interface UserProfile {
  // 基础信息
  id: string;
  name: string;
  region?: string;
  
  // 专业信息
  userRoleString?: string;
  skills: string[];
  currentWorkOn?: string;
  
  // 资源匹配
  whatICanOffer?: string;
  whatIAmLookingFor?: string;
  
  // 社交信息
  preferredContact?: string;
  bio?: string;
  
  // 行为数据
  eventHistory: string[]; // 历史参与活动
  projectHistory: string[]; // 历史参与项目
}

interface EventContext {
  id: string;
  title: string;
  type: EventType;
  tags: string[];
  description: string;
  organizationId?: string;
  
  // 参与者信息
  registrations: Registration[];
  
  // 相关项目
  projects?: ProjectSubmission[];
}

const generateRecommendationPrompt = (user: UserProfile, event: EventContext, otherParticipants: UserProfile[]) => {
  return `
    基于以下信息，为用户生成个性化的活动推荐：
    
    当前用户信息：
    - 角色：${user.userRoleString}
    - 技能：${user.skills.join(', ')}
    - 正在寻找：${user.whatIAmLookingFor}
    - 可以提供：${user.whatICanOffer}
    - 地区：${user.region}
    
    活动信息：
    - 名称：${event.title}
    - 类型：${event.type}
    - 标签：${event.tags.join(', ')}
    
    其他参与者信息：
    ${otherParticipants.map(p => `
      - ${p.name}：${p.userRoleString}，技能：${p.skills.join(', ')}，寻找：${p.whatIAmLookingFor}
    `).join('\n')}
    
    请推荐：
    1. 3个最匹配的参与者，并说明匹配理由
    2. 2个可能感兴趣的项目方向
    3. 给出具体的networking建议
    
    返回JSON格式的推荐结果。
  `;
};

interface AIRecommendationCard {
  title: string; // "AI为您推荐"
  subtitle: string; // "基于您的个人信息和活动特征"
  sections: {
    people: RecommendedPerson[];
    projects: RecommendedProject[];
    content: RecommendedContent[];
  };
  actions: {
    refresh: () => void; // 刷新推荐
    feedback: (helpful: boolean) => void; // 推荐反馈
  };
}

┌─────────────────┐     ┌─────────────────┐     ┌─────────────────┐
│   Frontend      │────▶│   API Server    │────▶│   AI Service    │
│  (Next.js)      │     │    (Hono)       │     │   (OpenAI)      │
└─────────────────┘     └─────────────────┘     └─────────────────┘
                               │
                               ▼
                        ┌─────────────────┐
                        │   Database      │
                        │  (PostgreSQL)   │
                        └─────────────────┘

model AIRecommendation {
  id              String   @id @default(cuid())
  userId          String
  eventId         String
  type            RecommendationType // PEOPLE | PROJECT | CONTENT
  recommendations Json     // 推荐结果JSON
  createdAt       DateTime @default(now())
  expiresAt       DateTime // 过期时间
  
  user            User     @relation(fields: [userId], references: [id])
  event           Event    @relation(fields: [eventId], references: [id])
  
  @@index([userId, eventId])
  @@map("ai_recommendation")
}

model RecommendationFeedback {
  id              String   @id @default(cuid())
  userId          String
  recommendationId String
  helpful         Boolean
  comment         String?
  createdAt       DateTime @default(now())
  
  user            User     @relation(fields: [userId], references: [id])
  recommendation  AIRecommendation @relation(fields: [recommendationId], references: [id])
  
  @@map("recommendation_feedback")
}

enum RecommendationType {
  PEOPLE
  PROJECT
  CONTENT
}

GET /api/events/{eventId}/recommendations
Headers: Authorization: Bearer {token}

Response:
{
  "recommendations": {
    "people": [...],
    "projects": [...],
    "content": [...]
  },
  "generatedAt": "2025-01-14T10:00:00Z",
  "expiresAt": "2025-01-15T10:00:00Z"
}

POST /api/events/{eventId}/recommendations/refresh
Headers: Authorization: Bearer {token}

POST /api/recommendations/{recommendationId}/feedback
Headers: Authorization: Bearer {token}
Body: {
  "helpful": true,
  "comment": "很有帮助"
}

# 已添加到 .env.local
DEEPSEEK_API_KEY=sk-J31elORQk1Oy69gu57JqvRTptMWZo5t4ZvN4NFQ8tmZHZxkj
DEEPSEEK_BASE_URL=https://aiproxy.gzg.sealos.run
DEEPSEEK_MODEL=deepseek-v3.1