# imports
from machine import Pin
from neopixel import NeoPixel
import display
#import time
import math

brightness = 50 # brightness in %

def lightup(pressed):
    if pressed:
      lightup_led

def lightup_led(): 
    # Pin 19 controls the power supply to SD card and neopixels
    powerPin = Pin(19, Pin.OUT)

    # Pin 5 is the LED's data line
    dataPin = Pin(5, Pin.OUT)

    # create a neopixel object for 5 pixels
    np = NeoPixel(dataPin, 5)

    # turn on power to the LEDs
    powerPin.on()

    # set some colors for the pixels (RGB)
    np[0] = list(map(bri, [255,0,0]))   # RED
    np[1] = list(map(bri, [0,255,0]))   # GREEN
    np[2] = list(map(bri, [0,0,255]))   # BLUE
    np[3] = list(map(bri, [255,255,0])) # YELLOW
    np[4] = list(map(bri, [255,0,255])) # MAGENTA

    # send colors out to LEDs
    np.write()

def brightup_btn(pressed):
  if pressed:
    brightup()

def brightup():
  global brightness
  brightness = (brightness + 10) % 100
  lightup_led()

def brightdown_btn(pressed):
  if pressed:
    brightdown()
	
def brightdown():
  global brightness
  brightness = (brightness - 10) % 100
  lightup_led()

def brightanimation(pressed):
  if pressed: 
    global brightness
    b = [round(100 * pow(math.sin(math.radians(x * 9 / 2)), 2)) for x in range(40)]
    for i in range(40):
      brightness = b[i]
      lightup_led()
      #time.sleep(0.2)

def bri(pos):
    pos = round(pos/100* brightness)
    return pos