// Include necessary libraries
#include <NewPing.h>

// Define sensor pins
#define IR_SENSOR_1 2
#define IR_SENSOR_2 3
#define TRIGGER_PIN_1 4
#define ECHO_PIN_1 5
#define TRIGGER_PIN_2 6
#define ECHO_PIN_2 7
#define LDR_PIN A0

// Define LED pins
#define RED_LED 8
#define YELLOW_LED 9
#define GREEN_LED 10

// Define constants
#define MAX_DISTANCE 200  // Maximum distance for ultrasonic sensor

// Create NewPing objects for ultrasonic sensors
NewPing sonar1(TRIGGER_PIN_1, ECHO_PIN_1, MAX_DISTANCE);
NewPing sonar2(TRIGGER_PIN_2, ECHO_PIN_2, MAX_DISTANCE);

void setup() {
  // Initialize serial communication
  Serial.begin(9600);

  // Set sensor pins as input
  pinMode(IR_SENSOR_1, INPUT);
  pinMode(IR_SENSOR_2, INPUT);

  // Set LED pins as output
  pinMode(RED_LED, OUTPUT);
  pinMode(YELLOW_LED, OUTPUT);
  pinMode(GREEN_LED, OUTPUT);
}

void loop() {
  // Read sensor values
  int irSensor1State = digitalRead(IR_SENSOR_1);
  int irSensor2State = digitalRead(IR_SENSOR_2);
  unsigned int distance1 = sonar1.ping_cm();
  unsigned int distance2 = sonar2.ping_cm();
  int ldrValue = analogRead(LDR_PIN);

  // Print sensor values for debugging
  Serial.print("IR Sensor 1: "); Serial.println(irSensor1State);
  Serial.print("IR Sensor 2: "); Serial.println(irSensor2State);
  Serial.print("Distance 1: "); Serial.println(distance1);
  Serial.print("Distance 2: "); Serial.println(distance2);
  Serial.print("LDR Value: "); Serial.println(ldrValue);

  // Decision-making logic for traffic light control
  if (irSensor1State == HIGH || distance1 < 50) {
    // Vehicle detected by IR sensor 1 or ultrasonic sensor 1
    digitalWrite(GREEN_LED, HIGH);
    digitalWrite(RED_LED, LOW);
    delay(5000);  // Green light for 5 seconds
  } else if (irSensor2State == HIGH || distance2 < 50) {
    // Vehicle detected by IR sensor 2 or ultrasonic sensor 2
    digitalWrite(GREEN_LED, LOW);
    digitalWrite(RED_LED, HIGH);
    delay(5000);  // Red light for 5 seconds
  } else {
    // No vehicle detected
    digitalWrite(GREEN_LED, LOW);
    digitalWrite(RED_LED, LOW);
    digitalWrite(YELLOW_LED, HIGH);
    delay(2000);  // Yellow light for 2 seconds
    digitalWrite(YELLOW_LED, LOW);
  }

  // Adjust LED brightness based on LDR value
  int brightness = map(ldrValue, 0, 1023, 0, 255);
  analogWrite(GREEN_LED, brightness);
  analogWrite(YELLOW_LED, brightness);
  analogWrite(RED_LED, brightness);

  // Short delay before the next loop iteration
  delay(500);
}