import sys
from typing import Optional


class MLPipelineException(Exception):
    def __init__(self, error_message: str, error_detail: Optional[sys] = None):
        super().__init__(error_message)
        self.error_message = error_message
        
        if error_detail:
            _, _, exc_tb = error_detail.exc_info()
            if exc_tb:
                self.file_name = exc_tb.tb_frame.f_code.co_filename
                self.line_number = exc_tb.tb_lineno
            else:
                self.file_name = "Unknown"
                self.line_number = 0
        else:
            self.file_name = "Unknown"
            self.line_number = 0
    
    def __str__(self):
        return f"Error in {self.file_name} at line {self.line_number}: {self.error_message}"


class DataIngestionException(MLPipelineException):
    pass


class DataValidationException(MLPipelineException):
    pass


class DataTransformationException(MLPipelineException):
    pass


class FeatureEngineeringException(MLPipelineException):
    pass


class ModelTrainingException(MLPipelineException):
    pass


class ModelEvaluationException(MLPipelineException):
    pass


class ModelPusherException(MLPipelineException):
    pass


class ConfigurationException(MLPipelineException):
    pass