/*
 * Copyright (C) 2015, Kaloyan Raev <kaloyan.r@zend.com>
 * and other copyright owners as documented in the project's IP log.
 *
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Distribution License v1.0 which
 * accompanies this distribution, is reproduced below, and is
 * available at http://www.eclipse.org/org/documents/edl-v10.php
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials provided
 *   with the distribution.
 *
 * - Neither the name of the Eclipse Foundation, Inc. nor the
 *   names of its contributors may be used to endorse or promote
 *   products derived from this software without specific prior
 *   written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.eclipse.jgit.pgm;

import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.lib.CLIRepositoryTestCase;
import org.eclipse.jgit.revwalk.RevCommit;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;

public class ResetTest extends CLIRepositoryTestCase {

	private Git git;

	@Override
	@Before
	public void setUp() throws Exception {
		super.setUp();
		git = new Git(db);
	}

	@Test
	public void testPathOptionHelp() throws Exception {
		String[] result = execute("git reset -h");
		assertTrue("Unexpected argument: " + result[1],
				result[1].endsWith("[-- path ...]"));
	}

	@Test
	public void testZombieArgument_Bug484951() throws Exception {
		String[] result = execute("git reset -h");
		assertFalse("Unexpected argument: " + result[0],
				result[0].contains("[VAL ...]"));
	}

	@Test
	public void testResetSelf() throws Exception {
		RevCommit commit = git.commit().setMessage("initial commit").call();
		assertStringArrayEquals("",
				execute("git reset --hard " + commit.getId().name()));
		assertEquals(commit.getId(),
				git.getRepository().exactRef("HEAD").getObjectId());
	}

	@Test
	public void testResetPrevious() throws Exception {
		RevCommit commit = git.commit().setMessage("initial commit").call();
		git.commit().setMessage("second commit").call();
		assertStringArrayEquals("",
				execute("git reset --hard " + commit.getId().name()));
		assertEquals(commit.getId(),
				git.getRepository().exactRef("HEAD").getObjectId());
	}

	@Test
	public void testResetEmptyPath() throws Exception {
		RevCommit commit = git.commit().setMessage("initial commit").call();
		assertStringArrayEquals("",
				execute("git reset --hard " + commit.getId().name() + " --"));
		assertEquals(commit.getId(),
				git.getRepository().exactRef("HEAD").getObjectId());
	}

	@Test
	public void testResetPathDoubleDash() throws Exception {
		resetPath(true, true);
	}

	@Test
	public void testResetPathNoDoubleDash() throws Exception {
		resetPath(false, true);
	}

	@Test
	public void testResetPathDoubleDashNoRef() throws Exception {
		resetPath(true, false);
	}

	@Ignore("Currently we cannote recognize if a name is a commit-ish or a path, "
			+ "so 'git reset a' will not work if 'a' is not a branch name but a file path")
	@Test
	public void testResetPathNoDoubleDashNoRef() throws Exception {
		resetPath(false, false);
	}

	private void resetPath(boolean useDoubleDash, boolean supplyCommit)
			throws Exception {
		// create files a and b
		writeTrashFile("a", "Hello world a");
		writeTrashFile("b", "Hello world b");
		// stage the files
		git.add().addFilepattern(".").call();
		// commit the files
		RevCommit commit = git.commit().setMessage("files a & b").call();

		// change both files a and b
		writeTrashFile("a", "New Hello world a");
		writeTrashFile("b", "New Hello world b");
		// stage the files
		git.add().addFilepattern(".").call();

		// reset only file a
		String cmd = String.format("git reset %s%s a",
				supplyCommit ? commit.getId().name() : "",
				useDoubleDash ? " --" : "");
		assertStringArrayEquals("", execute(cmd));
		assertEquals(commit.getId(),
				git.getRepository().exactRef("HEAD").getObjectId());

		org.eclipse.jgit.api.Status status = git.status().call();
		// assert that file a is unstaged
		assertArrayEquals(new String[] { "a" },
				status.getModified().toArray());
		// assert that file b is still staged
		assertArrayEquals(new String[] { "b" },
				status.getChanged().toArray());
	}

}