#Importing usefool libraries and tools that will help us in our task
from machine import Pin
from lcd import lcd_print , lcd_init 
from time import sleep
from keypad import Keypad

#Define demux
demux = Pin(19, Pin.OUT)
selector = Pin(18, Pin.OUT)
selector2 = Pin(5 , Pin.OUT)

# Define GPIO pins for rows
row_pins = [Pin(12), Pin(13), Pin(32), Pin(33)]

# Define GPIO pins for columns
column_pins = [Pin(25), Pin(26), Pin(27), Pin(14)]

# Define keypad layout
keys = [
    ['1', '2', '3', 'A'],
    ['4', '5', '6', 'B'],
    ['7', '8', '9', 'C'],
    ['*', '0', '#', 'D']
]

# Initialize keypad
keypad = Keypad(row_pins, column_pins, keys)
demux.value(0)
lcd_init()

while True :
    #selecting the device you want to control
    lcd_print("select appliance")
    key_pressed = None 
    while key_pressed not in ('1', '2', '3', '4'):
        key_pressed = keypad.read_keypad()
        sleep(0.02)

    if key_pressed == '1':
        selector.value(0)
        selector2.value(0)
        lcd_print("lighting selected")

    elif key_pressed == '2':
        selector.value(1)
        selector2.value(0)
        lcd_print("fan selected") 

    elif key_pressed == '3':
        selector.value(0)
        selector2.value(1)
        lcd_print("door selected")

    elif key_pressed == '4':
        selector.value(1)
        selector2.value(1)
        lcd_print("alert selected")

    sleep(0.5)
    #Choosing the device state
    lcd_print("choose stat")

    key_pressed = None
    while key_pressed not in ('A', 'B', 'C'):
        key_pressed = keypad.read_keypad()
        sleep(0.02)

    if key_pressed == 'A':
        demux.value(1)
        lcd_print("stat: ON")

    elif key_pressed == 'B':
        demux.value(0)
        lcd_print("stat: OFF")

    elif key_pressed == 'C':
        demux.value(0)
        lcd_print("stat: RESET")
        
    sleep(0.5)
# --sleep() function is used to prevent bouncing--