#include <LiquidCrystal.h>

LiquidCrystal lcd(13, 12, 11, 10, 9, 8);
String cookie_count = "0";
int c_st = 0;
int up = 0;
int level = 0;
int level_str = "";
int upgrade_cur = 0;
String upgrade_cur_string = "0";
String current_screen = "";
int bad = 3;

void display_upgrades()
{
    Serial.begin(9600);
    current_screen = "upgrades";
    up = 1;
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Upgrades <");
    lcd.setCursor(0, 1);
    lcd.print("15c : Cursor <" + upgrade_cur_string +"> ");
}

void update_cookies(){
  delay(300);
  up = 0;
  current_screen = "cookie";
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Cookie Clicker <STATS> " + cookie_count);
    lcd.setCursor(0, 1);
    lcd.print("Cookies > " + cookie_count);
}

void setup() {
  pinMode(6, INPUT_PULLUP);
  pinMode(3, INPUT_PULLUP);
  pinMode(5, INPUT_PULLUP);
  lcd.begin(16, 2);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Loading...");
  delay(300);

  lcd.clear();
}

void loop() {

  if (current_screen == "cookie"){
    delay(100);
    c_st = c_st + level;
    cookie_count = c_st;
    update_cookies();
    Serial.print("<VAR> Cookie_count <l3> " + cookie_count);
   }


   if (digitalRead(6) == LOW) {
    delay(300);
    c_st = c_st + 1 + level / bad;
    cookie_count = c_st;
    update_cookies();
  }

  if (digitalRead(3) == LOW) {
    display_upgrades();
  }

  if (digitalRead(5) == LOW && current_screen == "upgrades" && c_st>15){
    delay(300);
    c_st = c_st - 15;
    level = level + 1;
    level_str = level;
    Serial.print(level_str);
    upgrade_cur++;
    upgrade_cur_string = upgrade_cur;
    display_upgrades();
  }


}