from machine import Pin, SPI,Timer
import max7219
import gc
from utime import sleep
spi = SPI(0, 10_000_000, sck=Pin(2), mosi=Pin(3), miso=Pin(4))
screen = max7219.Max7219(32, 8, spi, Pin(5))
btn_start=Pin(13,Pin.IN,Pin.PULL_UP)
coin_sig=Pin(14,Pin.IN,Pin.PULL_UP)
second=0
minutes=20
hour=0
counter = 0  # Initialize the button press count
debounce_timer = None
run=0
coin=0
update=True
sec_timer = Timer()

def disp_text(s):        
        length = len(s)    
        column = (length * 8) #Calculate number of columns of the message
        if length<=4:
            screen.fill(0)   
            screen.text(s,0,0,1)            
            screen.how()          
        else:
            for i in range(8,-column+32,-1):
                screen.fill(0)   
                screen.text(s,i,0,1)            
                screen.show()  
                if coin>0:
                    break        
                sleep(0.03) 

def start_pressed(pin):
    global update,run,counter, debounce_timer  # Declare variables as global
    if debounce_timer is None:
        run=not run
        update=False           
        # Start a timer for debounce period (e.g., 200 milliseconds)
        debounce_timer = Timer()
        debounce_timer.init(mode=Timer.ONE_SHOT, period=200, callback=debounce_callback)

def coin_pulse(pin):
    global coin,counter, debounce_timer  # Declare variables as global
    if debounce_timer is None:         
        coin+=1 
        # Start a timer for debounce period (e.g., 200 milliseconds)
        debounce_timer = Timer()
        debounce_timer.init(mode=Timer.ONE_SHOT, period=200, callback=debounce_callback)

def debounce_callback(timer):
    global debounce_timer
    debounce_timer = None

def update_sec(timer):
    global coin    
    if coin<=1:
        sec_timer.deinit()
        print("count down stop")
    coin-=1

# Attach the interrupt to the button's rising edge
btn_start.irq(trigger=Pin.IRQ_FALLING, handler=start_pressed)
coin_sig.irq(trigger=Pin.IRQ_FALLING, handler=coin_pulse)
sleep(0.1)
print(machine.freq())
#screen.scroll_text("welcome to mesin beras",0.05)
while 1:
    if update is False:
        if run is True and coin>0 :            
            sec_timer.init(mode=Timer.PERIODIC, period=1000, callback=update_sec)
            update=True
            run=False
            print("cound down start")
        else:
            sec_timer.deinit()
            print("count down pause")
            update=True
    if coin>0:
        screen.disp_text(str(coin)+"s") 
    else:
        disp_text("selamat datang") 
        sleep(0.3)
        disp_text("sila masukkan token")  
    sleep(0.5)