import time
from rpi_ws281x import *
import configparser
import os

# LED strip configuration:
LED_COUNT      = 60      # Number of LED pixels.
LED_PIN        = 18      # GPIO pin connected to the pixels (18 uses PWM!).
#LED_PIN        = 10      # GPIO pin connected to the pixels (10 uses SPI /dev/spidev0.0).
LED_FREQ_HZ    = 800000  # LED signal frequency in hertz (usually 800khz)
LED_DMA        = 10      # DMA channel to use for generating signal (try 10)
LED_BRIGHTNESS = 255     # Set to 0 for darkest and 255 for brightest
LED_INVERT     = False   # True to invert the signal (when using NPN transistor level shift)
LED_CHANNEL    = 0       # set to '1' for GPIOs 13, 19, 41, 45 or 53

def wheel(pos):
    """Generate rainbow colors across 0-255 positions."""
    if pos < 85:
        return Color(pos * 3, 255 - pos * 3, 0)
    elif pos < 170:
        pos -= 85
        return Color(255 - pos * 3, 0, pos * 3)
    else:
        pos -= 170
        return Color(0, pos * 3, 255 - pos * 3)
 
def rainbowCycle(strip, wait_ms=10, iterations=10):
    for j in range(256*iterations):
        for i in range(strip.numPixels()):
            strip.setPixelColor(i, wheel((int(i * 256 / strip.numPixels()) + j) & 255))
        strip.show()
        time.sleep(wait_ms/1000.0)
    
def setColor(strip, color, iterations=10, wait_ms=10):
    for i in range(strip.numPixels()):
        strip.setPixelColor(i, color)
    strip.show()
    time.sleep(wait_ms/1000.0)

def blink(strip, color1, color2, iterations=10, wait_ms=10):
    for i in range(strip.numPixels()):
        strip.setPixelColor(i, color1)
    strip.show()
    time.sleep(1)
    for i in range(strip.numPixels()):
        strip.setPixelColor(i, color2)
    strip.show()
    time.sleep(1)

if __name__ == '__main__':
    strip = Adafruit_NeoPixel(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL)
    strip.begin()

    try:
        while True:
            #blink(strip, Color(255,0,0), Color(255,255,255))
            #setColor(strip, Color(255,0,0))
            rainbowCycle(strip)
    except KeyboardInterrupt:
        setColor(strip, Color(0,0,0))