package net.minecraft.server;

import com.google.common.collect.Lists;
import java.util.ArrayList;

public class RecipeRepair implements IRecipe {

    public RecipeRepair() {}

    public boolean a(InventoryCrafting inventorycrafting, World world) {
        ArrayList arraylist = Lists.newArrayList();

        for (int i = 0; i < inventorycrafting.getSize(); ++i) {
            ItemStack itemstack = inventorycrafting.getItem(i);

            if (!itemstack.isEmpty()) {
                arraylist.add(itemstack);
                if (arraylist.size() > 1) {
                    ItemStack itemstack1 = (ItemStack) arraylist.get(0);

                    if (itemstack.getItem() != itemstack1.getItem() || itemstack1.getCount() != 1 || itemstack.getCount() != 1 || !itemstack1.getItem().usesDurability()) {
                        return false;
                    }
                }
            }
        }

        return arraylist.size() == 2;
    }

    public ItemStack craftItem(InventoryCrafting inventorycrafting) {
        ArrayList arraylist = Lists.newArrayList();

        ItemStack itemstack;

        for (int i = 0; i < inventorycrafting.getSize(); ++i) {
            itemstack = inventorycrafting.getItem(i);
            if (!itemstack.isEmpty()) {
                arraylist.add(itemstack);
                if (arraylist.size() > 1) {
                    ItemStack itemstack1 = (ItemStack) arraylist.get(0);

                    if (itemstack.getItem() != itemstack1.getItem() || itemstack1.getCount() != 1 || itemstack.getCount() != 1 || !itemstack1.getItem().usesDurability()) {
                        return ItemStack.a;
                    }
                }
            }
        }

        if (arraylist.size() == 2) {
            ItemStack itemstack2 = (ItemStack) arraylist.get(0);

            itemstack = (ItemStack) arraylist.get(1);
            if (itemstack2.getItem() == itemstack.getItem() && itemstack2.getCount() == 1 && itemstack.getCount() == 1 && itemstack2.getItem().usesDurability()) {
                Item item = itemstack2.getItem();
                int j = item.getMaxDurability() - itemstack2.i();
                int k = item.getMaxDurability() - itemstack.i();
                int l = j + k + item.getMaxDurability() * 5 / 100;
                int i1 = item.getMaxDurability() - l;

                if (i1 < 0) {
                    i1 = 0;
                }

                return new ItemStack(itemstack2.getItem(), 1, i1);
            }
        }

        return ItemStack.a;
    }

    public int a() {
        return 4;
    }

    public ItemStack b() {
        return ItemStack.a;
    }

    public NonNullList<ItemStack> b(InventoryCrafting inventorycrafting) {
        NonNullList nonnulllist = NonNullList.a(inventorycrafting.getSize(), ItemStack.a);

        for (int i = 0; i < nonnulllist.size(); ++i) {
            ItemStack itemstack = inventorycrafting.getItem(i);

            if (itemstack.getItem().s()) {
                nonnulllist.set(i, new ItemStack(itemstack.getItem().r()));
            }
        }

        return nonnulllist;
    }
}