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package com.comp301.a02adventure;

import java.util.List;

public class GameImpl implements Game {

  private final Map map;
  private final Player player;

  public GameImpl(Map map, Player player) throws IllegalArgumentException {
    this.map = map;
    if (this.map == null) {
      throw new IllegalArgumentException("Map is null");
    }
    this.player = player;
    if (this.player == null) {
      throw new IllegalArgumentException("Player is null");
    }
  }

  @Override
  public Position getPlayerPosition() {
    return player.getPosition();
  }

  @Override
  public String getPlayerName() {
    return player.getName();
  }

  @Override
  public List<Item> getPlayerItems() {
    return player.getInventory().getItems();
  }

  @Override
  public boolean getIsWinner() {
    return player.getInventory().getNumItems() == map.getNumItems();
  }

  @Override
  public void printCellInfo() {
    System.out.println("Location: " + map.getCell(getPlayerPosition()).getName());
    System.out.println(map.getCell(getPlayerPosition()).getDescription());
    if ((map.getCell(getPlayerPosition()).getIsVisited())) {
      System.out.println("You have already visited this location.");
    }
    if ((map.getCell(getPlayerPosition()).hasChest())) {
      System.out.println("You found a chest! Type 'open' to see what's inside, or keep moving.");
    }
    map.getCell(getPlayerPosition()).visit();
  }

  @Override
  public void openChest() {
    if (!(map.getCell(getPlayerPosition()).hasChest())) {
      System.out.println("No chest to open, sorry!");
    } else {
      if (map.getCell(getPlayerPosition()).getChest().isEmpty()) {
        System.out.println("The chest is empty.");
      } else {
        System.out.println(
            "You collected these items: " + map.getCell(getPlayerPosition()).getChest().getItems());
        player.getInventory().transferFrom(map.getCell(getPlayerPosition()).getChest());
      }
    }
  }

  @Override
  public boolean canMove(Direction direction) {
    try {
      map.getCell(getPlayerPosition().getNeighbor(direction));
    } catch (Exception e) {
      return false;
    }
    return (map.getCell(getPlayerPosition().getNeighbor(direction)) != null)
        && ((getPlayerPosition().getNeighbor(direction).getX()) <= map.getWidth())
        && ((getPlayerPosition().getNeighbor(direction).getY()) <= map.getHeight());
  }

  @Override
  public void move(Direction direction) {
    if (!canMove(direction)) {
      System.out.println("You can't go that way! Try another direction.");
    } else {
      player.move(direction);
      printCellInfo();
    }
  }
}