// Copyright (C) 2016 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.common.annotations.VisibleForTesting;
import com.google.gerrit.extensions.registration.DynamicItem;
import com.google.gerrit.lifecycle.LifecycleModule;
import com.google.gerrit.server.change.AccountPatchReviewStore;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.config.SitePaths;
import com.google.gwtorm.server.OrmDuplicateKeyException;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import java.sql.SQLException;
import org.eclipse.jgit.lib.Config;

@Singleton
public class H2AccountPatchReviewStore extends JdbcAccountPatchReviewStore {

  @VisibleForTesting
  public static class InMemoryModule extends LifecycleModule {
    @Override
    protected void configure() {
      H2AccountPatchReviewStore inMemoryStore = new H2AccountPatchReviewStore();
      DynamicItem.bind(binder(), AccountPatchReviewStore.class).toInstance(inMemoryStore);
      listener().toInstance(inMemoryStore);
    }
  }

  @Inject
  H2AccountPatchReviewStore(@GerritServerConfig Config cfg, SitePaths sitePaths) {
    super(cfg, sitePaths);
  }

  /**
   * Creates an in-memory H2 database to store the reviewed flags. This should be used for tests
   * only.
   */
  @VisibleForTesting
  private H2AccountPatchReviewStore() {
    // DB_CLOSE_DELAY=-1: By default the content of an in-memory H2 database is
    // lost at the moment the last connection is closed. This option keeps the
    // content as long as the vm lives.
    super(createDataSource("jdbc:h2:mem:account_patch_reviews;DB_CLOSE_DELAY=-1"));
  }

  @Override
  public OrmException convertError(String op, SQLException err) {
    switch (getSQLStateInt(err)) {
      case 23001: // UNIQUE CONSTRAINT VIOLATION
      case 23505: // DUPLICATE_KEY_1
        return new OrmDuplicateKeyException("account_patch_reviews", err);

      default:
        if (err.getCause() == null && err.getNextException() != null) {
          err.initCause(err.getNextException());
        }
        return new OrmException(op + " failure on account_patch_reviews", err);
    }
  }
}