import json
from abc import ABC, abstractmethod

import numpy as np

from ria_toolkit_oss.signal.block_generator.data_types import DataType


class Block(ABC):
    """
    Abstract base class for signal processing blocks.

    This class defines the interface for all signal processing blocks,
    including input and output data types and the call method for processing.
    """

    @property
    @abstractmethod
    def input_type(self) -> DataType:
        """
        Get the input data type for the block.

        :return: The input data type.
        :rtype: DataType
        """
        pass

    @property
    @abstractmethod
    def output_type(self) -> DataType:
        """
        Get the output data type for the block.

        :return: The output data type.
        :rtype: DataType
        """
        pass

    @abstractmethod
    def get_samples(self, num_samples) -> np.ndarray:
        """
        Process the input data and produce output.

        :param args: Positional arguments for the processing method.
        :param kwargs: Keyword arguments for the processing method.
        :return: The processed output data.
        :rtype: numpy array
        """
        pass

    def _get_metadata(self):
        metadata = {}
        for key, value in vars(self).items():
            try:
                # Try to serialize the value to check if it's JSON serializable
                json.dumps(value)
                metadata[f"BlockGenerator:{self.__class__.__name__}:{key}"] = value
            except (TypeError, ValueError):
                # If the value is not JSON serializable, skip it
                continue

        for block in self.input:
            metadata = self._combine_dicts_and_handle_double_keys(block._get_metadata(), metadata)

        return metadata

    # TODO improve this
    def _combine_dicts_and_handle_double_keys(self, source_dict, other_dict):
        for key, value in source_dict.items():
            # Find the last colon in the key
            last_colon_index = key.rfind(":")

            # Ensure there's at least one colon in the key
            if last_colon_index == -1:
                # If no colon, just append "(1)"
                new_key = f"{key}(1)"
            else:
                # Extract the prefix and the part after the last colon
                prefix = key[:last_colon_index]
                suffix = key[last_colon_index + 1 :]

                # Check if the suffix has a number inside parentheses
                if suffix.startswith("(") and suffix.endswith(")") and suffix[1:-1].isdigit():
                    # Extract the number inside the parentheses and increment it
                    number = int(suffix[1:-1]) + 1
                    new_key = f"{prefix}({number})"
                else:
                    # No number at the end, so just append "(1)"
                    new_key = f"{key}(1)"

            # Ensure the new key is unique in both dictionaries
            while new_key in other_dict:
                # Find the last parentheses to extract the current number
                last_paren_index = new_key.rfind(")")
                prefix = new_key[:last_paren_index]
                suffix = new_key[last_paren_index + 1 :]

                # Extract the number in parentheses and increment it
                if suffix.startswith("(") and suffix.endswith(")") and suffix[1:-1].isdigit():
                    number = int(suffix[1:-1]) + 1
                else:
                    number = 1  # Default to 1 if no number in parentheses

                # Create the new key with the incremented number
                new_key = f"{prefix}({number})"

            # Update the other dictionary with the new key
            other_dict[new_key] = value

        return other_dict

    @abstractmethod
    def __call__(self, *args, **kwargs) -> np.ndarray:
        """
        Process the input data and produce output.

        :param args: Positional arguments for the processing method.
        :param kwargs: Keyword arguments for the processing method.
        :return: The processed output data.
        :rtype: numpy array
        """
        pass