<!--登陆主页-->
<template>
  <div class="login-container">
    <div class="login-div">
      <div id="left-div" class="left-div">
        <div class="logo-div">
          <img>
        </div>
        <div class="title-div">
          <h3 class="title">智能闸井监测管理系统</h3>
        </div>
      </div>
      <div ref="element" class="right-div">
        <el-form id= "login-form" ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on" label-position="right">
          <h5 class="login-title">登录</h5>
          <el-form-item prop="username">
            <span class="svg-container">
              <svg-icon icon-class="user" />
            </span>
            <el-input v-model.trim="loginForm.username" name="username" type="text" auto-complete="on" placeholder="用户名" />
          </el-form-item>
          <el-form-item prop="password">
            <span class="svg-container">
              <svg-icon icon-class="password" />
            </span>
            <el-input
              :type="pwdType"
              v-model.trim="loginForm.password"
              name="password"
              auto-complete="on"
              placeholder="密码"
              @keyup.enter.native="handleLogin" />
            <span class="show-pwd" @click="showPwd">
              <svg-icon :icon-class="pwdType === 'password' ? 'eye' : 'eye-open'" />
            </span>
          </el-form-item>

          <kaptcha-comp v-if="showKaptcha" ref="kaptcha" @passKaptcha="passKaptcha"/>

          <el-form-item>
            <el-button :loading="loading" type="primary" style="width:100%;" @click.native.prevent="handleLogin">
              登录
            </el-button>
          </el-form-item>
        </el-form>
      </div>
      <div class="clear-div"/>
    </div>
  </div>
</template>

<script>
import { RSAencrypt } from '@/utils/security'
import kaptchaComp from '@/views/login/kaptcha/kaptcha'

export default {
  name: 'Login',
  components: {// 注册组件
    kaptchaComp: kaptchaComp
  },
  data() {
    const validateUsername = (rule, value, callback) => {
      if (value.length < 1) {
        callback(new Error('用户名不能为空'))
      } else {
        callback()
      }
    }
    const validatePass = (rule, value, callback) => {
      if (value.length < 1) {
        callback(new Error('密码不能为空'))
      } else {
        callback()
      }
    }
    const validateKaptcha = (rule, value, callback) => {
      console.log('验证验证码')
      if (this.showKaptcha) { // 如果开启了验证码判断，否则不判断
        if (value.length < 1) {
          callback(new Error('验证码不能为空'))
        } else {
          callback()
        }
      } else {
        callback()
      }
    }
    return {
      loginForm: {
        username: '',
        password: '',
        kaptcha: ''
      },
      loginRules: {
        username: [{ required: true, trigger: ['blur', 'change'], validator: validateUsername }],
        password: [{ required: true, trigger: ['blur', 'change'], validator: validatePass }],
        kaptcha: [{ required: false, trigger: ['blur', 'change'], validator: validateKaptcha }]
      },
      loading: false,
      pwdType: 'password',
      redirect: '/',
      showKaptcha: false
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  beforeCreate: function() { // 从后台获取系统配置，根据配置判断是否加载验证码控件
    this.loading = true
    this.$store.dispatch('GetConfig').then(() => {
      this.showKaptcha = this.$store.getters.kaptcha
      this.loading = false
      this.$message.success('连接服务器成功')
      if (this.showKaptcha) {
        var rightHeight = window.getComputedStyle(this.$refs.element).height
        rightHeight = parseFloat(rightHeight.substring(0, rightHeight.length - 2))
        document.getElementById('left-div').style.height = (rightHeight + 64.897) + 'px'
      }
    }).catch((e) => {
      this.$message.error('连接服务器失败')
      this.loading = false
    })
  },
  mounted: function() {
    // 自适应图片高度
    var rightHeight = window.getComputedStyle(this.$refs.element).height
    document.getElementById('left-div').style.height = rightHeight
  },
  methods: {
    showPwd() { // 明文显示密码
      if (this.pwdType === 'password') {
        this.pwdType = ''
      } else {
        this.pwdType = 'password'
      }
    },
    passKaptcha() { // 从子组件获取验证码的数据
      this.loginForm.kaptcha = this.$refs.kaptcha.kaptcha
      console.log(this.loginForm.kaptcha)
    },
    handleLogin() { // 点击登录按钮
      // if (!this.showKaptcha) { // 如果未开启验证码，将验证码字段从提交字段中移除
      //   delete this.loginForm['kaptcha']
      //   delete this.loginRules['kaptcha']
      // }
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          // 密码加密
          const loginForm = {
            sid: this.$store.getters.sid,
            username: this.loginForm.username,
            password: RSAencrypt(this.loginForm.password),
            kaptcha: this.loginForm.kaptcha
          }
          this.$store.dispatch('Login', loginForm).then(() => {
            this.loading = false
            this.$message.success('登录成功')
            this.$router.push({ path: '/' })
          }).catch((error) => {
            this.$message.error(error)
            this.loading = false
            if (this.showKaptcha) {
              this.$refs.kaptcha.refreshCode()
            }
          })
        } else {
          return false
        }
      })
    }
  }
}
</script>

<style rel="stylesheet/scss" lang="scss">
  $bg:#FFFFFF;
  $light_gray:#ffffff;
  $dark_gray:#889aa4;

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 40px;
    width: 85%;
    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 8px 5px 8px 8px;
      color: $dark_gray;
      height: 40px;
      &:-webkit-autofill {
        -webkit-box-shadow: 0 0 0px 1000px $light_gray inset !important;
        -webkit-text-fill-color: $dark_gray !important;
      }
    }
  }
  .el-form-item {
    border: 1px solid #c5c5c5;
    background: #ffffff;
    border-radius: 5px;
    color: #000000;
  }
  .el-button {
    line-height:1.2;
  }
}

</style>

<style rel="stylesheet/scss" lang="scss" scoped>
$bg:#FFFFFF;
$dark_gray:#889aa4;
$light_gray:#fff;
.login-container {
  position: relative;
  height: 100%;
  width: 100%;
  background: #000000 url("/static/images/login_images/bg.png") no-repeat;
  -webkit-background-size: 100% 100%;
  background-size: 100% 100%;
  background-color: $bg;
  .login-div{
    /*height:385px;*/
    width:800px;
    position:absolute;
    overflow:hidden;
    left:50%;
    top:50%;
    margin-left:-400px;
    margin-top:-220px;
    border:1px solid #889aa4;
    border-radius: 3px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, .12), 0 0 6px rgba(0, 0, 0, .04);
  }
  .left-div{
    width:60%;
    float:left;
    background: url("/static/images/login_images/left.jpg");
    background-color: #ffffffff;
  }
  .title-div{
    margin:20px 30px 30px 30px;
  }
  .title{
    color:$light_gray;
    font-size: 26px;
    font-weight: 400;
  }
  .right-div{
    width:40%;
    float:left;
    background-color:white
  }
  .clear-div{
    clear:both;
  }
  .login-form {
    max-width: 100%;
    padding: 15px 15px 5px 15px;
    margin: auto;
    overflow:hidden;
    border-radius: 3px;
    box-shadow: 0 5px 8px rgba(0, 0, 0, .12), 0 0 10px rgba(0, 0, 0, .04);
  }
  .tips {
    font-size: 14px;
    /*color: #fff;*/
    margin-bottom: 10px;
    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }
  .svg-container {
    padding: 0px 3px 0px 10px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }
  .login-title {
    font-size: 18px;
    font-weight: 400;
    color: #000;
    margin: 10px auto 30px auto;
    text-align: center;
  }
  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>