// Copyright (C) 2018 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.google.gerrit.server.schema;

import com.google.gerrit.reviewdb.client.RefNames;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.config.AllUsersName;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Provider;
import java.io.IOException;
import java.sql.SQLException;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.RefUpdate;
import org.eclipse.jgit.lib.Repository;

/** Set HEAD for All-Users to refs/meta/config. */
public class Schema_166 extends SchemaVersion {
  private final GitRepositoryManager repoManager;
  private final AllUsersName allUsersName;

  @Inject
  Schema_166(
      Provider<Schema_165> prior, GitRepositoryManager repoManager, AllUsersName allUsersName) {
    super(prior);
    this.repoManager = repoManager;
    this.allUsersName = allUsersName;
  }

  @Override
  protected void migrateData(ReviewDb db, UpdateUI ui) throws OrmException, SQLException {
    try (Repository git = repoManager.openRepository(allUsersName)) {
      RefUpdate u = git.updateRef(Constants.HEAD);
      u.link(RefNames.REFS_CONFIG);
    } catch (IOException e) {
      throw new OrmException(String.format("Failed to update HEAD for %s", allUsersName.get()), e);
    }
  }
}