/*******************************************************************************
 * Copyright (c) 2009, 2015 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.ua.tests.help.webapp;

import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

import junit.framework.TestCase;

import org.junit.Assert;

import org.eclipse.help.internal.server.WebappManager;

/**
 * Test to see if the help server is interruptable
 */

public class HelpServerInterrupt extends TestCase {
	
	private static boolean enableTimeout = true;
	private int iterations;
	private int sleepTime = 10; 
	private class ServerStarter extends Thread {
		
		private Exception exception = null;

		@Override
		public synchronized void run() {
			try {
				WebappManager.start("help");
			} catch (Exception e) {
				exception = e;
			}
		}

		public Exception getException() {
			return exception;
		}
	}

	@Override
	protected void setUp() throws Exception {
		super.setUp();
	}

	public void testServerWithoutInterrupt() throws Exception {
		WebappManager.stop("help");
		startServerWithoutInterrupt();
		checkServer();
		WebappManager.stop("help");
	}	
	
	public void testServerWithInterrupt() throws Exception {
		WebappManager.stop("help");
		startServerWithInterrupt();
		checkServer();
		WebappManager.stop("help");
	}	
	
	private void startServerWithoutInterrupt() throws Exception {
		ServerStarter starter = new ServerStarter();
		starter.start();
		// Now wait for the thread to complete
		iterations = 0;
		do {
			iterations++;
			if (enableTimeout && sleepTime * iterations > 10000) {
				fail("Test did not complete within 10 seconds");
			}	
			Thread.sleep(sleepTime);			
        } while (starter.isAlive());
		Exception exception = starter.getException();
		if (exception != null) {
			throw exception;
		}
	}
	
	private void startServerWithInterrupt() throws Exception {
		ServerStarter starter = new ServerStarter();
		starter.start();
		// Now wait for the thread to complete
		iterations = 0;
		do {
			iterations++;
			if (enableTimeout && sleepTime * iterations > 10000) {
				fail("Test did not complete within 10 seconds");
			}
			starter.interrupt();			
			Thread.sleep(sleepTime);			
        } while (starter.isAlive());
		Exception exception = starter.getException();
		if (exception != null) {
			throw exception;
		}
	}
	
	private void checkServer() throws Exception {
		InputStream input;
		long start = System.currentTimeMillis();
		try {
			int port = WebappManager.getPort();
			URL url = new URL("http", "localhost", port, "/help/index.jsp");	
			URLConnection connection = url.openConnection();
			setTimeout(connection, 5000);
			input = connection.getInputStream();
			int firstbyte = input.read();
			Assert.assertTrue(firstbyte > 0);
			input.close();
		} catch (Exception e) {
			long elapsed = System.currentTimeMillis() - start;
			System.out.println("Fail, milliseconds = " + elapsed);
			throw e;
		}
	}
	
	private static void setTimeout(URLConnection conn, int milliseconds) {
		conn.setConnectTimeout(milliseconds);
		conn.setReadTimeout(milliseconds);
	}
		
}