import java.lang.reflect.Array;
import java.util.Random;

public class EntityWithExtraCreator <T extends EntityLocomotive, U extends IDrawningExtra> {
    private final Object[] entityArr;
    private final Object[] extraArr;

    int entitiesCount = 0;
    int extraCount = 0;

    public EntityWithExtraCreator(int countEntities, int countExtra) {
        entityArr = new Object[countEntities];
        extraArr = new Object[countExtra];
    }

    public void Insert(T entityLocomotive) {
        if(entitiesCount < entityArr.length) {
            entityArr[entitiesCount] = entityLocomotive;
            entitiesCount++;
        }
    }

    public void Insert (U extra) {
        if(extraCount < extraArr.length) {
            extraArr[extraCount] = extra;
            extraCount++;
        }
    }

    public DrawningLocomotive getEntityWithExtra() {
        Random random = new Random();
        int getEntityRandomIndex = random.nextInt(entityArr.length);
        int getExtraRandomIndex = random.nextInt(extraArr.length);

        EntityLocomotive locomotive = (T)entityArr[getEntityRandomIndex];
        IDrawningExtra extra = (U)extraArr[getExtraRandomIndex];

        if (locomotive instanceof EntityWarmlyLocomotive) {
            return  new DrawningWarmlyLocomotive(locomotive, extra);
        }
        return new DrawningLocomotive(locomotive, extra);
    }

}