from fastapi import FastAPI, Request
from fastapi.exceptions import HTTPException
from pydantic_validation_decorator import FieldValidationError
from exceptions.exception import AuthException, PermissionException, ModelValidatorException
from utils.response_util import ResponseUtil, JSONResponse, jsonable_encoder


def handle_exception(app: FastAPI):
    """
    全局异常处理
    """
    # 自定义token检验异常
    @app.exception_handler(AuthException)
    async def auth_exception_handler(request: Request, exc: AuthException):
        return ResponseUtil.unauthorized(data=exc.data, msg=exc.message)

    # 自定义权限检验异常
    @app.exception_handler(PermissionException)
    async def permission_exception_handler(request: Request, exc: PermissionException):
        return ResponseUtil.forbidden(data=exc.data, msg=exc.message)

    # 自定义模型检验异常
    @app.exception_handler(ModelValidatorException)
    async def model_validator_exception_handler(request: Request, exc: ModelValidatorException):
        return ResponseUtil.failure(data=exc.data, msg=exc.message)

    # 自定义模型检验异常
    @app.exception_handler(FieldValidationError)
    async def field_validation_error_handler(request: Request, exc: FieldValidationError):
        return ResponseUtil.failure(msg=exc.message)

    # 处理其他http请求异常
    @app.exception_handler(HTTPException)
    async def http_exception_handler(request: Request, exc: HTTPException):
        return JSONResponse(
            content=jsonable_encoder({"code": exc.status_code, "msg": exc.detail}),
            status_code=exc.status_code
        )