import time
from neopixel import *
import numpy as np

# LED strip configuration:
LED_COUNT      = 60      # Number of LED pixels.
LED_PIN        = 12      # GPIO pin connected to the pixels (18 uses PWM!).
LED_FREQ_HZ    = 800000  # LED signal frequency in hertz (usually 800khz)
LED_DMA        = 5       # DMA channel to use for generating signal (try 5)
LED_BRIGHTNESS = 20      # 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
LED_STRIP      = ws.WS2811_STRIP_GRB   # Strip type and colour ordering

def setPixelsWithArray(strip, a):
	for i in range(strip.numPixels()):
		strip.setPixelColor(i, Color(int(a[i,0]), int(a[i,1]), int(a[i,2])))
	strip.show()

def normalizeArray255(a):
	return 255 * a/np.amax(a)

def colorWipe(strip, color, wait_ms=50):
	"""Wipe color across display a pixel at a time."""
	for i in range(strip.numPixels()):
		strip.setPixelColor(i, color)
		strip.show()
		time.sleep(wait_ms/1000.0)

def colorWipeSym(strip, color, wait_ms=50):
	"""Wipe color across display a pixel at a time."""
	for i in range(strip.numPixels()//2):
		strip.setPixelColor(i, color)
		strip.setPixelColor(strip.numPixels()-i-1, color)
		strip.show()
		time.sleep(wait_ms/1000.0)
		
def theaterChase(strip, color, wait_ms=50, iterations=10):
	"""Movie theater light style chaser animation."""
	for j in range(iterations):
		for q in range(3):
			for i in range(0, strip.numPixels(), 3):
				strip.setPixelColor(i+q, color)
			strip.show()
			time.sleep(wait_ms/1000.0)
			for i in range(0, strip.numPixels(), 3):
				strip.setPixelColor(i+q, 0)

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 rainbow(strip, wait_ms=20, iterations=1):
	"""Draw rainbow that fades across all pixels at once."""
	for j in range(256*iterations):
		for i in range(strip.numPixels()):
			strip.setPixelColor(i, wheel((i+j) & 255))
		strip.show()
		time.sleep(wait_ms/1000.0)

def rainbowCycle(strip, wait_ms=20, iterations=5):
	"""Draw rainbow that uniformly distributes itself across all pixels."""
	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 theaterChaseRainbow(strip, wait_ms=50):
	"""Rainbow movie theater light style chaser animation."""
	for j in range(256):
		for q in range(3):
			for i in range(0, strip.numPixels(), 3):
				strip.setPixelColor(i+q, wheel((i+j) % 255))
			strip.show()
			time.sleep(wait_ms/1000.0)
			for i in range(0, strip.numPixels(), 3):
				strip.setPixelColor(i+q, 0)

