const int REDPIN_FIRSTDIRECTION = 13;
const int YELLOWPIN_FIRSTDIRECTION = 12;
const int GREENPIN_FIRSTDIRECTION = 11;
const int REDPIN_SECONDDIRECTION = 10;
const int YELLOWPIN_SECONDDIRECTION = 9;
const int GREENPIN_SECONDDIRECTION = 8;
const int BUTTONPIN_FIRSTDIRECTION = 5;
const int BUTTONPIN_SECONDDIRECTION = 4;

const int NORMAL = 10;
const int GREEN_NORMAL = 15000;

int count_first=0;
int count_second=0;
int count_first_previous=0;
int count_second_previous=0;
int red_time = GREEN_NORMAL;
int green_time = GREEN_NORMAL;
int yellow_time = 3000;

int green_time_previous=green_time;
int red_time_previous=red_time;

unsigned long previous_second = 0;
bool currentButtonState;

bool buttonPressed = false;

void setup() {
  pinMode(BUTTONPIN_FIRSTDIRECTION, INPUT_PULLUP);
  pinMode(REDPIN_FIRSTDIRECTION, OUTPUT);
  pinMode(YELLOWPIN_FIRSTDIRECTION, OUTPUT);
  pinMode(GREENPIN_FIRSTDIRECTION, OUTPUT);
  pinMode(BUTTONPIN_SECONDDIRECTION, INPUT_PULLUP);
  pinMode(REDPIN_SECONDDIRECTION, OUTPUT);
  pinMode(YELLOWPIN_SECONDDIRECTION, OUTPUT);
  pinMode(GREENPIN_SECONDDIRECTION, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  green_time_previous = green_time;
  red_time_previous = red_time;
 if(abs(count_first-count_second)>5&&count_first-NORMAL>5&&count_first-count_second>5) 
 {
  if(count_first-count_second<10&&green_time_previous-red_time_previous>=1800){
    green_time=green_time_previous-3000; red_time=red_time_previous+3000;
  }
  else{
    green_time=green_time_previous+3000; red_time=red_time_previous-3000;
  }
 }
 else if(abs(count_first-count_second)>5&&count_second-NORMAL>5&&count_second-count_first>5) 
 {
  if(count_second-count_first<10&&red_time_previous-green_time_previous>=18000){
    green_time=green_time_previous+3000; red_time=red_time_previous-3000;
  }
  else{
    red_time=red_time_previous+3000; green_time=green_time_previous-3000;
  }  
 }
 else 
 {
  if(red_time_previous>green_time_previous){
    red_time=red_time_previous-3000; green_time=green_time_previous+3000;
  }
  else if(green_time_previous>red_time_previous){
    red_time=red_time_previous+3000; green_time=green_time_previous-3000;
  }
 }
 if(green_time <= 3000) {green_time = 6000; red_time = 24000;}
 if(red_time <= 3000) {red_time = 6000; green_time = 24000;}

 Serial.print("green: ");
 Serial.println(green_time);
 Serial.print("red: ");
 Serial.println(red_time);
 Serial.print("first: ");
 Serial.println(count_first);
 Serial.print("second: ");
 Serial.println(count_second);
  count_first_previous=count_first;
  count_second_previous=count_second;
  count_first=0;
  count_second=0;

  blink(REDPIN_FIRSTDIRECTION, GREENPIN_SECONDDIRECTION, red_time);
  blink(YELLOWPIN_FIRSTDIRECTION, YELLOWPIN_SECONDDIRECTION, yellow_time);
  blink(GREENPIN_FIRSTDIRECTION, REDPIN_SECONDDIRECTION, green_time);
  blink(YELLOWPIN_FIRSTDIRECTION, YELLOWPIN_SECONDDIRECTION, yellow_time);
}

void blink(int pin_first, int pin_second, int time)
{
  digitalWrite(pin_first, HIGH);
  digitalWrite(pin_second, HIGH);
  long start = millis();
  long lastButtonPress;

  while(millis() - start < time)
  {
    unsigned long remaining_time = (time - (millis() - start)) / 1000;

    if (pin_first == GREENPIN_FIRSTDIRECTION)
    {
      if (!digitalRead(BUTTONPIN_FIRSTDIRECTION)&&millis()-lastButtonPress>250)
      {
        lastButtonPress=millis();
        count_first = count_first + 1;
        Serial.print("1: ");
        Serial.println(count_first);
      }
      writeRemainingTime(remaining_time);
    }

    if (pin_second == GREENPIN_SECONDDIRECTION)
    {
      if (!digitalRead(BUTTONPIN_SECONDDIRECTION)&&millis()-lastButtonPress>250)
      {
        lastButtonPress=millis();
        count_second = count_second + 1;
        Serial.print("2: ");
        Serial.println(count_second);
      }
      writeRemainingTime(remaining_time);
    }
  }
  digitalWrite(pin_first, LOW);
  digitalWrite(pin_second, LOW);
}

void writeRemainingTime(unsigned long remaining_time){
  unsigned long current_second = remaining_time % 60;
  if (current_second != previous_second)
  {
    Serial.print("Время до следующего сигнала: ");
    Serial.println(remaining_time);
    previous_second = current_second;
  }
}