from machine import Pin
from time import sleep, ticks_ms

rij = [19, 18, 5 , 23]
kol = [16, 4, 2 , 15]

rij_pin_obj = []
kol_pin_obj = []

toetsen = [["1","2","3","A"],["4","5","6","B"],["7","8","9","C"],["*","0","#","D"]]

gewenste_code = "7ADC"
ingegeven_code = ""
alarm_status = 0

for pin in rij:
    obj = Pin(pin, Pin.IN)
    rij_pin_obj.append(obj)
    # obj.value(1)
    

for pin in kol:
    obj = Pin(pin, Pin.IN, Pin.PULL_UP)
    kol_pin_obj.append(obj)


print(rij_pin_obj)
print(kol_pin_obj)

vorige_toets = ""
ingegeven_code = ""

print("Alarm opgestart, geef je code om aan/uit te toggelen")

def scan_keyboard():
    global vorige_toets, ingegeven_code, alarm_status
    is_toets_ingedrukt = False

    for obj in rij_pin_obj:
        obj.init(mode=Pin.OUT)
        obj.value(0)

        for obj_k in kol_pin_obj:
            if obj_k.value() == 0:
                is_toets_ingedrukt = True
                index_k = kol_pin_obj.index(obj_k)
                index_r = rij_pin_obj.index(obj)
                #print("r=", index_r ,"k=",index_k)
                toets = toetsen [index_r][index_k]
                if toets != vorige_toets:

                    vorige_toets = toets
                    print( toets , "werd ingedrukt")

                    ingegeven_code += toets
                    #print("ingegeven_code=", ingegeven_code)

                    if len(ingegeven_code) > 4:
                        ingegeven_code = ingegeven_code [1:]
                        #print("ingegeven_code nu=", ingegeven_code)

                    print("ingegeven_code nu=", ingegeven_code)

                    if ingegeven_code == gewenste_code:
                        print("Juiste code ingegeven!")
                        alarm_status = not alarm_status
                        print("alarm switched to", alarm_status)


        obj.init(mode=Pin.IN)

    if not is_toets_ingedrukt:
        vorige_toets = ""

    return ingegeven_code

while True:
    scan_keyboard()