import sys
from contextlib import asynccontextmanager

try:
    import asyncore
except ImportError:
    import pyasyncore

    sys.modules['asyncore'] = pyasyncore
import logging.config

import uvicorn
from fastapi import FastAPI, Depends
from fastapi import HTTPException
from fastapi.responses import JSONResponse

from app.api.api_route import router
from app.core.config import settings, load_nacos_config, get_settings, Settings, register_service_to_nacos, deregister_service_from_nacos, nacos_initialized_successfully
from app.schemas.response_template import ResponseModel
from logging_env import LOGGER_CONFIG_DICT
from starlette.middleware.cors import CORSMiddleware

logging.config.dictConfig(LOGGER_CONFIG_DICT)
logging.getLogger("pika").setLevel(logging.WARNING)

logger = logging.getLogger(__name__)


@asynccontextmanager
async def lifespan(app: FastAPI):
    # 启动阶段
    try:
        await load_nacos_config()  # 里面已包含配置加载 + 服务注册
        logger.info(f"🚀 服务启动完成 | SERVE_ENV={settings.SERVE_ENV} | PORT={settings.PORT} | Nacos={'已连接' if nacos_initialized_successfully else '未连接（使用.env）'}")
    except Exception as e:
        logger.error(f"启动时发生严重错误: {e}")
        raise

    yield

    # 关闭阶段（优雅下线）
    await deregister_service_from_nacos()
    # 如果有 nacos client，可以在这里 shutdown
    logger.info("✅ 服务已优雅关闭")


app = FastAPI(lifespan=lifespan, docs_url="/docs", redoc_url='/re-docs', openapi_url=f"/openapi.json", description=''' Base frame with FastAPI - Super Resolution API ''')
app.add_middleware(CORSMiddleware, allow_origins=["*"], allow_credentials=True, allow_methods=["*"], allow_headers=["*"], )
app.include_router(router=router)


@app.exception_handler(HTTPException)
async def http_exception_handler(exc: HTTPException):
    return JSONResponse(
        status_code=exc.status_code,
        content=ResponseModel(code=exc.status_code, msg=exc.detail, data=exc.detail).dict()
    )


@app.get("/health")
async def health():
    return {"status": "ok", "env": settings.SERVE_ENV}


@app.get("/config")
async def show_config(s: Settings = Depends(get_settings)):
    """查看当前完整配置（生产环境建议加权限）"""
    return s.model_dump()


if __name__ == '__main__':
    uvicorn.run(app, host="0.0.0.0", port=settings.PORT)