// Define pins for sensors and relay
const int LDRPin = 2;    // Digital pin connected to the LDR module
const int PIRPin1 = 3;    // Digital pin connected to the first PIR sensor
const int PIRPin2 = 5;    // Digital pin connected to the second PIR sensor
const int PIRPin3 = 6;    // Digital pin connected to the third PIR sensor
const int PIRPin4 = 12;    // Digital pin connected to the fourth PIR sensor
const int PIRPin5 = 10;    // Digital pin connected to the fifth PIR sensor
const int relayPin = 4;  // Digital pin connected to the relay that controls the light

// Time settings
unsigned long motionDetectedTime = 0;  // The last time motion was detected
unsigned long lightOnDuration = 5000; // Duration to keep the light on after detecting motion (in milliseconds)

void setup() {
  // Initialize serial communication for debugging
  Serial.begin(9600);
  
  // Set the sensor pins as inputs
  pinMode(LDRPin, INPUT);
  pinMode(PIRPin1, INPUT);
  pinMode(PIRPin2, INPUT);
  pinMode(PIRPin3, INPUT);
  pinMode(PIRPin4, INPUT);
  pinMode(PIRPin5, INPUT);
  
  // Set the relay pin as output
  pinMode(relayPin, OUTPUT);
  
  // Initially turn off the light
  digitalWrite(relayPin, LOW);
}

void loop() {
  // Read the state of the LDR (0 if dark, 1 if light)
  int LDRState = digitalRead(LDRPin);
  
  // Read the state of the PIR sensor (0 if no motion, 1 if motion detected)
  int PIRState1 = digitalRead(PIRPin1);
  int PIRState2 = digitalRead(PIRPin2);
  int PIRState3 = digitalRead(PIRPin3);
  int PIRState4 = digitalRead(PIRPin4);
  int PIRState5 = digitalRead(PIRPin5);
  
  // Print the states to the Serial Monitor for debugging
  Serial.print("LDR State: ");
  Serial.print(LDRState);
  Serial.print(", PIR1 State: ");
  Serial.println(PIRState1);
  Serial.print(", PIR2 State: ");
  Serial.println(PIRState2);
  Serial.print(", PIR3 State: ");
  Serial.println(PIRState3);
  Serial.print(", PIR4 State: ");
  Serial.println(PIRState4);
  Serial.print(", PIR5 State: ");
  Serial.println(PIRState5);
  
  // Check if it's dark
  if (LDRState == HIGH) {
    // If motion is detected by any PIR sensor, update the last motion detected time
    if (PIRState1 == HIGH || PIRState2 == HIGH  || PIRState3 == HIGH ||PIRState4 == HIGH || PIRState5 == HIGH) {
      motionDetectedTime = millis(); // Record the current time
      digitalWrite(relayPin, HIGH);  // Turn on the light
      Serial.println("Light ON - Motion detected");
    }

    // Keep the light on if motion was detected within the last 'lightOnDuration'
    if (millis() - motionDetectedTime <= lightOnDuration) {
      digitalWrite(relayPin, HIGH);  // Keep the light on
    } else {
      digitalWrite(relayPin, LOW);   // Turn off the light if no motion was detected within the time period
      Serial.println("Light OFF - No recent motion");
    }
  }
  // If it's not dark, ensure the light stays off
  else {
    digitalWrite(relayPin, LOW);
    Serial.println("Light OFF - It's daytime");
  }
  
  // Short delay for stability
  delay(100);
}