"""Base class for UPS drivers."""
from abc import ABC, abstractmethod
from dataclasses import dataclass
from typing import Optional


@dataclass
class UPSData:
    """Battery data from UPS hardware."""
    percentage: float  # 0-100%
    voltage: float  # mV
    current: float  # A (positive=charging, negative=discharging)
    is_charging: bool
    temperature: Optional[float] = None  # Celsius
    time_remaining: Optional[int] = None  # Minutes


class UPSDriver(ABC):
    """Abstract base class for UPS hardware drivers."""

    @abstractmethod
    async def initialize(self) -> bool:
        """Initialize connection to UPS hardware.

        Returns:
            True if initialization successful, False otherwise
        """
        pass

    @abstractmethod
    async def read_data(self) -> UPSData:
        """Read current battery data from UPS.

        Returns:
            UPSData object with current readings
        """
        pass

    @abstractmethod
    async def is_available(self) -> bool:
        """Check if UPS hardware is available.

        Returns:
            True if hardware is accessible, False otherwise
        """
        pass

    @abstractmethod
    def close(self):
        """Close connection to UPS hardware."""
        pass

    @abstractmethod
    def get_model_name(self) -> str:
        """Get the UPS model/type name.

        Returns:
            Human-readable model name
        """
        pass