/*******************************************************************************
 * Copyright (c) 2008 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - Initial API and implementation
 *******************************************************************************/
package org.eclipse.wst.server.preview.internal;

import java.io.IOException;
import java.io.OutputStream;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.mortbay.jetty.HttpConnection;
import org.mortbay.jetty.MimeTypes;
import org.mortbay.jetty.Request;
import org.mortbay.jetty.handler.AbstractHandler;
import org.mortbay.util.ByteArrayISO8859Writer;
import org.mortbay.util.StringUtil;

public class WTPDefaultHandler extends AbstractHandler {
	protected int port;
	protected Module[] modules;

	public WTPDefaultHandler(int port, Module[] modules) {
		this.port = port;
		this.modules = modules;
	}

	public void handle(String target, HttpServletRequest request, HttpServletResponse response,
			int dispatch) throws IOException, ServletException {
		Request base_request = request instanceof Request?(Request)request:HttpConnection.getCurrentConnection().getRequest();
		
		if (response.isCommitted() || base_request.isHandled())
			return;
		base_request.setHandled(true);
		
		response.setStatus(HttpServletResponse.SC_NOT_FOUND);
		response.setContentType(MimeTypes.TEXT_HTML);
		
		ByteArrayISO8859Writer writer = new ByteArrayISO8859Writer(1500);
		
		String uri = request.getRequestURI();
		uri = StringUtil.replace(uri, "<", "&lt;");
		uri = StringUtil.replace(uri, ">", "&gt;");
		
		writer.write("<HTML>\n<HEAD>\n<TITLE>Error 404 - Not Found");
		writer.write("</TITLE>\n<BODY>\n<H2>Error 404 - Not Found</H2>\n");
		writer.write("No context on this server matched or handled this request.<BR>");
		writer.write("Contexts known to this server are: <ul>");
		
		for (Module module : modules) {
			writer.write("<li>");
			writer.write(module.getName());
			writer.write("(<a href=\"http://localhost:" + port + module.getContext() + "\">");
			writer.write(module.getContext());
			writer.write("</a>)</li>");
		}
		
		for (int i = 0; i < 10; i++)
			writer.write("\n<!-- Padding for IE                  -->");
		
		writer.write("\n</BODY>\n</HTML>\n");
		writer.flush();
		response.setContentLength(writer.size());
		OutputStream out = response.getOutputStream();
		writer.writeTo(out);
		out.close();
	}
}