from __future__ import annotations


class AppException(Exception):
    def __init__(self, status_code: int, detail: str):
        self.status_code = status_code
        self.detail = detail


class NotFoundException(AppException):
    def __init__(self, detail: str = "Resource not found"):
        super().__init__(status_code=404, detail=detail)


class UnauthorizedException(AppException):
    def __init__(self, detail: str = "Not authenticated"):
        super().__init__(status_code=401, detail=detail)


class ForbiddenException(AppException):
    def __init__(self, detail: str = "Permission denied"):
        super().__init__(status_code=403, detail=detail)


class ConflictException(AppException):
    def __init__(self, detail: str = "Resource already exists"):
        super().__init__(status_code=409, detail=detail)


class ValidationException(AppException):
    def __init__(self, detail: str = "Validation error"):
        super().__init__(status_code=422, detail=detail)