/*
 * The contents of this file are subject to the terms
 * of the Common Development and Distribution License
 * (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/CDDLv1.0.html or
 * glassfish/bootstrap/legal/CDDLv1.0.txt.
 * See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL
 * Header Notice in each file and include the License file
 * at glassfish/bootstrap/legal/CDDLv1.0.txt.
 * If applicable, add the following below the CDDL Header,
 * with the fields enclosed by brackets [] replaced by
 * you own identifying information:
 * "Portions Copyrighted [year] [name of copyright owner]"
 *
 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
 */

package com.sun.grizzly;

import com.sun.grizzly.filter.EchoFilter;
import com.sun.grizzly.filter.ReadFilter;
import com.sun.grizzly.utils.ControllerUtils;
import com.sun.grizzly.utils.TCPIOClient;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import junit.framework.TestCase;

/**
 * Tests a <code>BaseSelectionKeyHandler</code> configuration, (no keep alive).
 * 
 * @author charlie hunt
 */
public class BaseSelectionKeyHandlerTest extends TestCase {
    private static final int NUMBER_OF_ITERATIONS = 2;
    private static final int KEEP_ALIVE_TIMEOUT = 35 * 1000;
    private static final int PORT = 18888;
    
    public void testSimplePacket() throws IOException {
        // set up server side
        final Controller controller = new Controller();
        final TCPSelectorHandler selectorHandler = new TCPSelectorHandler();
        selectorHandler.setPort(PORT);
        selectorHandler.setSelectionKeyHandler(new BaseSelectionKeyHandler());
        controller.addSelectorHandler(selectorHandler);
        final ProtocolChainInstanceHandler pciHandler =
                new ProtocolChainInstanceHandler() {
            final private ProtocolChain protocolChain =
                                  new DefaultProtocolChain();
            public ProtocolChain poll() {
                return protocolChain;
            }
            public boolean offer(ProtocolChain pc) {
                return true;
            }
        };
        controller.setProtocolChainInstanceHandler(pciHandler);
        pciHandler.poll().addFilter(new ReadFilter());
        pciHandler.poll().addFilter(new EchoFilter());
        controller.setPipeline(new DefaultPipeline());
        controller.getPipeline().setMaxThreads(5);     
        // set up client side, start controller & run test
        List<TCPIOClient> clients = null;        
        try {
            final byte[] testData = makeDataToSend();
            ControllerUtils.startController(controller);
            clients = initializeClients("localhost", PORT, 2);
            for (int i = 0; i < NUMBER_OF_ITERATIONS; i++) {
                for (TCPIOClient client : clients) {
                    client.send(testData);
                    byte[] response = new byte[testData.length];
                    client.receive(response);
                    assertTrue(Arrays.equals(testData, response));
                }
            }
            Controller.logger().log(Level.INFO,
                    "Checking if keep alive is active ...");
            Controller.logger().log(Level.INFO, "Sorry, have to wait for (" + 
                    KEEP_ALIVE_TIMEOUT/1000 + ") " + "seconds ...");
            Thread.sleep(KEEP_ALIVE_TIMEOUT);
            Controller.logger().log(Level.INFO, 
                    "Clients attempting to send again ...");
            // Clients should still be connected, if not, then we have problem.
            try {
                for (int i = 0; i < NUMBER_OF_ITERATIONS; i++) {
                    for (TCPIOClient client : clients) {
                        client.send(testData);
                        byte[] response = new byte[testData.length];
                        client.receive(response);
                        assertTrue(Arrays.equals(testData, response));
                    }
                }
            Controller.logger().log(Level.INFO, 
                    "Keep alive not active as expected ...");
                assertTrue("Keep alive not active as expected ...", true);
            } catch (IOException ex) {
                assertTrue("Client reporting unexpected error: " + 
                           ex.toString(), false);
            }
        } catch (InterruptedException ex) {
            Logger.getLogger(BaseSelectionKeyHandlerTest.class.getName()).
                             log(Level.SEVERE, null, ex);
        } finally {
            if (clients != null) {
                closeClients(clients);
            }
            controller.stop();
        }
    }
    
    
    private List<TCPIOClient> initializeClients(String host, int port, 
                                                int count) throws IOException {
        final List<TCPIOClient> clients = new ArrayList<TCPIOClient>(count);
        for(int i=0; i<count; i++) {
            final TCPIOClient client = new TCPIOClient(host, port);
            client.connect();
            clients.add(client);
        }
        return clients;
    }
    
    private void closeClients(List<TCPIOClient> clients) {
        for(TCPIOClient client : clients) {
            try {
                client.close();
            } catch (IOException ex) {
                Logger.getLogger(BaseSelectionKeyHandlerTest.class.getName()).
                                 log(Level.SEVERE, null, ex);
            }
        }
    }

    private byte[] makeDataToSend() {
        final int TARGET_MSG_FACTOR = 12;  
        // total message length = TARGET_MSG_SIZE x msg.length x # of bytes per char
        final String msg = "Hello Grizzly, How is the bear today? ";
        final StringBuilder sb = new StringBuilder(msg.length()*TARGET_MSG_FACTOR );
        for (int i = 0; i < TARGET_MSG_FACTOR ; i++) {
            sb.append(msg);
        }
        return sb.toString().getBytes();
    }
}