package org.bukkit.command.defaults;

import com.google.common.collect.ImmutableList;
import org.apache.commons.lang.Validate;
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.util.StringUtil;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class ClearCommand extends VanillaCommand
{
	private static List<String> materials;

	static
	{
		ArrayList<String> materialList = new ArrayList<String>();
		for(Material material : Material.values())
		{
			materialList.add(material.name());
		}
		Collections.sort(materialList);
		materials = ImmutableList.copyOf(materialList);
	}

	public ClearCommand()
	{
		super("clear");
		this.description = "Clears the player's inventory. Can specify item and data filters too.";
		this.usageMessage = "/clear <player> [item] [data]";
		this.setPermission("bukkit.command.clear");
	}

	@Override
	public boolean execute(CommandSender sender, String currentAlias, String[] args)
	{
		if(!testPermission(sender)) return true;

		Player player = null;
		if(args.length > 0)
		{
			player = Bukkit.getPlayer(args[0]);
		}
		else if(sender instanceof Player)
		{
			player = (Player) sender;
		}

		if(player != null)
		{
			int id;

			if(args.length > 1 && !(args[1].equals("-1")))
			{
				Material material = Material.matchMaterial(args[1]);
				if(material == null)
				{
					sender.sendMessage(ChatColor.RED + "There's no item called " + args[1]);
					return false;
				}

				id = material.getId();
			}
			else
			{
				id = -1;
			}

			int data = args.length >= 3 ? getInteger(sender, args[2], 0) : -1;
			int count = player.getInventory().clear(id, data);

			Command.broadcastCommandMessage(sender, "Cleared the inventory of " + player.getDisplayName() + ", removing " + count + " items");
		}
		else if(args.length == 0)
		{
			sender.sendMessage(ChatColor.RED + "Please provide a player!");
		}
		else
		{
			sender.sendMessage(ChatColor.RED + "Can't find player " + args[0]);
		}

		return true;
	}

	@Override
	public List<String> tabComplete(CommandSender sender, String alias, String[] args) throws IllegalArgumentException
	{
		Validate.notNull(sender, "Sender cannot be null");
		Validate.notNull(args, "Arguments cannot be null");
		Validate.notNull(alias, "Alias cannot be null");

		if(args.length == 1)
		{
			return super.tabComplete(sender, alias, args);
		}
		if(args.length == 2)
		{
			final String arg = args[1];
			final List<String> materials = ClearCommand.materials;
			List<String> completion = null;

			final int size = materials.size();
			int i = Collections.binarySearch(materials, arg, String.CASE_INSENSITIVE_ORDER);

			if(i < 0)
			{
				// Insertion (start) index
				i = -1 - i;
			}

			for(; i < size; i++)
			{
				String material = materials.get(i);
				if(StringUtil.startsWithIgnoreCase(material, arg))
				{
					if(completion == null)
					{
						completion = new ArrayList<String>();
					}
					completion.add(material);
				}
				else
				{
					break;
				}
			}

			if(completion != null)
			{
				return completion;
			}
		}
		return ImmutableList.of();
	}
}