// 82shops Premium Intelligence Gateway Service
export interface Listing {
  id: string;
  title: string;
  description: string;
  price: string;
  assetType: "physical" | "digital" | "hybrid";
  realtyInfo?: {
    location: string;
    sqft: number;
  };
}

export interface BuyerPreference {
  budget: string;
  interests: string[];
  lookingFor: string;
}

export interface MatchResult {
  listingId: string;
  score: number;
  reason: string;
  agentRecommendation: string;
}

// [핵심] API_KEY와 유료 모델 주소 설정
const API_KEY = "사용자님의_유료_API_KEY"; // 여기에 실제 키를 넣으세요
const API_URL = `https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash:generateContent?key=${API_KEY}`;

export async function matchBuyerWithSellers(
  preferences: BuyerPreference,
  listings: Listing[]
): Promise<MatchResult[]> {
  
  const systemInstruction = `You are the Senior Global Broker for 82shops. 
  Connect crypto-wealthy buyers with luxury realty. 
  Focus on "Crypto-Realty" lifestyle, security, and elite investment. 
  Always use Google Search to find current Dubai real estate trends.`;

  const prompt = `
    Buyer Preferences: ${JSON.stringify(preferences)}
    Available Listings: ${JSON.stringify(listings)}
    
    Based on real-time market data, provide a JSON array of matches.
    Each match must have: listingId, score(0-100), reason, agentRecommendation.
  `;

  try {
    const response = await fetch(API_URL, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({
        contents: [{ role: "user", parts: [{ text: prompt }] }],
        tools: [{ google_search_retrieval: {} }], // 구글 검색 엔진 탑재
        system_instruction: { parts: [{ text: systemInstruction }] }
      })
    });

    if (!response.ok) {
      const errorData = await response.json();
      console.error("Gemini API Error:", errorData);
      return [];
    }

    const data = await response.json();
    // AI의 답변 텍스트에서 JSON 추출 (정규식 사용으로 안전하게 처리)
    const textResponse = data.candidates[0].content.parts[0].text;
    const jsonMatch = textResponse.match(/\[.*\]/s);
    return jsonMatch ? JSON.parse(jsonMatch[0]) : [];

  } catch (error) {
    console.error("Gemini matching error:", error);
    return [];
  }
}