import time
import random
from machine import Pin, PWM, SPI
from ST7735 import TFT, TFTColor
from sysfont import sysfont


class Display:
    def __init__(self):
        self.lcd_backlight = PWM(Pin(17), freq=20000, duty=1023)
        self.backlight_level = 0  # to 100
        self.spi = SPI(1,
                       baudrate=20000000,
                       polarity=0,
                       phase=0,
                       sck=Pin(5),
                       mosi=Pin(18))
        self.tft = TFT(
            self.spi,
            aDC=19,
            aReset=16,  # not connected
            aCS=21)
        self.tft.rotation(2)
        self.tft.initr()
        self.tft.rgb(True)

        self.tft.fill(TFT.BLACK)
        # for x in range(0, self.tft.size()[0], 6):
        #     self.tft.line((0, 0), (x, self.tft.size()[1] - 1),
        #                   TFTColor(random.randrange(0, 256),
        #                            random.randrange(0, 256),
        #                            random.randrange(0, 256)))
    def startupText(self, row, msg):
        y1 = (row + 1) * 10
        self.tft.fillrect((0, y1), (128, 10), TFT.BLACK)
        self.tft.text((3, y1), msg, TFT.WHITE, sysfont)

    def backlight(self, new, step_sec=0.005):
        v = self.backlight_level
        while v != new:
            v = v + (-1 if v > new else (1 if v < new else 0))
            self.lcd_backlight.duty(v * 10)
            self.backlight_level = v
            time.sleep(step_sec)