package com.entryrise.afkguard.gui;

import java.util.HashMap;
import java.util.Map;
import java.util.UUID;

import org.bukkit.Bukkit;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.inventory.InventoryClickEvent;
import org.bukkit.event.inventory.InventoryCloseEvent;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemStack;

import com.entryrise.afkguard.Main;


public abstract class GUI implements Listener {

	private int size;
	private String title;
	private boolean persistent;

	public Map<UUID, GUIInventory> invs = null;

	// Decorate inventory (Borders, blabla)
	public abstract void decorateInventory(Inventory inv);

	public abstract void setGUIItems(GUIInventory ginv, UUID u);

	protected boolean isPersistent() {
		return persistent;
	}
	
	public GUI getCurrentInstance() {
		return this;
	}

	public GUI(String title, int size, boolean persistent) {
		this.title = title;
		this.size = size;
		this.persistent = persistent;

		invs = new HashMap<UUID, GUIInventory>();

		Bukkit.getPluginManager().registerEvents(this, Main.p);
	}

	public void openInventory(Player p) {
		p.openInventory(getInventory(p));
	}

	public Inventory getInventory(Player p) {
		UUID u = p.getUniqueId();

		if (invs.containsKey(u)) {
			return invs.get(u).inv;
		}

		return createInventory(u);
	}

	private Inventory createInventory(UUID u) {
		Inventory inv = Bukkit.createInventory(null, size, title);

		decorateInventory(inv);

		GUIInventory ginv = new GUIInventory(inv);

		invs.put(u, ginv);

		setGUIItems(ginv, u);

		return inv;
	}

	public void refreshInventory(UUID u) {
		GUIInventory ginv = invs.get(u);
		
		if (ginv == null) {
			return;
		}
		
		ginv.reset();

		decorateInventory(ginv.inv);
		setGUIItems(ginv, u);
	}

	@EventHandler
	public void onClick(InventoryClickEvent e) {
		if (e.isCancelled()) {
			return;
		}

		Player p = (Player) e.getWhoClicked();
		Inventory inv = e.getClickedInventory();
		ItemStack hand = e.getCursor();

		UUID u = p.getUniqueId();

		if (!invs.containsKey(u)) {
			return;
		}

		GUIInventory ginv = invs.get(u);

		if (!ginv.inv.equals(inv)) {
			return;
		}

		// CANCEL ANYTHING
		e.setCancelled(true);
		
		GUIItem gitem = ginv.getGUIItem(e.getSlot());
		
		if (gitem == null) {
			return;
		}
		
		if (e.isRightClick()) {
			gitem.onRightClick(p, inv, hand);
		}
		if (e.isLeftClick()) {
			gitem.onLeftClick(p, inv, hand);
		}
	}

	@EventHandler
	public void onClose(InventoryCloseEvent e) {
		Player p = (Player) e.getPlayer();
		Inventory inv = e.getInventory();

		UUID u = p.getUniqueId();

		if (!invs.containsKey(u)) {
			return;
		}

		GUIInventory ginv = invs.get(u);

		if (!ginv.inv.equals(inv)) {
			return;
		}

		if (isPersistent()) {
			return;
		}

		invs.remove(u);
	}

}