/*
 * Copyright (C) 2010, 2020 Chris Aniszczyk <caniszczyk@gmail.com> and others
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0 which is available at
 * https://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */
package org.eclipse.jgit.api;

import static org.eclipse.jgit.lib.Constants.R_TAGS;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertThrows;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.api.errors.InvalidTagNameException;
import org.eclipse.jgit.api.errors.JGitInternalException;
import org.eclipse.jgit.api.errors.RefAlreadyExistsException;
import org.eclipse.jgit.junit.RepositoryTestCase;
import org.eclipse.jgit.junit.TestRepository;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.RefUpdate;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.junit.Test;

public class TagCommandTest extends RepositoryTestCase {

	@Test
	public void testTagKind() {
		try (Git git = new Git(db)) {
			assertTrue(git.tag().isAnnotated());
			assertTrue(git.tag().setSigned(true).isAnnotated());
			assertTrue(git.tag().setSigned(false).isAnnotated());
			assertTrue(git.tag().setSigningKey(null).isAnnotated());
			assertTrue(git.tag().setSigningKey("something").isAnnotated());
			assertTrue(git.tag().setSigned(false).setSigningKey(null)
					.isAnnotated());
			assertTrue(git.tag().setSigned(false).setSigningKey("something")
					.isAnnotated());
			assertTrue(git.tag().setSigned(true).setSigningKey(null)
					.isAnnotated());
			assertTrue(git.tag().setSigned(true).setSigningKey("something")
					.isAnnotated());
			assertTrue(git.tag().setAnnotated(true).isAnnotated());
			assertTrue(
					git.tag().setAnnotated(true).setSigned(true).isAnnotated());
			assertTrue(git.tag().setAnnotated(true).setSigned(false)
					.isAnnotated());
			assertTrue(git.tag().setAnnotated(true).setSigningKey(null)
					.isAnnotated());
			assertTrue(git.tag().setAnnotated(true).setSigningKey("something")
					.isAnnotated());
			assertTrue(git.tag().setAnnotated(true).setSigned(false)
					.setSigningKey(null).isAnnotated());
			assertTrue(git.tag().setAnnotated(true).setSigned(false)
					.setSigningKey("something").isAnnotated());
			assertTrue(git.tag().setAnnotated(true).setSigned(true)
					.setSigningKey(null).isAnnotated());
			assertTrue(git.tag().setAnnotated(true).setSigned(true)
					.setSigningKey("something").isAnnotated());
			assertFalse(git.tag().setAnnotated(false).isAnnotated());
			assertTrue(git.tag().setAnnotated(false).setSigned(true)
					.isAnnotated());
			assertFalse(git.tag().setAnnotated(false).setSigned(false)
					.isAnnotated());
			assertFalse(git.tag().setAnnotated(false).setSigningKey(null)
					.isAnnotated());
			assertTrue(git.tag().setAnnotated(false).setSigningKey("something")
					.isAnnotated());
			assertFalse(git.tag().setAnnotated(false).setSigned(false)
					.setSigningKey(null).isAnnotated());
			assertTrue(git.tag().setAnnotated(false).setSigned(false)
					.setSigningKey("something").isAnnotated());
			assertTrue(git.tag().setAnnotated(false).setSigned(true)
					.setSigningKey(null).isAnnotated());
			assertTrue(git.tag().setAnnotated(false).setSigned(true)
					.setSigningKey("something").isAnnotated());
		}
	}

	@Test
	public void testTaggingOnHead() throws GitAPIException, IOException {
		try (Git git = new Git(db);
				RevWalk walk = new RevWalk(db)) {
			RevCommit commit = git.commit().setMessage("initial commit").call();
			Ref tagRef = git.tag().setName("tag").call();
			assertEquals(commit.getId(),
					db.getRefDatabase().peel(tagRef).getPeeledObjectId());
			assertEquals("tag", walk.parseTag(tagRef.getObjectId()).getTagName());
		}
	}

	@Test
	public void testTagging()
			throws GitAPIException, JGitInternalException, IOException {
		try (Git git = new Git(db)) {
			git.commit().setMessage("initial commit").call();
			RevCommit commit = git.commit().setMessage("second commit").call();
			git.commit().setMessage("third commit").call();
			Ref tagRef = git.tag().setObjectId(commit).setName("tag").call();
			assertEquals(commit.getId(),
					db.getRefDatabase().peel(tagRef).getPeeledObjectId());
		}
	}

	@Test
	public void testUnannotatedTagging() throws GitAPIException,
			JGitInternalException {
		try (Git git = new Git(db)) {
			git.commit().setMessage("initial commit").call();
			RevCommit commit = git.commit().setMessage("second commit").call();
			git.commit().setMessage("third commit").call();
			Ref tagRef = git.tag().setObjectId(commit).setName("tag")
					.setAnnotated(false).call();
			assertEquals(commit.getId(), tagRef.getObjectId());
		}
	}

	@Test
	public void testForceNoChangeLightweight() throws GitAPIException {
		try (Git git = new Git(db)) {
			git.commit().setMessage("initial commit").call();
			RevCommit commit = git.commit().setMessage("second commit").call();
			git.commit().setMessage("third commit").call();
			Ref tagRef = git.tag().setObjectId(commit).setName("tag")
					.setAnnotated(false).call();
			assertEquals(commit.getId(), tagRef.getObjectId());
			// Without force, we want to get a RefAlreadyExistsException
			RefAlreadyExistsException e = assertThrows(
					RefAlreadyExistsException.class,
					() -> git.tag().setObjectId(commit).setName("tag")
							.setAnnotated(false).call());
			assertEquals(RefUpdate.Result.NO_CHANGE, e.getUpdateResult());
			// With force the call should work
			assertEquals(commit.getId(),
					git.tag().setObjectId(commit).setName("tag")
							.setAnnotated(false).setForceUpdate(true).call()
							.getObjectId());
		}
	}

	@Test
	public void testEmptyTagName() throws GitAPIException {
		try (Git git = new Git(db)) {
			git.commit().setMessage("initial commit").call();
			try {
				// forget to tag name
				git.tag().setMessage("some message").call();
				fail("We should have failed without a tag name");
			} catch (InvalidTagNameException e) {
				// should hit here
			}
		}
	}

	@Test
	public void testInvalidTagName() throws GitAPIException {
		try (Git git = new Git(db)) {
			git.commit().setMessage("initial commit").call();
			try {
				git.tag().setName("bad~tag~name").setMessage("some message").call();
				fail("We should have failed due to a bad tag name");
			} catch (InvalidTagNameException e) {
				// should hit here
			}
		}
	}

	private List<Ref> getTags() throws Exception {
		return db.getRefDatabase().getRefsByPrefix(R_TAGS);
	}

	@Test
	public void testDelete() throws Exception {
		try (Git git = new Git(db)) {
			git.commit().setMessage("initial commit").call();
			Ref tagRef = git.tag().setName("tag").call();
			assertEquals(1, getTags().size());

			List<String> deleted = git.tagDelete().setTags(tagRef.getName())
					.call();
			assertEquals(1, deleted.size());
			assertEquals(tagRef.getName(), deleted.get(0));
			assertEquals(0, getTags().size());

			Ref tagRef1 = git.tag().setName("tag1").call();
			Ref tagRef2 = git.tag().setName("tag2").call();
			assertEquals(2, getTags().size());
			deleted = git.tagDelete().setTags(tagRef1.getName(), tagRef2.getName())
					.call();
			assertEquals(2, deleted.size());
			assertEquals(0, getTags().size());
		}
	}

	@Test
	public void testDeleteFullName() throws Exception {
		try (Git git = new Git(db)) {
			git.commit().setMessage("initial commit").call();
			Ref tagRef = git.tag().setName("tag").call();
			assertEquals(1, getTags().size());

			List<String> deleted = git.tagDelete()
					.setTags(Repository.shortenRefName(tagRef.getName())).call();
			assertEquals(1, deleted.size());
			assertEquals(tagRef.getName(), deleted.get(0));
			assertEquals(0, getTags().size());
		}
	}

	@Test
	public void testDeleteEmptyTagNames() throws Exception {
		try (Git git = new Git(db)) {
			git.commit().setMessage("initial commit").call();

			List<String> deleted = git.tagDelete().setTags().call();
			assertEquals(0, deleted.size());
		}
	}

	@Test
	public void testDeleteNonExisting() throws Exception {
		try (Git git = new Git(db)) {
			git.commit().setMessage("initial commit").call();

			List<String> deleted = git.tagDelete().setTags("tag").call();
			assertEquals(0, deleted.size());
		}
	}

	@Test
	public void testDeleteBadName() throws Exception {
		try (Git git = new Git(db)) {
			git.commit().setMessage("initial commit").call();

			List<String> deleted = git.tagDelete().setTags("bad~tag~name")
					.call();
			assertEquals(0, deleted.size());
		}
	}

	@Test
	public void testShouldNotBlowUpIfThereAreNoTagsInRepository()
			throws Exception {
		try (Git git = new Git(db)) {
			git.add().addFilepattern("*").call();
			git.commit().setMessage("initial commit").call();
			List<Ref> list = git.tagList().call();
			assertEquals(0, list.size());
		}
	}

	@Test
	public void testShouldNotBlowUpIfThereAreNoCommitsInRepository()
			throws Exception {
		try (Git git = new Git(db)) {
			List<Ref> list = git.tagList().call();
			assertEquals(0, list.size());
		}
	}

	@Test
	public void testListAllTagsInRepositoryInOrder() throws Exception {
		try (Git git = new Git(db)) {
			git.add().addFilepattern("*").call();
			git.commit().setMessage("initial commit").call();

			git.tag().setName("v3").call();
			git.tag().setName("v2").call();
			git.tag().setName("v10").call();

			List<Ref> list = git.tagList().call();

			assertEquals(3, list.size());
			assertEquals("refs/tags/v10", list.get(0).getName());
			assertEquals("refs/tags/v2", list.get(1).getName());
			assertEquals("refs/tags/v3", list.get(2).getName());
		}
	}

	@Test
	public void testListTagsContainingCommit() throws Exception {
		/*      c3
		 *      |
		 * v2 - c2   b2 - v1
		 *      |    |
		 *      c1   b1
		 *       \   /
		 *         a
		 */
		try (TestRepository<Repository> r = new TestRepository<>(
				db)) {
			Git git = Git.wrap(db);
			RevCommit a = r.commit().create();
			RevCommit b1 = r.commit(a);
			RevCommit b2 = r.commit(b1);
			RevCommit c1 = r.commit(a);
			RevCommit c2 = r.commit(c1);
			RevCommit c3 = r.commit(c2);
			r.update("refs/tags/v1", r.tag("v1", b2));
			r.update("refs/tags/v2", r.tag("v1.1", c2));
			List<Ref> res = git.tagList().setContains(a).call();
			assertEquals(2, res.size());
			assertTrue(res.stream().map(Ref::getName)
					.collect(Collectors.toSet()).containsAll(
							Arrays.asList("refs/tags/v1", "refs/tags/v2")));

			res = git.tagList().setContains(b1).call();
			assertEquals(1, res.size());
			assertTrue(res.stream().map(Ref::getName)
					.collect(Collectors.toSet()).contains("refs/tags/v1"));

			res = git.tagList().setContains(c1).call();
			assertEquals(1, res.size());
			assertTrue(res.stream().map(Ref::getName)
					.collect(Collectors.toSet()).contains("refs/tags/v2"));

			res = git.tagList().setContains(c3).call();
			assertEquals(0, res.size());
		}
	}
}