<template>
  <div class="login">
    <div class="login-container">
      <div class="login-header">
        <h1 class="main-title">
          <img src="../assets/logo/logo.png" alt="logo" class="logo"/>
          <span>智能投标系统</span>
        </h1>
        <h2 class="sub-title">欢迎登录 welcome to login in</h2>
      </div>
      <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form">
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            type="text"
            auto-complete="off"
            placeholder="请输入用户名"
          >
            <svg-icon slot="prefix" icon-class="user" class="el-input__icon input-icon" />
          </el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            type="password"
            auto-complete="off"
            placeholder="请输入登录密码"
            @keyup.enter.native="handleLogin"
          >
            <svg-icon slot="prefix" icon-class="password" class="el-input__icon input-icon" />
          </el-input>
        </el-form-item>
        <el-form-item prop="code" v-if="captchaEnabled">
          <div class="code-wrapper">
            <el-input
              v-model="loginForm.code"
              auto-complete="off"
              placeholder="验证码"
              @keyup.enter.native="handleLogin"
            >
              <svg-icon slot="prefix" icon-class="validCode" class="el-input__icon input-icon" />
            </el-input>
            <div class="login-code">
              <img :src="codeUrl" @click="getCode" class="login-code-img"/>
            </div>
          </div>
        </el-form-item>
        <div class="form-options">
          <el-checkbox v-model="loginForm.rememberMe">记住密码</el-checkbox>
          <a href="#" class="forgot-password">忘记密码？</a>
        </div>
        <el-form-item style="width:100%;">
          <el-button
            :loading="loading"
            size="medium"
            type="primary"
            style="width:100%;"
            @click.native.prevent="handleLogin"
          >
            <span v-if="!loading">登录</span>
            <span v-else>登 录 中...</span>
          </el-button>
        </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'
import { getSystemConfigApi } from '@/utils/systemConfig'

export default {
  name: "Login",
  data() {
    return {
      title: process.env.VUE_APP_TITLE,
      codeUrl: "",
      loginForm: {
        username: "",
        password: "",
        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: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  created() {
    this.getSystemConfig()
    this.getCode()
    this.getCookie()
  },
  methods: {
   async getSystemConfig(){
      await getSystemConfigApi();
    },
    async getCode() {
      await getCodeImg().then(res => {
        this.captchaEnabled = res.captchaEnabled === undefined ? true : res.captchaEnabled
        if (this.captchaEnabled) {
          this.codeUrl = "data:image/gif;base64," + res.img
          this.loginForm.uuid = res.uuid
        }
      })
    },
    getCookie() {
      const username = Cookies.get("username")
      const password = Cookies.get("password")
      const rememberMe = Cookies.get('rememberMe')
      this.loginForm = {
        username: username === undefined ? this.loginForm.username : username,
        password: password === undefined ? this.loginForm.password : decrypt(password),
        rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
      }
    },
    handleLogin() {
      this.$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 {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background: #fff;
  background-image: url("../assets/images/login-background.jpg");
  background-repeat: no-repeat;
  background-position: center center;
  // background-size: contain;
  position: relative;
  
  &::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
  }
}

.login-container {
  width: 100%;
  max-width: 480px;
  padding: 0 20px;
  z-index: 1;
}

.login-header {
  text-align: center;
  margin-bottom: 40px;
  
  .main-title {
    font-size: 32px;
    font-weight: 700;
    color: #060F2E;
    margin-bottom: 12px;
    letter-spacing: 1px;
  }
  
  .sub-title {
    font-size: 18px;
    color: #666;
    font-weight: 500;
    margin: 0;
  }
}

.login-form {
  border-radius: 16px;
  background: #ffffff;
  width: 100%;
  padding: 40px 35px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(0, 0, 0, 0.05);
  
  .el-input {
    height: 48px;
    margin: 8px 0;
    position: relative;
    
    .el-input__inner {
      height: 48px;
      border-radius: 8px;
      border: 1px solid #e1e5e9;
      padding-left: 45px;
      font-size: 15px;
      transition: all 0.3s ease;
      background: #f9fafb;
      
      &:focus {
        border-color: #1E6BFF;
        box-shadow: 0 0 0 3px rgba(30, 107, 255, 0.1);
        background: #ffffff;
      }
      
      &:hover {
        border-color: #c0c4cc;
        background: #ffffff;
      }
    }
    
    .el-input__prefix {
      position: absolute;
      left: 15px;
      top: 50%;
      transform: translateY(-50%);
      z-index: 1;
    }
  }
  
  .input-icon {
    height: 18px;
    width: 18px;
    margin-left: 0;
    color: #999;
    transition: color 0.3s ease;
    position: absolute;
    top: 50%;
    left: 12px;
    transform: translateY(-50%);
  }
  
  .el-form-item {
    margin-bottom: 24px;
  }
  
  .el-checkbox {
    .el-checkbox__label {
      color: #666;
      font-size: 14px;
    }
    
    .el-checkbox__input.is-checked .el-checkbox__inner {
      background-color: #1E6BFF;
      border-color: #1E6BFF;
    }
  }
  
  .el-button {
    height: 48px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    background: linear-gradient(135deg, #0A57E7 0%, #1E6BFF 100%);
    border: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    will-change: transform;
    
    &:hover {
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(30, 107, 255, 0.35);
    }
    
    &:active {
      transform: translateY(0);
      box-shadow: 0 2px 6px rgba(30, 107, 255, 0.25);
    }
  }
}

.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
  
  .forgot-password {
    color: #1E6BFF;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
    
    &:hover {
      color: #0A57E7;
      text-decoration: underline;
    }
  }
}

.code-wrapper {
  display: flex;
  gap: 12px;
  align-items: center;
  
  .el-input {
    flex: 1;
  }
}

.login-code {
  width: 120px;
  height: 48px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #e1e5e9;
  cursor: pointer;
  transition: all 0.3s ease;
  flex-shrink: 0;
  
  &:hover {
    border-color: #1E6BFF;
    transform: scale(1.02);
  }
  
  img {
    cursor: pointer;
    vertical-align: middle;
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
}

.login-code-img {
  height: 48px;
}

// 响应式优化
@media (max-width: 768px) {
  .login {
    padding: 20px;
  }
  
  .login-container {
    padding: 0;
  }
  
  .login-form {
    padding: 30px 25px;
  }
  
  .login-header {
    .main-title {
      font-size: 28px;
    }
    
    .sub-title {
      font-size: 16px;
    }
  }
}

@media (max-width: 480px) {
  .login-form {
    padding: 25px 20px;
  }
  
  .login-header {
    .main-title {
      font-size: 24px;
    }
    
    .sub-title {
      font-size: 15px;
    }
  }
}

.logo{
  width: 56px;
  height: 65px;
}
</style>