// Copyright (C) 2023 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package com.googlesource.gerrit.plugins.replication.pull;

import static com.google.common.truth.Truth.assertThat;
import static com.google.gerrit.acceptance.GitUtil.deleteRef;
import static com.google.gerrit.acceptance.GitUtil.pushHead;
import static com.google.gerrit.acceptance.testsuite.project.TestProjectUpdate.allow;

import com.google.common.collect.Lists;
import com.google.gerrit.acceptance.PushOneCommit;
import com.google.gerrit.acceptance.SkipProjectClone;
import com.google.gerrit.acceptance.TestPlugin;
import com.google.gerrit.acceptance.UseLocalDisk;
import com.google.gerrit.acceptance.testsuite.project.ProjectOperations;
import com.google.gerrit.entities.Permission;
import com.google.inject.Inject;
import com.googlesource.gerrit.plugins.replication.pull.fetch.Fetch;
import com.googlesource.gerrit.plugins.replication.pull.fetch.JGitFetch;
import com.googlesource.gerrit.plugins.replication.pull.fetch.PermanentTransportException;
import org.eclipse.jgit.lib.Config;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.transport.PushResult;
import org.eclipse.jgit.transport.RefSpec;
import org.eclipse.jgit.transport.URIish;
import org.junit.Before;
import org.junit.Test;

@SkipProjectClone
@UseLocalDisk
@TestPlugin(
    name = "pull-replication",
    sysModule = "com.googlesource.gerrit.plugins.replication.pull.JGitFetchIT$TestModule")
public class JGitFetchIT extends FetchITBase {
  private static final String TEST_REPLICATION_SUFFIX = "suffix1";
  private static final String TEST_TASK_ID = "taskid";

  @Inject private ProjectOperations projectOperations;

  @Before
  public void allowRefDeletion() {
    projectOperations
        .allProjectsForUpdate()
        .add(allow(Permission.DELETE).ref("refs/*").group(adminGroupUuid()))
        .update();
  }

  @Test(expected = PermanentTransportException.class)
  public void shouldThrowPermanentTransportExceptionWhenRefDoesNotExists() throws Exception {

    testRepo = cloneProject(createTestProject(project + TEST_REPLICATION_SUFFIX));
    String nonExistingRef = "refs/changes/02/20000/1:refs/changes/02/20000/1";
    try (Repository repo = repoManager.openRepository(project)) {
      Fetch objectUnderTest =
          fetchFactory.create(TEST_TASK_ID, new URIish(testRepoPath.toString()), repo);
      objectUnderTest.fetch(Lists.newArrayList(new RefSpec(nonExistingRef)));
    }
  }

  @Test
  public void shouldPruneRefsWhenMirrorIsUnset() throws Exception {
    testRepo = cloneProject(createTestProject(project + TEST_REPLICATION_SUFFIX));
    String branchRef = Constants.R_HEADS + "anyBranch";
    String tagRef = Constants.R_TAGS + "anyTag";

    PushOneCommit.Result branchPush = pushFactory.create(user.newIdent(), testRepo).to(branchRef);
    branchPush.assertOkStatus();

    PushResult tagPush = pushHead(testRepo, tagRef, false, false);
    assertOkStatus(tagPush, tagRef);

    try (Repository localRepo = repoManager.openRepository(project)) {
      fetchAllRefs(TEST_TASK_ID, testRepoPath, localRepo);
      assertThat(getRef(localRepo, branchRef)).isNotNull();
      assertThat(getRef(localRepo, tagRef)).isNotNull();

      PushResult deleteBranchResult = deleteRef(testRepo, branchRef);
      assertOkStatus(deleteBranchResult, branchRef);

      PushResult deleteTagResult = deleteRef(testRepo, tagRef);
      assertOkStatus(deleteTagResult, tagRef);

      fetchAllRefs(TEST_TASK_ID, testRepoPath, localRepo);
      assertThat(getRef(localRepo, branchRef)).isNotNull();
      assertThat(getRef(localRepo, tagRef)).isNotNull();
    }
  }

  @SuppressWarnings("unused")
  private static class TestModule extends FetchModule<JGitFetch> {
    @Override
    Class<JGitFetch> clientClass() {
      return JGitFetch.class;
    }

    @Override
    Config cf() {
      Config cf = new Config();
      cf.setInt("remote", "test_config", "timeout", 0);
      return cf;
    }
  }
}