/*
 * This file is part of Applied Energistics 2.
 * Copyright (c) 2013 - 2015, AlgorithmX2, All rights reserved.
 *
 * Applied Energistics 2 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.
 *
 * Applied Energistics 2 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 Applied Energistics 2.  If not, see <http://www.gnu.org/licenses/lgpl>.
 */

package appeng.util;

import java.util.Comparator;

import appeng.api.config.SortDir;
import appeng.api.storage.data.IAEItemStack;
import appeng.util.item.AEItemStack;

public class ItemSorters {

    private static SortDir Direction = SortDir.ASCENDING;

    public static final Comparator<IAEItemStack> CONFIG_BASED_SORT_BY_NAME = (o1, o2) -> {
        final int cmp = Platform.getItemDisplayName(o1).getString()
                .compareToIgnoreCase(Platform.getItemDisplayName(o2).getString());
        return applyDirection(cmp);
    };

    public static final Comparator<IAEItemStack> CONFIG_BASED_SORT_BY_MOD = (o1, o2) -> {
        final AEItemStack op1 = (AEItemStack) o1;
        final AEItemStack op2 = (AEItemStack) o2;
        int cmp = op1.getModID().compareToIgnoreCase(op2.getModID());

        if (cmp == 0) {
            cmp = Platform.getItemDisplayName(o1).getString()
                    .compareToIgnoreCase(Platform.getItemDisplayName(o2).getString());
        }

        return applyDirection(cmp);
    };

    public static final Comparator<IAEItemStack> CONFIG_BASED_SORT_BY_SIZE = (o1, o2) -> {
        final int cmp = Long.compare(o2.getStackSize(), o1.getStackSize());
        return applyDirection(cmp);
    };

    private static SortDir getDirection() {
        return Direction;
    }

    public static void setDirection(final SortDir direction) {
        Direction = direction;
    }

    private static int applyDirection(int cmp) {
        if (getDirection() == SortDir.ASCENDING) {
            return cmp;
        }
        return -cmp;
    }
}