"""Custom application exceptions."""


class AppException(Exception):
    """Base application exception."""

    def __init__(self, message: str, status_code: int = 500):
        """Initialize application exception.

        Args:
            message: Error message.
            status_code: HTTP status code.
        """
        self.message = message
        self.status_code = status_code
        super().__init__(self.message)


class NotFoundError(AppException):
    """Resource not found error."""

    def __init__(self, message: str = "Resource not found"):
        """Initialize not found error.

        Args:
            message: Error message.
        """
        super().__init__(message, status_code=404)


class ValidationError(AppException):
    """Validation error."""

    def __init__(self, message: str = "Validation failed"):
        """Initialize validation error.

        Args:
            message: Error message.
        """
        super().__init__(message, status_code=400)


class UnauthorizedError(AppException):
    """Authentication required."""

    def __init__(self, message: str = "Unauthorized"):
        """Initialize unauthorized error.

        Args:
            message: Error message.
        """
        super().__init__(message, status_code=401)


class ForbiddenError(AppException):
    """Permission denied."""

    def __init__(self, message: str = "Forbidden"):
        """Initialize forbidden error.

        Args:
            message: Error message.
        """
        super().__init__(message, status_code=403)