<template>
  <div class="register-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>
    
    <!-- 注册表单容器 -->
    <div class="register-container">
      <div class="register-card">
        <!-- 头部信息 -->
        <div class="register-header">
          <div class="logo">
            <el-icon size="48" color="#a8edea"><UserFilled /></el-icon>
          </div>
          <h1 class="title">加入 PT Tracker</h1>
          <p class="subtitle">开始你的资源分享之旅</p>
        </div>
        
        <!-- 注册表单 -->
        <el-form
          ref="registerFormRef"
          :model="registerForm"
          :rules="registerRules"
          class="register-form"
          size="large"
        >
          <el-form-item prop="username">
            <el-input
              v-model="registerForm.username"
              placeholder="请输入用户名"
              clearable
              :prefix-icon="User"
            />
          </el-form-item>
          
          <el-form-item prop="email">
            <el-input
              v-model="registerForm.email"
              placeholder="请输入邮箱地址"
              clearable
              :prefix-icon="Message"
            />
          </el-form-item>
          
          <el-form-item prop="password">
            <el-input
              v-model="registerForm.password"
              type="password"
              placeholder="请输入密码"
              show-password
              :prefix-icon="Lock"
            />
          </el-form-item>
          
          <el-form-item prop="confirmPassword">
            <el-input
              v-model="registerForm.confirmPassword"
              type="password"
              placeholder="请确认密码"
              show-password
              :prefix-icon="Lock"
            />
          </el-form-item>
          
          <el-form-item prop="agreement">
            <el-checkbox v-model="registerForm.agreement">
              我已阅读并同意
              <el-link type="primary" :underline="false">《用户协议》</el-link>
              和
              <el-link type="primary" :underline="false">《隐私政策》</el-link>
            </el-checkbox>
          </el-form-item>
          
          <el-form-item>
            <el-button
              type="primary"
              :loading="loading"
              style="width: 100%"
              @click="handleRegister"
            >
              <span v-if="!loading">注册</span>
              <span v-else>注册中...</span>
            </el-button>
          </el-form-item>
        </el-form>
        
        <!-- 底部链接 -->
        <div class="register-footer">
          <span class="footer-text">已有账号？</span>
          <el-link 
            type="primary" 
            :underline="false"
            @click="$router.push('/login')"
          >
            立即登录
          </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, Message, UserFilled } from '@element-plus/icons-vue'

export default {
  name: 'RegisterView',
  components: {
    UserFilled
  },
  setup() {
    const router = useRouter()
    const registerFormRef = ref()
    const loading = ref(false)
    
    // 表单数据
    const registerForm = reactive({
      username: '',
      email: '',
      password: '',
      confirmPassword: '',
      agreement: false
    })
    
    // 自定义验证规则
    const validateConfirmPassword = (rule, value, callback) => {
      if (value === '') {
        callback(new Error('请再次输入密码'))
      } else if (value !== registerForm.password) {
        callback(new Error('两次输入密码不一致'))
      } else {
        callback()
      }
    }
    
    const validateAgreement = (rule, value, callback) => {
      if (!value) {
        callback(new Error('请先同意用户协议和隐私政策'))
      } else {
        callback()
      }
    }
    
    // 验证规则
    const registerRules = {
      username: [
        { required: true, message: '请输入用户名', trigger: 'blur' },
        { min: 3, max: 20, message: '用户名长度在3到20个字符', trigger: 'blur' },
        { pattern: /^[a-zA-Z0-9_]+$/, message: '用户名只能包含字母、数字和下划线', trigger: 'blur' }
      ],
      email: [
        { required: true, message: '请输入邮箱地址', trigger: 'blur' },
        { type: 'email', message: '请输入正确的邮箱格式', trigger: 'blur' }
      ],
      password: [
        { required: true, message: '请输入密码', trigger: 'blur' },
        { min: 6, max: 20, message: '密码长度在6到20个字符', trigger: 'blur' },
        { pattern: /^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)[a-zA-Z\d@$!%*?&]/, message: '密码必须包含大小写字母和数字', trigger: 'blur' }
      ],
      confirmPassword: [
        { required: true, validator: validateConfirmPassword, trigger: 'blur' }
      ],
      agreement: [
        { required: true, validator: validateAgreement, trigger: 'change' }
      ]
    }
    
    // 注册处理
    const handleRegister = async () => {
      try {
        // 表单验证
        const valid = await registerFormRef.value.validate()
        if (!valid) return
        
        loading.value = true
        
        // 模拟注册API请求
        await new Promise(resolve => setTimeout(resolve, 1500))
        
        // 模拟注册成功
        ElMessage.success('注册成功！请登录您的账号')
        
        // 跳转到登录页
        router.push('/login')
        
      } catch (error) {
        console.error('注册失败:', error)
        ElMessage.error('注册失败，请稍后重试')
      } finally {
        loading.value = false
      }
    }
    
    return {
      registerFormRef,
      registerForm,
      registerRules,
      loading,
      handleRegister,
      User,
      Lock,
      Message
    }
  }
}
</script>

<style lang="scss" scoped>
.register-page {
  min-height: 100vh;
  background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

// 背景装饰（与登录页相同的动画效果）
.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, 0.15);
    animation: float 8s ease-in-out infinite;
    
    &.shape-1 {
      width: 180px;
      height: 180px;
      top: 15%;
      left: 15%;
      animation-delay: 0s;
    }
    
    &.shape-2 {
      width: 120px;
      height: 120px;
      top: 50%;
      right: 15%;
      animation-delay: -3s;
    }
    
    &.shape-3 {
      width: 90px;
      height: 90px;
      bottom: 25%;
      left: 25%;
      animation-delay: -6s;
    }
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(-15px) rotate(180deg);
  }
}

// 注册容器
.register-container {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 420px;
}

.register-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);
  
  .register-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;
    }
  }
  
  .register-form {
    .el-form-item {
      margin-bottom: 20px;
      
      &:last-child {
        margin-bottom: 0;
      }
    }
    
    .el-checkbox {
      :deep(.el-checkbox__label) {
        font-size: 14px;
        color: #606266;
        line-height: 1.5;
      }
    }
    
    .el-button {
      font-size: 16px;
      font-weight: 500;
      height: 48px;
      border-radius: 8px;
    }
  }
  
  .register-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) {
  .register-page {
    padding: 16px;
  }
  
  .register-card {
    padding: 32px 24px;
    
    .register-header .title {
      font-size: 28px;
    }
  }
}
</style>