#############################################################################################
# Task 1 #2 :   Button (Wokwi/hardware) turn on/off LED in Blynk.
#               Switch (Blynk) turn on/off LED in Wokwi/hardware.
#############################################################################################

from machine import Pin
import time
import network
import BlynkLib

###   Button's pin (real & virtual), LED's pin (real & virtual), WiFi and Blynk credentials
b1_pin = 32
b1_vir = 4
led1_pin = 26
led1_vir = 1
b2_pin = 35
b2_vir = 5
led2_pin = 25
led2_vir = 2
b3_pin = 34
b3_vir = 6
led3_pin = 33
led3_vir = 3
SSID = 'Wokwi-GUEST'
PASS = ''
TOKEN = 'E_4lvXx6QMQBXIxVmOzphQ5CQzcaYqfr'

###   Connect to WiFi
wifi = network.WLAN(network.STA_IF)
if not wifi.isconnected():
    print("Connecting to {}...".format(SSID))
    wifi.active(True)
    wifi.connect(SSID, PASS)
    while not wifi.isconnected():
        pass

print('Connected! IP:', wifi.ifconfig()[0])

###   Initialize button, LED and Blynk
led1 = Pin(led1_pin, Pin.OUT)
b1 = Pin(b1_pin, Pin.IN, Pin.PULL_UP)
led2 = Pin(led2_pin, Pin.OUT)
b2 = Pin(b2_pin, Pin.IN, Pin.PULL_UP)
led3 = Pin(led3_pin, Pin.OUT)
b3 = Pin(b3_pin, Pin.IN, Pin.PULL_UP)
blynk = BlynkLib.Blynk(TOKEN, insecure=True)

@blynk.on("connected")
def blynk_connected(ping):
    print('Blynk ready. Ping:', ping, 'ms')
    blynk.virtual_write(b1_vir, prev_b1) # init Button/Label in Blynk
    blynk.virtual_write(b2_vir, prev_b2)
    blynk.virtual_write(b3_vir, prev_b3)

@blynk.on("disconnected")
def blynk_disconnected():
    print('Blynk disconnected')

@blynk.on("V4")               # Handler to process received data from V1
def v4_write_handler(value):
    state1 = int(value[0])  # convert value to integer
    if state1 == 1:
        led1.value(1)       # Update LED
    else:
        led1.value(0)

def v5_write_handler(value):
    state2 = int(value[0])  # convert value to integer
    if state2 == 1:
        led2.value(1)       # Update LED
    else:
        led2.value(0)

def v6_write_handler(value):
    state3 = int(value[0])  # convert value to integer
    if state3 == 1:
        led3.value(1)       # Update LED
    else:
        led3.value(0)

###   get initial button's values
prev_b1 = b1.value()
prev_b2 = b2.value()
prev_b3 = b3.value()

while True:
    blynk.run()
    curr_b1 = b1.value()         # get latest switch state
    curr_b2 = b2.value() 
    curr_b3 = b3.value() 
    if curr_b1 == 0:            # switch is pressed
        led1_val = 1            # value to turn on LED
    if curr_b2 == 0:
        led2_val = 1
    if curr_b3 == 0:
        led3_val = 1
    else:                      # switch is released
        led1_val = 0            # value to turn off LED
        led2_val = 0  
        led3_val = 0  
    #led.value(led_val)
    if curr_b1 != prev_b1:       # if switch state changes
        prev_b1 = curr_b1
        blynk.virtual_write(led1_vir, led1_val) # update LED in Blynk
    if curr_b2 != prev_b2:
        prev_b2 = curr_b2
        blynk.virtual_write(led2_vir, led2_val)
    if curr_b3 != prev_b3:
        prev_b3 = curr_b3
        blynk.virtual_write(led3_vir, led3_val)