import utime
import math
import machine
from machine import Pin
from machine import I2C
from lcd_api import LcdApi
from pico_i2c_lcd import I2cLcd

I2C_ADDR     = 0x27    # Decimal 39
I2C_NUM_ROWS = 2
I2C_NUM_COLS = 16

SDA_PIN = 0
SCL_PIN = 1
PLAY_PIN = 2
RESET_PIN = 3

print("Running StopWatch")

i2c = I2C(0, sda=machine.Pin(SDA_PIN), scl=machine.Pin(SCL_PIN), freq=400000)
lcd = I2cLcd(i2c, I2C_ADDR, I2C_NUM_ROWS, I2C_NUM_COLS)

button_play = Pin(PLAY_PIN, Pin.IN, Pin.PULL_UP)
button_reset = Pin(RESET_PIN, Pin.IN, Pin.PULL_UP)

lcd.putstr("Stopwatch")
utime.sleep(2)
lcd.clear()
lcd.hide_cursor()
timer = 0
running = False
lcd.clear()
# lcd.show_cursor()
# lcd.blinking()
lcd.putstr("Stopwatch")

while True:
    # If button pressed then toggle
    if (button_play.value() == False):
        running = not running
        print ("Status: "+str(running))
        # sleep prevents single press causing multiple play / pause signals
        # this is a simple, but basic method
        utime.sleep(0.1)
    if (button_reset.value() == False):
        print ("Reset")
        timer = 0
        lcd.clear()
        lcd.putstr("Stopwatch")
        utime.sleep(0.1)
    pom = str(math.floor(timer))
    # while (len(pom) < 16):
    #    pom = " " + pom
    lcd.move_to(16 - len(pom) ,1)
    lcd.putstr(pom)
    if (running):
        timer += 1
        utime.sleep(1)