sensor_factory.py

"""
sensor_factory.py
Factory pattern for creating sensor instances.
Switches between MockSensor and YoLinkSensor based on config.
"""

import json
import logging
from pathlib import Path
from src.sensor_interface import SensorInterface
from src.mock_sensor import MockSensor

logger = logging.getLogger(__name__)


def create_sensor(settings_path: str = "config/settings.json") -> SensorInterface:
    """Instantiate the appropriate sensor backend based on sensor_mode in settings."""
    settings_file = Path(settings_path)

    if not settings_file.exists():
        raise FileNotFoundError(f"Settings file not found: {settings_path}")

    with open(settings_file, 'r') as f:
        settings = json.load(f)

    mode = settings.get('sensor_mode', 'mock')

    if mode == 'mock':
        logger.info("Running in DEMO mode with MockSensor")
        return MockSensor()

    elif mode == 'yolink':
        logger.info("Running in PRODUCTION mode with YoLinkSensor")
        try:
            from src.yolink_sensor import YoLinkSensor
        except ImportError:
            raise ImportError("YoLinkSensor not yet implemented")

        yolink_config = settings.get('yolink', {})
        api_key = yolink_config.get('api_key')
        base_url = yolink_config.get('base_url')

        if not api_key or api_key == "YOUR_API_KEY_HERE":
            raise ValueError("YoLink API key not configured in settings.json")

        return YoLinkSensor(api_key=api_key, base_url=base_url)

    else:
        raise ValueError(f"Invalid sensor_mode in settings: '{mode}'. Must be 'mock' or 'yolink'")