// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_BROWSER_HISTORY_CLUSTERS_HISTORY_CLUSTERS_SERVICE_FACTORY_H_
#define CHROME_BROWSER_HISTORY_CLUSTERS_HISTORY_CLUSTERS_SERVICE_FACTORY_H_

#include <memory>

#include "chrome/browser/profiles/profile_keyed_service_factory.h"

namespace base {
template <typename T>
class NoDestructor;
}  // namespace base

namespace content {
class BrowserContext;
}  // namespace content

namespace history_clusters {
class HistoryClustersService;
}

// Factory for BrowserContext keyed HistoryClustersService, which clusters
// Chrome history into useful Memories to be surfaced in UI.
class HistoryClustersServiceFactory : public ProfileKeyedServiceFactory {
 public:
  // This can return nullptr in tests.
  static history_clusters::HistoryClustersService* GetForBrowserContext(
      content::BrowserContext* browser_context);

  static HistoryClustersServiceFactory* GetInstance();

  static void EnsureFactoryBuilt();

  // Returns the default factory, useful in tests where it's null by default.
  static TestingFactory GetDefaultFactory();

 private:
  friend base::NoDestructor<HistoryClustersServiceFactory>;

  HistoryClustersServiceFactory();
  ~HistoryClustersServiceFactory() override;

  // BrowserContextKeyedServiceFactory:
  std::unique_ptr<KeyedService> BuildServiceInstanceForBrowserContext(
      content::BrowserContext* context) const override;
};

#endif  // CHROME_BROWSER_HISTORY_CLUSTERS_HISTORY_CLUSTERS_SERVICE_FACTORY_H_