"""Payload transformation functions for vendor-specific device communication.

This module provides transformation functions to translate between abstract
home protocol payloads and vendor-specific device payloads.
"""

import logging
from typing import Any

logger = logging.getLogger(__name__)


def transform_abstract_to_vendor(
    device_type: str,
    device_technology: str,
    abstract_payload: dict[str, Any]
) -> dict[str, Any]:
    """Transform abstract payload to vendor-specific payload for SET commands.
    
    This function allows technology-specific transformations when sending commands
    to devices. For example, different vendors might use different field names or
    value formats for the same abstract concept.
    
    Args:
        device_type: Type of device (e.g., 'light', 'thermostat')
        device_technology: Technology identifier (e.g., 'zigbee2mqtt', 'tasmota')
        abstract_payload: Abstract payload following home protocol
        
    Returns:
        Vendor-specific payload for the device
        
    Example:
        Input:  {'power': 'on', 'brightness': 75}
        Output: {'state': 'ON', 'brightness': 75}  # hypothetical vendor format
    """
    logger.debug(
        f"transform_abstract_to_vendor IN: type={device_type}, tech={device_technology}, "
        f"payload={abstract_payload}"
    )
    
    # TODO: Implement technology-specific transformations here
    # Currently pass-through: return payload unchanged
    vendor_payload = abstract_payload
    
    logger.debug(
        f"transform_abstract_to_vendor OUT: type={device_type}, tech={device_technology}, "
        f"payload={vendor_payload}"
    )
    return vendor_payload


def transform_vendor_to_abstract(
    device_type: str,
    device_technology: str,
    vendor_payload: dict[str, Any]
) -> dict[str, Any]:
    """Transform vendor-specific payload to abstract payload for STATE messages.
    
    This function allows technology-specific transformations when receiving state
    updates from devices. For example, different vendors might report state using
    different field names or value formats.
    
    Args:
        device_type: Type of device (e.g., 'light', 'thermostat')
        device_technology: Technology identifier (e.g., 'zigbee2mqtt', 'tasmota')
        vendor_payload: Vendor-specific payload from the device
        
    Returns:
        Abstract payload following home protocol
        
    Example:
        Input:  {'state': 'ON', 'brightness': 75}  # hypothetical vendor format
        Output: {'power': 'on', 'brightness': 75}
    """
    logger.debug(
        f"transform_vendor_to_abstract IN: type={device_type}, tech={device_technology}, "
        f"payload={vendor_payload}"
    )
    
    # TODO: Implement technology-specific transformations here
    # Currently pass-through: return payload unchanged
    abstract_payload = vendor_payload
    
    logger.debug(
        f"transform_vendor_to_abstract OUT: type={device_type}, tech={device_technology}, "
        f"payload={abstract_payload}"
    )
    return abstract_payload