<template>
  <div class="activity-registration-page">
    <!-- 面包屑导航 -->
    <div class="breadcrumb-container">
      <div class="container">
        <nav class="breadcrumb">
          <router-link to="/" class="breadcrumb-item">首页</router-link>
          <span class="breadcrumb-separator">></span>
          <router-link to="/activities" class="breadcrumb-item">活动</router-link>
          <span class="breadcrumb-separator">></span>
          <span class="breadcrumb-current">全国青少年人工智能创新实践活动</span>
        </nav>
      </div>
    </div>

    <!-- 活动横幅区域 -->
    <div class="hero-banner">
      <div class="banner-container">
        <div class="banner-content">
          <div class="banner-text">
            <h1 class="main-title">"与AI共创未来"</h1>
            <h2 class="sub-title">2025年全国青少年人工智能创新实践活动</h2>
            <div class="activity-description">
              <p>【活动简介】中国科协青少年科技中心、中国青少年科技辅导员协会主办，上海人工智能实验室协办，上海科技馆</p>
              <p>【支持单位】中国科协青少年科技中心承办的活动</p>
              <p>【协办单位】全国青少年科技创新大赛组委会办公室，上海科技馆青少年科学创新中心</p>
            </div>
          </div>
          <div class="banner-illustration">
            <div class="illustration-placeholder">
              <!-- 3D插画占位 -->
              <div class="ai-characters">
                <div class="character-1"></div>
                <div class="character-2"></div>
                <div class="tech-elements"></div>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>

    <!-- 报名表单区域 -->
    <div class="registration-form-container">
      <div class="container">
        <div class="form-section">
          <div class="form-header">
            <h3 class="form-title">📋 填写信息</h3>
          </div>
          
          <form class="registration-form" @submit.prevent="handleSubmit">
            <!-- 姓名 -->
            <div class="form-group">
              <label class="form-label required">*姓名：</label>
              <input 
                type="text" 
                v-model="formData.name" 
                class="form-input" 
                placeholder="请输入姓名"
                required
              />
            </div>

            <!-- 邮箱 -->
            <div class="form-group">
              <label class="form-label required">*邮箱：</label>
              <input 
                type="email" 
                v-model="formData.email" 
                class="form-input" 
                placeholder="请输入邮箱"
                required
              />
            </div>

            <!-- 手机 -->
            <div class="form-group">
              <label class="form-label required">*手机：</label>
              <input
                type="tel"
                v-model="formData.phone"
                class="form-input"
                placeholder="请输入手机号"
                required
              />
            </div>

            <!-- 手机号（验证码） -->
            <div class="form-group">
              <label class="form-label required">*手机号：</label>
              <div class="input-group">
                <input
                  type="tel"
                  v-model="formData.phone"
                  class="form-input"
                  placeholder="请输入手机号"
                  required
                />
                <button
                  type="button"
                  class="verify-btn"
                  @click="sendVerificationCode"
                  :disabled="countdown > 0"
                >
                  {{ countdown > 0 ? `${countdown}s后重试` : '获取验证码' }}
                </button>
              </div>
            </div>

            <!-- 验证码 -->
            <div class="form-group">
              <label class="form-label required">*验证码：</label>
              <input 
                type="text" 
                v-model="formData.verificationCode" 
                class="form-input" 
                placeholder="请输入验证码"
                required
              />
            </div>

            <!-- 班级 -->
            <div class="form-group">
              <label class="form-label">班级：</label>
              <input 
                type="text" 
                v-model="formData.className" 
                class="form-input" 
                placeholder="请输入班级"
              />
            </div>

            <!-- 选择参与组别 -->
            <div class="form-group">
              <label class="form-label required">*选择参与组别：</label>
              <select v-model="formData.group" class="form-select" required>
                <option value="">请选择组别</option>
                <option value="ai-art">AI艺术创作营</option>
                <option value="ai-interaction">AI交互设计营</option>
                <option value="ai-practice">人工智能实践营</option>
                <option value="ai-algorithm">AI算法挑战营</option>
                <option value="ai-certificate">AI创新数字素养证书</option>
              </select>
            </div>

            <!-- 附件上传 -->
            <div class="form-group">
              <label class="form-label">附件：</label>
              <div class="file-upload-area">
                <input 
                  type="file" 
                  ref="fileInput" 
                  @change="handleFileUpload" 
                  multiple 
                  class="file-input"
                  accept=".pdf,.doc,.docx,.jpg,.jpeg,.png"
                />
                <div class="upload-placeholder" @click="triggerFileUpload">
                  <div class="upload-icon">📎</div>
                  <p class="upload-text">点击上传文件或拖拽文件到此处</p>
                  <p class="upload-hint">支持 PDF、Word、图片格式</p>
                </div>
                <div v-if="uploadedFiles.length > 0" class="uploaded-files">
                  <div v-for="(file, index) in uploadedFiles" :key="index" class="file-item">
                    <span class="file-name">{{ file.name }}</span>
                    <button type="button" @click="removeFile(index)" class="remove-btn">×</button>
                  </div>
                </div>
              </div>
            </div>

            <!-- 提交按钮 -->
            <div class="form-actions">
              <button type="submit" class="submit-btn" :disabled="isSubmitting">
                {{ isSubmitting ? '提交中...' : '提交报名信息' }}
              </button>
            </div>
          </form>
        </div>
      </div>
    </div>


  </div>
</template>

<script setup lang="ts">
import { ref, reactive } from 'vue'
import { useRouter } from 'vue-router'

const router = useRouter()

// 表单数据
const formData = reactive({
  name: '',
  email: '',
  phone: '',
  verificationCode: '',
  className: '',
  group: 'ai-art' // 默认选择AI艺术创作营
})

// 文件上传
const fileInput = ref<HTMLInputElement>()
const uploadedFiles = ref<File[]>([])

// 验证码倒计时
const countdown = ref(0)
const isSubmitting = ref(false)

// 发送验证码
const sendVerificationCode = async () => {
  if (!formData.phone) {
    alert('请先输入手机号')
    return
  }
  
  // 模拟发送验证码
  countdown.value = 60
  const timer = setInterval(() => {
    countdown.value--
    if (countdown.value <= 0) {
      clearInterval(timer)
    }
  }, 1000)
  
  alert('验证码已发送到您的手机')
}

// 触发文件上传
const triggerFileUpload = () => {
  fileInput.value?.click()
}

// 处理文件上传
const handleFileUpload = (event: Event) => {
  const target = event.target as HTMLInputElement
  if (target.files) {
    const newFiles = Array.from(target.files)
    uploadedFiles.value.push(...newFiles)
  }
}

// 移除文件
const removeFile = (index: number) => {
  uploadedFiles.value.splice(index, 1)
}

// 提交表单
const handleSubmit = async () => {
  isSubmitting.value = true
  
  try {
    // 模拟提交
    await new Promise(resolve => setTimeout(resolve, 2000))
    
    alert('报名成功！我们会尽快与您联系。')
    router.push('/activity/1') // 返回活动详情页
  } catch (error) {
    alert('报名失败，请稍后重试')
  } finally {
    isSubmitting.value = false
  }
}
</script>

<style scoped>
.activity-registration-page {
  min-height: 100vh;
  background-color: #f5f5f5;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 面包屑导航 */
.breadcrumb-container {
  background: white;
  padding: 10px 0;
  border-bottom: 1px solid #e0e0e0;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.breadcrumb-item {
  color: #1890ff;
  text-decoration: none;
}

.breadcrumb-separator {
  color: #999;
}

.breadcrumb-current {
  color: #333;
}

/* 活动横幅区域 */
.hero-banner {
  background: linear-gradient(135deg, #1890ff 0%, #40a9ff 100%);
  color: white;
  padding: 40px 0;
  position: relative;
  overflow: hidden;
}

.banner-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.banner-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 200px;
}

.banner-text {
  flex: 1;
  max-width: 600px;
}

.main-title {
  font-size: 36px;
  font-weight: bold;
  margin-bottom: 10px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.sub-title {
  font-size: 20px;
  margin-bottom: 20px;
  opacity: 0.9;
}

.activity-description {
  font-size: 14px;
  line-height: 1.6;
  opacity: 0.8;
}

.activity-description p {
  margin-bottom: 5px;
}

.banner-illustration {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.illustration-placeholder {
  width: 300px;
  height: 200px;
  position: relative;
}

.ai-characters {
  width: 100%;
  height: 100%;
  position: relative;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 300 200"><defs><linearGradient id="grad1" x1="0%" y1="0%" x2="100%" y2="100%"><stop offset="0%" style="stop-color:rgba(255,255,255,0.2)"/><stop offset="100%" style="stop-color:rgba(255,255,255,0.1)"/></linearGradient></defs><circle cx="80" cy="80" r="30" fill="rgba(255,255,255,0.3)"/><circle cx="220" cy="120" r="25" fill="rgba(255,255,255,0.2)"/><rect x="120" y="60" width="60" height="80" rx="10" fill="url(%23grad1)"/></svg>') center/contain no-repeat;
}

/* 报名表单区域 */
.registration-form-container {
  padding: 40px 0;
  background: #f5f5f5;
}

.form-section {
  max-width: 800px;
  margin: 0 auto;
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  overflow: hidden;
}

.form-header {
  background: #f8f9fa;
  padding: 20px 30px;
  border-bottom: 1px solid #e9ecef;
}

.form-title {
  font-size: 18px;
  font-weight: 600;
  color: #333;
  margin: 0;
}

.registration-form {
  padding: 30px;
}

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-size: 14px;
  color: #333;
  margin-bottom: 8px;
  font-weight: 500;
}

.form-label.required {
  color: #333;
}

.form-label.required::before {
  content: '*';
  color: #ff4d4f;
  margin-right: 4px;
}

.form-input {
  width: 100%;
  height: 40px;
  padding: 0 12px;
  border: 1px solid #d9d9d9;
  border-radius: 4px;
  font-size: 14px;
  transition: border-color 0.3s;
  box-sizing: border-box;
}

.form-input:focus {
  border-color: #1890ff;
  outline: none;
  box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
}

.input-group {
  display: flex;
  gap: 10px;
}

.input-group .form-input {
  flex: 1;
}

.verify-btn {
  background: #1890ff;
  color: white;
  border: none;
  padding: 0 16px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  white-space: nowrap;
  transition: background-color 0.3s;
}

.verify-btn:hover:not(:disabled) {
  background: #40a9ff;
}

.verify-btn:disabled {
  background: #d9d9d9;
  cursor: not-allowed;
}

.form-select {
  width: 100%;
  height: 40px;
  padding: 0 12px;
  border: 1px solid #d9d9d9;
  border-radius: 4px;
  font-size: 14px;
  background: white;
  cursor: pointer;
  box-sizing: border-box;
}

.form-select:focus {
  border-color: #1890ff;
  outline: none;
  box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
}

/* 文件上传区域 */
.file-upload-area {
  border: 2px dashed #d9d9d9;
  border-radius: 4px;
  padding: 20px;
  text-align: center;
  transition: border-color 0.3s;
  cursor: pointer;
}

.file-upload-area:hover {
  border-color: #1890ff;
}

.file-input {
  display: none;
}

.upload-placeholder {
  color: #666;
}

.upload-icon {
  font-size: 24px;
  margin-bottom: 10px;
}

.upload-text {
  font-size: 14px;
  margin-bottom: 5px;
}

.upload-hint {
  font-size: 12px;
  color: #999;
}

.uploaded-files {
  margin-top: 15px;
  text-align: left;
}

.file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: #f5f5f5;
  border-radius: 4px;
  margin-bottom: 8px;
}

.file-name {
  font-size: 14px;
  color: #333;
}

.remove-btn {
  background: #ff4d4f;
  color: white;
  border: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 提交按钮 */
.form-actions {
  text-align: center;
  margin-top: 30px;
}

.submit-btn {
  background: #1890ff;
  color: white;
  border: none;
  padding: 12px 40px;
  border-radius: 4px;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s;
  min-width: 160px;
}

.submit-btn:hover:not(:disabled) {
  background: #40a9ff;
}

.submit-btn:disabled {
  background: #d9d9d9;
  cursor: not-allowed;
}



/* 响应式设计 */
@media (max-width: 768px) {
  .banner-content {
    flex-direction: column;
    text-align: center;
  }

  .banner-illustration {
    margin-top: 20px;
  }

  .main-title {
    font-size: 28px;
  }

  .sub-title {
    font-size: 18px;
  }

  .registration-form {
    padding: 20px;
  }
}
</style>
