<template>
  <div class="login-container">
    <img src="../../assets/imgs/bg_bottom.png" class="bg_bottom" />
    <img src="../../assets/imgs/bg_left.png" class="bg_left" />
    <img src="../../assets/imgs/footer_logo.png" class="footer_logo" />
    <div class="formBox" ref="formBox">
      <el-form ref="loginForm" :model="loginForm" :style="{marginTop:marginTop+'px'}" :rules="loginRules"
        class="login-form" auto-complete="on" label-position="left">

        <div class="title-container">
          <h3 class="title">预约管理系统</h3>
        </div>
        <img src="../../assets/imgs/bg_box.png" width="100%" />
        <div class="box_middle">
          <el-form-item prop="username">
            <span class="svg-container">
              <svg-icon icon-class="user" />
            </span>
            <el-input ref="username" v-model="loginForm.username" placeholder="请输入登录名" name="username" type="text"
              tabindex="1" auto-complete="off" />
          </el-form-item>

          <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="请输入密码" name="password" tabindex="2" auto-complete="off" @keyup.enter.native="handleLogin" />
            <span class="show-pwd" @click="showPwd">
              <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
            </span>
          </el-form-item>

          <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;"
            @click.native.prevent="handleLogin">登录</el-button>
        </div>

        <img src="../../assets/imgs/bg_box_bottom.png" width="100%" />
      </el-form>
    </div>
    <div class="footer">
      2022 © 中共苏州独立支部旧址
    </div>
  </div>
</template>

<script>
  import {
    validUsername
  } from '@/utils/validate'

  export default {
    name: 'Login',
    data() {
      const validateUsername = (rule, value, callback) => {
        if (!validUsername(value)) {
          callback(new Error('请正确输入登录名'))
        } else {
          callback()
        }
      }
      const validatePassword = (rule, value, callback) => {
        if (value.length == 0) {
          callback(new Error('密码输入错误'))
        } else {
          callback()
        }
      }
      return {
        windowHeight: document.documentElement.clientHeight, //实时屏幕高度
        loginForm: {
          username: '',
          password: ''
        },
        loginRules: {
          username: [{
            required: true,
            trigger: 'blur',
            validator: validateUsername
          }],
          password: [{
            required: true,
            trigger: 'blur',
            validator: validatePassword
          }]
        },
        loading: false,
        passwordType: 'password',
        redirect: undefined,
        marginTop: 80,
        formHeight: 100
      }
    },
    watch: {
      $route: {
        handler: function(route) {
          this.redirect = route.query && route.query.redirect
        },
        immediate: true
      },
      windowHeight(val) {
        let that = this;
        console.log("实时屏幕高度：", val, that.windowHeight);
      }

    },
    created() {
      var that = this;
      this.$nextTick(() => {

        console.log(that.$refs.loginForm.offsetHeight)
      })
    },
    mounted() {
      var that = this;
      let height = this.$refs.formBox.offsetHeight; //100
      that.formHeight = height;
      that.marginTop = (that.windowHeight - height * 1.5) / 2;
      // <!--把window.onresize事件挂在到mounted函数上-->
      window.onresize = () => {
        return (() => {
          window.fullHeight = document.documentElement.clientHeight;
          that.windowHeight = window.fullHeight; // 高
        })()
      };
    },

    methods: {
      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 || '/'
              })
              this.loading = false
            }).catch(() => {
              this.loading = false
            })
          } else {
            console.log('error submit!!')
            return false
          }
        })
      }
    }
  }
</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:#ffffff;
  $light_gray:#55320f;
  $cursor: #55320f;

  @supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
    .login-container .el-input input {
      color: $cursor;
    }
  }

  .footer {
    position: fixed;
    bottom: 20px;
    text-align: center;
    width: 100%;
  }

  .footer_logo {
    position: fixed;
    bottom: 0;
    left: 50%;
    margin-left: -210px;
  }

  .box_middle {
    background: url("../../assets/imgs/bg_box_line.png") repeat-y;
    background-size: 100% 100%;
    padding: 20px 60px;
    margin-top: -10px;
  }


  /* 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 transparent inset !important;
          -webkit-text-fill-color: $light_gray !important;
          background-color: transparent;
          background-image: none;
          transition: background-color 50000s ease-in-out 0s;
        }
      }
    }

    .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:#f9efe5;
  $dark_gray:#55320f;
  $light_gray:#55320f;

  .bg_bottom {
    position: absolute;
    right: 0;
    bottom: 0;
  }

  .bg_left {
    position: absolute;
    left: 0;
    top: 0;
    height: 90%;
  }

  .login-container {
    min-height: 100%;
    width: 100%;
    background-color: $bg;
    overflow: hidden;
    position: relative;

    .login-form {
      position: relative;
      width: 520px;
      max-width: 100%;
      padding: 20px 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;
      }
    }

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