import java.util.HashMap;
import java.util.Set;

public class MapsCollection {
    private final HashMap<String, MapWithSetTracktorGeneric<DrawningObjectExcavator, AbstractMap>> _mapsStorage;

    private final int _pictureWidth;
    private final int _pictureHeight;

    public Set<String> getKeys() {
        return _mapsStorage.keySet();
    }

    public MapsCollection(int pictureWidth, int pictureHeight) {
        _mapsStorage = new HashMap<>();
        _pictureWidth = pictureWidth;
        _pictureHeight = pictureHeight;
    }

    public void addMap(String name, AbstractMap map) {
        if (!_mapsStorage.containsKey(name)) {
            _mapsStorage.put(name, new MapWithSetTracktorGeneric<>(_pictureWidth, _pictureHeight, map));
        }
    }

    public void deleteMap(String name) {
        _mapsStorage.remove(name);
    }

    public MapWithSetTracktorGeneric<DrawningObjectExcavator, AbstractMap> getMap(String name) {
        return _mapsStorage.getOrDefault(name, null);
    }
}