import RPi.GPIO as gpio

from dataclasses import dataclass, field
from time import sleep


@dataclass
class Motor:
    pins: list[int] = field(default_factory=list)
    rev_steps: int = 24

    _delay: int = 0

    def __post_init__(self) -> None:
        self.set_speed(4)

    def setup(self) -> None:
        for pin in self.pins:
            gpio.setmode(pin, gpio.OUT)

    def step(self, steps: int) -> None:
        direction = int(steps / abs(steps))
        steps = abs(steps)

        if direction > 0:
            _steps = range(0, steps)
        else:
            _steps = range(steps, 0, -1)

        for i in _steps:
            self._step(i % 3)
            sleep(self._delay)

    def set_speed(self, rpm: int) -> None:
        self._delay = 60 * 1000 / self.rev_steps / rpm

    def _step(self, step_num: int):
        assert (step_num >= 0 and step_num < 3)

        confs = [[1, 0, 0], [0, 1, 0], [0, 0, 1]]
        conf = confs[step_num]

        for p, c in zip(self.pins, conf):
            gpio.output(p, c)