"""
Stub replacement for rpi_ws281x that allows running without a Raspberry Pi.
Pixel data is stored in memory; hardware calls are no-ops.
"""


def Color(r, g, b):
    return ((r & 0xFF) << 16) | ((g & 0xFF) << 8) | (b & 0xFF)


class _ws:
    WS2811_STRIP_GRB = 0x00081000


ws = _ws()


class PixelStrip:
    def __init__(self, num, pin, freq_hz=800000, dma=5, invert=False,
                 brightness=255, channel=0, strip_type=None, gamma=None):
        self._pixels = [0] * num

    def begin(self):
        pass

    def show(self):
        pass

    def setBrightness(self, brightness):
        pass

    def setPixelColor(self, n, color):
        if 0 <= n < len(self._pixels):
            self._pixels[n] = color

    def getPixelColor(self, n):
        if 0 <= n < len(self._pixels):
            return self._pixels[n]
        return 0