import os
from fastapi import FastAPI, HTTPException
from fastapi.middleware.cors import CORSMiddleware
from fastapi.staticfiles import StaticFiles
from fastapi.responses import FileResponse
from dotenv import load_dotenv
import uvicorn

from models import RealEstateQuery, ParsedRealEstate
from openai_parser import OpenAIParser
from region_converter import RegionCodeConverter

load_dotenv()

app = FastAPI(title="부동산 검색 API")

# CORS 설정
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# OpenAI 파서 초기화
try:
    parser = OpenAIParser()
except ValueError as e:
    print(f"Warning: {e}")
    parser = None

# 지역 코드 변환기 초기화
region_converter = RegionCodeConverter()

@app.get("/")
async def serve_index():
    """메인 페이지 제공"""
    return FileResponse("../frontend/index.html")

@app.post("/api/parse", response_model=ParsedRealEstate)
async def parse_real_estate(query: RealEstateQuery):
    """자연어 입력을 파싱하여 부동산 정보 추출"""
    if not parser:
        raise HTTPException(
            status_code=500,
            detail="OpenAI API key not configured. Please set OPENAI_API_KEY in .env file"
        )
    
    try:
        result = await parser.parse_real_estate_query(query.text)
        
        # 위치 정보를 시군구 코드로 변환
        if result.location:
            region_code, region_name = region_converter.get_region_code(result.location)
            result.region_code = region_code
            result.region_name = region_name
        
        return result
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))

# 정적 파일 서빙 (CSS, JS)
app.mount("/static", StaticFiles(directory="../frontend"), name="static")

if __name__ == "__main__":
    host = os.getenv("HOST", "0.0.0.0")
    port = int(os.getenv("PORT", 20001))
    
    print(f"Starting server at http://localhost:{port}")
    uvicorn.run(app, host=host, port=port, reload=True)