behavior_backend/app/core/exceptions.py

from fastapi import HTTPException, status

class VideoNotFoundError(HTTPException):
    """Exception raised when a video is not found."""
    
    def __init__(self, video_id: str):
        super().__init__(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Video with ID {video_id} not found"
        )

class ResultNotFoundError(HTTPException):
    """Exception raised when a processing result is not found."""
    
    def __init__(self, video_id: str):
        super().__init__(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Processing result for video with ID {video_id} not found"
        )

class VideoUploadError(HTTPException):
    """Exception raised when there is an error uploading a video."""
    
    def __init__(self, detail: str = "Error uploading video"):
        super().__init__(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=detail
        )

class VideoProcessingError(HTTPException):
    """Exception raised when there is an error processing a video."""
    
    def __init__(self, detail: str = "Error processing video"):
        super().__init__(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=detail
        )

class InvalidParameterError(HTTPException):
    """Exception raised when a parameter is invalid."""
    
    def __init__(self, parameter: str, detail: str = None):
        super().__init__(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=detail or f"Invalid parameter: {parameter}"
        )

class DatabaseError(HTTPException):
    """Exception raised when there is a database error."""
    
    def __init__(self, detail: str = "Database error"):
        super().__init__(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=detail
        )