#include <IRremote.h>

const uint16_t rec_pin = 27;

int button_pin[3] = {14,12,13};
int button_state[3] = {1,1,1};
int relay_pin[3] = {4,2,15};
int relay_state[3] ={};

bool buttonPress(int button_pin);
void checkButtons();
void updateRelay();

IRrecv receiver(rec_pin);
decode_results results;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  receiver.enableIRIn();
  Serial.println("Hello, ESP32!");
  for (int i=0; i<3; i++){
    pinMode(button_pin[i], INPUT_PULLUP); 
    pinMode(relay_pin[i], OUTPUT);
  }
}

void loop() {

}

bool buttonPress(int btn){
  int val = digitalRead(button_pin[btn]);
  if (val== LOW and button_state[btn] == 1){
    button_state[btn] = 0;
    Serial.print(btn);
    Serial.println(" button pressed");
    return true;
  }if(val == HIGH){
    button_state[btn] = 1;
  }
  return false;
}

void checkButtons(){
  for (int i=0; i<3; i++){
    if(buttonPress(i)){
      relay_state[i] = !(relay_state[i]); 
    }
  }
  return;
}

void updateRelay(){
  for (int i=0; i<3; i++){
    digitalWrite(relay_pin[i],relay_state[i]);
  }
  return;
}