from typing import Dict, Any
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from .llm_api import DeepseekInterface
from .search_api import GoogleSearch

def create_app(config: Dict[str, Any] = None) -> FastAPI:
    """
    创建并配置 FastAPI 应用
    """
    app = FastAPI(
        title="Travel RAG API",
        description="Travel recommendation system using RAG",
        version="1.0.0"
    )
    
    # 配置 CORS
    app.add_middleware(
        CORSMiddleware,
        allow_origins=["*"],
        allow_credentials=True,
        allow_methods=["*"],
        allow_headers=["*"],
    )
    
    # 初始化配置
    if config:
        app.state.config = config
        
        # 初始化 LLM
        app.state.llm = DeepseekInterface(
            api_key=config['deepseek_api_key'],
            base_url=config['llm_settings']['deepseek']['base_url'],
            model=config['llm_settings']['deepseek']['models'][0]
        )
        
        # 初始化搜索引擎在 init_app 中完成
        from .routes import init_app
        init_app(app)
    
    # 导入和注册路由
    from .routes import router
    app.include_router(router)
    
    return app

__all__ = ['create_app']