from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from app.core.config import settings
from app.api.v1.api import api_router
from app.core.middleware import add_response_middleware
from app.core.exceptions import add_exception_handlers
from contextlib import asynccontextmanager

@asynccontextmanager
async def lifespan(app: FastAPI):
    # 在应用启动时执行
    from app.db.init_db import init_db
    await init_db()
    yield
    # 在应用关闭时执行
    # 清理代码可以放在这里

app = FastAPI(
    title=settings.PROJECT_NAME,
    description=settings.PROJECT_DESCRIPTION,
    version=settings.PROJECT_VERSION,
    lifespan=lifespan
)

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

# 添加响应中间件
add_response_middleware(app)

# 添加异常处理器
add_exception_handlers(app)

# 包含API路由
app.include_router(api_router, prefix=settings.API_V1_STR)

@app.get("/")
async def root():
    return {"message": "欢迎使用美搭Meida API服务"}

@app.get("/health")
async def health_check():
    return {"status": "healthy"}

if __name__ == "__main__":
    import uvicorn
    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)