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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2007-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * only the GPL Version 2, indicate your decision by adding "[Contributor]
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 * Version 2] license."  If you don't indicate a single choice of license, a
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 */

package com.sun.grizzly.standalone.cometd;

import com.sun.grizzly.comet.CometAsyncFilter;
import com.sun.grizzly.arp.AsyncHandler;
import com.sun.grizzly.http.SelectorThread;
import com.sun.grizzly.http.servlet.ServletAdapter;
import com.sun.grizzly.arp.DefaultAsyncHandler;
import com.sun.grizzly.cometd.standalone.CometdAdapter;
import com.sun.grizzly.standalone.StandaloneMainUtil;
import com.sun.grizzly.tcp.Adapter;
import com.sun.grizzly.tcp.http11.GrizzlyAdapterChain;
import com.sun.grizzly.tcp.http11.GrizzlyResponse;
import com.sun.grizzly.util.ClassLoaderUtil;
import java.util.logging.Level;
import javax.servlet.Servlet;

/**
 * Basic startup class used when Grizzly standalone is used
 *
 * @author Jeanfrancois Arcand
 */
public class Cometd extends StandaloneMainUtil {
    static int port = 8080;
    
    private String applicationLoc;
    private String servletClassName;
    
    public Cometd() {
    }
    
    
    public static void main( String args[] ) throws Exception {       
        Cometd main = new Cometd();        
        main.start(args);
    }

    
    @Override
    public SelectorThread createSelectorThread(String[] args) throws Exception{
        SelectorThread st = super.createSelectorThread(args);
        st.setEnableAsyncExecution(true);
        st.setBufferResponse(false);    
        st.setFileCacheIsEnabled(false);
        st.setLargeFileCacheEnabled(false);
        AsyncHandler asyncHandler = new DefaultAsyncHandler();
        asyncHandler.addAsyncFilter(new CometAsyncFilter()); 
        st.setAsyncHandler(asyncHandler);
            
        SelectorThread.logger()
            .log(Level.INFO,"Enabling Grizzly Bayeux support.");
        return st;
    }   

    @Override
    public void printHelpAndExit() {
        System.err.println("Usage: " + Cometd.class.getCanonicalName() + " [options]");
        System.err.println();
        System.err.println("    -p, --port=port                  Runs Bayeux Protocol on the specified port.");
        System.err.println("                                     Default: 8080");
        System.err.println("    -a, --apps=application path      The static resourde folder or jar or war location.");
        System.err.println("                                     Default: .");
        System.err.println("    -h, --help                       Show this help message.");
        System.exit(1);  
    }

    
    @Override
    public boolean parseOptions(String[] args) {
        // parse options
        for (int i = 0; i < args.length - 1; i++) {
            String arg = args[i];
            
            if("-h".equals(arg) || "--help".equals(arg)) {
                printHelpAndExit();
            } else if("-a".equals(arg)) {
                i ++;
                applicationLoc = args[i];
            } else if(arg.startsWith("--application=")) {
                applicationLoc = arg.substring("--application=".length(), arg.length());
            } else if ("-p".equals(arg)) {
                i ++;
                setPort(args[i]);
            } else if (arg.startsWith("--port=")) {
                String num = arg.substring("--port=".length(), arg.length());
                setPort(num);
            }
        }
        
        if(applicationLoc == null) {
            System.err.println("Illegal War|Jar file or folder location.");
            printHelpAndExit();
        }
               
        if (args.length > 4){
            servletClassName = args[args.length - 1];
        }
        return true;
    }

    
    @Override
    public Adapter configureAdapter(SelectorThread st) {                 
        GrizzlyAdapterChain adapter = new GrizzlyAdapterChain();
        adapter.setHandleStaticResources(true);
        adapter.setRootFolder(st.getWebAppRootPath());
        adapter.setHandleStaticResources(true);
        
        if (servletClassName != null){
            ServletAdapter sa = new ServletAdapter(){
                @Override
                public void customizeErrorPage(GrizzlyResponse response,
                        String message, int errorCode){
                    // Just set the status to 404 so the next GrizzlyAdapter 
                    // in the chain will be invoked.
                    response.setStatus(404);
                }
            };
            Servlet servlet = (Servlet)ClassLoaderUtil.load(servletClassName);
            String urlName = servletClassName.substring(servletClassName.lastIndexOf(".")+1);
            System.out.println("INFO: ServletRequest will be serviced" +
                    " from http://host:port/"+ urlName);
            sa.setContextPath("/" + urlName + "/");

            if (servlet == null){
                throw new IllegalStateException("Invalid Servlet ClassName");
            } else {
                System.out.println("Launching Servlet: " + servlet.getClass().getName());
                sa.setServletInstance(servlet);
            }
            adapter.addGrizzlyAdapter(sa);
        }
        adapter.addGrizzlyAdapter(new CometdAdapter());      
        return adapter;
    }

    
    @Override
    public String parseApplicationLocation(String[] args) {
       return applicationLoc;
    }
   
}