package com.entryrise.afkguard.antiafk.captcha;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.SplittableRandom;
import java.util.UUID;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.entity.HumanEntity;
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;
import com.entryrise.afkguard.mineutils.ItemBuilder;


public class CaptchaGUI implements Listener {

	public static List<Integer> filler = new ArrayList<Integer>();
	private static SplittableRandom sr = new SplittableRandom();
	
	// Fillers where selector items can stay;
	static {
		for (int i = 19; i < 26; i++) {
			filler.add(i);
		}
		for (int i = 28; i < 35; i++) {
			filler.add(i);
		}
		for (int i = 37; i < 44; i++) {
			filler.add(i);
		}

		filler.add(10);
		filler.add(11);
		filler.add(15);
		filler.add(16);
	}

	public static class CaptchaData {

		public CaptchaCategory category;
		public Material example;
		public Inventory inv;
		
		public int counter;

		public CaptchaData() {
			this.category = CaptchaCategory.getCategory(null);
			this.example = category.getRandom(null);
		}

	}

	public static Map<UUID, CaptchaData> invs = new HashMap<UUID, CaptchaData>();

	public static Inventory getInventory(Player p, int counter) {
		return getInventory(p.getUniqueId(), counter);
	}

	public static boolean existsAlready(Player p) {
		return existsAlready(p.getUniqueId());
	}

	public static boolean existsAlready(UUID u) {

		return invs.containsKey(u);
	}

	public static Inventory getInventory(UUID u, int counter) {
		if (existsAlready(u)) {
			return invs.get(u).inv;
		} else if (counter != -1) {
			return createInventory(u, counter);
		}
		
		return null;
	}

	private static Inventory createInventory(UUID u, int counter) {
		CaptchaData cd = new CaptchaData();

		Inventory inv = Bukkit.createInventory(null, 54, getTitle(cd.category.getName()));

		setBorders(inv);
		setRandomExample(inv, cd);
		setRandomAnswers(inv, cd);

		cd.inv = inv;
		cd.counter = counter;

		invs.put(u, cd);

		return inv;
	}

	public static String getTitle(String categoryname) {
		return ChatColor.translateAlternateColorCodes('&', Main.config.getString("settings.captcha.gui.title"))
				.replace("%category%", categoryname);
	}

	@EventHandler
	public void onInventoryClick(InventoryClickEvent e) {

		HumanEntity hm = e.getWhoClicked();

		if (!(hm instanceof Player)) {
			return;
		}

		Player p = (Player) hm;
		
		Inventory invent = e.getInventory();

		ItemStack itm = e.getCurrentItem();

		if (itm == null) {
			return;
		}

		if (!invs.containsKey(p.getUniqueId())) {
			return;
		}
		
		if (!invent.equals(invs.get(p.getUniqueId()).inv)) {
			return;
		}

		// Done checks to make sure it's a verify gui. We can now do the work required.
		int slot = e.getSlot();
		
		// Make sure you're not clicking anywhere except verify items.
		e.setCancelled(true);
		
		if (!filler.contains(slot)) {
			return;
		}
		
		Main.captchaResult(p, itm.getType());

	}
	
	@EventHandler
	public void onInventoryClose(InventoryCloseEvent e) {
		HumanEntity hm = e.getPlayer();
		
		if (!(hm instanceof Player)) {
			return;
		}

		Player p = (Player) hm;
		
		Inventory invent = e.getInventory();
		
		if (!invs.containsKey(p.getUniqueId())) {
			return;
		}

		if (!invent.equals(invs.get(p.getUniqueId()).inv)) {
			return;
		}
		
		Bukkit.getScheduler().runTaskLater(Main.p, () -> p.openInventory(CaptchaGUI.getInventory(p, -1)), 5);
	}

	public static void setBorders(Inventory inv) {
		ItemStack pane = new ItemBuilder(Main.config, "settings.captcha.gui.glass-pane").build();
		for (int i = 4; i <= 49; i += 9) {
			inv.setItem(i - 4, pane);
			inv.setItem(i + 4, pane);
		}

		for (int i = 1; i <= 7; i++) {
			inv.setItem(i, pane);
			inv.setItem(i + 45, pane);
		}

		inv.setItem(12, pane);
		inv.setItem(13, pane);
		inv.setItem(14, pane);
	}

	public static void setRandomExample(Inventory inv, CaptchaData cd) {
		ItemStack itm = new ItemBuilder(Main.config, "settings.captcha.gui.example").setType(cd.example.name()).build();
		inv.setItem(4, itm);
	}

	public static void setRandomAnswers(Inventory inv, CaptchaData cd) {
		List<Material> mats = cd.category.getShuffledFiller();

		for (int i = 0; i < filler.size(); i++) {
			Material mat = mats.get(i);
			int slot = filler.get(i);

			ItemStack itm = prepareItemStack(mat);
			inv.setItem(slot, itm);
		}
		
		inv.setItem(filler.get(sr.nextInt(filler.size())), prepareItemStack(cd.category.getRandom(cd.example)));
	}
	
	private static ItemStack prepareItemStack(Material mat) {
		ItemStack itm = new ItemBuilder(Main.config, "settings.captcha.gui.item").setType(mat.name()).build();
		return itm;
	}

}