// 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.spannerrefdb;

import com.google.cloud.spanner.DatabaseClient;
import java.util.concurrent.ScheduledThreadPoolExecutor;

public abstract class SpannerTestSystem {

  public static SpannerTestSystem create() throws Exception {
    SpannerTestSystem testSystem;
    if (System.getenv("GOOGLE_APPLICATION_CREDENTIALS") == null) {
      testSystem = new EmulatedSpannerRefDb();
    } else {
      testSystem = RealSpannerRefDb.create();
    }
    testSystem.reset();
    return testSystem;
  }

  protected SpannerTestSystem() {}

  abstract void reset() throws Exception;

  abstract SpannerRefDatabase database();

  abstract DatabaseClient dbClient();

  abstract ScheduledThreadPoolExecutor heartbeatExecutor();

  abstract void cleanup();
}