package com.minecolonies.coremod.inventory;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.inventory.*;
import net.minecraft.item.ItemStack;
import net.minecraft.item.crafting.CraftingManager;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.World;

import javax.annotation.Nullable;

public class CraftingGUIBuilding extends Container
{
    /**
     * The crafting matrix inventory (3x3).
     */
    public InventoryCrafting craftMatrix = new InventoryCrafting(this, 2, 2);
    public IInventory        craftResult = new InventoryCraftResult();
    private final World worldObj;

    /**
     * Position of the workbench
     */
    private final BlockPos pos;

    public CraftingGUIBuilding(InventoryPlayer playerInventory, World worldIn, BlockPos posIn)
    {
        this.worldObj = worldIn;
        this.pos = posIn;
        this.addSlotToContainer(new SlotCrafting(playerInventory.player, this.craftMatrix, this.craftResult, 0, 124, 35));

        for (int i = 0; i < 2; ++i)
        {
            for (int j = 0; j < 2; ++j)
            {
                this.addSlotToContainer(new Slot(this.craftMatrix, j + i * 2, 30 + j * 18, 17 + i * 18));
            }
        }

        for (int l = 0; l < 3; ++l)
        {
            for (int j1 = 0; j1 < 9; ++j1)
            {
                this.addSlotToContainer(new Slot(playerInventory, j1 + l * 9 + 9,  8 + j1 * 18, 84 + l * 18));
            }
        }

        for (int i1 = 0; i1 < 9; ++i1)
        {
            this.addSlotToContainer(new Slot(playerInventory, i1, 8 + i1 * 18, 142));
        }

        this.onCraftMatrixChanged(this.craftMatrix);
    }

    /**
     * Callback for when the crafting matrix is changed.
     */
    public void onCraftMatrixChanged(IInventory inventoryIn)
    {
        //todo can use this to get the recipe on button click
        this.craftResult.setInventorySlotContents(0, CraftingManager.getInstance().findMatchingRecipe(this.craftMatrix, this.worldObj));
    }

    /**
     * Called when the container is closed.
     */
    public void onContainerClosed(EntityPlayer playerIn)
    {
        super.onContainerClosed(playerIn);

        if (!this.worldObj.isRemote)
        {
            for (int i = 0; i < 9; ++i)
            {
                ItemStack itemstack = this.craftMatrix.removeStackFromSlot(i);

                if (itemstack != null)
                {
                    playerIn.dropItem(itemstack, false);
                }
            }
        }
    }

    public boolean canInteractWith(EntityPlayer playerIn)
    {
        return this.worldObj.getBlockState(this.pos).getBlock() != Blocks.CRAFTING_TABLE
                ? false
                : playerIn.getDistanceSq((double) this.pos.getX() + 0.5D, (double) this.pos.getY() + 0.5D, (double) this.pos.getZ() + 0.5D) <= 64.0D;
    }

    /**
     * Take a stack from the specified inventory slot.
     */
    @Nullable
    public ItemStack transferStackInSlot(EntityPlayer playerIn, int index)
    {
        ItemStack itemstack = null;
        Slot slot = (Slot) this.inventorySlots.get(index);

        if (slot != null && slot.getHasStack())
        {
            ItemStack itemstack1 = slot.getStack();
            itemstack = itemstack1.copy();

            if (index == 0)
            {
                if (!this.mergeItemStack(itemstack1, 10, 46, true))
                {
                    return null;
                }

                slot.onSlotChange(itemstack1, itemstack);
            }
            else if (index >= 5 && index < 32)
            {
                if (!this.mergeItemStack(itemstack1, 32, 41, false))
                {
                    return null;
                }
            }
            else if (index >= 32 && index < 41)
            {
                if (!this.mergeItemStack(itemstack1, 5, 32, false))
                {
                    return null;
                }
            }
            else if (!this.mergeItemStack(itemstack1, 5, 41, false))
            {
                return null;
            }

            if (itemstack1.stackSize == 0)
            {
                slot.putStack((ItemStack) null);
            }
            else
            {
                slot.onSlotChanged();
            }

            if (itemstack1.stackSize == itemstack.stackSize)
            {
                return null;
            }

            slot.onPickupFromSlot(playerIn, itemstack1);
        }

        return itemstack;
    }

    /**
     * Called to determine if the current slot is valid for the stack merging (double-click) code. The stack passed in
     * is null for the initial slot that was double-clicked.
     */
    public boolean canMergeSlot(ItemStack stack, Slot slotIn)
    {
        return slotIn.inventory != this.craftResult && super.canMergeSlot(stack, slotIn);
    }
}