/**
 * 用户相关服务
 */

const api = require('../config/api.js');


/**
 * 调用微信登录
 */
function loginByWeixin() {
  let code = null;
  return new Promise(function (resolve, reject) {
    return login().then((loginRes) => {
      code = loginRes.code;
      return getUserInfo();
    }).then((userInfoRes) => {
      //登录远程服务器
      wx.request({
        url: api.AuthLoginByWeixin,
        data: {
          code: code, userInfo: userInfoRes, storeId: wx.getStorageSync('storeId'),merchSn:wx.getStorageSync('merchSn')
        },
        method: 'POST',
        header: {
          'Content-Type': 'application/json'
        },
        success: function (res) {
          if (res.data.errno === 0) {
            //存储用户信息
            if (res.data.data.userInfo) {
              wx.setStorageSync('userInfo', res.data.data.userInfo);
            }
            if (res.data.data.token) {
              wx.setStorageSync('token', res.data.data.token);
            }
            wx.setStorageSync('userId', res.data.data.userId);
            resolve(res);
          } else {
            reject(res);
          }
        },
        fail: function (err) {
          reject(err)
          console.log("failed")
        }
      });
    });
  });
}

/**
 * 判断用户是否登录
 */
function checkLogin() {
  return new Promise(function (resolve, reject) {
    if (!wx.getStorageSync('userInfo') || !wx.getStorageSync('token')) {

      checkSession().then(() => {
        resolve(true);
      }).catch(() => {
        reject(false);
      });

    } else {
      reject(false);
    }
  });
}

/**
 * 调用微信登录
 */
function login() {
  return new Promise(function (resolve, reject) {
    wx.login({
      success: function (res) {
        if (res.code) {
          //登录远程服务器
          resolve(res);
        } else {
          reject(res);
        }
      },
      fail: function (err) {
        reject(err);
      }
    });
  });
}

function getUserInfo() {
  return new Promise(function (resolve, reject) {
    wx.getUserInfo({
      withCredentials: true,
      success: function (res) {
        resolve(res);
      },
      fail: function (err) {
        reject(err);
        wx.navigateTo({
          url: '/pages/auth/btnAuth/btnAuth',
        })
      }
    })
  });
}

/**
 * 检查微信会话是否过期
 */
function checkSession() {
  return new Promise(function (resolve, reject) {
    wx.checkSession({
      success: function () {
        resolve(true);
      },
      fail: function () {
        reject(false);
      }
    })
  });
}


module.exports = {
  loginByWeixin,
  checkLogin,
  checkSession,
  login,
  getUserInfo,
};