package mineplex.game.clans.items;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import mineplex.core.MiniPlugin;
import mineplex.core.account.CoreClientManager;
import mineplex.core.common.util.UtilServer;
import mineplex.core.packethandler.IPacketHandler;
import mineplex.core.packethandler.PacketHandler;
import mineplex.core.packethandler.PacketInfo;
import mineplex.core.portal.TransferHandler;
import mineplex.core.portal.Commands.SendCommand;
import mineplex.core.portal.Commands.ServerCommand;
import mineplex.game.clans.items.attributes.ItemAttribute;
import mineplex.game.clans.items.attributes.weapon.FlamingAttribute;
import mineplex.game.clans.items.attributes.weapon.FrostedAttribute;
import mineplex.game.clans.items.attributes.weapon.SharpAttribute;
import mineplex.game.clans.items.commands.GearCommand;
import mineplex.game.clans.items.generation.Weight;
import mineplex.game.clans.items.generation.WeightSet;
import mineplex.game.clans.items.legendaries.AlligatorsTooth;
import mineplex.game.clans.items.legendaries.WindBlade;
import mineplex.game.clans.items.smelting.SmeltingListener;
import mineplex.serverdata.Region;
import mineplex.serverdata.Utility;
import mineplex.serverdata.commands.ServerCommandManager;
import mineplex.serverdata.commands.TransferCommand;
import mineplex.serverdata.serialization.RuntimeTypeAdapterFactory;
import mineplex.serverdata.servers.ServerManager;
import net.minecraft.server.v1_7_R4.Packet;
import net.minecraft.server.v1_7_R4.PacketPlayOutSetSlot;

import org.bukkit.Bukkit;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.plugin.java.JavaPlugin;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

/**
 * Manages creation and retrieval of associated {@link PlayerGear}s with online players, as well
 * as offering methods for parsing and handling {@link CustomItem}s.
 * @author MrTwiggy
 *
 */
public class GearManager extends MiniPlugin implements IPacketHandler
{
	private static final String ITEM_SERIALIZATION_TAG = "-JSON-";
	private static GearManager _instance;			// Singleton instance
	

	private Map<String, PlayerGear> playerGears;	// Mapping of player names (key) to cached gear set (value).
	private WeightSet<Integer> _attributeWeights;	// Weightings for randomly selecting number of attributes (1, 2, 3)
	private WeightSet<Boolean> _itemWeights;		// Weightings for randomly selecting item type (legendary/rare)
	private WeightSet<Boolean> _gearWeights;		// Weightings for randomly selecting gear type (armour/weapon)
	private static Gson _gson;
	
	public GearManager(JavaPlugin plugin, PacketHandler packetHandler)
	{
		super("CustomGear", plugin);
		
		_instance = this;
		
		playerGears = new HashMap<String, PlayerGear>();
		// TODO: Introduce configurable non-hardcoded values for generation weights?
		_attributeWeights = new WeightSet<Integer>(new Weight<Integer>(3, 3), new Weight<Integer>(20, 2), new Weight<Integer>(77, 1));
		_itemWeights = new WeightSet<Boolean>(new Weight<Boolean>(90, true), new Weight<Boolean>(10, false));
		_itemWeights = new WeightSet<Boolean>(new Weight<Boolean>(50, true), new Weight<Boolean>(50, false));
		
		System.out.println("-Testting-testing");
		System.out.println(Utility.currentTimeSeconds());
		
		// Register listeners
		UtilServer.getServer().getPluginManager().registerEvents(new ItemListener(), getPlugin());
		UtilServer.getServer().getPluginManager().registerEvents(new SmeltingListener(), getPlugin());
		
		// adding all different container classes with their flag
		RuntimeTypeAdapterFactory<ItemAttribute> typeFactory = RuntimeTypeAdapterFactory
				.of(ItemAttribute.class, "AttributeType")
				.registerSubtype(SharpAttribute.class)
				.registerSubtype(FrostedAttribute.class)
				.registerSubtype(FlamingAttribute.class);			// TODO: Register all item attributes automatically
		
		RuntimeTypeAdapterFactory<CustomItem> customItemType = RuntimeTypeAdapterFactory
				.of(CustomItem.class, "ItemType")
				.registerSubtype(AlligatorsTooth.class)
				.registerSubtype(WindBlade.class); // TODO: Register all legendary weapons automatically
		
		GsonBuilder builder = new GsonBuilder();
		builder.registerTypeAdapterFactory(typeFactory);
		builder.registerTypeAdapterFactory(customItemType);
		_gson = builder.create();

		packetHandler.addPacketHandler(this);
	}
	
	@Override
	public void addCommands()
	{
		addCommand(new GearCommand(this));
	}
	
	/**
	 * @param player - the player whose {@link PlayerGear} set is to be fetched.
	 * @return the cached or newly instantiated {@link PlayerGear} associated with {@code player}.
	 */
	public PlayerGear getPlayerGear(Player player)
	{
		String playerName = player.getName();
		if (!playerGears.containsKey(playerName))
		{
			PlayerGear gear = new PlayerGear(playerName);
			playerGears.put(playerName, gear);
		}
		
		return playerGears.get(playerName);
	}
	
	public CustomItem generateItem()
	{
		int attributeCount = _attributeWeights.generateRandom();
		boolean isLegendary = _itemWeights.generateRandom();
		boolean isArmour = _gearWeights.generateRandom();
		
		// TODO: Generate custom item randomly using generated values above
		
		return null;
	}
	
	public static CustomItem parseItem(ItemStack item)
	{
		String serialization = getItemSerialization(item);
		
		if (serialization != null)
		{
			CustomItem customItem = deserialize(serialization);
			return customItem;
		}
		
		return null;	// No serialization found in item's lore, not a custom item!
	}
	
	public static boolean isCustomItem(ItemStack item)
	{
		return getItemSerialization(item) != null;
	}
	
	public static String getItemSerialization(CustomItem customItem)
	{
		String tempSeri = serialize(customItem);
		String serialization = ITEM_SERIALIZATION_TAG;
		
		for (int i = 0; i < tempSeri.length(); i++)
		{
			if (i % 40 == 39)
			{
				serialization += "\n";
			}
			
			serialization += tempSeri.charAt(i);
		}
		
		return serialization;
	}
	
	private static String getItemSerialization(ItemStack item)
	{
		if (item == null || item.getItemMeta() == null
				|| item.getItemMeta().getLore() == null) return null;
		
		ItemMeta meta = item.getItemMeta();
		
		/*for (String lore : meta.getLore())
		{
			if (lore.startsWith(ITEM_SERIALIZATION_TAG))	// Found serialization lore-line
			{
				int tagLength = ITEM_SERIALIZATION_TAG.length();
				String serialization = lore.substring(tagLength);
				
				return serialization;
			}
		}*/
		
		// TODO: Implement packet intercepting to hide json encoded lore
		List<String> lore = meta.getLore();
		boolean serialized = false;
		String serialization = "";
		for (int i = 0; i < lore.size(); i++)
		{
			String line = lore.get(i);
			
			if (line.startsWith(ITEM_SERIALIZATION_TAG))
			{
				serialized = true;
				serialization += line.substring(ITEM_SERIALIZATION_TAG.length());
			}
			else if (serialized)
			{
				serialization += line;
			}
		}
		
		if (serialized)
		{
			return serialization;
		}
		
		return null;	// Unable to find any serialized lore lines, hence not a CustomItem.
	}
	
	public static String serialize(CustomItem customItem)
	{
		return _gson.toJson(customItem);
	}
	
	public static CustomItem deserialize(String serialization)
	{
		System.out.println("Serialization: " + serialization);
		return _gson.fromJson(serialization, CustomItem.class);
	}
	
	/**
	 * @return singleton instance of {@link GearManager}.
	 */
	public static GearManager getInstane()
	{
		return _instance;
	}

	@Override
	public void handle(PacketInfo packetInfo)
	{
		Packet packet = packetInfo.getPacket();
		
		if (packet instanceof PacketPlayOutSetSlot)
		{
			System.out.println("Item slot packet!");
			PacketPlayOutSetSlot slotPacket = (PacketPlayOutSetSlot) packet;
			
			
		}
	}
}