/*
 * 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.integration.IntegrationRegistry;
import appeng.integration.IntegrationType;
import appeng.integration.abstraction.IInvTweaks;
import appeng.util.item.AEItemStack;

public class ItemSorters {
    private static SortDir Direction = SortDir.ASCENDING;

    public static final Comparator<IAEItemStack> CONFIG_BASED_SORT_BY_NAME
        = new Comparator<IAEItemStack>() {
              @Override
              public int compare(final IAEItemStack o1, final IAEItemStack o2) {
                  if (getDirection() == SortDir.ASCENDING) {
                      return Platform.getItemDisplayName(o1).compareToIgnoreCase(
                          Platform.getItemDisplayName(o2)
                      );
                  }
                  return Platform.getItemDisplayName(o2).compareToIgnoreCase(
                      Platform.getItemDisplayName(o1)
                  );
              }
          };
    public static final Comparator<IAEItemStack> CONFIG_BASED_SORT_BY_MOD
        = new Comparator<IAEItemStack>() {
              @Override
              public int compare(final IAEItemStack o1, final IAEItemStack o2) {
                  final AEItemStack op1 = (AEItemStack) o1;
                  final AEItemStack op2 = (AEItemStack) o2;

                  if (getDirection() == SortDir.ASCENDING) {
                      return this.secondarySort(
                          op2.getModID().compareToIgnoreCase(op1.getModID()), o1, o2
                      );
                  }
                  return this.secondarySort(
                      op1.getModID().compareToIgnoreCase(op2.getModID()), o2, o1
                  );
              }

              private int secondarySort(
                  final int compareToIgnoreCase,
                  final IAEItemStack o1,
                  final IAEItemStack o2
              ) {
                  if (compareToIgnoreCase == 0) {
                      return Platform.getItemDisplayName(o2).compareToIgnoreCase(
                          Platform.getItemDisplayName(o1)
                      );
                  }

                  return compareToIgnoreCase;
              }
          };
    public static final Comparator<IAEItemStack> CONFIG_BASED_SORT_BY_SIZE
        = new Comparator<IAEItemStack>() {
              @Override
              public int compare(final IAEItemStack o1, final IAEItemStack o2) {
                  if (getDirection() == SortDir.ASCENDING) {
                      return compareLong(o2.getStackSize(), o1.getStackSize());
                  }
                  return compareLong(o1.getStackSize(), o2.getStackSize());
              }
          };
    private static IInvTweaks api;
    public static final Comparator<IAEItemStack> CONFIG_BASED_SORT_BY_INV_TWEAKS
        = new Comparator<IAEItemStack>() {
              @Override
              public int compare(final IAEItemStack o1, final IAEItemStack o2) {
                  if (api == null) {
                      return CONFIG_BASED_SORT_BY_NAME.compare(o1, o2);
                  }

                  final int cmp = api.compareItems(o1.getItemStack(), o2.getItemStack());

                  if (getDirection() == SortDir.ASCENDING) {
                      return cmp;
                  }
                  return -cmp;
              }
          };

    public static void init() {
        if (api != null) {
            return;
        }

        if (IntegrationRegistry.INSTANCE.isEnabled(IntegrationType.InvTweaks)) {
            api = (IInvTweaks
            ) IntegrationRegistry.INSTANCE.getInstance(IntegrationType.InvTweaks);
        } else {
            api = null;
        }
    }

    public static int compareInt(final int a, final int b) {
        if (a == b) {
            return 0;
        }
        if (a < b) {
            return -1;
        }
        return 1;
    }

    public static int compareLong(final long a, final long b) {
        if (a == b) {
            return 0;
        }
        if (a < b) {
            return -1;
        }
        return 1;
    }

    public static int compareDouble(final double a, final double b) {
        if (a == b) {
            return 0;
        }
        if (a < b) {
            return -1;
        }
        return 1;
    }

    private static SortDir getDirection() {
        return Direction;
    }

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