// ========================================================================
// Copyright (c) 2009-2009 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.client;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLDecoder;

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

import junit.framework.TestCase;

import org.eclipse.jetty.client.security.Realm;
import org.eclipse.jetty.client.security.SimpleRealmResolver;
import org.eclipse.jetty.http.HttpMethods;
import org.eclipse.jetty.http.HttpStatus;
import org.eclipse.jetty.io.ByteArrayBuffer;
import org.eclipse.jetty.io.EofException;
import org.eclipse.jetty.server.Handler;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.handler.AbstractHandler;
import org.eclipse.jetty.server.handler.HandlerCollection;
import org.eclipse.jetty.server.nio.SelectChannelConnector;
import org.eclipse.jetty.servlet.DefaultServlet;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;
import org.eclipse.jetty.util.IO;

public class ContentExchangeTest
    extends TestCase
{
    private static String _content =
        "Lorem ipsum dolor sit amet, consectetur adipiscing elit. In quis felis nunc. "+
        "Quisque suscipit mauris et ante auctor ornare rhoncus lacus aliquet. Pellentesque "+
        "habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. "+
        "Vestibulum sit amet felis augue, vel convallis dolor. Cras accumsan vehicula diam "+
        "at faucibus. Etiam in urna turpis, sed congue mi. Morbi et lorem eros. Donec vulputate "+
        "velit in risus suscipit lobortis. Aliquam id urna orci, nec sollicitudin ipsum. "+
        "Cras a orci turpis. Donec suscipit vulputate cursus. Mauris nunc tellus, fermentum "+
        "eu auctor ut, mollis at diam. Quisque porttitor ultrices metus, vitae tincidunt massa "+
        "sollicitudin a. Vivamus porttitor libero eget purus hendrerit cursus. Integer aliquam "+
        "consequat mauris quis luctus. Cras enim nibh, dignissim eu faucibus ac, mollis nec neque. "+
        "Aliquam purus mauris, consectetur nec convallis lacinia, porta sed ante. Suspendisse "+
        "et cursus magna. Donec orci enim, molestie a lobortis eu, imperdiet vitae neque.";

    private File _docRoot;
    private Server _server;
    private HttpClient _client;
    private Realm _realm;
    private String _protocol;
    private String _baseUrl;
    private String _requestContent;

    public void setUp()
        throws Exception
    {
        _docRoot = new File("target/test-output/docroot/");
        _docRoot.mkdirs();
        _docRoot.deleteOnExit();
        
        File content = new File(_docRoot,"input.txt");
        FileOutputStream out = new FileOutputStream(content);
        out.write(_content.getBytes("utf-8"));
        out.close();
        
        _server = new Server();
        configureServer(_server);
        _server.start();

        int port = _server.getConnectors()[0].getLocalPort();
        _baseUrl = _protocol+"://localhost:"+port+ "/";
    }
    
    public void tearDown()
        throws Exception
    {
        if (_server != null)
        {
            _server.stop();
            _server = null;
        }
    }
    
    public void testPut() throws Exception
    {
        startClient(_realm);
    
        ContentExchange putExchange = new ContentExchange();
        putExchange.setURL(getBaseUrl() + "output.txt");
        putExchange.setMethod(HttpMethods.PUT);
        putExchange.setRequestContent(new ByteArrayBuffer(_content.getBytes()));
    
        _client.send(putExchange);
        int state = putExchange.waitForDone();
    
        int responseStatus = putExchange.getResponseStatus();
    
        stopClient();
    
        boolean statusOk = (responseStatus == 200 || responseStatus == 201);
        assertTrue(statusOk);
        
        String content = IO.toString(new FileInputStream(new File(_docRoot,"output.txt")));
        assertEquals(_content,content);
    }
    
    public void testGet() throws Exception
    {
        startClient(_realm);
    
        ContentExchange getExchange = new ContentExchange();
        getExchange.setURL(getBaseUrl() + "input.txt");
        getExchange.setMethod(HttpMethods.GET);
    
        _client.send(getExchange);
        int state = getExchange.waitForDone();
    
        String content = "";
        int responseStatus = getExchange.getResponseStatus();
        if (responseStatus == HttpStatus.OK_200)
        {
            content = getExchange.getResponseContent();
        }
    
        stopClient();
    
        assertEquals(HttpStatus.OK_200,responseStatus);
        assertEquals(_content,content);
    }
    
    public void testHead() throws Exception
    {
        startClient(_realm);
    
        ContentExchange getExchange = new ContentExchange();
        getExchange.setURL(getBaseUrl() + "input.txt");
        getExchange.setMethod(HttpMethods.HEAD);
    
        _client.send(getExchange);
        getExchange.waitForDone();
    
        int responseStatus = getExchange.getResponseStatus();

        stopClient();
    
        assertEquals(HttpStatus.OK_200,responseStatus);
    }
    
    public void testPost() throws Exception
    {
        startClient(_realm);
    
        ContentExchange postExchange = new ContentExchange();
        postExchange.setURL(getBaseUrl() + "test");
        postExchange.setMethod(HttpMethods.POST);
        postExchange.setRequestContent(new ByteArrayBuffer(_content.getBytes()));
   
        _client.send(postExchange);
        int state = postExchange.waitForDone();
    
        int responseStatus = postExchange.getResponseStatus();
 
        stopClient();
    
        assertEquals(HttpStatus.OK_200,responseStatus);
        assertEquals(_content,_requestContent);
    }
    
    protected void configureServer(Server server)
        throws Exception
    {
        setProtocol("http");
        
        SelectChannelConnector connector = new SelectChannelConnector();
        server.addConnector(connector);

        Handler handler = new TestHandler(getBasePath());
        
        ServletContextHandler root = new ServletContextHandler();
        root.setContextPath("/");
        root.setResourceBase(_docRoot.getAbsolutePath());
        ServletHolder servletHolder = new ServletHolder( new DefaultServlet() );
        servletHolder.setInitParameter( "gzip", "true" );
        root.addServlet( servletHolder, "/*" );    

        HandlerCollection handlers = new HandlerCollection();
        handlers.setHandlers(new Handler[]{handler, root});
        server.setHandler( handlers ); 

    }
    
    protected void startClient(Realm realm)
        throws Exception
    {
        _client = new HttpClient();
        _client.setConnectorType(HttpClient.CONNECTOR_SELECT_CHANNEL);
        if (realm != null)
            _client.setRealmResolver(new SimpleRealmResolver(realm));
        _client.start();
    }
    
    protected void stopClient()
        throws Exception
    {
        if (_client != null)
        {
            _client.stop();
            _client = null;
        }
    }
    
    protected String getBasePath()
    {
        return _docRoot.getAbsolutePath();
    }
    
    protected String getBaseUrl()
    {
        return _baseUrl;
    }
    
    protected HttpClient getClient()
    {
        return _client;
    }
    
    protected Realm getRealm()
    {
        return _realm;
    }
    
    protected String getContent()
    {
        return _content;
    }
    
    protected void setProtocol(String protocol)
    {
        _protocol = protocol;
    }
    
    protected void setRealm(Realm realm)
    {
        _realm = realm;
    }
    
    public static void copyStream(InputStream in, OutputStream out)
    {
        try
        {
            byte[] buffer=new byte[1024];
            int len;
            while ((len=in.read(buffer))>=0)
            {
                out.write(buffer,0,len);
            }
        }
        catch (EofException e)
        {
            System.err.println(e);
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
    }

    protected class TestHandler extends AbstractHandler {
        private final String resourcePath;

        public TestHandler(String repositoryPath) {
            this.resourcePath = repositoryPath;
        }

        public void handle(String target, Request baseRequest,
                HttpServletRequest request, HttpServletResponse response)
            throws IOException, ServletException
        {
            if (baseRequest.isHandled())
            {
                return;
            }

            OutputStream out = null;
            
            if (baseRequest.getMethod().equals("PUT"))
            {
            	baseRequest.setHandled(true);

            	File file = new File(resourcePath, URLDecoder.decode(request.getPathInfo()));
            	file.getParentFile().mkdirs();
            	file.deleteOnExit();
            
            	out = new FileOutputStream(file);

	            response.setStatus(HttpServletResponse.SC_CREATED);
            }
            
            if (baseRequest.getMethod().equals("POST"))
            {
            	baseRequest.setHandled(true);
            	out = new ByteArrayOutputStream();

	        response.setStatus(HttpServletResponse.SC_OK);
            }
            
            if (out != null)
            {
                ServletInputStream in = request.getInputStream();
	            try
	            {
	                copyStream( in, out );
	            }
	            finally
	            {
	                in.close();
	                out.close();
	            }
	            
	            if (!(out instanceof FileOutputStream))
	            	_requestContent = out.toString();
            }
            
        }
    }
}