#include <LiquidCrystal_I2C.h>
#include "graph.h"
LiquidCrystal_I2C lcd(0x27, 20, 4);
const int LCD_H = 4; // высота
const int LCD_W = 20; // ширина

const int MAP_H = 4;
const int MAP_W = 20;

char game_map[MAP_H][MAP_W];

const char player = 239;
const char space = ' ' ;
const char wall = '|' ;
const char hp = '@' ;
const char monster = '$' ;
const char item = 243 ;
int p_x = 0;
int p_y = 0;

const int button_l = 1;
const int button_r = 2;
const int button_up = 3;
const int button_down = 4;

void map_show () {
  for (int y = 0; y < LCD_H; y++) {
    for (int x = 0; x < LCD_W; x++) {
      lcd.setCursor(x, y);
      if ((p_x == x) && (p_y == y)) {
        lcd.print(player);
      }
      else {
        lcd.print(game_map[y][x]);
      }
    }
  }
}

void map_gen() {
  for (int y = 0; y < LCD_H; y++) {
    for (int x = 0; x < LCD_W; x++) {
      game_map[y][x] = space;
    }
  }
  game_map[0][5] = wall;
  game_map[0][10] = hp;
  game_map[1][2] = wall;
  game_map[1][8] = monster;
  game_map[1][15] = item;

}

void setup() {
  lcd.init();
  lcd.backlight();
  pinMode(button_l, INPUT_PULLUP);
  pinMode(button_r, INPUT_PULLUP);
  pinMode(button_up, INPUT_PULLUP);
  pinMode(button_down, INPUT_PULLUP);
  map_gen();
}

//функция проверки, находится ли на клетке карты
bool is_wall(int x, int y) {
  return game_map[y][x] == wall;
}

bool is_hp(int x, int y) {
  return game_map[y][x] == hp;
}

bool is_monster(int x, int y) {
  return game_map[y][x] == monster;
}

bool is_item(int x, int y) {
  return game_map[y][x] == item;
}

//функция для размещения обьекта на карте
//по координатам х и у
void map_set(int x, int y, char object) {
  game_map[x][y] = object;
}

void game_over () {
  lcd.setCursor (0, 0);
  lcd.print("---OKONCHENO---");
  lcd.setCursor (0, 1);
  lcd.print("---------------");
  delay(2000);
  p_x = 0;
  p_y = 0;
  map_gen();
//    lcd.noBacklight();
}

void win() {
  lcd.setCursor (0, 0);
  lcd.print("----------------");
  lcd.setCursor (0, 1);
  lcd.print("---URA POBEDA---");
  delay(2000);
  p_x = 0;
  p_y = 0;
  map_gen();
  //  lcd.noBacklight();
}

void loop() {
  map_show();
  if (digitalRead(button_l) ==  LOW) {
    if ((p_x > 0) && (! is_wall(p_x - 1, p_y))) {
      p_x --;
    }
  }

  if (digitalRead(button_r) ==  LOW) {
    if ((p_x < LCD_W - 1) && (! is_wall(p_x + 1, p_y))) {
      p_x ++;
    }
  }

  if (digitalRead(button_up) ==  LOW) {
    if ((p_y > 0) && (! is_wall(p_x, p_y - 1))) {
      p_y--;
    }
  }
  if (digitalRead(button_down) ==  LOW) {
    if ((p_y < LCD_H - 1) && (! is_wall(p_x, p_y + 1))) {
      p_y++;
    }
  }
  if (is_hp(p_x, p_y)) {
    map_set(p_x, p_y, space);

  }

  if (is_monster(p_x, p_y)) {
    game_over();
  }

  if (is_item(p_x, p_y)) {
    win();
  }

  lcd.setCursor(p_x, p_y );
  lcd.print(player);
  delay(100);
  lcd.clear();
}