//#define BLYNK_TEMPLATE_ID
//#define BLYNK_DEVICE_NAME "HOME Automation" // name we are given to project
//#define BLYNK_AUTH_TOKEN // it is comes to you for registered email id..and we need to link with the project

#define BLYNK_TEMPLATE_ID "TMPL3JPrMR486"
#define BLYNK_TEMPLATE_NAME "Home Automation"
#define BLYNK_AUTH_TOKEN "VqkbWzeWaim-t8lzj3UTZQuiPrDHtf_j"
#define BLYNK_PRINT Serial // print in serial manner

#include<WiFi.h>// here we added the library
#include<WiFiClient.h>// when we join into the company we need to add the clent also that whom given this project to us.
#include<BlynkSimpleEsp32.h>// adding esp32 library..

char auth[] = BLYNK_AUTH_TOKEN;

char ssid[] = "Wokwi-GUEST";// here we are creating wifi name and password..to the wifi and esp32 doesn't have directly wifi connection, we need to provide..
char pass[] = " ";

BlynkTimer timer;

#define button1_pin 26 // here we defining the push buttons
#define button2_pin 25
#define button3_pin 33
#define button4_pin 32


#define relay1_pin 13 // here we are defining the relay modules....
#define relay2_pin 12
#define relay3_pin 14
#define relay4_pin 27

int relay1_state = 0;// here we are making the state of every realy as zero because we need to start the relay from the first/start/initial stage..
int relay2_state = 0;
int relay3_state = 0;
int relay4_state = 0;

#define button1_vpin   V1 // when ever we are creating a project with blynk we need to create the virtual pins...and it make sense when we started the application.. 
#define button2_vpin   V2
#define button3_vpin   V3
#define button4_vpin   V4

BLYNK_CONNECTED(){ // here we connecting ..
  Blynk.syncVirtual(button1_vpin);// here we are sync with the butttons
  Blynk.syncVirtual(button2_vpin);
  Blynk.syncVirtual(button3_vpin);
  Blynk.syncVirtual(button4_vpin);

}

BLYNK_WRITE(button1_vpin){ // here we making sync betw the virtual pins with relay..
  relay1_state = param.asInt();// here we got to know the exact state of relay either is on off or on.
  digitalWrite(relay1_pin, relay1_state);

}

BLYNK_WRITE(button2_vpin){
  relay2_state = param.asInt();// why we are write as int means we already defined with int in the lines...
  digitalWrite(relay2_pin, relay2_state);

}


BLYNK_WRITE(button3_vpin){
  relay3_state = param.asInt();
  digitalWrite(relay3_pin, relay3_state);

}

BLYNK_WRITE(button4_vpin){
  relay4_state = param.asInt();
  digitalWrite(relay4_pin, relay4_state);

}

void setup(){
  Serial.begin(115200);
  pinMode(button1_pin, INPUT_PULLUP);
  pinMode(button2_pin, INPUT_PULLUP);
  pinMode(button3_pin, INPUT_PULLUP);
  pinMode(button4_pin, INPUT_PULLUP);

  pinMode(relay1_pin, OUTPUT);
  pinMode(relay2_pin, OUTPUT);
  pinMode(relay3_pin, OUTPUT);
  pinMode(relay4_pin, OUTPUT);

  digitalWrite(relay1_pin, HIGH);
  digitalWrite(relay2_pin, HIGH);
  digitalWrite(relay3_pin, HIGH);
  digitalWrite(relay4_pin, HIGH);

  Blynk.begin(auth, ssid, pass); //here we starting the blynk ..
}

void loop(){
  Blynk.run();// while writing/taking the functions we can not use the semicolon we need to use colon...
  timer.run();
  listen_push_button();

}

void listen_push_button(){
  if (digitalRead(button1_pin) == LOW){
    delay(200);
    control_relay(1);
    Blynk.virtualWrite(button1_vpin, relay1_state);// it gives the confirmation that it is in off or on state..
    
  }
  else if(digitalRead(button2_pin) == LOW){
    delay(200);
    control_relay(2);
    Blynk.virtualWrite(button2_vpin, relay2_state);

  }else if(digitalRead(button3_pin) == LOW){
    delay(200);
    control_relay(3);
    Blynk.virtualWrite(button3_vpin, relay3_state);
  }else if(digitalRead(button4_pin) == LOW){
    delay(200);
    control_relay(4);
    Blynk.virtualWrite(button4_vpin, relay4_state);
  }
}

void control_relay(int relay){
  if(relay == 1){   // if the condition true then it's on otherwise it wonn't be on.. 
    relay1_state = !relay1_state;
    digitalWrite(relay1_pin, relay1_state);
    Serial.print("Relay1 state =  ");
    Serial.println(relay1_state);
    delay(50);
  }
  else if (relay  == 2){
          relay2_state = !relay2_state;
          digitalWrite(relay2_pin, relay2_state);
          Serial.print("Relay2 state =  ");
          Serial.println(relay2_state);
          delay(50);

  }
  else if (relay  == 3){
          relay3_state = !relay3_state;
          digitalWrite(relay3_pin, relay3_state);
          Serial.print("Relay3 state =  ");
          Serial.println(relay3_state);
          delay(50);
  }
  else if (relay  == 4){
          relay4_state = !relay4_state;
          digitalWrite(relay4_pin, relay4_state);
          Serial.print("Relay4 state =  ");
          Serial.println(relay4_state);
          delay(50);
  }

}