/*
 * Copyright (C) 2022 NotEnoughUpdates contributors
 *
 * This file is part of NotEnoughUpdates.
 *
 * NotEnoughUpdates 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.
 *
 * NotEnoughUpdates 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 NotEnoughUpdates. If not, see <https://www.gnu.org/licenses/>.
 */

package io.github.moulberry.notenoughupdates.miscfeatures;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import io.github.moulberry.notenoughupdates.NotEnoughUpdates;
import io.github.moulberry.notenoughupdates.autosubscribe.NEUAutoSubscribe;
import io.github.moulberry.notenoughupdates.core.config.ConfigUtil;
import io.github.moulberry.notenoughupdates.core.config.KeybindHelper;
import io.github.moulberry.notenoughupdates.core.util.render.RenderUtils;
import io.github.moulberry.notenoughupdates.events.ReplaceItemEvent;
import io.github.moulberry.notenoughupdates.events.SlotClickEvent;
import io.github.moulberry.notenoughupdates.mixins.AccessorGuiContainer;
import io.github.moulberry.notenoughupdates.util.ItemUtils;
import io.github.moulberry.notenoughupdates.util.SBInfo;
import io.github.moulberry.notenoughupdates.util.Utils;
import lombok.var;
import net.minecraft.client.Minecraft;
import net.minecraft.client.audio.ISound;
import net.minecraft.client.audio.PositionedSound;
import net.minecraft.client.audio.SoundCategory;
import net.minecraft.client.gui.Gui;
import net.minecraft.client.gui.ScaledResolution;
import net.minecraft.client.gui.inventory.GuiContainer;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.client.renderer.RenderHelper;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.client.renderer.WorldRenderer;
import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.inventory.IInventory;
import net.minecraft.inventory.Slot;
import net.minecraft.item.ItemStack;
import net.minecraft.util.ResourceLocation;
import net.minecraftforge.client.event.GuiScreenEvent;
import net.minecraftforge.fml.common.eventhandler.EventPriority;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
import org.lwjgl.input.Keyboard;
import org.lwjgl.input.Mouse;
import org.lwjgl.opengl.GL11;
import org.lwjgl.util.vector.Vector2f;

import java.io.File;
import java.util.Arrays;
import java.util.HashMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

@NEUAutoSubscribe
public class SlotLocking {
	private static final SlotLocking INSTANCE = new SlotLocking();

	private static final Gson GSON = new GsonBuilder().setPrettyPrinting().create();

	private static final LockedSlot DEFAULT_LOCKED_SLOT = new LockedSlot();

	private final ResourceLocation LOCK = new ResourceLocation("notenoughupdates:slotlocking/lock.png");
	private final ResourceLocation BOUND = new ResourceLocation("notenoughupdates:slotlocking/bound.png");

	public static SlotLocking getInstance() {
		return INSTANCE;
	}

	public static class LockedSlot {
		public boolean locked = false;
		public int boundTo = -1;

	}

	public static class SlotLockData {
		public LockedSlot[] lockedSlots = new LockedSlot[40];
		public LockedSlot[] riftLockedSlots = new LockedSlot[40];
	}

	public static class SlotLockProfile {

		public SlotLockData[] slotLockData = new SlotLockData[1];
	}

	public static class SlotLockingConfig {
		public HashMap<String, SlotLockProfile> profileData = new HashMap<>();
	}

	private SlotLockingConfig config = new SlotLockingConfig();
	private boolean lockKeyHeld = false;
	private Slot pairingSlot = null;

	private Slot realSlot = null;

	public void setRealSlot(Slot slot) {
		realSlot = slot;
	}

	public Slot getRealSlot() {return realSlot;}

	public void loadConfig(File file) {
		config = ConfigUtil.loadConfig(SlotLockingConfig.class, file, GSON);
		if (config == null) {
			config = new SlotLockingConfig();
		}
	}

	public void changedSlot(int slotNumber) {
		int pingModifier = NotEnoughUpdates.INSTANCE.config.slotLocking.slotLockSwapDelay;
		if (pingModifier == 0) {
			return;
		}
		if (!isSlotIndexLocked(slotNumber)) {
			return;
		}
		long currentTimeMilis = System.currentTimeMillis();

		for (int i = 0; i < slotChanges.length; i++) {
			if (i != slotNumber && slotChanges[i] != 0 && (slotChanges[i] + (long) pingModifier) > currentTimeMilis) {
				slotChanges[i] = 0;
			}
		}
		slotChanges[slotNumber] = currentTimeMilis;
	}

	public boolean isSwapedSlotLocked() {
		int pingModifier = NotEnoughUpdates.INSTANCE.config.slotLocking.slotLockSwapDelay;
		if (pingModifier == 0) {
			return false;
		}
		long currentTimeMilis = System.currentTimeMillis();

		for (int i = 0; i < slotChanges.length; i++) {
			if (slotChanges[i] != 0 && isSlotIndexLocked(i) && (slotChanges[i] + (long) pingModifier) > currentTimeMilis) {
				return true;
			}
		}
		return false;
	}

	private final long[] slotChanges = new long[9];

	public void saveConfig(File file) {
		ConfigUtil.saveConfig(config, file, GSON);
	}


	private static final Pattern WINDOW_REGEX = Pattern.compile(".+ Backpack (?:✦ )?\\(Slot #(\\d+)\\)");
	private static final Pattern ECHEST_WINDOW_REGEX = Pattern.compile("Ender Chest \\((\\d+)/(\\d+)\\)");


	private LockedSlot[] getDataForProfile() {
		if (!NotEnoughUpdates.INSTANCE.hasSkyblockScoreboard() ||
			!NotEnoughUpdates.INSTANCE.config.slotLocking.enableSlotLocking)
			return null;

		if (NotEnoughUpdates.INSTANCE.config.slotLocking.disableInStorage) {
			if (StorageManager.getInstance().isStorageOpen) return null;
			String openChestName = Utils.getOpenChestName();
			if (openChestName.trim().equals("Storage")) return null;

			openChestName = Utils.cleanColour(openChestName);

			Matcher matcher = WINDOW_REGEX.matcher(openChestName);
			Matcher matcherEchest = ECHEST_WINDOW_REGEX.matcher(openChestName);

			if (matcher.matches() || matcherEchest.matches()) {
				return null;
			}
		}

		String profileName = SBInfo.getInstance().currentProfile;
		if (profileName == null) profileName = "generic";

		SlotLockProfile profile = config.profileData.computeIfAbsent(
			profileName,
			k -> new SlotLockProfile()
		);

		if (profile.slotLockData[0] == null) {
			profile.slotLockData[0] = new SlotLockData();
		}

		if (!"rift".equals(SBInfo.getInstance().getLocation())) {
			return profile.slotLockData[0].lockedSlots;
		} else {
			return profile.slotLockData[0].riftLockedSlots;
		}
	}

	private LockedSlot getLockedSlot(LockedSlot[] lockedSlots, int index) {
		if (lockedSlots == null) {
			return DEFAULT_LOCKED_SLOT;
		}

		LockedSlot slot = lockedSlots[index];

		if (slot == null) {
			return DEFAULT_LOCKED_SLOT;
		}

		return slot;
	}

	private Slot getFocusedSlot(GuiContainer container) {
		final ScaledResolution scaledresolution = new ScaledResolution(Minecraft.getMinecraft());
		final int scaledWidth = scaledresolution.getScaledWidth();
		final int scaledHeight = scaledresolution.getScaledHeight();
		int mouseX = Mouse.getX() * scaledWidth / Minecraft.getMinecraft().displayWidth;
		int mouseY = scaledHeight - Mouse.getY() * scaledHeight / Minecraft.getMinecraft().displayHeight - 1;
		return ((AccessorGuiContainer) container).doGetSlotAtPosition(mouseX, mouseY);
	}

	@SubscribeEvent(priority = EventPriority.LOW)
	public void keyboardInput(GuiScreenEvent.KeyboardInputEvent.Pre event) {
		if (!NotEnoughUpdates.INSTANCE.hasSkyblockScoreboard() ||
			!NotEnoughUpdates.INSTANCE.config.slotLocking.enableSlotLocking) {
			return;
		}
		if (!(Minecraft.getMinecraft().currentScreen instanceof GuiContainer)) {
			return;
		}
		GuiContainer container = (GuiContainer) Minecraft.getMinecraft().currentScreen;

		int key = NotEnoughUpdates.INSTANCE.config.slotLocking.slotLockKey;
		if (!lockKeyHeld && KeybindHelper.isKeyPressed(key) && !Keyboard.isRepeatEvent()) {
			Slot slot = getFocusedSlot(container);
			if (slot != null && slot.getSlotIndex() != 8 && slot.inventory == Minecraft.getMinecraft().thePlayer.inventory) {
				int slotNum = slot.getSlotIndex();
				if (slotNum >= 0 && slotNum <= 39) {
					boolean isHotbar = slotNum < 9;
					boolean isInventory = !isHotbar && slotNum < 36;
					boolean isArmor = !isHotbar && !isInventory;

					if (isInventory || isArmor) {
						pairingSlot = slot;
					} else {
						pairingSlot = null;
					}

					LockedSlot[] lockedSlots = getDataForProfile();

					if (lockedSlots != null) {
						if (lockedSlots[slotNum] == null) {
							lockedSlots[slotNum] = new LockedSlot();
						}
						lockedSlots[slotNum].locked = !lockedSlots[slotNum].locked;
						lockedSlots[slotNum].boundTo = -1;

						if (NotEnoughUpdates.INSTANCE.config.slotLocking.slotLockSound) {
							float vol = NotEnoughUpdates.INSTANCE.config.slotLocking.slotLockSoundVol / 100f;
							if (vol > 0) {
								if (vol > 1) vol = 1;
								final float volF = vol;
								final boolean locked = lockedSlots[slotNum].locked;

								ISound sound = new PositionedSound(new ResourceLocation("random.orb")) {{
									volume = volF;
									pitch = locked ? 0.943f : 0.1f;
									repeat = false;
									repeatDelay = 0;
									attenuationType = ISound.AttenuationType.NONE;
								}};

								float oldLevel = Minecraft.getMinecraft().gameSettings.getSoundLevel(SoundCategory.PLAYERS);
								Minecraft.getMinecraft().gameSettings.setSoundLevel(SoundCategory.PLAYERS, 1);
								Minecraft.getMinecraft().getSoundHandler().playSound(sound);
								Minecraft.getMinecraft().gameSettings.setSoundLevel(SoundCategory.PLAYERS, oldLevel);
							}
						}

						if (isHotbar && lockedSlots[slotNum].locked) {
							for (int i = 9; i <= 39; i++) {
								if (lockedSlots[i] != null && lockedSlots[i].boundTo == slotNum) {
									lockedSlots[i].boundTo = -1;
								}
							}
						}
					}
				}
			}
		}
		lockKeyHeld = KeybindHelper.isKeyDown(key);
		if (!lockKeyHeld) {
			pairingSlot = null;
		}
	}

	@SubscribeEvent(priority = EventPriority.LOW)
	public void mouseEvent(GuiScreenEvent.MouseInputEvent.Pre event) {
		if (!NotEnoughUpdates.INSTANCE.hasSkyblockScoreboard() ||
			!NotEnoughUpdates.INSTANCE.config.slotLocking.enableSlotLocking) {
			return;
		}
		if (!(Minecraft.getMinecraft().currentScreen instanceof GuiContainer)) {
			return;
		}
		GuiContainer container = (GuiContainer) Minecraft.getMinecraft().currentScreen;

		if (NotEnoughUpdates.INSTANCE.config.slotLocking.enableSlotBinding && lockKeyHeld && pairingSlot != null) {
			final ScaledResolution scaledresolution = new ScaledResolution(Minecraft.getMinecraft());
			final int scaledWidth = scaledresolution.getScaledWidth();
			final int scaledHeight = scaledresolution.getScaledHeight();
			int mouseX = Mouse.getX() * scaledWidth / Minecraft.getMinecraft().displayWidth;
			int mouseY = scaledHeight - Mouse.getY() * scaledHeight / Minecraft.getMinecraft().displayHeight - 1;

			Slot slot = ((AccessorGuiContainer) container).doGetSlotAtPosition(mouseX, mouseY);
			if (slot != null && slot.getSlotIndex() != 8 && slot.inventory == Minecraft.getMinecraft().thePlayer.inventory) {
				int slotNum = slot.getSlotIndex();
				if (slotNum >= 0 && slotNum <= 39) {

					boolean isHotbar = slotNum < 9;
					boolean isInventory = !isHotbar && slotNum < 36;
					boolean isArmor = !isHotbar && !isInventory;

					int pairingNum = pairingSlot.getSlotIndex();
					if (isHotbar && slotNum != pairingNum) {
						LockedSlot[] lockedSlots = getDataForProfile();
						if (lockedSlots != null) {
							if (lockedSlots[slotNum] == null) {
								lockedSlots[slotNum] = new LockedSlot();
							}
							if (!lockedSlots[slotNum].locked) {
								if (lockedSlots[pairingNum] == null) {
									lockedSlots[pairingNum] = new LockedSlot();
								}

								lockedSlots[pairingNum].boundTo = slotNum;
								lockedSlots[pairingNum].locked = false;

								lockedSlots[slotNum].boundTo = pairingNum;
							}
						}
					}
				}
			} else {
				int pairingNum = pairingSlot.getSlotIndex();
				LockedSlot[] lockedSlots = getDataForProfile();
				if (lockedSlots != null && lockedSlots[pairingNum] != null) {
					if (lockedSlots[pairingNum].boundTo >= 0) {
						lockedSlots[lockedSlots[pairingNum].boundTo] = null;
					}
					lockedSlots[pairingNum] = null;
				}
			}
		}
	}

	public void toggleLock(int lockIndex) {
		if (lockIndex == 8) return;
		LockedSlot[] lockedSlots = getDataForProfile();

		if (lockedSlots != null) {
			if (lockedSlots[lockIndex] == null) {
				lockedSlots[lockIndex] = new LockedSlot();
			}
			lockedSlots[lockIndex].locked = !lockedSlots[lockIndex].locked;
			lockedSlots[lockIndex].boundTo = -1;

			if (NotEnoughUpdates.INSTANCE.config.slotLocking.slotLockSound) {
				float vol = NotEnoughUpdates.INSTANCE.config.slotLocking.slotLockSoundVol / 100f;
				if (vol > 0) {
					if (vol > 1) vol = 1;
					final float volF = vol;
					final boolean locked = lockedSlots[lockIndex].locked;

					ISound sound = new PositionedSound(new ResourceLocation("random.orb")) {{
						volume = volF;
						pitch = locked ? 0.943f : 0.1f;
						repeat = false;
						repeatDelay = 0;
						attenuationType = ISound.AttenuationType.NONE;
					}};

					float oldLevel = Minecraft.getMinecraft().gameSettings.getSoundLevel(SoundCategory.PLAYERS);
					Minecraft.getMinecraft().gameSettings.setSoundLevel(SoundCategory.PLAYERS, 1);
					Minecraft.getMinecraft().getSoundHandler().playSound(sound);
					Minecraft.getMinecraft().gameSettings.setSoundLevel(SoundCategory.PLAYERS, oldLevel);
				}
			}

			if (lockIndex < 9 && lockedSlots[lockIndex].locked) {
				for (int i = 9; i <= 39; i++) {
					if (lockedSlots[i] != null && lockedSlots[i].boundTo == lockIndex) {
						lockedSlots[i].boundTo = -1;
					}
				}
			}
		}
	}

	@SubscribeEvent(priority = EventPriority.LOW)
	public void drawScreenEvent(GuiScreenEvent.DrawScreenEvent.Post event) {
		if (NotEnoughUpdates.INSTANCE.config.slotLocking.enableSlotBinding && !event.isCanceled() && pairingSlot != null &&
			lockKeyHeld) {
			LockedSlot[] lockedSlots = getDataForProfile();
			LockedSlot lockedSlot = getLockedSlot(lockedSlots, pairingSlot.getSlotIndex());
			if (lockedSlot.boundTo >= 0 && lockedSlot.boundTo < 8) {
				return;
			}

			if (!(Minecraft.getMinecraft().currentScreen instanceof GuiContainer)) {
				return;
			}
			AccessorGuiContainer container = (AccessorGuiContainer) Minecraft.getMinecraft().currentScreen;

			int x1 = container.getGuiLeft() + pairingSlot.xDisplayPosition + 8;
			int y1 = container.getGuiTop() + pairingSlot.yDisplayPosition + 8;
			int x2 = event.mouseX;
			int y2 = event.mouseY;

			if (x2 > x1 - 8 && x2 < x1 + 8 &&
				y2 > y1 - 8 && y2 < y1 + 8) {
				return;
			}

			drawLinkArrow(x1, y1, x2, y2);
			setTopHalfBarrier = true;
		} else {
			setTopHalfBarrier = false;
		}
	}

	private void drawLinkArrow(int x1, int y1, int x2, int y2) {
		GlStateManager.color(0x33 / 255f, 0xee / 255f, 0xdd / 255f, 1f);
		GlStateManager.disableLighting();
		RenderHelper.disableStandardItemLighting();
		GlStateManager.disableTexture2D();
		GlStateManager.enableBlend();
		GlStateManager.tryBlendFuncSeparate(770, 771, 1, 0);

		GlStateManager.translate(0, 0, 500);
		drawLine(x1, y1, x2, y2);
		GlStateManager.translate(0, 0, -500);

		GlStateManager.enableTexture2D();
	}

	private void drawLine(int x1, int y1, int x2, int y2) {
		Vector2f vec = new Vector2f(x2 - x1, y2 - y1);
		vec.normalise(vec);
		Vector2f side = new Vector2f(vec.y, -vec.x);

		GL11.glLineWidth(1f);
		GL11.glEnable(GL11.GL_LINE_SMOOTH);

		Tessellator tessellator = Tessellator.getInstance();
		WorldRenderer worldrenderer = tessellator.getWorldRenderer();

		int lines = 6;
		for (int i = 0; i < lines; i++) {
			worldrenderer.begin(GL11.GL_LINES, DefaultVertexFormats.POSITION);
			worldrenderer.pos(x1 - side.x + side.x * i / lines, y1 - side.y + side.y * i / lines, 0.0D).endVertex();
			worldrenderer.pos(x2 - side.x + side.x * i / lines, y2 - side.y + side.y * i / lines, 0.0D).endVertex();
			tessellator.draw();
		}
	}

	@SubscribeEvent
	public void onWindowClick(SlotClickEvent slotClickEvent) {
		LockedSlot locked = getLockedSlot(slotClickEvent.slot);
		if (locked == null) {
			return;
		}
		if (locked.locked ||
			(slotClickEvent.clickType == 2 && SlotLocking.getInstance().isSlotIndexLocked(slotClickEvent.clickedButton))) {
			slotClickEvent.setCanceled(true);
			return;
		}
		if (NotEnoughUpdates.INSTANCE.config.slotLocking.enableSlotBinding
			&& slotClickEvent.clickType == 1 &&
			locked.boundTo != -1) {
			Slot boundSlot = slotClickEvent.guiContainer.inventorySlots.getSlotFromInventory(
				Minecraft.getMinecraft().thePlayer.inventory,
				locked.boundTo
			);

			if (boundSlot == null) {
				return;
			}

			LockedSlot boundLocked = getLockedSlot(boundSlot);

			if (!(Minecraft.getMinecraft().currentScreen instanceof GuiContainer)) {
				return;
			}
			GuiContainer container = (GuiContainer) Minecraft.getMinecraft().currentScreen;
			int size = container.inventorySlots.inventorySlots.size();

			int from, to;
			int id = slotClickEvent.slot.getSlotIndex();
			int idChest = id + (size - 45); // adjust the id of the clicked slot to align with the current inventory's number of slots

			if (idChest >= 9 && 0 <= locked.boundTo && locked.boundTo < 8 && !boundLocked.locked) {
				from = idChest;
				to = locked.boundTo;
				if (boundLocked == DEFAULT_LOCKED_SLOT) {
					LockedSlot[] lockedSlots = getDataForProfile();
					lockedSlots[locked.boundTo] = new LockedSlot();
					lockedSlots[locked.boundTo].boundTo = idChest;
				} else {
					boundLocked.boundTo = id;
				}
			} else if (0 <= id && id < 8 && locked.boundTo >= 9 && locked.boundTo <= 39) {
				if (boundLocked.locked || boundLocked.boundTo != id) {
					locked.boundTo = -1;
					return;
				} else {
					from = boundSlot.slotNumber;
					to = id;
				}
			} else {
				return;
			}
			if (from == 39) from = 5;
			if (from == 38) from = 6;
			if (from == 37) from = 7;
			if (from == 36) from = 8;
			Minecraft.getMinecraft().playerController.windowClick(
				slotClickEvent.guiContainer.inventorySlots.windowId,
				from, to, 2, Minecraft.getMinecraft().thePlayer
			);
			slotClickEvent.setCanceled(true);
		} else if (NotEnoughUpdates.INSTANCE.config.slotLocking.enableSlotBinding && locked.boundTo != -1 &&
			NotEnoughUpdates.INSTANCE.config.slotLocking.bindingAlsoLocks) {
			slotClickEvent.setCanceled(true);
		}
	}

	public void drawSlot(Slot slot) {
		LockedSlot locked = getLockedSlot(slot);
		if (locked != null) {
			if (locked.locked) {
				GlStateManager.translate(0, 0, 400);
				Minecraft.getMinecraft().getTextureManager().bindTexture(LOCK);
				GlStateManager.color(1, 1, 1, 0.5f);
				GlStateManager.depthMask(false);
				RenderUtils.drawTexturedRect(slot.xDisplayPosition, slot.yDisplayPosition, 16, 16, 0, 1, 0, 1, GL11.GL_NEAREST);
				GlStateManager.depthMask(true);
				GlStateManager.enableBlend();
				GlStateManager.translate(0, 0, -400);
			} else if (NotEnoughUpdates.INSTANCE.config.slotLocking.enableSlotBinding && slot.canBeHovered() &&
				locked.boundTo >= 0 && locked.boundTo <= 39) {
				if (!(Minecraft.getMinecraft().currentScreen instanceof GuiContainer)) {
					return;
				}
				GuiContainer container = (GuiContainer) Minecraft.getMinecraft().currentScreen;

				final ScaledResolution scaledresolution = new ScaledResolution(Minecraft.getMinecraft());
				final int scaledWidth = scaledresolution.getScaledWidth();
				final int scaledHeight = scaledresolution.getScaledHeight();
				int mouseX = Mouse.getX() * scaledWidth / Minecraft.getMinecraft().displayWidth;
				int mouseY = scaledHeight - Mouse.getY() * scaledHeight / Minecraft.getMinecraft().displayHeight - 1;

				Slot boundSlot = container.inventorySlots.getSlotFromInventory(
					Minecraft.getMinecraft().thePlayer.inventory,
					locked.boundTo
				);
				if (boundSlot == null) {
					return;
				}

				boolean hoverOverSlot = ((AccessorGuiContainer) container).doIsMouseOverSlot(slot, mouseX, mouseY);

				if (hoverOverSlot || slot.getSlotIndex() >= 9) {
					Minecraft.getMinecraft().getTextureManager().bindTexture(BOUND);
					GlStateManager.color(1, 1, 1, 0.7f);
					GlStateManager.depthMask(false);
					RenderUtils.drawTexturedRect(
						slot.xDisplayPosition,
						slot.yDisplayPosition,
						16,
						16,
						0,
						1,
						0,
						1,
						GL11.GL_NEAREST
					);
					GlStateManager.depthMask(true);
					GlStateManager.enableBlend();

					//Rerender Text over Top
					if (slot.getStack() != null) {
						Minecraft.getMinecraft().getRenderItem().renderItemOverlayIntoGUI(
							Minecraft.getMinecraft().fontRendererObj,
							slot.getStack(),
							slot.xDisplayPosition,
							slot.yDisplayPosition,
							null
						);
					}
				} else if (pairingSlot != null && lockKeyHeld && slot.getSlotIndex() < 8) {
					int x1 = ((AccessorGuiContainer) container).getGuiLeft() + pairingSlot.xDisplayPosition;
					int y1 = ((AccessorGuiContainer) container).getGuiTop() + pairingSlot.yDisplayPosition;

					if (mouseX <= x1 || mouseX >= x1 + 16 ||
						mouseY <= y1 || mouseY >= y1 + 16) {
						Gui.drawRect(
							slot.xDisplayPosition,
							slot.yDisplayPosition,
							slot.xDisplayPosition + 16,
							slot.yDisplayPosition + 16,
							0x80ffffff
						);
					}
				}

				if (hoverOverSlot) {
					LockedSlot boundLocked = getLockedSlot(boundSlot);
					if (boundLocked == null || boundLocked.locked ||
						(boundSlot.getSlotIndex() >= 9 && boundLocked.boundTo != slot.getSlotIndex())) {
						locked.boundTo = -1;
						return;
					}

					Minecraft.getMinecraft().getTextureManager().bindTexture(BOUND);
					GlStateManager.color(1, 1, 1, 0.7f);
					GlStateManager.depthMask(false);
					RenderUtils.drawTexturedRect(
						boundSlot.xDisplayPosition,
						boundSlot.yDisplayPosition,
						16,
						16,
						0,
						1,
						0,
						1,
						GL11.GL_NEAREST
					);
					GlStateManager.depthMask(true);
					GlStateManager.enableBlend();

					//Rerender Text over Top
					if (boundSlot.getStack() != null) {
						Minecraft.getMinecraft().getRenderItem().renderItemOverlayIntoGUI(
							Minecraft.getMinecraft().fontRendererObj,
							boundSlot.getStack(),
							boundSlot.xDisplayPosition,
							boundSlot.yDisplayPosition,
							null
						);
					}

					int maxIter = 100;
					float x1 = slot.xDisplayPosition + 8;
					float y1 = slot.yDisplayPosition + 8;
					float x2 = boundSlot.xDisplayPosition + 8;
					float y2 = boundSlot.yDisplayPosition + 8;
					Vector2f vec = new Vector2f(x2 - x1, y2 - y1);
					vec.normalise(vec);

					while (x1 > slot.xDisplayPosition && x1 < slot.xDisplayPosition + 16 &&
						y1 > slot.yDisplayPosition && y1 < slot.yDisplayPosition + 16) {
						if (maxIter-- < 50) break;
						x1 += vec.x;
						y1 += vec.y;
					}
					while (x2 > boundSlot.xDisplayPosition && x2 < boundSlot.xDisplayPosition + 16 &&
						y2 > boundSlot.yDisplayPosition && y2 < boundSlot.yDisplayPosition + 16) {
						if (maxIter-- < 0) break;
						x2 -= vec.x;
						y2 -= vec.y;
					}

					GlStateManager.translate(0, 0, 200);
					drawLinkArrow((int) x1, (int) y1, (int) x2, (int) y2);
					GlStateManager.translate(0, 0, -200);
				}
			} else if (NotEnoughUpdates.INSTANCE.config.slotLocking.enableSlotBinding && slot.getSlotIndex() < 8 &&
				pairingSlot != null && lockKeyHeld) {
				if (!(Minecraft.getMinecraft().currentScreen instanceof GuiContainer)) {
					return;
				}
				GuiContainer container = (GuiContainer) Minecraft.getMinecraft().currentScreen;

				final ScaledResolution scaledresolution = new ScaledResolution(Minecraft.getMinecraft());
				final int scaledWidth = scaledresolution.getScaledWidth();
				final int scaledHeight = scaledresolution.getScaledHeight();
				int mouseX = Mouse.getX() * scaledWidth / Minecraft.getMinecraft().displayWidth;
				int mouseY = scaledHeight - Mouse.getY() * scaledHeight / Minecraft.getMinecraft().displayHeight - 1;

				int x1 = ((AccessorGuiContainer) container).getGuiLeft() + pairingSlot.xDisplayPosition;
				int y1 = ((AccessorGuiContainer) container).getGuiTop() + pairingSlot.yDisplayPosition;

				if (mouseX <= x1 || mouseX >= x1 + 16 ||
					mouseY <= y1 || mouseY >= y1 + 16) {
					Gui.drawRect(
						slot.xDisplayPosition,
						slot.yDisplayPosition,
						slot.xDisplayPosition + 16,
						slot.yDisplayPosition + 16,
						0x80ffffff
					);
				}
			}
		}
	}

	public LockedSlot getLockedSlot(Slot slot) {
		if (!NotEnoughUpdates.INSTANCE.hasSkyblockScoreboard() ||
			!NotEnoughUpdates.INSTANCE.config.slotLocking.enableSlotLocking)
			return null;
		if (slot == null) {
			return null;
		}
		if (slot.inventory != Minecraft.getMinecraft().thePlayer.inventory) {
			return null;
		}
		int index = slot.getSlotIndex();
		if (index < 0 || index > 39) {
			return null;
		}
		return getLockedSlotIndex(index);
	}

	public LockedSlot getLockedSlotIndex(int index) {
		if (!NotEnoughUpdates.INSTANCE.hasSkyblockScoreboard() ||
			!NotEnoughUpdates.INSTANCE.config.slotLocking.enableSlotLocking) {
			return null;
		}

		LockedSlot[] lockedSlots = getDataForProfile();
		if (lockedSlots == null) {
			return null;
		}
		return getLockedSlot(lockedSlots, index);
	}

	public boolean isSlotLocked(Slot slot) {
		LockedSlot locked = getLockedSlot(slot);
		return locked != null &&
			(locked.locked || (NotEnoughUpdates.INSTANCE.config.slotLocking.bindingAlsoLocks && locked.boundTo != -1));
	}

	public boolean isSlotIndexLocked(int index) {
		LockedSlot locked = getLockedSlotIndex(index);

		return locked != null &&
			(locked.locked || (NotEnoughUpdates.INSTANCE.config.slotLocking.bindingAlsoLocks && locked.boundTo != -1));
	}

	boolean setTopHalfBarrier = false;

	private boolean shouldShowBarrier(int slotNumber, IInventory inventory) {
		if (!(inventory instanceof InventoryPlayer))
			return false;
		if (slotNumber < 9)
			return false;
		if (pairingSlot != null && (slotNumber == pairingSlot.slotNumber || isArmourSlot(
			slotNumber,
			pairingSlot.slotNumber
		)))
			return false;
		if (!setTopHalfBarrier)
			return false;
		return true;
	}

	@SubscribeEvent(priority = EventPriority.LOW)
	public void afterRenderInventory(GuiScreenEvent.DrawScreenEvent.Post event) {
		if (!(event.gui instanceof GuiContainer)) return;
		var gui = (GuiContainer) event.gui;
		var slot = getFocusedSlot(gui);
		if (slot == null || !shouldShowBarrier(slot.getSlotIndex(), slot.inventory))
			return;
		final var scaledresolution = new ScaledResolution(Minecraft.getMinecraft());
		final int scaledWidth = scaledresolution.getScaledWidth();
		final int scaledHeight = scaledresolution.getScaledHeight();
		int mouseX = Mouse.getX() * scaledWidth / Minecraft.getMinecraft().displayWidth;
		int mouseY = scaledHeight - Mouse.getY() * scaledHeight / Minecraft.getMinecraft().displayHeight - 1;
		Utils.drawHoveringText(
			Arrays.asList(
				"§cYou cannot bind slots to anything except the hotbar.",
				"§cBinding to a normal inventory slot would require cheats.",
				"§cAnd you are not a cheater, are you?",
				"§cWe certainly hope you are not."),
			mouseX,
			mouseY,
			scaledWidth,
			scaledHeight,
			-1
		);
	}

	@SubscribeEvent
	public void barrierInventory(ReplaceItemEvent event) {
		if (!shouldShowBarrier(event.getSlotNumber(), event.getInventory())) return;
		ItemStack stack = new ItemStack(Blocks.barrier);
		ItemUtils.getOrCreateTag(stack).setBoolean(
			"NEUHIDETOOLIP",
			true
		);
		event.replaceWith(stack);
	}

	boolean isArmourSlot(int eventSlotNumber, int pairingSlotNumber) {
		if (eventSlotNumber == 39 && pairingSlotNumber == 5) return true;
		if (eventSlotNumber == 38 && pairingSlotNumber == 6) return true;
		if (eventSlotNumber == 37 && pairingSlotNumber == 7) return true;
		if (eventSlotNumber == 36 && pairingSlotNumber == 8) return true;
		return false;
	}

	public void resetSlotLocking() {
		String profileName = SBInfo.getInstance().currentProfile;
		if (profileName == null) profileName = "generic";
		SlotLockProfile slotLockProfile = config.profileData.get(profileName);
		if (slotLockProfile != null) {
			slotLockProfile.slotLockData[0] = new SlotLockData();
		}
	}
}