#define RELAY1_PIN  12
#define RELAY2_PIN  13
#define RELAY3_PIN  14
#define RELAY4_PIN  27

#define BUTTON1_PIN  16
#define BUTTON2_PIN  17
#define BUTTON3_PIN  18
#define BUTTON4_PIN  19

#define PIR1_PIN  32
#define PIR2_PIN  33
#define PIR3_PIN  25
#define PIR4_PIN  26

bool relayState1 = false;
bool relayState2 = false;
bool relayState3 = false;
bool relayState4 = false;

bool lastButtonState1 = LOW;
bool lastButtonState2 = LOW;
bool lastButtonState3 = LOW;
bool lastButtonState4 = LOW;

void setup() {
  pinMode(RELAY1_PIN, OUTPUT);
  pinMode(RELAY2_PIN, OUTPUT);
  pinMode(RELAY3_PIN, OUTPUT);
  pinMode(RELAY4_PIN, OUTPUT);

  pinMode(BUTTON1_PIN, INPUT_PULLDOWN);
  pinMode(BUTTON2_PIN, INPUT_PULLDOWN);
  pinMode(BUTTON3_PIN, INPUT_PULLDOWN);
  pinMode(BUTTON4_PIN, INPUT_PULLDOWN);

  pinMode(PIR1_PIN, INPUT);
  pinMode(PIR2_PIN, INPUT);
  pinMode(PIR3_PIN, INPUT);
  pinMode(PIR4_PIN, INPUT);

  // Start with all relays off
  digitalWrite(RELAY1_PIN, LOW);
  digitalWrite(RELAY2_PIN, LOW);
  digitalWrite(RELAY3_PIN, LOW);
  digitalWrite(RELAY4_PIN, LOW);
}

void loop() {
  // Check push buttons
  handleButton(BUTTON1_PIN, RELAY1_PIN, relayState1, lastButtonState1);
  handleButton(BUTTON2_PIN, RELAY2_PIN, relayState2, lastButtonState2);
  handleButton(BUTTON3_PIN, RELAY3_PIN, relayState3, lastButtonState3);
  handleButton(BUTTON4_PIN, RELAY4_PIN, relayState4, lastButtonState4);

  // Check PIR sensors
  handlePIR(PIR1_PIN, RELAY1_PIN, relayState1);
  handlePIR(PIR2_PIN, RELAY2_PIN, relayState2);
  handlePIR(PIR3_PIN, RELAY3_PIN, relayState3);
  handlePIR(PIR4_PIN, RELAY4_PIN, relayState4);
}

void handleButton(int buttonPin, int relayPin, bool &relayState, bool &lastButtonState) {
  bool buttonState = digitalRead(buttonPin);

  // Toggle relay state on button press
  if (buttonState && !lastButtonState) {
    relayState = !relayState;
    digitalWrite(relayPin, relayState ? HIGH : LOW);
  }

  lastButtonState = buttonState;
}

void handlePIR(int pirPin, int relayPin, bool &relayState) {
  if (digitalRead(pirPin) == HIGH) {
    relayState = true;
    digitalWrite(relayPin, HIGH);
  } else if (!relayState) {
    // Only turn off the relay if it wasn't turned on by the button
    digitalWrite(relayPin, LOW);
  }
}