/******************************************************************************* 
 * Copyright (c) 2016 Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is made available under the terms of the
 * Eclipse Public License v2.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Red Hat, Inc. - initial API and implementation
 ******************************************************************************/
package org.eclipse.wst.jsdt.integration.tests.nodejs;

import static org.junit.Assert.assertTrue;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.wst.jsdt.integration.tests.common.JSTTestBase;
import org.jboss.reddeer.common.exception.WaitTimeoutExpiredException;
import org.jboss.reddeer.common.matcher.RegexMatcher;
import org.jboss.reddeer.common.wait.TimePeriod;
import org.jboss.reddeer.common.wait.WaitUntil;
import org.jboss.reddeer.core.handler.ShellHandler;
import org.jboss.reddeer.eclipse.condition.ConsoleHasText;
import org.jboss.reddeer.eclipse.jdt.ui.ProjectExplorer;
import org.jboss.reddeer.eclipse.ui.console.ConsoleView;
import org.jboss.reddeer.eclipse.ui.perspectives.DebugPerspective;
import org.jboss.reddeer.requirements.openperspective.OpenPerspectiveRequirement.OpenPerspective;
import org.jboss.reddeer.swt.api.TreeItem;
import org.jboss.reddeer.swt.impl.tree.DefaultTree;
import org.jboss.reddeer.workbench.condition.EditorWithTitleIsActive;
import org.jboss.reddeer.workbench.impl.editor.TextEditor;
import org.jboss.reddeer.workbench.impl.view.WorkbenchView;
import org.eclipse.wst.jsdt.integration.tests.internal.condition.CursorPositionIsOnLine;
import org.eclipse.wst.jsdt.integration.tests.internal.condition.TreeContainsItem;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.ILaunchManager;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.core.Is.is;

/**
 * Tests for NodeJS Debugger
 * 
 * @author Pavol Srna
 *
 */
@OpenPerspective(DebugPerspective.class)
public class NodeJSDebuggerTest extends JSTTestBase {

	private static String TEST_APP_NAME = "jsdt-node-test-project";
	private static String IMPORT_PATH = "resources/" + TEST_APP_NAME;

	private static int BOOK_JS_BREAKPOINT_LINE = 4;

	private static String DEBUG_VARIABLE_EXPRESS = "express";
	private static String DEBUG_VARIABLE_PORT = "port";
	private static String DEBUG_VARIABLE_TITLE = "title";
	private static String DEBUG_VARIABLE_TITLE_VALUE = "\"Nineteen Eighty-Four\"";
	private static String DEBUG_VARIABLE_AUTHOR = "author";
	private static String DEBUG_VARIABLE_AUTHOR_VALUE = "\"George Orwell\"";

	private static int APP_PORT = 3000;
	private static int DEBUG_PORT = 5858;

	private static NodeJSLaunchListener launchListener = null;

	@BeforeClass
	public static void prepare() {
		/* PE is closed in Debug perspective, open it */
		new ProjectExplorer().open();
		importExistingProject(IMPORT_PATH);
		assertTrue(TEST_APP_NAME + " has not been imported!", new ProjectExplorer().containsProject(TEST_APP_NAME));
		npmInstall(TEST_APP_NAME);

	}

	@AfterClass
	public static void cleanup() {
		ShellHandler.getInstance().closeAllNonWorbenchShells();
		new ProjectExplorer().deleteAllProjects();
	}

	@Before
	public void debugAs() {
		assertTrue(portAvailable(APP_PORT));
		assertTrue(portAvailable(DEBUG_PORT));

		launchListener = new NodeJSLaunchListener();
		ILaunchManager manager = DebugPlugin.getDefault().getLaunchManager();
		manager.addLaunchListener(launchListener);

		debugAsNodeJSAppMenu(new ProjectExplorer().getProject(TEST_APP_NAME).getProjectItem("index.js")).select();

		new WorkbenchView("Debug").open();
		DefaultTree debugTree = new DefaultTree();
		new WaitUntil(new TreeContainsItem(debugTree, new RegexMatcher("\\(anonymous function\\)(.*)(index\\.js)(.*)")),
				TimePeriod.LONG);

		RegexMatcher matcher = new RegexMatcher("\\(anonymous function\\)(.*)(index\\.js)(.*)");
		doubleClickTreeItem(debugTree, matcher);

		ConsoleView console = new ConsoleView();
		console.open();
		new WaitUntil(new ConsoleHasText("Debugger listening"), TimePeriod.LONG);

	}

	@After
	public void terminate() {
		terminatePrcs(launchListener.getNodeJSLaunch().getProcesses());
		ILaunchManager manager = DebugPlugin.getDefault().getLaunchManager();
		manager.removeLaunchListener(launchListener);
	}

	@Test
	public void testJSVariablesAvailableInView() {

		TreeItem varExpress = getVariable(DEBUG_VARIABLE_EXPRESS);
		TreeItem varPort = getVariable(DEBUG_VARIABLE_PORT);

		assertTrue("Variable '" + DEBUG_VARIABLE_EXPRESS + "' not found in view!", varExpress != null);
		assertThat(varExpress.getCell(0), is(DEBUG_VARIABLE_EXPRESS));
		assertThat(varExpress.getCell(1), is("undefined"));

		assertTrue("Variable '" + DEBUG_VARIABLE_PORT + "' not found in view!", varPort != null);
		assertThat(varPort.getCell(0), is(DEBUG_VARIABLE_PORT));
		assertThat(varPort.getCell(1), is("undefined"));

	}

	@Test
	public void testJSVariablesInitialized() throws CoreException {

		new ProjectExplorer().getProject(TEST_APP_NAME).getProjectItem("book.js").open();
		new WaitUntil(new EditorWithTitleIsActive("book.js"));
		TextEditor editor = new TextEditor("book.js");
		setLineBreakpoint(editor, BOOK_JS_BREAKPOINT_LINE);

		// resume
		new WorkbenchView("Debug").open();
		DefaultTree debugTree = new DefaultTree();
		resume(debugTree, new RegexMatcher("\\(anonymous function\\)(.*)(index\\.js)(.*)"));

		new WaitUntil(new EditorWithTitleIsActive("book.js"), TimePeriod.LONG);
		new WaitUntil(new CursorPositionIsOnLine(editor, BOOK_JS_BREAKPOINT_LINE));

		TreeItem varTitle = getVariable(DEBUG_VARIABLE_TITLE);
		TreeItem varAuthor = getVariable(DEBUG_VARIABLE_AUTHOR);

		assertTrue("Variable '" + DEBUG_VARIABLE_TITLE + "' not found in view!", varTitle != null);
		assertThat(varTitle.getCell(0), is(DEBUG_VARIABLE_TITLE));
		assertThat(varTitle.getCell(1), is(DEBUG_VARIABLE_TITLE_VALUE));

		assertTrue("Variable '" + DEBUG_VARIABLE_AUTHOR + "' not found in view!", varAuthor != null);
		assertThat(varAuthor.getCell(0), is(DEBUG_VARIABLE_AUTHOR));
		assertThat(varAuthor.getCell(1), is(DEBUG_VARIABLE_AUTHOR_VALUE));
	}

	@Test
	public void testDebuggerStopsAtBreakpoint() throws CoreException {

		new ProjectExplorer().getProject(TEST_APP_NAME).getProjectItem("book.js").open();
		new WaitUntil(new EditorWithTitleIsActive("book.js"));
		TextEditor editor = new TextEditor("book.js");
		setLineBreakpoint(editor, BOOK_JS_BREAKPOINT_LINE);

		// resume
		new WorkbenchView("Debug").open();
		DefaultTree debugTree = new DefaultTree();
		resume(debugTree, new RegexMatcher("\\(anonymous function\\)(.*)(index\\.js)(.*)"));

		try {
			new WaitUntil(new EditorWithTitleIsActive("book.js"), TimePeriod.LONG);
			new WaitUntil(new CursorPositionIsOnLine(editor, BOOK_JS_BREAKPOINT_LINE));
		} catch (WaitTimeoutExpiredException e) {
			Assert.fail("Debugger hasn't stopped on breakpoint");
		}
	}

}