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

#define LCD_ADDR 0x27
#define LCD_COLUMNS 19
#define LCD_ROWS 4

LiquidCrystal_I2C lcd(LCD_ADDR, LCD_COLUMNS, LCD_ROWS);

#define PIN_VERT A0
#define PIN_HORZ A1

int x;

byte customChar0[8] = {
  0b00110,
  0b00100,
  0b01110,
  0b10101,
  0b00100,
  0b01010,
  0b01010,
  0b11011
};
byte customChar1[8] = {
  0b10001,
  0b11011,
  0b01010,
  0b01010,
  0b00000,
  0b10001,
  0b01110,
  0b00000
};
byte customChar2[8] = {
  0b00000,
  0b01110,
  0b10001,
  0b10101,
  0b10111,
  0b10001,
  0b01110,
  0b00000
};

void setup() {
  Serial.begin(9600);
  lcd.init(); 
  lcd.createChar(0, customChar0);
  lcd.createChar(1, customChar1);
  lcd.createChar(2, customChar2);
  lcd.begin(19, 4);
  lcd.backlight();
  pinMode(PIN_VERT, INPUT);
  pinMode(PIN_HORZ, INPUT);

}

void loop() {
  lcd.setCursor(5,0);
  lcd.write("Loading...");

  delay(100);
    
  lose(x,y,xE,yE);
  gamer(x,y,vert);
  enemy(xE,yE);
  
  delay(100);
  lcd.clear();
}

void gamer(int x, int y, int v) {
  if (v==0){
    y=y+0;
  }
  if (v==1){
    y=y-1;
  }
  if (v==-1){
    y=y+1;
  }
  if (old_y != y){
    old_y=y;
  }  

  Serial.print(" Gamer: ");
  Serial.print(x);
  Serial.println(old_y);
  lcd.setCursor(x,old_y);
  lcd.write((byte)0);
}

void enemy(int x, int y) {
  xE=x-1;
  if (xE <-1){
    xE=19;
    yE=random(0,3);
  }

  Serial.print(" Enemy: ");
  Serial.print(xE);
  Serial.println(yE);
  lcd.setCursor(xE,y);
  lcd.write((byte)1);
}

void lose(int x, int y, int xE, int yE){
  if ((x==xE)&&(y==yE)){
    lcd.setCursor(3,0);
    lcd.write("YOU LOSE");
  }
}