/*******************************************************************************
 * Copyright (c) 2000, 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.jsdt.core.tests.model;

import junit.framework.Test;

import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.*;
import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
import org.eclipse.wst.jsdt.core.IJavaScriptElement;
import org.eclipse.wst.jsdt.core.IJavaScriptProject;
import org.eclipse.wst.jsdt.core.JavaScriptModelException;
import org.eclipse.wst.jsdt.core.search.*;
import org.eclipse.wst.jsdt.core.tests.model.AbstractJavaSearchTests.JavaSearchResultCollector;
import org.eclipse.wst.jsdt.core.tests.util.Util;
import org.eclipse.wst.jsdt.internal.core.search.JavaSearchDocument;
import org.eclipse.wst.jsdt.internal.core.search.indexing.SourceIndexer;
import org.eclipse.wst.jsdt.internal.core.search.processing.JobManager;

/**
 * Tests the search participant supprt.
 */
public class SearchParticipantTests extends ModifyingResourceTests implements IJavaScriptSearchConstants {

	IJavaScriptProject project;
	boolean deleteProject = true;

	public class TestSearchParticipant extends SearchParticipant {
		
		class WrapperDocument  extends SearchDocument {
			
			private SearchDocument document;
			
			WrapperDocument(SearchDocument document, SearchParticipant participant) {
				super(document.getPath().replaceAll(".test", ".js"), participant);
				this.document = document;
			}

			public byte[] getByteContents() {
				return this.document.getByteContents();
			}

			public char[] getCharContents() {
				return this.document.getCharContents();
			}

			public String getEncoding() {
				return this.document.getEncoding();
			}
		}
				
		private SearchParticipant defaultSearchParticipant = SearchEngine.getDefaultSearchParticipant();
		
		public SearchDocument getDocument(String documentPath) {
			return new TestSearchDocument(documentPath, this);
		}

		public void indexDocument(SearchDocument document, IPath indexLocation) {
			((TestSearchDocument) document).indexingRequested = true;
			document.removeAllIndexEntries();
			String documentPath = document.getPath();
			if (documentPath.endsWith(".test")) {
				new SourceIndexer(document).indexDocument();
			}
		}

		public void locateMatches(SearchDocument[] documents, SearchPattern pattern, IJavaScriptSearchScope scope, SearchRequestor requestor, IProgressMonitor monitor) throws CoreException {
			int length = documents.length;
			SearchDocument[] wrapperDocuments = new SearchDocument[length];
			for (int i = 0; i < length; i++) {
				wrapperDocuments[i] = new WrapperDocument(documents[i], this);
			}
			this.defaultSearchParticipant.locateMatches(wrapperDocuments, pattern, scope, requestor, monitor);
		}

		public IPath[] selectIndexes(SearchPattern query, IJavaScriptSearchScope scope) {
			return new IPath[] {getIndexLocation()};
		}
	}
	
	public class TestSearchDocument extends JavaSearchDocument {

		public boolean indexingRequested;
		private String fileSystemPath;

		protected TestSearchDocument(String documentPath, SearchParticipant participant) {
			super(documentPath, participant);
			this.fileSystemPath = getWorkspaceRoot().getFile(new Path(documentPath)).getLocation().toOSString();
		}

		public byte[] getByteContents() {
			String fileContent = Util.fileContent(this.fileSystemPath);
			if (fileContent == null) return null;
			return fileContent.getBytes();
		}

		public char[] getCharContents() {
			String fileContent = Util.fileContent(this.fileSystemPath);
			if (fileContent == null) return null;
			return fileContent.toCharArray();
		}

		public String getEncoding() {
			return null;
		}
	}
	
	public class TestResultCollector extends JavaSearchResultCollector {
		protected char[] getSource(IResource resource, IJavaScriptElement element, IJavaScriptUnit unit) throws JavaScriptModelException {
			IPath path = resource.getLocation().removeFileExtension().addFileExtension("test");
			String fileContent = Util.fileContent(path.toFile().getPath());
			if (fileContent == null) return null;
			return fileContent.toCharArray();
		}
		protected String getPathString(IResource resource, IJavaScriptElement element) {
			return super.getPathString(resource, element).replaceAll(".js", ".test");
		}
	}

	public static Test suite() {
		return buildModelTestSuite(SearchParticipantTests.class);
	}

	public void setUpSuite() throws Exception {
		super.setUpSuite();
		deleteFile(getIndexLocation().toFile());
	}

	public void tearDownSuite() throws Exception {
		super.tearDownSuite();
		if (this.project != null) {
			deleteProject("P");
		}
	}

	protected void setUp() throws Exception {
		super.setUp();
		if (this.project == null) {
			this.project = createJavaProject("P");
		}
		this.deleteProject = true;
		if (JobManager.VERBOSE) {
			System.out.println("--------------------------------------------------------------------------------");
			System.out.println("Run test "+getName()+"...");
		}
	}

	protected void tearDown() throws Exception {
		// Do not delete specific index file between tests as corresponding still lives in IndexManager cache
		// TODO (frederic) Uncomment when bug https://bugs.eclipse.org/bugs/show_bug.cgi?id=116650 will be fixed
		//deleteFile(getIndexLocation().toFile());
		if (this.deleteProject) {
			deleteProject("P");
			this.project = null;
		}
		super.tearDown();
	}

	public SearchParticipantTests(String name) {
		super(name);
	}

	IPath getIndexLocation() {
		return new Path(getExternalPath() + "test.index");
	}

	/*
	 * Ensures that scheduleDocumentIndexing(...) triggers a call to indexDocument(...)
	 * (case of document existing on disk)
	 */
	public void testScheduleDocumentIndexing1() throws CoreException {
		createFile("/P/X.test", "");
		TestSearchParticipant participant = new TestSearchParticipant();
		TestSearchDocument document = new TestSearchDocument("/P/X.test", participant);
		participant.scheduleDocumentIndexing(document, getIndexLocation());
		waitUntilIndexesReady();
		assertTrue("Should have requested to index document", document.indexingRequested);
	}

	/*
	 * Ensures that scheduleDocumentIndexing(...) triggers a call to indexDocument(...)
	 * (case of document that doesn't exist on disk)
	 */
	public void testScheduleDocumentIndexing2() throws CoreException {
		TestSearchParticipant participant = new TestSearchParticipant();
		TestSearchDocument document = new TestSearchDocument("/P/X.test", participant);
		participant.scheduleDocumentIndexing(document, getIndexLocation());
		waitUntilIndexesReady();
		assertTrue("Should have requested to index document", document.indexingRequested);
	}

	/*
	 * Ensures that adding index entries through indexDocument() updates the index file.
	 */
	public synchronized void testIndexDocument01() throws CoreException, InterruptedException {
		createFile(
			"/P/X.test",
			"function X() {\n" +
			"}"
		);
		TestSearchParticipant participant = new TestSearchParticipant();
		TestSearchDocument document = new TestSearchDocument("/P/X.test", participant);
		participant.scheduleDocumentIndexing(document, getIndexLocation());
		waitUntilIndexesReady();
		wait(1100); // wait more than 1000ms so as to allow for the index to be saved on disk
		document = new TestSearchDocument("/P/no", participant);
		participant.scheduleDocumentIndexing(document, getIndexLocation());
		waitUntilIndexesReady();
		assertTrue("Index file should have been written",  getIndexLocation().toFile().length() > 0);

		// remove index file
		participant.removeIndex(getIndexLocation());
		assertFalse("Index file should have been removed",  getIndexLocation().toFile().exists());
	}

	/*
	 * Ensures that adding index entries through indexDocument() updates the index file
	 * and that exit session keeps it.
	 */
	public synchronized void testIndexDocument02() throws CoreException, InterruptedException {
		TestSearchParticipant participant = new TestSearchParticipant(){
			public void indexDocument(SearchDocument document, IPath indexLocation) {
				if (!document.getPath().equals("/P/no")) {
					for (int i = 0; i < 1000; i++) {
						document.addIndexEntry(("category" + i).toCharArray(), ("key" + i).toCharArray());
					}
				}
			}
		};
		TestSearchDocument document = new TestSearchDocument("/P/X.test", participant);
		participant.scheduleDocumentIndexing(document, getIndexLocation());
		waitUntilIndexesReady();
		wait(1100); // wait more than 1000ms so as to allow for the index to be saved on disk
		document = new TestSearchDocument("/P/no", participant);
		participant.scheduleDocumentIndexing(document, getIndexLocation());
		waitUntilIndexesReady();
		wait(1100); // wait more than 1000ms so as to allow for the index to be saved on disk
		assertTrue("Index file should have been written",  getIndexLocation().toFile().length() > 0);

		// shutdown
		simulateExit();
		assertTrue("Index file should stay after shutdown",  getIndexLocation().toFile().length() > 0);
		this.deleteProject = false;

		// remove index file
		participant.removeIndex(getIndexLocation());
		assertFalse("Index file should have been removed",  getIndexLocation().toFile().exists());

		// restart
		simulateRestart();
	}

	/*
	 * Ensures that adding index entries through indexDocument() updates the index file.
	 */
	public synchronized void testIndexDocument03() throws CoreException, InterruptedException {
		createFile(
			"/P/X.test",
			"function X() {\n" +
			"}"
		);
		TestSearchParticipant participant = new TestSearchParticipant();
		TestSearchDocument document = new TestSearchDocument("/P/X.test", participant);
		participant.scheduleDocumentIndexing(document, getIndexLocation());
		waitUntilIndexesReady();
		wait(1100); // wait more than 1000ms so as to allow for the index to be saved on disk
		document = new TestSearchDocument("/P/no", participant);
		participant.scheduleDocumentIndexing(document, getIndexLocation());
		waitUntilIndexesReady();
		assertTrue("Index file should have been written",  getIndexLocation().toFile().length() > 0);

		// remove index file
		participant.removeIndex(getIndexLocation());
		assertFalse("Index file should have been removed",  getIndexLocation().toFile().exists());
	}
	
	/*
	 * Ensures that a simple search that forwards queries to the default participant works as expected
	 */
	public void testSearch() throws CoreException {
		createFile(
			"/P/X.test",
			"function X() {\n" +
			"}"
		);

		// index file
		TestSearchParticipant participant = new TestSearchParticipant();
		TestSearchDocument document = new TestSearchDocument("/P/X.test", participant);
		participant.scheduleDocumentIndexing(document, getIndexLocation());
		waitUntilIndexesReady();

		// search for declaration of X
		SearchPattern pattern = SearchPattern.createPattern("X", IJavaScriptSearchConstants.FUNCTION, IJavaScriptSearchConstants.FUNCTION, SearchPattern.R_EXACT_MATCH);
		IJavaScriptSearchScope scope = SearchEngine.createWorkspaceScope();
		SearchRequestor requestor =  new TestResultCollector();
		new SearchEngine().search(pattern, new SearchParticipant[] {participant}, scope, requestor, null);
		assertSearchResults(
			"X.test X [X]",
			requestor);
	}
}