# memory_structurer.py

import logging
from typing import List, Dict, Any, Optional

from aeiva.cognition.memory.memory_unit import MemoryUnit
from aeiva.cognition.memory.memory_link import MemoryLink


class MemoryStructurerError(Exception):
    """Exception raised when an error occurs in the MemoryStructurer."""
    pass


class MemoryStructurer:
    """
    A class to structure memory units based on various structuring algorithms.

    Supported structure types:
        - 'structure_type_example': Placeholder for future structuring algorithms.
    """

    def __init__(self):
        """
        Initializes the MemoryStructurer.

        Currently, no initialization parameters are required.
        """
        self.logger = logging.getLogger(self.__class__.__name__)
        self.logger.debug("Initialized MemoryStructurer without default parameters.")

    def structure(
        self,
        memory_units: List[MemoryUnit],
        structure_type: str,
        **kwargs
    ) -> List[MemoryUnit]:
        """
        Structures the provided memory units based on the specified structure type.

        Args:
            memory_units (List[MemoryUnit]): The list of memory units to be structured.
            structure_type (str): The type of structuring algorithm to use ('structure_type_example').
            **kwargs: Additional parameters required for specific structurers.

        Returns:
            List[MemoryUnit]: The list of memory units after structuring.

        Raises:
            MemoryStructurerError: If an unknown structure_type is provided or if structuring fails.
        """
        self.logger.debug(f"Structuring memory units using structure_type='{structure_type}' with kwargs={kwargs}")
        try:
            if structure_type == 'structure_type_example':
                # Placeholder for actual structuring logic
                return self.structure_example(memory_units, **kwargs)
            else:
                self.logger.error(f"Unknown structure_type: {structure_type}")
                raise MemoryStructurerError(f"Unknown structure_type: {structure_type}")
        except MemoryStructurerError:
            # Re-raise custom errors without modification
            raise
        except Exception as e:
            self.logger.error(f"Failed to structure memory units: {e}")
            raise MemoryStructurerError(f"Failed to structure memory units: {e}")

    def structure_example(
        self,
        memory_units: List[MemoryUnit],
        **kwargs
    ) -> List[MemoryUnit]:
        """
        Example structuring method. Currently a placeholder that returns memory units unchanged.

        Args:
            memory_units (List[MemoryUnit]): The list of memory units to be structured.
            **kwargs: Additional parameters (currently unused).

        Returns:
            List[MemoryUnit]: The original list of memory units, unchanged.
        """
        self.logger.debug("Executing structure_example: No changes applied to memory units.")
        # Placeholder: No operation performed
        return memory_units

    # TODO: Implement additional structuring methods as needed in the future