"""Custom HTTP exceptions for the API."""

from fastapi import HTTPException, status


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

    def __init__(self, detail: str = "Resource not found") -> None:
        super().__init__(status_code=status.HTTP_404_NOT_FOUND, detail=detail)


class ConflictError(HTTPException):
    """Conflict with current state (e.g., version mismatch)."""

    def __init__(self, detail: str = "Conflict with current state") -> None:
        super().__init__(status_code=status.HTTP_409_CONFLICT, detail=detail)


class UnauthorizedError(HTTPException):
    """Authentication required or failed."""

    def __init__(self, detail: str = "Not authenticated") -> None:
        super().__init__(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail=detail,
            headers={"WWW-Authenticate": "Bearer"},
        )


class ForbiddenError(HTTPException):
    """Insufficient permissions."""

    def __init__(self, detail: str = "Insufficient permissions") -> None:
        super().__init__(status_code=status.HTTP_403_FORBIDDEN, detail=detail)


class BadRequestError(HTTPException):
    """Invalid request data."""

    def __init__(self, detail: str = "Invalid request") -> None:
        super().__init__(status_code=status.HTTP_400_BAD_REQUEST, detail=detail)


class ValidationError(HTTPException):
    """Validation failed."""

    def __init__(self, detail: str = "Validation failed") -> None:
        super().__init__(status_code=status.HTTP_422_UNPROCESSABLE_ENTITY, detail=detail)


__all__ = [
    "BadRequestError",
    "ConflictError",
    "ForbiddenError",
    "NotFoundError",
    "UnauthorizedError",
    "ValidationError",
]