/*
 * Copyright (C) 2022 NotEnoughUpdates contributors
 *
 * This file is part of NotEnoughUpdates.
 *
 * NotEnoughUpdates is free software: you can redistribute it
 * and/or modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.
 *
 * NotEnoughUpdates is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with NotEnoughUpdates. If not, see <https://www.gnu.org/licenses/>.
 */

package io.github.moulberry.notenoughupdates.mbgui;

import org.lwjgl.util.vector.Vector2f;

import java.util.Collection;
import java.util.List;

public abstract class MBGuiGroupAligned extends MBGuiGroup {
	//Serialized
	private final List<MBGuiElement> children;
	private final boolean vertical;

	public MBGuiGroupAligned(List<MBGuiElement> children, boolean vertical) {
		this.children = children;
		this.vertical = vertical;
		recalculate();
	}

	public abstract int getPadding();

	public Collection<MBGuiElement> getChildren() {
		return children;
	}

	public void recalculate() {
		for (MBGuiElement child : children) {
			child.recalculate();
		}

		if (vertical) {
			height = 0;
			for (int i = 0; i < children.size(); i++) {
				MBGuiElement child = children.get(i);
				childrenPosition.put(child, new Vector2f(0, height));
				height += child.getHeight();
				if (i != children.size() - 1) height += getPadding();
			}

			width = 0;
			for (MBGuiElement child : children) {
				int childWidth = child.getWidth();
				if (childWidth > width) {
					width = childWidth;
				}
			}
		} else {
			width = 0;
			for (int i = 0; i < children.size(); i++) {
				MBGuiElement child = children.get(i);
				childrenPosition.put(child, new Vector2f(width, 0));
				width += child.getWidth();
				if (i != children.size() - 1) width += getPadding();
			}

			height = 0;
			for (MBGuiElement child : children) {
				int childHeight = child.getHeight();
				if (childHeight > height) {
					height = childHeight;
				}
			}
		}
	}
}