from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from contextlib import asynccontextmanager
import logging
from app.core.config import settings
from app.api.v1.api import api_router
from app.core.exceptions import add_exception_handlers
from app.core.middleware import add_response_middleware
from app.schemas.response import StandardResponse
from starlette.middleware.sessions import SessionMiddleware

# 配置日志
logging.basicConfig(
    level=logging.DEBUG,  # 设置为DEBUG级别以显示更多日志
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
)
logger = logging.getLogger(__name__)

@asynccontextmanager
async def lifespan(app: FastAPI):
    # 在应用启动时执行
    logger.info("应用启动，初始化数据库...")
    from app.db.init_db import init_db
    await init_db()
    logger.info("数据库初始化完成")
    yield
    # 在应用关闭时执行
    logger.info("应用关闭")

app = FastAPI(
    title=settings.PROJECT_NAME,
    description=settings.PROJECT_DESCRIPTION,
    version=settings.PROJECT_VERSION,
    lifespan=lifespan,
    openapi_url=f"{settings.API_V1_STR}/openapi.json"
)

logger.info("开始配置应用中间件和路由...")

# 配置CORS
app.add_middleware(
    CORSMiddleware,
    allow_origins=settings.BACKEND_CORS_ORIGINS,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)
logger.info("CORS中间件已添加")

# 添加Session中间件
app.add_middleware(
    SessionMiddleware,
    secret_key=settings.SECRET_KEY,
    session_cookie="session",
    max_age=1800  # 30分钟
)

# 添加异常处理器
add_exception_handlers(app)
logger.info("异常处理器已添加")

# add_response_middleware(app)
# logger.info("响应中间件已添加")

# 包含API路由
app.include_router(api_router, prefix=settings.API_V1_STR)
logger.info(f"API路由已添加，前缀: {settings.API_V1_STR}")

@app.get("/")
async def root():
    logger.info("访问根路径")
    return StandardResponse(code=200, data={"message": "欢迎使用美搭Meida API服务"})

@app.get("/health")
async def health_check():
    logger.debug("健康检查")
    return StandardResponse(code=200, data={"status": "healthy"})