#define BLYNK_TEMPLATE_ID "TMPL3AHdxt8qe"
#define BLYNK_TEMPLATE_NAME "smart traffic management"
#define BLYNK_AUTH_TOKEN "tuzIATIOLV_O3I1l5KMpW7oxtojbbuyn"
#define BLYNK_PRINT Serial
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

// Your WiFi credentials
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// Define the GPIO pins for each traffic light
#define NORTH_RED_PIN 0
#define NORTH_YELLOW_PIN 1
#define NORTH_GREEN_PIN 2
#define SOUTH_RED_PIN 3
#define SOUTH_YELLOW_PIN 4
#define SOUTH_GREEN_PIN 5
#define WEST_RED_PIN 6
#define WEST_YELLOW_PIN 7
#define WEST_GREEN_PIN 8
#define EAST_RED_PIN 9
#define EAST_YELLOW_PIN 10
#define EAST_GREEN_PIN 11

bool trafficLightsOn = false;

// Function to control traffic lights
void controlTrafficLights() {
  if (trafficLightsOn) {
    // Set all lights to red
    digitalWrite(NORTH_RED_PIN, HIGH);
    digitalWrite(NORTH_YELLOW_PIN, LOW);
    digitalWrite(NORTH_GREEN_PIN, LOW);

    digitalWrite(SOUTH_RED_PIN, HIGH);
    digitalWrite(SOUTH_YELLOW_PIN, LOW);
    digitalWrite(SOUTH_GREEN_PIN, LOW);

    digitalWrite(WEST_RED_PIN, HIGH);
    digitalWrite(WEST_YELLOW_PIN, LOW);
    digitalWrite(WEST_GREEN_PIN, LOW);

    digitalWrite(EAST_RED_PIN, HIGH);
    digitalWrite(EAST_YELLOW_PIN, LOW);
    digitalWrite(EAST_GREEN_PIN, LOW);

    // Simulate traffic light control logic here
    delay(5000); // example delay, change as needed

    // Example of changing lights
    digitalWrite(NORTH_RED_PIN, LOW);
    digitalWrite(NORTH_GREEN_PIN, HIGH);
    delay(5000);
    digitalWrite(NORTH_GREEN_PIN, LOW);
    digitalWrite(NORTH_YELLOW_PIN, HIGH);
    delay(2000);
    digitalWrite(NORTH_YELLOW_PIN, LOW);
    digitalWrite(NORTH_RED_PIN, HIGH);

    // Add other light control logic as needed
  } else {
    // Turn off all lights
    digitalWrite(NORTH_RED_PIN, LOW);
    digitalWrite(NORTH_YELLOW_PIN, LOW);
    digitalWrite(NORTH_GREEN_PIN, LOW);
    digitalWrite(SOUTH_RED_PIN, LOW);
    digitalWrite(SOUTH_YELLOW_PIN, LOW);
    digitalWrite(SOUTH_GREEN_PIN, LOW);
    digitalWrite(WEST_RED_PIN, LOW);
    digitalWrite(WEST_YELLOW_PIN, LOW);
    digitalWrite(WEST_GREEN_PIN, LOW);
    digitalWrite(EAST_RED_PIN, LOW);
    digitalWrite(EAST_YELLOW_PIN, LOW);
    digitalWrite(EAST_GREEN_PIN, LOW);
  }
}

// This function will be called every time the button widget changes state
BLYNK_WRITE(V0) {
  int pinValue = param.asInt(); // Get the value from the virtual pin
  trafficLightsOn = (pinValue == 1);
}

void setup() {
  // Initialize serial communication
  Serial.begin(115200);
  
  // Initialize Blynk
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
  
  // Initialize GPIO pins
  pinMode(NORTH_RED_PIN, OUTPUT);
  pinMode(NORTH_YELLOW_PIN, OUTPUT);
  pinMode(NORTH_GREEN_PIN, OUTPUT);
  pinMode(SOUTH_RED_PIN, OUTPUT);
  pinMode(SOUTH_YELLOW_PIN, OUTPUT);
  pinMode(SOUTH_GREEN_PIN, OUTPUT);
  pinMode(WEST_RED_PIN, OUTPUT);
  pinMode(WEST_YELLOW_PIN, OUTPUT);
  pinMode(WEST_GREEN_PIN, OUTPUT);
  pinMode(EAST_RED_PIN, OUTPUT);
  pinMode(EAST_YELLOW_PIN, OUTPUT);
  pinMode(EAST_GREEN_PIN, OUTPUT);
}

void loop() {
  // Run Blynk
  Blynk.run();
  
  // Control traffic lights
  controlTrafficLights();
}