<template>
  <div class="login">
    <div class="content">
      <div class="left">
        <img class="logo" src="../assets/images/logo1.png" />
        <img class="img" src="../assets/images/login/img.png" />
      </div>
      <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form">
        <h3 class="title"><img src="../assets/images/title_icon.png"/>欢迎登录系统</h3>
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            type="text"
            auto-complete="off"
            placeholder="请输入登录账号"
          >
            <img class="img" slot="prefix" src="../assets/images/user.png"/>
          </el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            type="password"
            auto-complete="off"
            placeholder="请输入账号密码"
            @keyup.enter.native="handleLogin"
          >
            <img class="img" slot="prefix" src="../assets/images/password.png"/>
          </el-input>
        </el-form-item>
        <el-form-item prop="code" v-if="captchaEnabled">
          <el-input
            v-model="loginForm.code"
            auto-complete="off"
            placeholder="请输入验证码"
            style="width: 56%;float: left;"
            @keyup.enter.native="handleLogin"
          >
            <img class="img" slot="prefix" src="../assets/images/validCode.png"/>
          </el-input>
          <div class="login-code">
            <img :src="codeUrl" @click="getCode" class="login-code-img"/>
          </div>
        </el-form-item>
        <el-checkbox v-model="loginForm.rememberMe" style="margin:0px 0px 25px 48px;">记住密码</el-checkbox>
        <el-form-item style="width:100%;">
          <el-button
            :loading="loading"
            size="medium"
            type="primary"
            style="width:100%;height: 48px;border-radius: 4px;font-size: 16px;"
            @click.native.prevent="handleLogin"
          >
            <span v-if="!loading">登 录</span>
            <span v-else>登 录 中...</span>
          </el-button>
          <div style="float: right;" v-if="register">
            <router-link class="link-type" :to="'/register'">立即注册</router-link>
          </div>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
import { getCodeImg } from "@/api/login";
import Cookies from "js-cookie";
import { encrypt, decrypt } from '@/utils/jsencrypt'

export default {
  name: "Login",
  data() {
    return {
      codeUrl: "",
      loginForm: {
        username: "admin",
        password: "admin123",
        rememberMe: false,
        code: "",
        uuid: ""
      },
      loginRules: {
        username: [
          { required: true, trigger: "blur", message: "请输入您的账号" }
        ],
        password: [
          { required: true, trigger: "blur", message: "请输入您的密码" }
        ],
        code: [{ required: true, trigger: "change", message: "请输入验证码" }]
      },
      loading: false,
      // 验证码开关
      captchaEnabled: true,
      // 注册开关
      register: false,
      redirect: undefined
    };
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect;
      },
      immediate: true
    }
  },
  created() {
    this.getCode();
    this.getCookie();
  },
  methods: {
    getCode() {
      getCodeImg().then(res => {
        this.captchaEnabled = res.captchaEnabled === undefined ? true : res.captchaEnabled;
        if (this.captchaEnabled) {
          this.codeUrl = "data:image/gif;base64," + res.img;
          this.loginForm.uuid = res.uuid;
        }
      });
    },
    getCookie() {
      const username = Cookies.get("username");
      const password = Cookies.get("password");
      const rememberMe = Cookies.get('rememberMe')
      this.loginForm = {
        username: username === undefined ? this.loginForm.username : username,
        password: password === undefined ? this.loginForm.password : decrypt(password),
        rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
      };
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true;
          if (this.loginForm.rememberMe) {
            Cookies.set("username", this.loginForm.username, { expires: 30 });
            Cookies.set("password", encrypt(this.loginForm.password), { expires: 30 });
            Cookies.set('rememberMe', this.loginForm.rememberMe, { expires: 30 });
          } else {
            Cookies.remove("username");
            Cookies.remove("password");
            Cookies.remove('rememberMe');
          }
          this.$store.dispatch("Login", this.loginForm).then(() => {
            this.$router.push({ path: this.redirect || "/" }).catch(()=>{});
          }).catch(() => {
            this.loading = false;
            if (this.captchaEnabled) {
              this.getCode();
            }
          });
        }
      });
    }
  }
};
</script>

<style rel="stylesheet/scss" lang="scss">
.login {
  align-items: center;
  height: 100%;
  background-image: url("../assets/images/login_bg.png");
  background-size: cover;
  overflow-y: hidden;
  display: flex;
  justify-content: center;
  .content{
    width: 1320px;
    margin: 0 auto;
    /*padding-top: 180px;*/
  }
  .left{
    float: left;
    width: 730px;
    margin-right: 170px;
  }
  .logo{
    width: 253px;
    height: 55px;
    margin-bottom: 53px;
    margin-left: 127px;
  }
  .img{
    width: 662px;
    height: 566px;
  }
}
.title {
  padding: 46px 0 32px 48px;
  border-bottom: 1px solid #F0F0F0;
  font-size: 22px;
  color: #232323;
  margin: 0 0 32px 0;
  img{
    width: 17px;
    height: 17px;
    margin-bottom: 3px;
  }
}

.login-form {
  border-radius: 6px;
  background: #ffffff;
  width: 420px;
  float: right;
  margin-top: 70px;
  /*padding: 25px 25px 5px 25px;*/
  .el-form-item{
    padding: 0 48px;
    margin-bottom:24px;
  }
  .el-input {
    width: 324px;
    height: 48px;
    background: #F2F4F9;
    input {
      height: 48px;
      background: #F2F4F9;
      font-size: 14px;
    }
    .el-input__inner{
      padding-left: 73px;
      border: 0;
    }
  }
  .el-input__prefix{
    border-right: 1px solid #D8D8D8;
    height: 24px;
    margin: 12px 0;
  }
  .img {
    height: 24px;
    width: 24px;
    margin: 0 14px 0 12px;
  }
}
.login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}
.login-code {
  width: 33%;
  height: 38px;
  float: left;
  margin-left: 16px;
  img {
    cursor: pointer;
    vertical-align: middle;
  }
}
.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}
.login-code-img {
  height: 48px;
}
</style>
