#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27, 16, 2);
int buttonPinStart = 12; 
int buttonPinRestart = 13; 
int lastButtonState[] = {0, 0}; 
int maxA = 100;
int minA = 1;
int sproba = 0;
int UserD = 0;
int RandomN;
byte simvol[8] = {
0b01000,
0b01000,
0b11100,
0b01000,
0b01010,
0b00010,
0b00111,
0b00010
};
void setup() {
  Serial.begin(9600); 
  lcd.init();
  lcd.backlight();
  lcd.clear();  
  pinMode(buttonPinStart, INPUT);
  pinMode(buttonPinRestart, INPUT);
  lcd.createChar(1, simvol);
  start();
}

void loop() {
  if (singleClickEvent(buttonPinStart, lastButtonState[0])) {
    lcd.clear();  
    RandomN = random(0, 100);
    Serial.print(RandomN);
    lcd.setCursor(0,0); 
    lcd.print("Sproba: ");
    lcd.print(sproba);
    lcd.setCursor(0,1);
    lcd.print(1);
    lcd.print(" < Point < ");
    lcd.print(100);
    Serial.println("Початок");
    while(UserD!=RandomN){
      if (singleClickEvent(buttonPinRestart, lastButtonState[1])) {
        restart();
      }
      if (Serial.find("n")) {
        UserD = Serial.parseInt();
        Serial.println(UserD);
        if(UserD==RandomN){
          lcd.clear();
          lcd.setCursor(4, 0);
          lcd.print("Win!!!");
          break;
          sproba++;
        }
        else{
          sproba++; 
        lcd.clear();  
        lcd.setCursor(0,0); 
        lcd.print("Sproba: ");
        lcd.print(sproba);
        lcd.setCursor(0,1);
        if((UserD<minA && UserD<RandomN)|| (UserD>minA && UserD<maxA && UserD<RandomN)){
          minA=UserD;
        }
        else if(UserD>minA){
          maxA=UserD;
        }
        updateLCD();
        }
      }
    }
  }
}

bool singleClickEvent(int buttonPin, int &lastButtonState) {
  int reading = digitalRead(buttonPin);
  if (reading != lastButtonState) {
    lastButtonState = reading;
    if (reading == LOW) {
      return true;
    }
  }
  lastButtonState = reading;
  return false;
}
void updateLCD(){
  lcd.setCursor(0,1);
        lcd.print(minA);
        lcd.print(" < Point < ");
        lcd.print(maxA);
}
void start(){
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print(char(1));
  lcd.setCursor(2,0);
  lcd.print(char(1));
  lcd.setCursor(5,0);
  lcd.print("Start?");
  lcd.setCursor(13,0);
  lcd.print(char(1));
  lcd.setCursor(15,0);
  lcd.print(char(1));
  lcd.setCursor(1,1); 
  lcd.print(char(1)); 
  lcd.setCursor(3,1); 
  lcd.print(char(1)); 
  lcd.setCursor(12,1); 
  lcd.print(char(1)); 
  lcd.setCursor(14,1); 
  lcd.print(char(1)); 
}
void restart(){
     sproba = 0;
     maxA = 100;
     lcd.setCursor(0,0); 
     lcd.print("Sproba: ");
     lcd.print(sproba);
     lcd.setCursor(0,1);
     lcd.print(1);
     lcd.print(" < Point < ");
     lcd.print(100);
}