import java.util.Random;

public class DrawningEntities <T extends EntityBoat, U extends IDrawningOars>
{
    public T[] _entities;
    public U[] _oars;
    int entitiesCount = 0;
    int oarsCount = 0;
    String  indx;
    String indy;

    public DrawningEntities(int countE,int countI){
        _entities = (T[]) new EntityBoat[countE];
        _oars = (U[]) new IDrawningOars[countI];
    }

    public int Insert(T boat){
        if(entitiesCount < _entities.length){
            _entities[entitiesCount] = boat;
            entitiesCount++;
            return entitiesCount - 1;
        }
        return -1;
    }

    public int Insert(U oars){
        if(oarsCount < _oars.length){
            _oars[oarsCount] = oars;
            oarsCount++;
            return oarsCount - 1;
        }
        return -1;
    }

    public void SetIndexs(int ind1, int ind2)
    {
        indx=Integer.toString(ind1);
        indy=Integer.toString(ind2);
    }

    public DrawningBoat CreateBoat(){
        Random random = new Random();
        int indEnt = 0;
        int indOar = 0;
        if(entitiesCount - 1 != 0 & oarsCount - 1 != 0){
            indEnt = random.nextInt(0,entitiesCount - 1);
            indOar = random.nextInt(0, oarsCount - 1);
        }
        T boat = (T)_entities[indEnt];
        U oar = (U)_oars[indOar];
        SetIndexs(indEnt,indOar);
        if(boat instanceof EntityCatamaran){
            return new DrawningCatamaran(boat,oar);
        }
        return new DrawningBoat(boat,oar);
    }
}