import logging
from uuid import uuid4

from fastapi import FastAPI, Request
from fastapi.responses import JSONResponse

from app.core.exceptions import AppError

logger = logging.getLogger(__name__)


def register_exception_handlers(app: FastAPI) -> None:
    @app.exception_handler(AppError)
    async def handle_app_error(request: Request, exc: AppError) -> JSONResponse:
        return JSONResponse(
            status_code=exc.status_code,
            content={
                "error": {
                    "code": exc.code,
                    "message": exc.message,
                    "details": exc.details,
                    "request_id": getattr(request.state, "request_id", None),
                }
            },
        )

    @app.exception_handler(Exception)
    async def handle_unexpected_error(request: Request, exc: Exception) -> JSONResponse:
        error_id = str(uuid4())
        logger.exception("Unhandled exception error_id=%s", error_id)
        return JSONResponse(
            status_code=500,
            content={
                "error": {
                    "code": "INTERNAL_SERVER_ERROR",
                    "message": "服务器内部错误",
                    "error_id": error_id,
                    "request_id": getattr(request.state, "request_id", None),
                }
            },
        )