package org.bukkit.command.defaults;

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

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

public class DefaultGameModeCommand extends VanillaCommand
{
	private static final List<String> GAMEMODE_NAMES = ImmutableList.of("adventure", "creative", "survival");

	public DefaultGameModeCommand()
	{
		super("defaultgamemode");
		this.description = "Set the default gamemode";
		this.usageMessage = "/defaultgamemode <mode>";
		this.setPermission("bukkit.command.defaultgamemode");
	}

	@Override
	public boolean execute(CommandSender sender, String commandLabel, String[] args)
	{
		if(!testPermission(sender)) return true;
		if(args.length == 0)
		{
			sender.sendMessage("Usage: " + usageMessage);
			return false;
		}

		String modeArg = args[0];
		int value = -1;

		try
		{
			value = Integer.parseInt(modeArg);
		} catch(NumberFormatException ex)
		{
		}

		GameMode mode = GameMode.getByValue(value);

		if(mode == null)
		{
			if(modeArg.equalsIgnoreCase("creative") || modeArg.equalsIgnoreCase("c"))
			{
				mode = GameMode.CREATIVE;
			}
			else if(modeArg.equalsIgnoreCase("adventure") || modeArg.equalsIgnoreCase("a"))
			{
				mode = GameMode.ADVENTURE;
			}
			else
			{
				mode = GameMode.SURVIVAL;
			}
		}

		Bukkit.getServer().setDefaultGameMode(mode);
		Command.broadcastCommandMessage(sender, "Default game mode set to " + mode.toString().toLowerCase());

		return true;
	}

	@Override
	public List<String> tabComplete(CommandSender sender, String alias, String[] args)
	{
		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 StringUtil.copyPartialMatches(args[0], GAMEMODE_NAMES, new ArrayList<String>(GAMEMODE_NAMES.size()));
		}

		return ImmutableList.of();
	}
}