/**
 * Date: 15.11.2016
 * Time: 9:41
 *
 * @author Savin Mikhail
 * @author Alexey Korshun
 */
public abstract class MvpViewHolder extends RecyclerView.ViewHolder {

    private MvpDelegate mMvpDelegate;

    private final MvpDelegate mParentDelegate;

    public MvpViewHolder(MvpDelegate<?> parentDelegate, final View itemView) {
        super(itemView);
        mParentDelegate = parentDelegate;
    }

    @Nullable
    protected MvpDelegate getMvpDelegate() {
        if (mMvpDelegate == null && getMvpChildId() != null) {
            mMvpDelegate = new MvpDelegate<>(this);
            mMvpDelegate.setParentDelegate(mParentDelegate, getMvpChildId());
        }
        return mMvpDelegate;
    }

    protected void destroyMvpDelegate() {
        if (getMvpDelegate() != null) {
            getMvpDelegate().onSaveInstanceState();
            getMvpDelegate().onDetach();
            mMvpDelegate = null;
        }
    }

    protected void createMvpDelegate() {
        if (getMvpDelegate() != null) {
            getMvpDelegate().onCreate();
            getMvpDelegate().onAttach();
            getMvpDelegate().onSaveInstanceState();
        }
    }

    protected abstract String getMvpChildId();
}