#include<Wire.h>
#include<LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0X27, 16,2); 

boolean dinoOnGround = true;  
int buttonPin = 7;
int buzzerPin = 8;
int ledPin = 9;
int buttonState = 0; 
int highScore = 0; 
boolean playState = false;
int dist = 0;   
int distTwo = 0;
int score = 0;

byte dino [8]        
{ B00000,
  B00111,
  B00101,
  B10111,
  B11100,
  B11111,
  B01101,
  B01100,
};

byte tree [8]      
{
  B00011,
  B11011,
  B11011,
  B11011,
  B11011,
  B11111,
  B01110,
  B01110
};

void setup() {
  lcd.begin(16,2);
  lcd.createChar(7, dino);
  lcd.createChar(6,tree);
  lcd.setCursor(0,1);
  lcd.write(7);
  lcd.backlight();
  pinMode(buttonPin, INPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  lcd.clear();

  if(!playState){  
    lcd.setCursor(0,0);                
    lcd.print("Press to start"); 

    if(digitalRead(buttonPin)==HIGH) {
      playState = true; 
    }
  }
  
  if(playState) {
    startGame();
  }

  delay(100); 
}

void startGame() {  
  lcd.clear();
  dist = random(4,9);  
  distTwo = random(4,9);

  for(int i=16; i>=-(dist+distTwo); i--) { 
    lcd.setCursor(13,0);
    lcd.print(score);

    int state = digitalRead(buttonPin);  

    if(state == HIGH) {
      buttonState = 1;
      tone(buzzerPin,700,100);
    }
    else if(state == LOW) {
      buttonState = 0;
    }

    if(buttonState == 1){  
      lcd.setCursor(1,0); 
      lcd.write(7);
      lcd.setCursor(1,1);
      lcd.print(" ");
      dinoOnGround = false;
    }
    else {                          
      lcd.setCursor(1,1); 
      lcd.write(7); 
      lcd.setCursor(1,0);
      lcd.print(" ");
      dinoOnGround = true;
    }

    lcd.setCursor(i,1); 
    lcd.write(6);
    lcd.setCursor(i+1,1);
    lcd.print(" ");

    lcd.setCursor(i+dist,1);
    lcd.write(6);
    lcd.setCursor(i+dist+1,1);
    lcd.print(" ");

    lcd.setCursor(i+dist+distTwo,1);
    lcd.write(6);
    lcd.setCursor(i+dist+distTwo+1,1);
    lcd.print(" ");

    if((i+dist+distTwo)==-1){
      i=12;                    
    }

    if(i==1 && (dinoOnGround == true)) {
      gameOver();
      break;
    }
    else if(i+dist == 1 && (dinoOnGround == true)) {
      gameOver();
      break;
    }
    else if(i+dist+distTwo == 1 && (dinoOnGround == true)) {
      gameOver();
      break;
    }

    score++;  
    delay(500);
  }
}

void gameOver() {
  lcd.clear();
  lcd.print("YOU LOSE");
  
  if(score > highScore) {
    highScore = score;
  }
  
  lcd.setCursor(0,1);
  lcd.print("HIGH : ");
  lcd.print(highScore);
  
  playState = false;
  flashAndSound();
  delay(5000);
  score = 0;
}

void flashAndSound() {
  int buzzerDuration = 2000; 
  int flashDuration = 100; 

  for (int i = 0; i < buzzerDuration / flashDuration; i++) {
    digitalWrite(ledPin, HIGH);
    tone(buzzerPin, 700, flashDuration); 
    delay(flashDuration); 
    digitalWrite(ledPin, LOW);
    delay(flashDuration); 
  }
}