"""Custom application exceptions with consistent error responses."""
from fastapi import HTTPException, status


class AppError(HTTPException):
    def __init__(self, detail: str, status_code: int = 400):
        super().__init__(status_code=status_code, detail=detail)


class NotFoundError(AppError):
    def __init__(self, detail: str = "Resource not found"):
        super().__init__(detail=detail, status_code=status.HTTP_404_NOT_FOUND)


class ForbiddenError(AppError):
    def __init__(self, detail: str = "Insufficient permissions"):
        super().__init__(detail=detail, status_code=status.HTTP_403_FORBIDDEN)


class AuthError(AppError):
    def __init__(self, detail: str = "Authentication required"):
        super().__init__(detail=detail, status_code=status.HTTP_401_UNAUTHORIZED)


class ConflictError(AppError):
    def __init__(self, detail: str = "Conflict"):
        super().__init__(detail=detail, status_code=status.HTTP_409_CONFLICT)