package mineplex.game.clans.items;

import java.util.HashSet;
import java.util.Set;

import mineplex.game.clans.items.legendaries.LegendaryItem;
import mineplex.minecraft.game.core.damage.CustomDamageEvent;

import org.bukkit.Bukkit;
import org.bukkit.entity.Player;
import org.bukkit.event.entity.EntityDamageByEntityEvent;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.event.player.PlayerItemHeldEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.PlayerInventory;

/**
 * PlayerGear caches and manages a players set of {@link CustomItem}s that
 * they currently wield.
 * @author MrTwiggy
 *
 */
public class PlayerGear
{
	private String _playerName;	// Name of player who owns the gear
	public String getPlayerName() { return _playerName; }
	
	// Cached custom item information for player's gear
	private CustomItem weapon;
	private CustomItem helmet;
	private CustomItem chestplate;
	private CustomItem leggings;
	private CustomItem boots;
	
	/**
	 * Class constructor
	 * @param playerName
	 */
	public PlayerGear(String playerName)
	{
		_playerName = playerName;
	}

	/**
	 * Tick & update internal logic for the PlayerGear and required custom items that are
	 * equipped.
	 */
	public void update()
	{
		if (isOnline())
		{
			CustomItem item = getWeapon();
			
			if (item != null && item instanceof LegendaryItem)
			{
				LegendaryItem legendary = (LegendaryItem) item;
				legendary.update(getPlayer());
			}
		}
	}
	
	public boolean isOnline()
	{
		Player player = getPlayer();
		return player != null && player.isOnline();
	}
	
	/**
	 * @return the {@link Player} that owns this gear set.
	 */
	public Player getPlayer()
	{
		return Bukkit.getPlayer(_playerName);
	}
	
	/**
	 * @return the {@link PlayerInventory} associated with the owner of this {@link PlayerGear}.
	 */
	public PlayerInventory getInventory()
	{
		return getPlayer().getInventory();
	}
	
	/**
	 * Trigger interact events for the set of equipped {@link CustomItem}s in gear set.
	 * @param event - the triggering interact event
	 */
	public void onInteract(PlayerInteractEvent event)
	{
		for (CustomItem item : getGear())
		{
			item.onInteract(event);
		}
	}
	
	/**
	 * Trigger on-attack events for the set of equipped {@link CustomItem}s in gear set.
	 * @param event - the triggering on-attack event
	 */
	public void onAttack(CustomDamageEvent event)
	{
		for (CustomItem item : getGear())
		{
			item.onAttack(event);
		}
	}
	
	/**
	 * Trigger attacked events for the set of equipped {@link CustomItem}s in gear set.
	 * @param event - the triggering attacked event
	 */
	public void onAttacked(CustomDamageEvent event)
	{
		for (CustomItem item : getGear())
		{
			item.onAttacked(event);
		}
	}
	
	/**
	 * Update appropriate gear status and item lores.
	 * @param event - the triggering item held change event.
	 */
	public void onItemHeldChanged(PlayerItemHeldEvent event)
	{		
		ItemStack item = getPlayer().getItemInHand();
		CustomItem weapon = getWeapon();
		
		if (weapon != null)
		{
			weapon.update(item);	// Update held-item's stats.	
		}
	}
	
	public CustomItem getWeapon()
	{
		ItemStack weaponItem = getPlayer().getInventory().getItemInHand();
		
		if (!itemsMatch(weapon, weaponItem))
		{
			weapon = parseItem(weaponItem);
		}
		
		return weapon;
	}
	
	public CustomItem getHelmet()
	{
		ItemStack helmetItem = getPlayer().getInventory().getHelmet();
		
		if (!itemsMatch(helmet, helmetItem))
		{
			helmet = parseItem(helmetItem);
		}
		
		return helmet;
	}
	
	public CustomItem getChestplate()
	{
		ItemStack chestplateItem = getPlayer().getInventory().getChestplate();
		
		if (!itemsMatch(chestplate, chestplateItem))
		{
			chestplate = parseItem(chestplateItem);
		}
		
		return chestplate;
	}
	
	public CustomItem getLeggings()
	{
		ItemStack leggingsItem = getPlayer().getInventory().getLeggings();
		
		if (!itemsMatch(leggings, leggingsItem))
		{
			leggings = parseItem(leggingsItem);
		}
		
		return leggings;
	}
	
	public CustomItem getBoots()
	{
		ItemStack bootsItem = getPlayer().getInventory().getBoots();
		
		if (!itemsMatch(boots, bootsItem))
		{
			boots = parseItem(bootsItem);
		}
		
		return boots;
	}
	
	/**
	 * @return set of currently equipped {@link CustomItem}s in the gear set.
	 */
	public Set<CustomItem> getGear()
	{
		Set<CustomItem> items = new HashSet<CustomItem>();
		if (getWeapon() != null) items.add(getWeapon());
		if (getHelmet() != null) items.add(getHelmet());
		if (getChestplate() != null) items.add(getChestplate());
		if (getLeggings() != null) items.add(getLeggings());
		if (getBoots() != null) items.add(getBoots());
		
		return items;
	}
	
	private boolean itemsMatch(CustomItem customItem, ItemStack item)
	{
		if (customItem == null || item == null) return false;
		
		if (GearManager.isCustomItem(item))
		{
			CustomItem customItem2 = GearManager.parseItem(item);
			return customItem2.matches(customItem);
		}
		
		return false;
	}
	
	private CustomItem parseItem(ItemStack item)
	{
		return GearManager.parseItem(item);
	}
}