import neopixel
from machine import Pin
import time
from random import randint, random, seed

seed()

ws_pin = 0
led_zahl = 64
helligkeit = 0.05

matrix = neopixel.NeoPixel(Pin(ws_pin), led_zahl)

taster_hoch = Pin(1, Pin.IN, Pin.PULL_UP)
taster_runter = Pin(2, Pin.IN, Pin.PULL_UP)
taster_rechts = Pin(3, Pin.IN, Pin.PULL_UP)
taster_links = Pin(4, Pin.IN, Pin.PULL_UP)

scalar = float # a scale value (0.0 to 1.0)
def hsv2rgb(h:scalar, s:scalar, v:scalar) -> tuple:
    if s:
        if h == 1.0: h = 0.0
        i = int(h*6.0); f = h*6.0 - i
        
        w = int(255*( v * (1.0 - s) ))
        q = int(255*( v * (1.0 - s * f) ))
        t = int(255*( v * (1.0 - s * (1.0 - f)) ))
        v = int(255*v)
        
        if i==0: return (v, t, w)
        if i==1: return (q, v, w)
        if i==2: return (w, v, t)
        if i==3: return (w, q, v)
        if i==4: return (t, w, v)
        if i==5: return (v, w, q)
    else: v = int(255*v); return (v, v, v)

def zufall_farbe():
    return hsv2rgb(random(), 1.0, 1.0)

def setze_helligkeit(farbe):
    r, g, b = farbe
    r = int(r * helligkeit)
    g = int(g * helligkeit)
    b = int(b * helligkeit)
    return (r, g, b)

def setze_pixel(x, y, farbe):
    farbe = setze_helligkeit(farbe)
    i = y * 8 + x
    matrix[i] = farbe

def neue_position():
    x = randint(0, 7)
    y = randint(0, 7)
    return (x, y)

while True:
    matrix.fill((0, 0, 0))

    (x, y) = neue_position()
    setze_pixel(x, y, zufall_farbe())

    matrix.write()
    time.sleep(0.5)