package com.planet_ink.siplet.support;

import java.applet.*;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.net.*;
import java.nio.charset.Charset;
import java.util.*;
import java.util.Map.Entry;

import com.planet_ink.coffee_mud.Common.interfaces.Session;
import com.planet_ink.siplet.applet.Siplet;
import com.planet_ink.siplet.support.MiniJSON.JSONObject;
import com.planet_ink.siplet.support.MiniJSON.MJSONException;

/*
   Copyright 2000-2020 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.
*/
public class GMCP
{
	private final StringBuffer					jscriptBuffer	= new StringBuffer("");

	public GMCP()
	{
		super();
	}

	public int process(final StringBuffer buf, final int i, final Siplet applet, final boolean useExternal)
	{
		return 0;
	}

	public String getAnyJScript()
	{
		synchronized (jscriptBuffer)
		{
			if (jscriptBuffer.length() == 0)
				return "";
			final String s = jscriptBuffer.toString();
			jscriptBuffer.setLength(0);
			return s;
		}
	}

	public String gmcpReceive(final byte[] buffer)
	{
		final String s=new String(buffer, Charset.forName("US-ASCII"));
		final int x=s.indexOf(' ');
		if(x<0)
			return s;
		final String cmd = s.substring(0,x);
		final String jsonStr = s.substring(x+1).trim();
		if(cmd.equalsIgnoreCase("siplet.input"))
		{
			try
			{
				final MiniJSON.JSONObject obj=new MiniJSON().parseObject(jsonStr);
				final String title = obj.getCheckedString("title");
				final String data = obj.getCheckedString("text");
				synchronized (jscriptBuffer)
				{
					jscriptBuffer.append("retarget('" + MiniJSON.toJSONString(title) + "','"+MiniJSON.toJSONString(data)+"');");
				}
				return "";
			}
			catch (final MJSONException e)
			{
			}
		}
		return s;
	}

	public byte[] convertStringToGmcp(String data) throws MJSONException
	{
		try
		{
			data = data.trim();
			String cmd;
			String parms;
			final int x = data.indexOf(' ');
			if (x < 0)
			{
				cmd = data;
				parms = "";
			}
			else
			{
				cmd = data.substring(0, x).trim();
				parms = data.substring(x + 1).trim();
			}
			if (cmd.length() == 0)
				return new byte[0];
			if (parms.length() > 0)
			{
				final MiniJSON jsonParser = new MiniJSON();
				jsonParser.parseObject("{\"root\":" + parms + "}");
				// simple parse test.. should throw an exception
			}
			else
				parms = "{}";
			final ByteArrayOutputStream bout = new ByteArrayOutputStream();
			bout.write(TelnetFilter.IAC_);
			bout.write(TelnetFilter.IAC_SB);
			bout.write(TelnetFilter.IAC_GMCP);
			bout.write((cmd + " " + parms).getBytes("US-ASCII"));
			bout.write(TelnetFilter.IAC_);
			bout.write(TelnetFilter.IAC_SE);
			return bout.toByteArray();
		}
		catch (final Exception e)
		{
			return new byte[0];
		}
	}
}
