from time import sleep
import neopixel
import board

def defaultPattern(n, t):
    return (255, 0, 200)

class LightStrip:
  def __init__(self, data_pin = board.D18, string_length = 300, brightness = 1, pixel_order = neopixel.GRB):
        self.data_pin = data_pin

        self.np = neopixel.NeoPixel(self.data_pin, string_length, brightness = brightness, auto_write=True, pixel_order = pixel_order)
        self.pattern = defaultPattern
        self.cur_tick = 0

  def set_light_level(self, level):
    self.np.brightness = level
  def pattern(self, pattern_callback):
    self.pattern = pattern_callback
  
  def tick(self):
    np = self.np
    t = self.cur_tick
    n = np.n
    for i in range(n):
      col = self.pattern(i, t)
      if np[i] != col:
        #np[i] = col
        print("CHANGE COLOR OF PIXEL {} ON TICK {}".format(col, t))
        break;
    self.cur_tick = t + 1