<template>
  <div class="login" :style="'background-image:url(' + Background + ');'">
    <div class="login-left-img" />
    <el-form
      ref="loginForm"
      :model="loginForm"
      :rules="loginRules"
      label-position="left"
      label-width="0px"
      class="login-form"
    >
      <h3 class="login-title" />
      <el-form-item prop="username">
        <el-input
          v-model="loginForm.username"
          type="text"
          auto-complete="off"
          placeholder="登录账号"
        >
          <i slot="prefix" class="iconfont icon-zhanghao login-icon" />
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input
          v-model="loginForm.password"
          type="password"
          auto-complete="off"
          placeholder="密码"
          @keyup.enter.native="handleLogin"
        >
          <i slot="prefix" class="iconfont icon-mima login-icon" />
        </el-input>
      </el-form-item>
      <el-form-item class="login-code" prop="code">
        <el-input
          v-model="loginForm.code"
          auto-complete="off"
          placeholder="验证码"
          @keyup.enter.native="handleLogin"
        >
          <i slot="prefix" class="iconfont icon-yanzhengma login-icon" />
        </el-input>
        <div class="code-img">
          <img :src="codeUrl" @click="getCode">
        </div>
      </el-form-item>
      <el-button
        :loading="loading"
        size="medium"
        @click.native.prevent="handleLogin"
      >
        <span v-if="!loading">登 录</span>
        <span v-else>登 录 中...</span>
      </el-button>
    </el-form>
    <!--  底部  -->
    <div v-if="$store.state.settings.showFooter" id="el-login-footer">
      <div class="login-footer-link">
        <a href="https://beian.miit.gov.cn/#/Integrated/index" target="_blank">帮助</a>
        <span> | </span>
        <a href="https://beian.miit.gov.cn/#/Integrated/index" target="_blank">隐私</a>
        <span> | </span>
        <a href="https://beian.miit.gov.cn/#/Integrated/index" target="_blank">条款</a>
      </div>
      <span v-html="$store.state.settings.footerTxt" />
      <!-- <span> ⋅ </span>
      <a href="https://beian.miit.gov.cn/#/Integrated/index" target="_blank">{{
        $store.state.settings.caseNumber
      }}</a> -->
    </div>
  </div>
</template>

<script>
import { encrypt } from '@/utils/rsaEncrypt'
import Config from '@/settings'
import { getCodeImg } from '@/api/login'
import Cookies from 'js-cookie'
import qs from 'qs'
import Background from '@/assets/images/login/dl-bg.png'
export default {
  name: 'Login',
  data() {
    return {
      Background: Background,
      codeUrl: '',
      cookiePass: '',
      loginForm: {
        username: '',
        password: '',
        rememberMe: false,
        code: '',
        uuid: ''
      },
      loginRules: {
        username: [
          { required: true, trigger: 'blur', message: '登录账号不能为空' }
        ],
        password: [
          { required: true, trigger: 'blur', message: '密码不能为空' }
        ],
        code: [
          { required: true, trigger: 'change', message: '验证码不能为空' }
        ]
      },
      loading: false,
      redirect: undefined
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        const data = route.query
        if (data && data.redirect) {
          this.redirect = data.redirect
          delete data.redirect
          if (JSON.stringify(data) !== '{}') {
            this.redirect =
              this.redirect + '&' + qs.stringify(data, { indices: false })
          }
        }
      },
      immediate: true
    }
  },
  created() {
    // 获取验证码
    this.getCode()
    // 获取用户名密码等Cookie
    this.getCookie()
    // token 过期提示
    this.point()
  },
  methods: {
    getCode() {
      getCodeImg().then((res) => {
        this.codeUrl = res.img
        this.loginForm.uuid = res.uuid
      })
    },
    getCookie() {
      const username = Cookies.get('username')
      let password = Cookies.get('password')
      const rememberMe = Cookies.get('rememberMe')
      // 保存cookie里面的加密后的密码
      this.cookiePass = password === undefined ? '' : password
      password = password === undefined ? this.loginForm.password : password
      this.loginForm = {
        username: username === undefined ? this.loginForm.username : username,
        password: password,
        rememberMe: rememberMe === undefined ? false : Boolean(rememberMe),
        code: ''
      }
    },
    handleLogin() {
      this.$refs.loginForm.validate((valid) => {
        const user = {
          username: this.loginForm.username,
          password: this.loginForm.password,
          rememberMe: this.loginForm.rememberMe,
          code: this.loginForm.code,
          uuid: this.loginForm.uuid
        }
        if (user.password !== this.cookiePass) {
          user.password = encrypt(user.password)
        }
        if (valid) {
          this.loading = true
          if (user.rememberMe) {
            Cookies.set('username', user.username, {
              expires: Config.passCookieExpires
            })
            Cookies.set('password', user.password, {
              expires: Config.passCookieExpires
            })
            Cookies.set('rememberMe', user.rememberMe, {
              expires: Config.passCookieExpires
            })
          } else {
            Cookies.remove('username')
            Cookies.remove('password')
            Cookies.remove('rememberMe')
          }
          this.$store
            .dispatch('Login', user)
            .then((res) => {
              this.loading = false
              if (res.code === 500) {
                this.$message({ message: res.message, type: 'warning', duration: 5000, offset: 8 })
                this.getCode()
              } else {
                this.$router.push({ path: this.redirect || '/' })
              }
            }).catch(res => {
              this.loading = false
              this.getCode()
            })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    },
    point() {
      const point = Cookies.get('point') !== undefined
      if (point) {
        this.$message({ message: '当前登录状态已过期，请重新登录！', type: 'warning', duration: 5000, offset: 8 })
        Cookies.remove('point')
      }
    }
  }
}
</script>

<style rel="stylesheet/scss" lang="scss">
.login {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100vh;
  position: relative;
  background-size: cover;
}

// 登录界面左边bg
.login-left-img{
  position: absolute;
  top: 19.16%;
  left: 10.625%;
  width: 48%;
  height: 67.8%;
  background: url('~@/assets/images/login/dl-bgt.png') no-repeat;
  background-size: contain;
}

// 登录框内标题
.login-title {
  width: 272px;
  height: 49px;
  margin: 0 auto 43px auto;
  background: url('~@/assets/images/login/dl-logo.png') no-repeat;
  background-size: contain;
}

// 登录表单
.login-form {
  width: 26%;
  padding: 5% 2% 5.8% 2%;
  position: absolute;
  left: calc(100vw - 44%);
  top: 50%;
  transform: translateY(-50%);
  background: #fff;
  box-shadow: 0px 10px 25px -4px rgba(14,44,119,0.1);
  border-radius: 10px;
  .el-form-item {
    width: 100% !important;
    height: 48px;
    margin-bottom: 24px;
    .el-form-item__content{
      height: 100%;
      .el-input{
        font-size: 14px;
        height: 100%;
        input{
          height: 100%;
          padding: 0 20px 0 45px;
          border-radius: 3px;
          border-color: #E6E8ED;
        }
      }
    }
  }
  .login-icon{
    margin-left: 10px;
    line-height: 48px;
    color: #545B65;
  }
  // 图形验证码
  .login-code {
    .el-form-item__content{
      display: flex;
      justify-content: space-between;
       .el-input{
         width: 60%;
       }
       .code-img{
        flex: 1;
        height: 43px;
        margin-left: 20px;
        display: inline-block;
        img {
          width: 100%;
          height: 100% !important;
          cursor: pointer;
        }
       }
    }
  }
  // 登录btn
  .el-button {
    width: 100% !important;
    height: 52px;
    margin-top: 36px;
    font-size: 20px;
    background: #0348F3;
    border-radius: 5px;
    color: #ffffff;
    border: none;
  }
}

// 底部-备案
#el-login-footer{
  position: absolute;
  left: 50%;
  bottom: 3%;
  transform: translateX(-50%);
  font-size: 12px;
  color: #A6ADB6;
  text-align: center;
  .login-footer-link{
    margin-bottom: 10px;
    span{
      display: inline-block;
      margin: 0 6px;
      color: #CBD5E6;
    }
  }
}
</style>
