"""Hottis PV Modbus vendor transformations."""

import json
import logging
from typing import Any

logger = logging.getLogger(__name__)


def transform_relay_to_vendor(payload: dict[str, Any]) -> str:
    """Transform abstract relay payload to Hottis Modbus format.
    
    Hottis Modbus expects plain text 'on' or 'off'.
    
    Example:
    - Abstract: {'power': 'on'}
    - Hottis Modbus: 'on'
    """
    power = payload.get("power", "off")
    return power


def transform_relay_to_abstract(payload: str) -> dict[str, Any]:
    """Transform Hottis Modbus relay payload to abstract format.
    
    Hottis Modbus sends JSON like:
    {"status": "Ok", "timestamp": "...", "state": false, "cnt": 528}
    
    Transformations:
    - state: true  -> power: 'on'
    - state: false -> power: 'off'
    """
    data = json.loads(payload)
    state = data.get("state", False)
    power = "on" if bool(state) else "off"
    return {"power": power}


def transform_three_phase_powermeter_to_vendor(payload: dict[str, Any]) -> str:
    """Transform abstract three_phase_powermeter payload to hottis_pv_modbus format."""
    vendor_payload = {
        "energy": payload.get("energy", 0.0),
        "total_power": payload.get("total_power", 0.0),
        "phase1_power": payload.get("phase1_power", 0.0),
        "phase2_power": payload.get("phase2_power", 0.0),
        "phase3_power": payload.get("phase3_power", 0.0),
        "phase1_voltage": payload.get("phase1_voltage", 0.0),
        "phase2_voltage": payload.get("phase2_voltage", 0.0),
        "phase3_voltage": payload.get("phase3_voltage", 0.0),
        "phase1_current": payload.get("phase1_current", 0.0),
        "phase2_current": payload.get("phase2_current", 0.0),
        "phase3_current": payload.get("phase3_current", 0.0),
    }
    return json.dumps(vendor_payload)


def transform_three_phase_powermeter_to_abstract(payload: str) -> dict[str, Any]:
    """Transform hottis_pv_modbus three_phase_powermeter payload to abstract format.
    
    Transformations:
    - totalImportEnergy        -> energy
    - powerL1/powerL2/powerL3  -> phase1_power/phase2_power/phase3_power
    - voltageL1/voltageL2/voltageL3 -> phase1_voltage/phase2_voltage/phase3_voltage
    - currentL1/currentL2/currentL3 -> phase1_current/phase2_current/phase3_current
    - Sum of powerL1..3        -> total_power
    """
    data = json.loads(payload)

    def _get_float(key: str, default: float = 0.0) -> float:
        return float(data.get(key, default))

    phase1_power = _get_float("powerL1")
    phase2_power = _get_float("powerL2")
    phase3_power = _get_float("powerL3")

    phase1_voltage = _get_float("voltageL1")
    phase2_voltage = _get_float("voltageL2")
    phase3_voltage = _get_float("voltageL3")

    phase1_current = _get_float("currentL1")
    phase2_current = _get_float("currentL2")
    phase3_current = _get_float("currentL3")

    energy = _get_float("totalImportEnergy")

    return {
        "energy": energy,
        "total_power": phase1_power + phase2_power + phase3_power,
        "phase1_power": phase1_power,
        "phase2_power": phase2_power,
        "phase3_power": phase3_power,
        "phase1_voltage": phase1_voltage,
        "phase2_voltage": phase2_voltage,
        "phase3_voltage": phase3_voltage,
        "phase1_current": phase1_current,
        "phase2_current": phase2_current,
        "phase3_current": phase3_current,
    }


# Registry of handlers for this vendor
HANDLERS = {
    ("relay", "to_vendor"): transform_relay_to_vendor,
    ("relay", "to_abstract"): transform_relay_to_abstract,
    ("three_phase_powermeter", "to_vendor"): transform_three_phase_powermeter_to_vendor,
    ("three_phase_powermeter", "to_abstract"): transform_three_phase_powermeter_to_abstract,
}