<template>
  <div class="login-page">
    <!-- 背景装饰 -->
    <div class="bg-decoration">
      <div class="shape shape-1"></div>
      <div class="shape shape-2"></div>
      <div class="shape shape-3"></div>
    </div>
    
    <!-- 登录表单容器 -->
    <div class="login-container">
      <div class="login-card">
        <!-- 头部信息 -->
        <div class="login-header">
          <div class="logo">
            <el-icon size="48" color="#667eea"><Operation /></el-icon>
          </div>
          <h1 class="title">PT Tracker</h1>
          <p class="subtitle">私有种子分享社区</p>
        </div>
        
        <!-- 登录表单 -->
        <el-form
          ref="loginFormRef"
          :model="loginForm"
          :rules="loginRules"
          class="login-form"
          size="large"
        >
          <el-form-item prop="username">
            <el-input
              v-model="loginForm.username"
              placeholder="请输入用户名或邮箱"
              clearable
              :prefix-icon="User"
            />
          </el-form-item>
          
          <el-form-item prop="password">
            <el-input
              v-model="loginForm.password"
              type="password"
              placeholder="请输入密码"
              show-password
              :prefix-icon="Lock"
              @keyup.enter="handleLogin"
            />
          </el-form-item>
          
          <el-form-item>
            <div class="login-options">
              <el-checkbox v-model="rememberMe">记住登录</el-checkbox>
              <el-link type="primary" :underline="false">忘记密码？</el-link>
            </div>
          </el-form-item>
          
          <el-form-item>
            <el-button
              type="primary"
              :loading="loading"
              style="width: 100%"
              @click="handleLogin"
            >
              <span v-if="!loading">登录</span>
              <span v-else>登录中...</span>
            </el-button>
          </el-form-item>
        </el-form>
        
        <!-- 底部链接 -->
        <div class="login-footer">
          <span class="footer-text">还没有账号？</span>
          <el-link 
            type="primary" 
            :underline="false"
            @click="$router.push('/register')"
          >
            立即注册
          </el-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { ref, reactive } from 'vue'
import { useRouter } from 'vue-router'
import { ElMessage } from 'element-plus'
import { User, Lock, Operation } from '@element-plus/icons-vue'

export default {
  name: 'LoginView',
  components: {
    Operation
  },
  setup() {
    const router = useRouter()
    const loginFormRef = ref()
    const loading = ref(false)
    const rememberMe = ref(false)
    
    // 表单数据
    const loginForm = reactive({
      username: '',
      password: ''
    })
    
    // 验证规则
    const loginRules = {
      username: [
        { required: true, message: '请输入用户名或邮箱', trigger: 'blur' },
        { min: 3, message: '用户名至少3个字符', trigger: 'blur' }
      ],
      password: [
        { required: true, message: '请输入密码', trigger: 'blur' },
        { min: 6, message: '密码至少6个字符', trigger: 'blur' }
      ]
    }
    
    // 登录处理
    const handleLogin = async () => {
      try {
        // 表单验证
        const valid = await loginFormRef.value.validate()
        if (!valid) return
        
        loading.value = true
        
        // 模拟登录API请求
        await new Promise(resolve => setTimeout(resolve, 1000))
        
        // 简单的登录验证（实际项目中应该调用后端API）
        if (loginForm.username === 'admin' && loginForm.password === '123456') {
          // 登录成功
          localStorage.setItem('isLoggedIn', 'true')
          localStorage.setItem('username', loginForm.username)
          localStorage.setItem('loginTime', new Date().toISOString())
          
          if (rememberMe.value) {
            localStorage.setItem('rememberLogin', 'true')
          }
          
          ElMessage.success('登录成功！欢迎回来')
          router.push('/home')
        } else {
          ElMessage.error('用户名或密码错误，请重试')
        }
        
      } catch (error) {
        console.error('登录失败:', error)
        ElMessage.error('登录失败，请稍后重试')
      } finally {
        loading.value = false
      }
    }
    
    return {
      loginFormRef,
      loginForm,
      loginRules,
      loading,
      rememberMe,
      handleLogin,
      User,
      Lock
    }
  }
}
</script>

<style lang="scss" scoped>
.login-page {
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

// 背景装饰
.bg-decoration {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 1;
  
  .shape {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 6s ease-in-out infinite;
    
    &.shape-1 {
      width: 200px;
      height: 200px;
      top: 10%;
      left: 10%;
      animation-delay: 0s;
    }
    
    &.shape-2 {
      width: 150px;
      height: 150px;
      top: 60%;
      right: 10%;
      animation-delay: -2s;
    }
    
    &.shape-3 {
      width: 100px;
      height: 100px;
      bottom: 20%;
      left: 20%;
      animation-delay: -4s;
    }
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(180deg);
  }
}

// 登录容器
.login-container {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 420px;
}

.login-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 40px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  
  .login-header {
    text-align: center;
    margin-bottom: 32px;
    
    .logo {
      margin-bottom: 16px;
    }
    
    .title {
      font-size: 32px;
      font-weight: 700;
      color: #2c3e50;
      margin-bottom: 8px;
      letter-spacing: -0.5px;
    }
    
    .subtitle {
      font-size: 15px;
      color: #7f8c8d;
      margin: 0;
      font-weight: 400;
    }
  }
  
  .login-form {
    .el-form-item {
      margin-bottom: 24px;
      
      &:last-child {
        margin-bottom: 0;
      }
    }
    
    .login-options {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      
      .el-checkbox {
        :deep(.el-checkbox__label) {
          font-size: 14px;
          color: #606266;
        }
      }
      
      .el-link {
        font-size: 14px;
      }
    }
    
    .el-button {
      font-size: 16px;
      font-weight: 500;
      height: 48px;
      border-radius: 8px;
    }
  }
  
  .login-footer {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid #ebeef5;
    
    .footer-text {
      color: #909399;
      font-size: 14px;
      margin-right: 8px;
    }
    
    .el-link {
      font-size: 14px;
      font-weight: 500;
    }
  }
}

// 响应式设计
@media (max-width: 768px) {
  .login-page {
    padding: 16px;
  }
  
  .login-card {
    padding: 32px 24px;
    
    .login-header .title {
      font-size: 28px;
    }
  }
}
</style>