, data } = res.data;
          if (0 === code) {
            //ok
            return resolve(data);
          } else if (3 === code) {
            //未登录
            wx.clearStorage();
            wx.navigateTo({
              url: "/pages/login/login",
            });
            return reject(res.data);
          } else {
            if (isDealFail !== true && msg) {
              wx.showToast({
                title: msg || "",
                icon: "none",
                duration: 2000,
              });
            }
            return reject(res.data);
          }
        },
        fail: function (e) {
          if (isDealFail !== true) {
            wx.showToast({
              title: (e && e.errMsg) || "",
              icon: "none",
              duration: 2000,
            });
          }
          reject(e);
        },
        complete: function (res) {},
      });
    });
  },
  uploadFile: function (params, isDealFail) {
    //get或post请求
    if (!params) {
      wx.showToast({
        title: "请设置请求参数",
        icon: "none",
        duration: 2000,
      });
      return new Promise((resolve, reject) => {
        reject();
      });
    }

    if (!params.url) {
      wx.showToast({
        title: "请设置请求url",
        icon: "none",
        duration: 2000,
      });
      return new Promise((resolve, reject) => {
        reject();
      });
    }

    if (!params.filePath || !params.filePath.length) {
      wx.showToast({
        title: "请设置文件资源的路径",
        icon: "none",
        duration: 2000,
      });
      return new Promise((resolve, reject) => {
        reject();
      });
    }

    let promise = new Promise((resolve, reject) => {
      params.data = Object.assign({}, net.commonParams(), params.data);
      params.data.signToken = net.paramsSign(params.data, params.url);
      wx.uploadFile({
        url: params.url,
        filePath: params.filePath,
        name: "files[]",
        formData: params.data,
        header: {
          "content-type": "multipart/form-data",
        },
        method: "POST",
        success: function (res) {
          let data = res.data;
          if (typeof data == "string" && data.constructor == String) {
            data = JSON.parse(data);
          }
          let { code, msg } = data;
          if (0 === parseInt(code)) {
            //ok
            resolve(data);
          } else if (3 === code) {
            //未登录
            //未登录
            wx.clearStorage();
            wx.navigateTo({
              url: "/pages/login/login",
            });
            return reject(res.data);
          } else {
            if (isDealFail) {
              reject(data);
            } else {
              wx.showToast({
                title: msg || "error",
                icon: "none",
                duration: 2000,
              });
            }
          }
        },
        fail: function (e) {
          if (isDealFail) {
            reject(e);
          } else {
            wx.showToast({
              title: (e && e.errMsg) || "",
              icon: "none",
              duration: 2000,
            });
          }
        },
        complete: function (res) {},
      });
    });
    return promise;
  },
};
module.exports = net;