package org.bukkit.command.defaults;

import com.google.common.base.Joiner;
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.inventory.ItemStack;
import org.bukkit.util.StringUtil;

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

public class GiveCommand 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 GiveCommand()
	{
		super("give");
		this.description = "Gives the specified player a certain amount of items";
		this.usageMessage = "/give <player> <item> [amount [data]]";
		this.setPermission("bukkit.command.give");
	}

	@Override
	public boolean execute(CommandSender sender, String currentAlias, String[] args)
	{
		if(!testPermission(sender)) return true;
		if((args.length < 2))
		{
			sender.sendMessage(ChatColor.RED + "Usage: " + usageMessage);
			return false;
		}

		Player player = Bukkit.getPlayerExact(args[0]);

		if(player != null)
		{
			Material material = Material.matchMaterial(args[1]);

			if(material == null)
			{
				material = Bukkit.getUnsafe().getMaterialFromInternalName(args[1]);
			}

			if(material != null)
			{
				int amount = 1;
				short data = 0;

				if(args.length >= 3)
				{
					amount = this.getInteger(sender, args[2], 1, 64);

					if(args.length >= 4)
					{
						try
						{
							data = Short.parseShort(args[3]);
						} catch(NumberFormatException ex)
						{
						}
					}
				}

				ItemStack stack = new ItemStack(material, amount, data);

				if(args.length >= 5)
				{
					try
					{
						stack = Bukkit.getUnsafe().modifyItemStack(stack, Joiner.on(' ').join(Arrays.asList(args).subList(4, args.length)));
					} catch(Throwable t)
					{
						player.sendMessage("Not a valid tag");
						return true;
					}
				}

				player.getInventory().addItem(stack);

				Command.broadcastCommandMessage(sender, "Gave " + player.getName() + " some " + material.getId() + " (" + material + ")");
			}
			else
			{
				sender.sendMessage("There's no item called " + args[1]);
			}
		}
		else
		{
			sender.sendMessage("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 = GiveCommand.materials;
			List<String> completion = new ArrayList<String>();

			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))
				{
					completion.add(material);
				}
				else
				{
					break;
				}
			}

			return Bukkit.getUnsafe().tabCompleteInternalMaterialName(arg, completion);
		}
		return ImmutableList.of();
	}
}