# Library containing the class interface to create a new LED light display.

import board
import neopixel
from PIL import Image
from adafruit_pixel_framebuf import PixelFramebuffer
import time
import argparse


class LightDisplay:
    def __init__(self, x=8, y=8, orientation="vertical", color="red", speed=1):
        self.x = x
        self.y = y
        self.orientation = orientation
        self.color = color
        self.speed = speed

    def display(self, message="Hello World"):
        # Init variables
        gpio_pin = board.D18
        pixel_width = self.x
        scroll_width = pixel_width + 1
        pixel_height = self.y
        scroll_height = pixel_height + 1
        pixel_max = pixel_width * pixel_height - 1
        led_message = self.message 

        # Process arguments
        parser = argparse.ArgumentParser()
        parser.add_argument('-c', '--clear', action='store_true', help='clear the display on exit')
        args = parser.parse_args()

        # Create NeoPixel object with appropriate configuration.
        neo_pixel = neopixel.NeoPixel(gpio_pin, pixel_width * pixel_height, brightness=0.1, auto_write=False)

        #Create PixelFramebuffer object with appropriate configuration.
        pixel_framebuf = PixelFramebuffer(neo_pixel, pixel_width, pixel_height, reverse_x=True,alternating=True)

        print ('Press Ctrl-C to quit.')

        if not args.clear:
            print('Use "-c" argument to clear LEDs on exit')

        try:
            while True:
                led_message_len = len(led_message)
                led_message_scroll_height = led_message_len * 16

                for led_scroll in range(0, led_message_scroll_height , 1):
                    led_char_counter = 1
                    pixel_framebuf.fill(0x000000)
                   # pixel_framebuf.display()
                
                    for led_char in led_message:
                        led_char_spacing = 8 * led_char_counter
                        led_char_pos = pixel_height - led_scroll + led_char_spacing
                        pixel_framebuf.text(led_char, 0, led_char_pos , 0x00FF00)
                        led_char_counter += 1

                    pixel_framebuf.display()
                    time.sleep(25/500)

        except KeyboardInterrupt:
            if args.clear:
                neo_pixel.deinit()