/*******************************************************************************
 * Copyright (c) 2010 Ericsson
 * 
 * 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
 * 
 * Description:
 * 
 * Contributors:
 *   Alvaro Sanchez-Leon - Initial Implementation
 *******************************************************************************/

package org.eclipse.mylyn.reviews.r4e.core.rfs;

import static org.junit.Assert.fail;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.List;

import junit.framework.Assert;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.egit.core.op.AddToIndexOperation;
import org.eclipse.egit.core.op.CommitOperation;
import org.eclipse.egit.core.project.RepositoryMapping;
import org.eclipse.egit.core.test.GitTestCase;
import org.eclipse.egit.core.test.TestRepository;
import org.eclipse.egit.core.test.TestUtils;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.mylyn.reviews.r4e.core.TstGeneral;
import org.eclipse.mylyn.reviews.r4e.core.model.R4EFileContext;
import org.eclipse.mylyn.reviews.r4e.core.model.R4EItem;
import org.eclipse.mylyn.reviews.r4e.core.model.R4EUser;
import org.eclipse.mylyn.reviews.r4e.core.model.RModelFactory;
import org.eclipse.mylyn.reviews.r4e.core.versions.ReviewVersionsException;
import org.eclipse.mylyn.reviews.r4e.core.versions.ReviewsVersionsIF;
import org.eclipse.mylyn.reviews.r4e.core.versions.ReviewsVersionsIF.CommitDescriptor;
import org.eclipse.mylyn.reviews.r4e.core.versions.ReviewsVersionsIF.FileVersionInfo;
import org.eclipse.mylyn.reviews.r4e.core.versions.ReviewsVersionsIFFactory;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

/**
 * @author lmcalvs
 * 
 */
public class ReviewsVersionsIFTst extends GitTestCase {
	// ------------------------------------------------------------------------
	// Constants
	// ------------------------------------------------------------------------
	private IProject			fIProject		= null;
	private TestRepository		testRepo		= null;
	private Repository			repo			= null;
	private ReviewsVersionsIF	versionsProx	= null;
	private List<IResource>	resources		= new ArrayList<IResource>();
	private IFile				ifileA			= null;

	private IFile				ifileB			= null;

	// ------------------------------------------------------------------------
	// Setup and Teardown
	// ------------------------------------------------------------------------
	/**
	 * @throws java.lang.Exception
	 */
	@Before
	public void setUp() throws Exception {
		super.setUp();
		TstGeneral.activateTracer();
		fIProject = project.getProject();
		fIProject.open(null);
		testRepo = new TestRepository(gitDir);
		testRepo.connect(fIProject);
		repo = RepositoryMapping.getMapping(fIProject).getRepository();

		versionsProx = ReviewsVersionsIFFactory.instance.getVersionsIF(fIProject);

		// Add a couple of files to the project
		ifileA = testUtils.addFileToProject(fIProject, "sub/a.txt", "a text");
		ifileB = testUtils.addFileToProject(fIProject, "sub/b.txt", "b text");

		// Add folder to index and commit
		resources.add(project.getProject().getFolder("sub"));
		new AddToIndexOperation(resources).execute(null);
		CommitOperation commitOperation = new CommitOperation(null, null, null, TestUtils.AUTHOR, TestUtils.COMMITTER,
				"first commit");
		commitOperation.setCommitAll(true);
		commitOperation.setRepository(repo);
		commitOperation.execute(null);
		fIProject.refreshLocal(IProject.DEPTH_INFINITE, null);
	}

	/**
	 * @throws java.lang.Exception
	 */
	@After
	public void tearDown() throws Exception {
		testRepo.disconnect(fIProject);
		fIProject.close(null);
		testRepo.dispose();
		repo = null;
		super.tearDown();
	}

	// ------------------------------------------------------------------------
	// Methods
	// ------------------------------------------------------------------------
	/**
	 * Test method for
	 * {@link org.eclipse.mylyn.reviews.r4e.core.versions.impl.ReviewsVersionsIF#isProviderSupported(org.eclipse.core.resources.IProject)}
	 * .
	 */
	@Test
	public void testIsProviderSupported() {
		boolean supported = versionsProx.isProviderSupported(fIProject);
		Assert.assertTrue("not supported", supported);
	}

	/**
	 * Test method for
	 * {@link org.eclipse.mylyn.reviews.r4e.core.versions.impl.ReviewsVersionsIF#getLastCommitInfo(org.eclipse.core.resources.IProject)}
	 * .
	 */
	@Test
	public void testGetLastCommitInfo() {
		CommitDescriptor cdesc = null;
		try {
			cdesc = versionsProx.getLastCommitInfo(fIProject);
		} catch (ReviewVersionsException e) {
			e.printStackTrace();
			fail("Exception");
		}

		printCommitDescriptor(cdesc);

	}

	/**
	 * Test method for
	 * {@link org.eclipse.mylyn.reviews.r4e.core.versions.impl.ReviewsVersionsIF#getCommitInfo(org.eclipse.core.resources.IProject, java.lang.String)}
	 * .
	 */
	@Test
	public void testGetCommitInfo() {
		CommitDescriptor cdesc = null;
		try {
			String lastCommitId = versionsProx.getLastCommitInfo(fIProject).getId();
			cdesc = versionsProx.getCommitInfo(fIProject, lastCommitId);
		} catch (ReviewVersionsException e) {
			e.printStackTrace();
			fail("Exception");
		}

		printCommitDescriptor(cdesc);
	}

	/**
	 * Test method for
	 * {@link org.eclipse.mylyn.reviews.r4e.core.versions.impl.ReviewsVersionsIF#createCommitReviewItem(org.eclipse.core.resources.IProject, java.lang.String, java.lang.String)}
	 * .
	 */
	@Test
	public void testCreateCommitReviewItem() {
		try {
			R4EItem revItem = createLastCommitRevItem();
			System.out.println(revItem.toString());
		} catch (ReviewVersionsException e) {
			Collection<String> details = e.getDetails();
			if (details != null) {
				for (Iterator<String> iterator = details.iterator(); iterator.hasNext();) {
					String info = iterator.next();
					System.out.println(info);
				}
			}
			e.printStackTrace();
			fail("Exception");
		}

	}

	/**
	 * Test method for
	 * {@link org.eclipse.mylyn.reviews.r4e.core.versions.impl.ReviewsVersionsIF#getFileVersionInfo(org.eclipse.core.resources.IFile)}
	 * .
	 */
	@Test
	public void testGetFileVersionInfo() {
		FileVersionInfo info = null;
		try {
			info = versionsProx.getFileVersionInfo(ifileA);
		} catch (ReviewVersionsException e) {
			e.printStackTrace();
			fail("Exception");
		}
		Assert.assertEquals("ecb10eba688e6ce0c7b5af81ed48c0d764d604fc", info.getId());
		Assert.assertEquals("Project-1/sub/a.txt", info.getRepositoryPath());
		Assert.assertEquals("a.txt", info.getName());

		try {
			info = versionsProx.getFileVersionInfo(ifileB);
		} catch (ReviewVersionsException e) {
			e.printStackTrace();
			fail("Exception");
		}

		Assert.assertEquals("Project-1/sub/b.txt", info.getRepositoryPath());
		Assert.assertEquals("b.txt", info.getName());
	}

	/**
	 * Test method for
	 * {@link org.eclipse.mylyn.reviews.r4e.core.versions.impl.ReviewsVersionsIF#openCompareSession(org.eclipse.mylyn.reviews.r4e.core.model.R4EItem)}
	 * .
	 */
	@Test
	public void testOpenCompareSession() {
		R4EItem revItem = null;
		try {
			revItem = createLastCommitRevItem();
		} catch (ReviewVersionsException e) {
			e.printStackTrace();
			fail("Exception");
		}

		List<R4EFileContext> contextLst = revItem.getFileContextList();
		if (contextLst == null || contextLst.size() < 1) {
			fail("Unexpected empty context");
		}

		// take the first one
		R4EFileContext context = contextLst.get(0);

		String bookingId = null;
		try {
			bookingId = versionsProx.openCompareSession(revItem);
			versionsProx.openCompareEditor(bookingId, context);
		} catch (ReviewVersionsException e) {
			e.printStackTrace();
			fail("Exception");
		}
		versionsProx.closeCompareSession(bookingId);
	}

	/**
	 * Test method for
	 * {@link org.eclipse.mylyn.reviews.r4e.core.versions.impl.ReviewsVersionsIF#openCompareEditor(java.lang.String, org.eclipse.mylyn.reviews.r4e.core.model.R4EFileContext)}
	 * .
	 */
	@Test
	public void testOpenCompareEditor() {
		fail("Not yet implemented");
	}

	/**
	 * Test method for
	 * {@link org.eclipse.mylyn.reviews.r4e.core.versions.impl.ReviewsVersionsIF#closeCompareSession(java.lang.String)}.
	 */
	@Test
	public void testCloseCompareSession() {
		fail("Not yet implemented");
	}

	/**
	 * @return
	 * @throws ReviewVersionsException
	 */
	private R4EItem createLastCommitRevItem() throws ReviewVersionsException {
		R4EUser reviewUser = RModelFactory.eINSTANCE.createR4EUser();
		reviewUser.setId("userIdX");
	
		String lastCommitId = versionsProx.getLastCommitInfo(fIProject).getId();
		R4EItem revItem = versionsProx.createCommitReviewItem(fIProject, lastCommitId, reviewUser);
		return revItem;
	}

	private void printCommitDescriptor(CommitDescriptor cdesc) {
		System.out.println("Author: " + cdesc.getAuthor());
		System.out.println("Commiter: " + cdesc.getCommitter());
		System.out.println("Id: " + cdesc.getId());
		System.out.println("Message: " + cdesc.getMessage());
		System.out.println("Title: " + cdesc.getTitle());
		String[] changeSets = cdesc.getChangeSet();
		for (int i = 0; i < changeSets.length; i++) {
			String change = changeSets[i];
			System.out.println("Change " + i + ": " + change);
		}
	
		System.out.println("Commit Date: " + new Date(cdesc.getCommitDate()));
	
		String[] parents = cdesc.getParentIDs();
		for (int i = 0; i < parents.length; i++) {
			String parent = parents[i];
			System.out.println("Parent " + i + ": " + parent);
		}
	}

}