from typing import Any, Dict, Optional

from fastapi import HTTPException, status


class AuthError(HTTPException):
    """Authentication error."""

    def __init__(
        self,
        detail: str = "Authentication error",
        headers: Optional[Dict[str, Any]] = None,
    ):
        super().__init__(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail=detail,
            headers=headers or {"WWW-Authenticate": "Bearer"},
        )


class ForbiddenError(HTTPException):
    """Permission denied error."""

    def __init__(self, detail: str = "Permission denied"):
        super().__init__(
            status_code=status.HTTP_403_FORBIDDEN,
            detail=detail,
        )


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

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


class BadRequestError(HTTPException):
    """Bad request error."""

    def __init__(self, detail: str = "Bad request"):
        super().__init__(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=detail,
        )