#include <Adafruit_NeoPixel.h>

#define DIN_PIN_1 4
#define NUM_PIXELS_1 4
#define DIN_PIN_2 5
#define NUM_PIXELS_2 4
#define DIN_PIN_3 6
#define NUM_PIXELS_3 4

Adafruit_NeoPixel pixels_1(NUM_PIXELS_1, DIN_PIN_1);
Adafruit_NeoPixel pixels_2(NUM_PIXELS_2, DIN_PIN_2);
Adafruit_NeoPixel pixels_3(NUM_PIXELS_3, DIN_PIN_3);

int32_t colors[] = {
  pixels_1.Color(255, 0, 0),    // Red
  pixels_1.Color(255, 255, 0),  // Yellow
  pixels_1.Color(0, 255, 0),    // Green
  pixels_1.Color(0,0,0), //Black
  pixels_2.Color(255, 255, 0),  // Yellow
};


struct colore { // definizione della struttura dell'array colore
    char messaggio[50];
    int led_colore;
};

struct colore Colori[4] = { // Dichiarazione e inizializzazione diretta dell'array di colore
        {"Semaforo Verde", 0},
        {"Semaforo Giallo", 1},
        {"Semaforo Rosso", 2},
        {"Semaforo spento", 3}
    };



unsigned long startMillis;         // Store start time
unsigned long millisCorrente;      // Store current time
const unsigned long periodo_verde = 5000;  // Green color period (5 second)
const unsigned long periodo_giallo = 1000; // Yellow period (1 second)
const unsigned long periodo_rosso = 5000; // Red period (5 second)
int stato_led = (Colori[0].led_colore);  // State to control which color to display

void setup() {
  Serial.begin(9600);  // Start serial communication
  pixels_1.begin();      // Initialize NeoPixel strip
  startMillis = millis();  // Store the start time
  
}

void loop() {
  millisCorrente = millis();  // Get current time

  // Handle the logic for the different LED states
  if (stato_led == (Colori[0].led_colore)) {
   

      // Green
    pixels_1.fill(colors[2]);  // Set first pixel to green
    pixels_1.show();  // Update the LEDs
    pixels_2.fill(colors[1]);  // Set first pixel to green
    pixels_2.show();  // Update the LEDs
     
      
    // Switch state after the green period
    if (millisCorrente - startMillis >= periodo_verde) {
    Serial.println(Colori[1].messaggio); 
      pixels_1.clear();  // Clear LED strip
      pixels_1.show();   // Update the LEDs
      stato_led = (Colori[1].led_colore);   // Change state to yellow
      startMillis = millis();  // Reset startMillis for the next timing cycle
    }
  }
  else if (stato_led == (Colori[1].led_colore)) {  // Green + Yellow (transition)
       pixels_1.fill(colors[1]);  // Set second pixel to yellow
    pixels_1.show();  // Update the LEDs
  
    // Switch back to green after the yellow period
    if (millisCorrente - startMillis >= periodo_giallo) {
      Serial.println((Colori[2].messaggio));
      pixels_1.clear();  // Clear LED strip
      pixels_1.show();   // Update the LEDs
      stato_led = 2;   // Change state to green
      startMillis = millis();  // Reset startMillis for the next cycle
    }
  }
  else if (stato_led == (Colori[2].led_colore)) {  // Green + Yellow (transition)
    pixels_1.setPixelColor(2, colors[0]);  // Set third pixel to red
    pixels_1.show();  // Update the LEDs
   
    // Switch back to green after the yellow period
    if (millisCorrente - startMillis >= periodo_rosso) {
      Serial.println((Colori[0].messaggio));
      pixels_1.clear();  // Clear LED strip
      pixels_1.show();   // Update the LEDs
      stato_led = (Colori[0].led_colore);   // Change state to green
      startMillis = millis();  // Reset startMillis for the next cycle
    }
  }
}