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//
//  ========================================================================
//  Copyright (c) 1995-2012 Mort Bay Consulting Pty. Ltd.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================
//

package org.eclipse.jetty.websocket;

import java.io.IOException;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import javax.servlet.http.HttpServletRequest;

import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.handler.ResourceHandler;
import org.eclipse.jetty.server.nio.SelectChannelConnector;
import org.eclipse.jetty.util.StringUtil;
import org.eclipse.jetty.util.TypeUtil;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;

public class TestServer extends Server
{
    private static final Logger LOG = Log.getLogger(TestServer.class);

    boolean _verbose;

    WebSocket _websocket;
    SelectChannelConnector _connector;
    WebSocketHandler _wsHandler;
    ResourceHandler _rHandler;
    ConcurrentLinkedQueue<TestWebSocket> _broadcast = new ConcurrentLinkedQueue<TestWebSocket>();

    public TestServer(int port)
    {
        _connector = new SelectChannelConnector();
        _connector.setPort(port);

        addConnector(_connector);
        _wsHandler = new WebSocketHandler()
        {
            public WebSocket doWebSocketConnect(HttpServletRequest request, String protocol)
            {
                if ("org.ietf.websocket.test-echo".equals(protocol) || "echo".equals(protocol) || "lws-mirror-protocol".equals(protocol))
                {
                    _websocket = new TestEchoWebSocket();        
                }
                else if ("org.ietf.websocket.test-echo-broadcast".equals(protocol) || "echo-broadcast".equals(protocol))
                {
                    _websocket = new TestEchoBroadcastWebSocket(); 
                }
                else if ("echo-broadcast-ping".equals(protocol))
                {
                    _websocket = new TestEchoBroadcastPingWebSocket();        
                }
                else if ("org.ietf.websocket.test-echo-assemble".equals(protocol) || "echo-assemble".equals(protocol))
                {
                    _websocket = new TestEchoAssembleWebSocket();
                }
                else if ("org.ietf.websocket.test-echo-fragment".equals(protocol) || "echo-fragment".equals(protocol))
                {
                    _websocket = new TestEchoFragmentWebSocket();
                }
                else if (protocol==null)
                {
                    _websocket = new TestWebSocket(); 
                }
                return _websocket;
            }
        };

        setHandler(_wsHandler);
        
        _rHandler=new ResourceHandler();
        _rHandler.setDirectoriesListed(true);
        _rHandler.setResourceBase("src/test/webapp");
        _wsHandler.setHandler(_rHandler);
   
    }

    /* ------------------------------------------------------------ */
    public boolean isVerbose()
    {
        return _verbose;
    }

    /* ------------------------------------------------------------ */
    public void setVerbose(boolean verbose)
    {
        _verbose = verbose;
    }

    /* ------------------------------------------------------------ */
    public void setResourceBase(String dir)
    {
        _rHandler.setResourceBase(dir);
    }

    /* ------------------------------------------------------------ */
    public String getResourceBase()
    {
        return _rHandler.getResourceBase();
    }
    
    /* ------------------------------------------------------------ */
    /* ------------------------------------------------------------ */
    class TestWebSocket implements WebSocket, WebSocket.OnFrame, WebSocket.OnBinaryMessage, WebSocket.OnTextMessage, WebSocket.OnControl
    {
        protected FrameConnection _connection;
        
        public FrameConnection getConnection()
        {
            return _connection;
        }
        
        public void onOpen(Connection connection)
        {
            if (_verbose)
                System.err.printf("%s#onOpen %s %s\n",this.getClass().getSimpleName(),connection,connection.getProtocol());
        }
        
        public void onHandshake(FrameConnection connection)
        {
            if (_verbose)
                System.err.printf("%s#onHandshake %s %s\n",this.getClass().getSimpleName(),connection,connection.getClass().getSimpleName());
            _connection = connection;
        }

        public void onClose(int code,String message)
        {
            if (_verbose)
                System.err.printf("%s#onDisonnect %d %s\n",this.getClass().getSimpleName(),code,message);
        }
        
        public boolean onFrame(byte flags, byte opcode, byte[] data, int offset, int length)
        {            
            if (_verbose)
                System.err.printf("%s#onFrame %s|%s %s\n",this.getClass().getSimpleName(),TypeUtil.toHexString(flags),TypeUtil.toHexString(opcode),TypeUtil.toHexString(data,offset,length));
            return false;
        }

        public boolean onControl(byte controlCode, byte[] data, int offset, int length)
        {
            if (_verbose)
                System.err.printf("%s#onControl  %s %s\n",this.getClass().getSimpleName(),TypeUtil.toHexString(controlCode),TypeUtil.toHexString(data,offset,length));            
            return false;
        }

        public void onMessage(String data)
        {
            if (_verbose)
                System.err.printf("%s#onMessage     %s\n",this.getClass().getSimpleName(),data);
        }

        public void onMessage(byte[] data, int offset, int length)
        {
            if (_verbose)
                System.err.printf("%s#onMessage     %s\n",this.getClass().getSimpleName(),TypeUtil.toHexString(data,offset,length));
        }
    }
    
    /* ------------------------------------------------------------ */
    /* ------------------------------------------------------------ */
    class TestEchoWebSocket extends TestWebSocket 
    {
        @Override
        public void onOpen(Connection connection)
        {
            super.onOpen(connection);
            connection.setMaxTextMessageSize(-1);
            connection.setMaxBinaryMessageSize(-1);
        }
        
        @Override
        public boolean onFrame(byte flags, byte opcode, byte[] data, int offset, int length)
        {
            super.onFrame(flags,opcode,data,offset,length);
            try
            {
                if (!getConnection().isControl(opcode))
                    getConnection().sendFrame(flags,opcode,data,offset,length);             
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
            
            return false;
        }
    }
    
    /* ------------------------------------------------------------ */
    /* ------------------------------------------------------------ */
    class TestEchoBroadcastPingWebSocket extends TestEchoBroadcastWebSocket 
    {
        Thread _keepAlive; // A dedicated thread is not a good way to do this
        CountDownLatch _latch = new CountDownLatch(1);
        
        @Override
        public void onHandshake(final FrameConnection connection)
        {
            super.onHandshake(connection);
            _keepAlive=new Thread()
            {
                @Override
                public void run()
                {
                    try
                    {
                        while(!_latch.await(10,TimeUnit.SECONDS))
                        {
                            System.err.println("Ping "+connection);
                            byte[] data = { (byte)1, (byte) 2, (byte) 3 };
                            connection.sendControl(WebSocketConnectionRFC6455.OP_PING,data,0,data.length);
                        }
                    }
                    catch (Exception e)
                    {
                        e.printStackTrace();
                    }
                }
            };
            _keepAlive.start();
        }


        @Override
        public boolean onControl(byte controlCode, byte[] data, int offset, int length)
        {
            if (controlCode==WebSocketConnectionRFC6455.OP_PONG)
                System.err.println("Pong "+getConnection());
            return super.onControl(controlCode,data,offset,length);
        }


        @Override
        public void onClose(int code, String message)
        {
            _latch.countDown();
            super.onClose(code,message);
        }
        
        
    }
    
    
    /* ------------------------------------------------------------ */
    /* ------------------------------------------------------------ */
    class TestEchoBroadcastWebSocket extends TestWebSocket
    {
        @Override
        public void onOpen(Connection connection)
        {
            super.onOpen(connection);
            _broadcast.add(this);
        }

        @Override
        public void onClose(int code,String message)
        {
            super.onClose(code,message);
            _broadcast.remove(this);
        }
        
        @Override
        public void onMessage(byte[] data, int offset, int length)
        {
            super.onMessage(data,offset,length);
            for (TestWebSocket ws : _broadcast)
            {
                try
                {
                    ws.getConnection().sendMessage(data,offset,length); 
                }
                catch (IOException e)
                {
                    _broadcast.remove(ws);
                    e.printStackTrace();
                }
            }
        }

        @Override
        public void onMessage(final String data)
        {
            super.onMessage(data);
            for (TestWebSocket ws : _broadcast)
            {
                try
                {
                    ws.getConnection().sendMessage(data); 
                }
                catch (IOException e)
                {
                    _broadcast.remove(ws);
                    e.printStackTrace();
                }
            }
        }
    }
    
    /* ------------------------------------------------------------ */
    /* ------------------------------------------------------------ */
    class TestEchoAssembleWebSocket extends TestWebSocket
    {
        
        @Override
        public void onOpen(Connection connection)
        {
            super.onOpen(connection);
            connection.setMaxTextMessageSize(64*1024);
            connection.setMaxBinaryMessageSize(64*1024);
        }

        @Override
        public void onMessage(byte[] data, int offset, int length)
        {
            super.onMessage(data,offset,length);
            try
            {
                getConnection().sendMessage(data,offset,length); 
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
        }

        @Override
        public void onMessage(final String data)
        {
            super.onMessage(data);
            try
            {
                getConnection().sendMessage(data); 
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
        }
    }
    
    /* ------------------------------------------------------------ */
    /* ------------------------------------------------------------ */
    class TestEchoFragmentWebSocket extends TestWebSocket
    {
        @Override
        public void onOpen(Connection connection)
        {
            super.onOpen(connection);
            connection.setMaxTextMessageSize(64*1024);
            connection.setMaxBinaryMessageSize(64*1024);
        }

        @Override
        public void onMessage(byte[] data, int offset, int length)
        {
            super.onMessage(data,offset,length);
            try
            {
                getConnection().sendFrame((byte)0x0,getConnection().binaryOpcode(),data,offset,length/2); 
                getConnection().sendFrame((byte)0x8,getConnection().binaryOpcode(),data,offset+length/2,length-length/2); 
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
        }

        @Override
        public void onMessage(final String message)
        {
            super.onMessage(message);
            try
            {
                byte[] data = message.getBytes(StringUtil.__UTF8);
                int offset=0;
                int length=data.length;
                getConnection().sendFrame((byte)0x0,getConnection().textOpcode(),data,offset,length/2); 
                getConnection().sendFrame((byte)0x8,getConnection().textOpcode(),data,offset+length/2,length-length/2); 
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
        }
    }

    private static void usage()
    {
        System.err.println("java -cp CLASSPATH "+TestServer.class+" [ OPTIONS ]");
        System.err.println("  -p|--port PORT    (default 8080)");
        System.err.println("  -v|--verbose ");
        System.err.println("  -d|--docroot file (default 'src/test/webapp')");
        System.exit(1);
    }
    
    public static void main(String... args)
    {
        try
        {
            int port=8080;
            boolean verbose=false;
            String docroot="src/test/webapp";
            
            for (int i=0;i<args.length;i++)
            {
                String a=args[i];
                if ("-p".equals(a)||"--port".equals(a))
                    port=Integer.parseInt(args[++i]);
                else if ("-v".equals(a)||"--verbose".equals(a))
                    verbose=true;
                else if ("-d".equals(a)||"--docroot".equals(a))
                    docroot=args[++i];
                else if (a.startsWith("-"))
                    usage();
            }
            
            
            TestServer server = new TestServer(port);
            server.setVerbose(verbose);
            server.setResourceBase(docroot);
            server.start();
            server.join();
        }
        catch (Exception e)
        {
            LOG.warn(e);
        }
    }


}

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