package mineplex.game.clans.items;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.UUID;

import mineplex.game.clans.items.attributes.ItemAttribute;

import org.bukkit.Material;
import org.bukkit.event.entity.EntityDamageByEntityEvent;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;

/**
 * Represents a customizable wrapper for an {@link ItemStack}, enabling the possession
 * of special abilities, attributes, and triggers on item.
 * @author MrTwiggy
 *
 */
public class CustomItem 
{

	private ItemAttribute _superPrefix;
	public void setSuperPrefix(ItemAttribute attribute) { _superPrefix = attribute; }
	
	private ItemAttribute _prefix;
	public void setPrefix(ItemAttribute attribute) { _prefix = attribute; }
	
	private ItemAttribute _suffix;
	public void setSuffix(ItemAttribute attribute) { _suffix = attribute; }
	
	private String _displayName;
	private String _description;
	private Material _material;
	
	private String _uuid;	
	public String getUuid() { return _uuid; }
	
	public CustomItem(String displayName, String description, Material material)
	{
		_displayName = displayName;
		_description = description;
		_material = material;
		_uuid = UUID.randomUUID().toString();
	}
	
	public CustomItem(Material material)
	{
		this(material.toString(), null, material);	// TODO: Prettify item materal name
	}
	
	/**
	 * @return the name displayed to players for the item.
	 */
	public String getDisplayName()
	{
		// Concatenate attribute prefixes/suffixes to display name.
		String display = _displayName;
		
		if (_prefix != null)
		{
			display = _prefix.getDisplayName() + " " + display;
		}
		
		if (_superPrefix != null)
		{
			display = _superPrefix.getDisplayName() + " " + display;
		}
		
		if (_suffix != null)
		{
			display += " of " + _suffix.getDisplayName();
		}
		
		return display;
	}
	
	public List<String> getLore()
	{
		String serialization = GearManager.getItemSerialization(this);
		
		List<String> lore = new ArrayList<String>();
		
		if (_description != null)
		{
			lore.add(_description);
		}
		
		// Display attribute descriptions and stats in lore
		for (ItemAttribute attribute : getAttributes())
		{
			String attributeLine = attribute.getDisplayName() + " - " + attribute.getDescription();
			lore.add(attributeLine);
		}
		
		// Tack on serialized JSON encoded line for utility purposes. (Not seen by user)
		List<String> serializedLines = new ArrayList<String>();
		String[] seri = serialization.split("\n");
		for (String line : seri)
		{
			serializedLines.add(line);
		}
		lore.addAll(serializedLines);
		
		return lore;
	}
	
	public ItemStack toItemStack(int amount)
	{
		ItemStack item = new ItemStack(_material, amount);
		update(item);
		
		// TODO: Add non-descript enchantment for glowing efect?
		return item;
	}
	
	public void onInteract(PlayerInteractEvent event)
	{
		System.out.println("Triggered interact!");
		for (ItemAttribute attribute : getAttributes())
		{
			attribute.onInteract(event);
		}
	}
	
	public void onAttack(EntityDamageByEntityEvent event)
	{
		System.out.println("Triggered attack!");
		for (ItemAttribute attribute : getAttributes())
		{
			attribute.onAttack(event);
		}
	}
	
	public void onAttacked(EntityDamageByEntityEvent event)
	{
		System.out.println("Triggered damage!");
		for (ItemAttribute attribute : getAttributes())
		{
			attribute.onAttacked(event);
		}
	}
	
	/**
	 * @return the (possibly empty) set of {@link ItemAttribute}s attached to this item.
	 */
	public Set<ItemAttribute> getAttributes()
	{
		Set<ItemAttribute> attributes = new HashSet<ItemAttribute>();
		if (_superPrefix != null) attributes.add(_superPrefix);
		if (_prefix != null) attributes.add(_prefix);
		if (_suffix != null) attributes.add(_suffix);
		return attributes;
	}
	
	/**
	 * @param item - the item to check for a matching link
	 * @return true, if {@code item} matches this CustomItem via UUID, false otherwise.
	 */
	public boolean matches(CustomItem item)
	{
		return item.getUuid().equals(_uuid);
	}

	/**
	 * Update {@code item} with the proper meta properties suited for this 
	 * {@link CustomItem}.
	 * @param item - the item whose meta properties are being updated to become a version of this updated custom item.
	 */
	public void update(ItemStack item)
	{
		ItemMeta meta = item.getItemMeta();
		
		String displayName = getDisplayName();
		List<String> lore = getLore();
		
		meta.setDisplayName(displayName);
		meta.setLore(lore);
		
		item.setItemMeta(meta);
	}
}