import utime


class BarGraph:
    def __init__(self, driver):
        self.driver = driver

    def run(self, preset):
        colors = preset.c if preset.c else [(0, 255, 0), (255, 80, 0)]
        last_update = utime.ticks_ms()
        while True:
            delay_ms = max(1, int(preset.d))
            now = utime.ticks_ms()
            if utime.ticks_diff(now, last_update) >= delay_ms:
                level = max(0, min(100, int(preset.n1) if int(preset.n1) >= 0 else 50))
                target = (self.driver.num_leds * level) // 100
                lit = self.driver.apply_brightness(colors[0], preset.b)
                unlit = self.driver.apply_brightness(
                    preset.background_or(colors),
                    preset.b,
                )
                for i in range(self.driver.num_leds):
                    self.driver.n[i] = lit if i < target else unlit
                self.driver.n.write()
                last_update = utime.ticks_add(last_update, delay_ms)
                if not preset.a:
                    yield
                    return
            yield