<template>
    <div class="login-container">

      <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" autocomplete="on" label-position="left">

        <div class="title-container">

          <h3 class="title">
            {{ $t('login.title') }}
          </h3>
          <lang-select class="set-language" />

        </div>
  
        <el-form-item prop="username">
          <span class="svg-container">
            <svg-icon icon-class="user" />
          </span>
          <el-input
            ref="username"
            v-model="loginForm.username"

            :placeholder="$t('login.username')"

            name="username"
            type="text"
            tabindex="1"

            autocomplete="on"

          />
        </el-form-item>

        <el-tooltip v-model="capsTooltip" content="Caps lock is On" placement="right" manual>
          <el-form-item prop="password">
            <span class="svg-container">
              <svg-icon icon-class="password" />
            </span>
            <el-input
              :key="passwordType"
              ref="password"
              v-model="loginForm.password"
              :type="passwordType"
              :placeholder="$t('login.password')"
              name="password"
              tabindex="2"
              autocomplete="on"
              @keyup.native="checkCapslock"
              @blur="capsTooltip = false"
              @keyup.enter.native="handleLogin"
            />
            <span class="show-pwd" @click="showPwd">
              <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
            </span>
          </el-form-item>
        </el-tooltip>
  
        <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;" @click.native.prevent="handleLogin">
          {{ $t('login.logIn') }}
        </el-button>

        <div style="position:relative">
          <div class="tips">
            <span>{{ $t('login.username') }} : admin</span>
            <span>{{ $t('login.password') }} : {{ $t('login.any') }}</span>
          </div>
          <div class="tips">
            <span style="margin-right:18px;">
              {{ $t('login.username') }} : editor
            </span>
            <span>{{ $t('login.password') }} : {{ $t('login.any') }}</span>
          </div>
  
          <el-button class="thirdparty-button" type="primary" @click="showDialog=true">
            {{ $t('login.thirdparty') }}
          </el-button>

        </div>

      </el-form>

  
      <el-dialog :title="$t('login.thirdparty')" :visible.sync="showDialog">
        {{ $t('login.thirdpartyTips') }}
        <br>
        <br>
        <br>
        <social-sign />
      </el-dialog>

    </div>
  </template>
  
  <script>

  import { validUsername } from '@/utils/validate'
  import LangSelect from '@/components/LangSelect'
  import SocialSign from './components/SocialSignin'

  
  export default {

    name: 'Login',
    components: { LangSelect, SocialSign },

    data() {
      const validateUsername = (rule, value, callback) => {
        if (!validUsername(value)) {

          callback(new Error('Please enter the correct user name'))

        } else {

          callback()

        }

      }

      const validatePassword = (rule, value, callback) => {
        if (value.length < 6) {

          callback(new Error('The password can not be less than 6 digits'))

        } else {

          callback()

        }

      }

      return {
        loginForm: {

          username: 'admin',
          password: '111111'

        },
        loginRules: {

          username: [{ required: true, trigger: 'blur', validator: validateUsername }],
          password: [{ required: true, trigger: 'blur', validator: validatePassword }]

        },

        passwordType: 'password',
        capsTooltip: false,

        loading: false,

        showDialog: false,
        redirect: undefined,
        otherQuery: {}
      }

    },
    watch: {
      $route: {
        handler: function(route) {

          const query = route.query
          if (query) {
            this.redirect = query.redirect
            this.otherQuery = this.getOtherQuery(query)
          }

        },
        immediate: true
      }
    },

    created() {
      // window.addEventListener('storage', this.afterQRScan)
    },
    mounted() {
      if (this.loginForm.username === '') {
        this.$refs.username.focus()
      } else if (this.loginForm.password === '') {
        this.$refs.password.focus()
      }
    },
    destroyed() {
      // window.removeEventListener('storage', this.afterQRScan)
    },

    methods: {

      checkCapslock(e) {
        const { key } = e
        this.capsTooltip = key && key.length === 1 && (key >= 'A' && key <= 'Z')
      },

      showPwd() {

        if (this.passwordType === 'password') {
          this.passwordType = ''

        } else {

          this.passwordType = 'password'

        }
        this.$nextTick(() => {

          this.$refs.password.focus()
        })

      },
      handleLogin() {
        this.$refs.loginForm.validate(valid => {
          if (valid) {

            this.loading = true
            this.$store.dispatch('user/login', this.loginForm)

              .then(() => {

                this.$router.push({ path: this.redirect || '/', query: this.otherQuery })
                this.loading = false
              })
              .catch(() => {
                this.loading = false

              })

          } else {

            console.log('error submit!!')
            return false

          }

        })
      },
      getOtherQuery(query) {
        return Object.keys(query).reduce((acc, cur) => {
          if (cur !== 'redirect') {
            acc[cur] = query[cur]
          }
          return acc
        }, {})

      }

      // afterQRScan() {
      //   if (e.key === 'x-admin-oauth-code') {
      //     const code = getQueryObject(e.newValue)
      //     const codeMap = {
      //       wechat: 'code',
      //       tencent: 'code'
      //     }
      //     const type = codeMap[this.auth_type]
      //     const codeName = code[type]
      //     if (codeName) {
      //       this.$store.dispatch('LoginByThirdparty', codeName).then(() => {
      //         this.$router.push({ path: this.redirect || '/' })
      //       })
      //     } else {
      //       alert('第三方登录失败')
      //     }
      //   }
      // }

    }

  }

  </script>
  
  <style lang="scss">
  /* 修复input 背景不协调 和光标变色 */
  /* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

  $bg:#283443;
  $light_gray:#fff;

  $cursor: #fff;
  
  @supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
    .login-container .el-input input {
      color: $cursor;
    }
  }
  
  /* reset element-ui css */
  .login-container {
    .el-input {
      display: inline-block;
      height: 47px;
      width: 85%;
  
      input {
        background: transparent;
        border: 0px;
        -webkit-appearance: none;
        border-radius: 0px;
        padding: 12px 5px 12px 15px;
        color: $light_gray;
        height: 47px;
        caret-color: $cursor;
  
        &:-webkit-autofill {
          box-shadow: 0 0 0px 1000px $bg inset !important;
          -webkit-text-fill-color: $cursor !important;
        }
      }
    }
  
    .el-form-item {
      border: 1px solid rgba(255, 255, 255, 0.1);
      background: rgba(0, 0, 0, 0.1);
      border-radius: 5px;
      color: #454545;
    }
  }
  </style>
  
  <style lang="scss" scoped>

  $bg:#2d3a4b;
  $dark_gray:#889aa4;
  $light_gray:#eee;

  
  .login-container {
    min-height: 100%;
    width: 100%;
    background-color: $bg;
    overflow: hidden;
  
    .login-form {
      position: relative;
      width: 520px;
      max-width: 100%;
      padding: 160px 35px 0;
      margin: 0 auto;
      overflow: hidden;
    }
  
    .tips {
      font-size: 14px;
      color: #fff;
      margin-bottom: 10px;
  
      span {
        &:first-of-type {
          margin-right: 16px;
        }
      }
    }
  
    .svg-container {
      padding: 6px 5px 6px 15px;
      color: $dark_gray;
      vertical-align: middle;
      width: 30px;
      display: inline-block;
    }
  
    .title-container {
      position: relative;
  
      .title {
        font-size: 26px;
        color: $light_gray;
        margin: 0px auto 40px auto;
        text-align: center;
        font-weight: bold;
      }

  
      .set-language {
        color: #fff;
        position: absolute;
        top: 3px;
        font-size: 18px;
        right: 0px;
        cursor: pointer;
      }

    }
  
    .show-pwd {
      position: absolute;
      right: 10px;
      top: 7px;
      font-size: 16px;
      color: $dark_gray;
      cursor: pointer;
      user-select: none;
    }

  
    .thirdparty-button {
      position: absolute;
      right: 0;
      bottom: 6px;
    }
  
    @media only screen and (max-width: 470px) {
      .thirdparty-button {
        display: none;
      }
    }

  }
  </style>