"""test vendor transformations."""

import json
import logging
from typing import Any

logger = logging.getLogger(__name__)


def transform_contact_sensor_to_vendor(payload: dict[str, Any]) -> str:
    """Transform abstract contact sensor payload to MAX! format.
    
    Contact sensors are read-only.
    """
    logger.warning("Contact sensors are read-only - SET commands should not be used")
    return json.dumps(payload)


def transform_contact_sensor_to_abstract(payload: str) -> dict[str, Any]:
    try:
        contact_value = payload.strip().lower()
        return {
            "contact": "open" if (contact_value == "open") else "closed"
        }
    except (ValueError, TypeError) as e:
        logger.error(f"contact sensor failed to parse: {payload}, error: {e}")
        return {"contact": "closed"}


def transform_thermostat_to_vendor(payload: dict[str, Any]) -> str:
    if "target" not in payload:
        logger.warning(f"thermostat payload missing 'target': {payload}")
        return "21"
    
    target_temp = payload["target"]
    
    if isinstance(target_temp, (int, float)):
        int_temp = int(round(target_temp))
        return str(int_temp)
    
    logger.warning(f"invalid target temperature type: {type(target_temp)}")
    return "21"


def transform_thermostat_to_abstract(payload: str) -> dict[str, Any]:
    target_temp = float(payload.strip())
    
    return {
        "target": target_temp,
        "mode": "heat"
    }


# Registry of handlers for this vendor
HANDLERS = {
    ("contact_sensor", "to_vendor"): transform_contact_sensor_to_vendor,
    ("contact_sensor", "to_abstract"): transform_contact_sensor_to_abstract,
    ("contact", "to_vendor"): transform_contact_sensor_to_vendor,
    ("contact", "to_abstract"): transform_contact_sensor_to_abstract,
    ("thermostat", "to_vendor"): transform_thermostat_to_vendor,
    ("thermostat", "to_abstract"): transform_thermostat_to_abstract,
}