// button pin
int button_pin = 5;
const int LDR_PIN = A0;
// 7 segment pins
int a_pin = 8;
int b_pin = 9;
int c_pin = 11;
int d_pin = 12;
int e_pin = 13;
int f_pin = 7;
int g_pin = 6;
int dp_pin = 10;

int pot1 ;
// RGB pins
int rgb_red_pin = 4;
int rgb_green_pin = 2;

// led pin
int led_pin = 3;

// potentiometer pin
int pot_pin = A1;

// system variables
int button_state, button_old_state;
int counter = 0;
int pot_value;

void setup() {
  // button mode
  pinMode(button_pin, INPUT_PULLUP);
 

  // 7 segment modes
  pinMode(a_pin, OUTPUT);
  pinMode(b_pin, OUTPUT);
  pinMode(c_pin, OUTPUT);
  pinMode(d_pin, OUTPUT);
  pinMode(e_pin, OUTPUT);
  pinMode(f_pin, OUTPUT);
  pinMode(g_pin, OUTPUT);
  pinMode(dp_pin, OUTPUT);

  // RGB mode
  pinMode(rgb_red_pin, OUTPUT);
  pinMode(rgb_green_pin, OUTPUT);

  // led mode
  pinMode(led_pin, OUTPUT);

  // potentiometer mode
  // pinMode(pot_pin, INPUT);

  Serial.begin(9600);
}

void loop() {
   int ldr_value = analogRead(LDR_PIN);
  Serial.print("LDR value: ");
  Serial.println(ldr_value);
  delay(10); // wait for 1 second before reading again
 
  readButton();

  if(counter%2 == 1 && ldr_value>=511) {
    digitalWrite(rgb_red_pin, LOW);
    digitalWrite(rgb_green_pin, HIGH);

    pot_value = analogRead(pot_pin);
     pot1 =pot_value/113;
    Serial.println(pot_value);
    analogWrite(led_pin, pot_value/4);
  }
  else
  {
    digitalWrite(rgb_red_pin, HIGH);
    digitalWrite(rgb_green_pin, LOW);

    analogWrite(led_pin, 0);
  }

  if(counter == 0) {
    zero();
  } else if(counter == 1) {
    one();
  } else if(counter == 2) {
    two();
  } else if(counter == 3) {
    three();
  } else if(counter == 4) {
    four();
  } else if(counter == 5) {
    five();
  } else if(counter == 6) {
    six();
  } else if(counter == 7) {
    seven();
  } else if(counter == 8) {
    eight();
  } else if(counter== 9) {
    nine();
  }
}

void readButton() {
  button_state = !digitalRead(button_pin);

  if(button_state == 1 && button_old_state == 0) {
    counter++;
    if(counter == 10)
    {
      counter = 0;
    }
  }
  else
  {
    delay(50);
  }

  button_old_state = button_state;
}

void clear() {
  digitalWrite(a_pin, LOW); 
  digitalWrite(b_pin, LOW); 
  digitalWrite(c_pin, LOW); 
  digitalWrite(d_pin, LOW); 
  digitalWrite(e_pin, LOW); 
  digitalWrite(f_pin, LOW); 
  digitalWrite(g_pin, LOW); 
}

void zero() {
  digitalWrite(a_pin, 1); 
  digitalWrite(b_pin, 1); 
  digitalWrite(c_pin, 1); 
  digitalWrite(d_pin, 1); 
  digitalWrite(e_pin, 1); 
  digitalWrite(f_pin, 1); 
  digitalWrite(g_pin, 0); 
}

void one() {
  digitalWrite(a_pin, 0); 
  digitalWrite(b_pin, 1); 
  digitalWrite(c_pin, 1); 
  digitalWrite(d_pin, 0); 
  digitalWrite(e_pin, 0); 
  digitalWrite(f_pin, 0); 
  digitalWrite(g_pin, 0); 
}

void two() {
  digitalWrite(a_pin, 1); 
  digitalWrite(b_pin, 1); 
  digitalWrite(c_pin, 0); 
  digitalWrite(d_pin, 1); 
  digitalWrite(e_pin, 1); 
  digitalWrite(f_pin, 0); 
  digitalWrite(g_pin, 1); 
}

void three() {
  digitalWrite(a_pin, 1); 
  digitalWrite(b_pin, 1); 
  digitalWrite(c_pin, 1); 
  digitalWrite(d_pin, 1); 
  digitalWrite(e_pin, 0); 
  digitalWrite(f_pin, 0); 
  digitalWrite(g_pin, 1); 
}

void four() {
  digitalWrite(a_pin, 0); 
  digitalWrite(b_pin, 1); 
  digitalWrite(c_pin, 1); 
  digitalWrite(d_pin, 0); 
  digitalWrite(e_pin, 0); 
  digitalWrite(f_pin, 1); 
  digitalWrite(g_pin, 1); 
}

void five() {
  digitalWrite(a_pin, 1); 
  digitalWrite(b_pin, 0); 
  digitalWrite(c_pin, 1); 
  digitalWrite(d_pin, 1); 
  digitalWrite(e_pin, 0); 
  digitalWrite(f_pin, 1); 
  digitalWrite(g_pin, 1); 
}

void six() {
  digitalWrite(a_pin, 1); 
  digitalWrite(b_pin, 0); 
  digitalWrite(c_pin, 1); 
  digitalWrite(d_pin, 1); 
  digitalWrite(e_pin, 1); 
  digitalWrite(f_pin, 1); 
  digitalWrite(g_pin, 1); 
}

void seven() {
  digitalWrite(a_pin, 1); 
  digitalWrite(b_pin, 1); 
  digitalWrite(c_pin, 1); 
  digitalWrite(d_pin, 0); 
  digitalWrite(e_pin, 0); 
  digitalWrite(f_pin, 0); 
  digitalWrite(g_pin, 0); 
}

void eight() {
  digitalWrite(a_pin, 1); 
  digitalWrite(b_pin, 1); 
  digitalWrite(c_pin, 1); 
  digitalWrite(d_pin, 1); 
  digitalWrite(e_pin, 1); 
  digitalWrite(f_pin, 1); 
  digitalWrite(g_pin, 1); 
}

void nine() {
  digitalWrite(a_pin, 1); 
  digitalWrite(b_pin, 1); 
  digitalWrite(c_pin, 1); 
  digitalWrite(d_pin, 1); 
  digitalWrite(e_pin, 0); 
  digitalWrite(f_pin, 1); 
  digitalWrite(g_pin, 1); 
}