ActuallyAdditions/src/main/java/de/ellpeck/actuallyadditions/common/inventory/ContainerInputter.java

package de.ellpeck.actuallyadditions.common.inventory;

import de.ellpeck.actuallyadditions.common.inventory.gui.GuiInputter;
import de.ellpeck.actuallyadditions.common.inventory.slot.SlotFilter;
import de.ellpeck.actuallyadditions.common.inventory.slot.SlotItemHandlerUnconditioned;
import de.ellpeck.actuallyadditions.common.tile.TileEntityBase;
import de.ellpeck.actuallyadditions.common.tile.TileEntityInputter;
import de.ellpeck.actuallyadditions.common.util.StackUtil;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.inventory.ClickType;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.Slot;
import net.minecraft.item.ItemStack;

public class ContainerInputter extends Container {

    private final TileEntityInputter tileInputter;

    private final boolean isAdvanced;

    public ContainerInputter(InventoryPlayer inventory, TileEntityBase tile, boolean isAdvanced) {
        this.tileInputter = (TileEntityInputter) tile;
        this.isAdvanced = isAdvanced;

        this.addSlotToContainer(new SlotItemHandlerUnconditioned(this.tileInputter.inv, 0, 80, 21 + (isAdvanced ? 12 : 0)));

        if (isAdvanced) {
            for (int i = 0; i < 2; i++) {
                for (int x = 0; x < 3; x++) {
                    for (int y = 0; y < 4; y++) {
                        this.addSlotToContainer(new SlotFilter(i == 0 ? this.tileInputter.leftFilter : this.tileInputter.rightFilter, y + x * 4, 20 + i * 84 + x * 18, 6 + y * 18));
                    }
                }
            }
        }

        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 9; j++) {
                this.addSlotToContainer(new Slot(inventory, j + i * 9 + 9, 8 + j * 18, 101 + i * 18 + (isAdvanced ? GuiInputter.OFFSET_ADVANCED : 0)));
            }
        }
        for (int i = 0; i < 9; i++) {
            this.addSlotToContainer(new Slot(inventory, i, 8 + i * 18, 159 + (isAdvanced ? GuiInputter.OFFSET_ADVANCED : 0)));
        }
    }

    @Override
    public ItemStack transferStackInSlot(EntityPlayer player, int slot) {
        int inventoryStart = this.isAdvanced ? 25 : 1;
        int inventoryEnd = inventoryStart + 26;
        int hotbarStart = inventoryEnd + 1;
        int hotbarEnd = hotbarStart + 8;

        Slot theSlot = this.inventorySlots.get(slot);

        if (theSlot != null && theSlot.getHasStack()) {
            ItemStack newStack = theSlot.getStack();
            ItemStack currentStack = newStack.copy();

            //Other Slots in Inventory excluded
            if (slot >= inventoryStart) {
                //Shift from Inventory
                if (!this.mergeItemStack(newStack, 0, 1, false)) {
                    //
                    if (slot >= inventoryStart && slot <= inventoryEnd) {
                        if (!this.mergeItemStack(newStack, hotbarStart, hotbarEnd + 1, false)) { return StackUtil.getEmpty(); }
                    } else if (slot >= inventoryEnd + 1 && slot < hotbarEnd + 1 && !this.mergeItemStack(newStack, inventoryStart, inventoryEnd + 1, false)) { return StackUtil.getEmpty(); }
                }
            } else if (!this.mergeItemStack(newStack, inventoryStart, hotbarEnd + 1, false)) { return StackUtil.getEmpty(); }

            if (!StackUtil.isValid(newStack)) {
                theSlot.putStack(StackUtil.getEmpty());
            } else {
                theSlot.onSlotChanged();
            }

            if (newStack.getCount() == currentStack.getCount()) { return StackUtil.getEmpty(); }
            theSlot.onTake(player, newStack);

            return currentStack;
        }
        return StackUtil.getEmpty();
    }

    @Override
    public ItemStack slotClick(int slotId, int dragType, ClickType clickTypeIn, EntityPlayer player) {
        if (SlotFilter.checkFilter(this, slotId, player)) {
            return StackUtil.getEmpty();
        } else {
            return super.slotClick(slotId, dragType, clickTypeIn, player);
        }
    }

    @Override
    public boolean canInteractWith(EntityPlayer player) {
        return this.tileInputter.canPlayerUse(player);
    }
}