package com.planet_ink.coffee_mud.core.intermud.cm1;
import com.planet_ink.coffee_mud.core.interfaces.*;
import com.planet_ink.coffee_mud.core.*;
import com.planet_ink.coffee_mud.core.collections.*;
import com.planet_ink.coffee_mud.Abilities.interfaces.*;
import com.planet_ink.coffee_mud.Areas.interfaces.*;
import com.planet_ink.coffee_mud.Behaviors.interfaces.*;
import com.planet_ink.coffee_mud.CharClasses.interfaces.*;
import com.planet_ink.coffee_mud.Commands.interfaces.*;
import com.planet_ink.coffee_mud.Common.interfaces.*;
import com.planet_ink.coffee_mud.Exits.interfaces.*;
import com.planet_ink.coffee_mud.Items.interfaces.*;
import com.planet_ink.coffee_mud.Libraries.interfaces.*;
import com.planet_ink.coffee_mud.Locales.interfaces.*;
import com.planet_ink.coffee_mud.MOBS.interfaces.*;
import com.planet_ink.coffee_mud.Races.interfaces.*;
import com.planet_ink.coffee_mud.core.intermud.cm1.commands.*;
import java.util.*;
import java.net.*;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.channels.SocketChannel;
import java.nio.channels.spi.SelectorProvider;
import java.io.*;
import java.util.concurrent.atomic.*;

/*
   Copyright 2010-2020 Bo Zimmerman

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

	   http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
@SuppressWarnings("unchecked")
public class CommandHandler implements Runnable
{
	private String cmd;
	private String rest;
	private final RequestHandler req;

	private static final Map<String,Class<? extends CM1Command>> commandList=new Hashtable<String,Class<? extends CM1Command>>();

	private static final void AddCommand(final Class<? extends CM1Command> c) throws InstantiationException, IllegalAccessException
	{
		final CM1Command c1 = CM1Command.newInstance(c,null,"");
		commandList.put(c1.getCommandWord(),c);
	}

	static
	{
		String className=CommandHandler.class.getName();
		String packageName=className;
		int x=packageName.lastIndexOf('.');
		if(x>0)
			packageName=packageName.substring(0,x)+".commands.";
		if (!className.startsWith("/"))
			className = "/" + className;

		className = className.replace('.', '/');
		className = className + ".class";

		final URL classUrl = CommandHandler.class.getClass().getResource(className);
		if (classUrl != null)
		{
			String temp = classUrl.getFile();
			if (temp.startsWith("file:"))
			{
			  temp=temp.substring(5);
			}
			x=temp.lastIndexOf('/');
			if(x>0)
			{
				final File dir=new File(temp.substring(0,x)+"/commands");
				if((dir.exists())&&(dir.isDirectory()))
				{
					for(final File F : dir.listFiles())
					{
						if(F.getName().endsWith(".class")
						&&(!F.getName().equals("CM1Command.class"))
						&&(F.getName().indexOf('$')<0))
						{
							final String name=packageName + F.getName().substring(0,F.getName().length()-6);
							try
							{
								AddCommand((Class<? extends CM1Command>)CMClass.instance().loadClass(name,true));
							}
							catch(final Exception e)
							{
								e.printStackTrace();
							}
						}
					}
				}
			}
		}
	}

	public CommandHandler(final RequestHandler req, final String command)
	{
		this.req=req;
		final int x=command.indexOf(' ');
		if(x<0)
		{
			cmd=command;
			rest="";
		}
		else
		{
			cmd=command.substring(0,x).trim();
			rest=command.substring(x+1).trim();
		}
	}

	@Override
	public void run()
	{
		if(cmd.length()>0)
		{
			try
			{
				if(cmd.equalsIgnoreCase("HELP"))
				{
					if(rest.length()>0)
					{
						final Class<? extends CM1Command> commandClass = commandList.get(rest.toUpperCase().trim());
						final CM1Command command = CM1Command.newInstance(commandClass, req, rest);
						if((command == null) || (!command.passesSecurityCheck(req.getUser(), req.getTarget())))
							req.sendMsg("[FAIL UNKNOWN: "+rest.toUpperCase().trim()+"]");
						else
							req.sendMsg("[OK "+command.getCommandWord()+" "+command.getHelp(req.getUser(), req.getTarget(), rest)+"]");
					}
					else
					{
						final StringBuilder str=new StringBuilder("[OK HELP");
						for(final String cmdWord : commandList.keySet())
						{
							final Class<? extends CM1Command> commandClass = commandList.get(cmdWord);
							final CM1Command command = CM1Command.newInstance(commandClass, req, "");
							if(command.passesSecurityCheck(req.getUser(), req.getTarget()))
								str.append(" "+cmdWord);
						}
						str.append("]");
						req.sendMsg(str.toString());
					}
					return;
				}
				final Class<? extends CM1Command> commandClass = commandList.get(cmd.toUpperCase().trim());
				final CM1Command command = CM1Command.newInstance(commandClass, req, rest);
				if((command == null) || (!command.passesSecurityCheck(req.getUser(), req.getTarget())))
					req.sendMsg("[FAIL UNKNOWN "+cmd.toUpperCase().trim()+"]");
				else
					command.run();
			}
			catch(final java.io.IOException ioe)
			{
				req.close();
			}
		}
	}
}
