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// Functions defined in sync_status_manager.(h|cc) manage the status of sync
// feature, mainly stocking errors occured in the last sync.
// Public methods are thread-safe, so you can call them without caring threads,
// and notify about race condition to edit these methods.

#ifndef MOZC_SYNC_SYNC_STATUS_MANAGER_H_
#define MOZC_SYNC_SYNC_STATUS_MANAGER_H_

#include "base/mutex.h"
#include "sync/sync_status_manager_interface.h"

namespace mozc {
namespace sync {

class SyncStatusManager : public SyncStatusManagerInterface {
 public:
  SyncStatusManager();
  virtual ~SyncStatusManager();

  virtual void GetLastSyncStatus(commands::CloudSyncStatus *sync_status);
  virtual void SetLastSyncStatus(const commands::CloudSyncStatus &sync_status);

  // Save current sync status in registry obviously.
  virtual void SaveSyncStatus();

  // Each method below updates a part of sync status.
  // Set in |last_synced_timestamp|.
  virtual void SetLastSyncedTimestamp(const int64 timestamp);

  // Set in |sync_global_status|.
  virtual void SetSyncGlobalStatus(
      const commands::CloudSyncStatus::SyncGlobalStatus global_status);

  // Add a |sync_error| item, with error_code and a timestamp.
  virtual void AddSyncError(
      const commands::CloudSyncStatus::ErrorCode error_code);

  // Clear everything other than |sync_global_status| and
  // |last_synced_timestamp|.
  // TODO(peria): Stack whole status before clearing.
  virtual void NewSyncStatusSession();

  // TODO(peria): Stack sync_status for few syncs, and make methods to access
  // or to operate with old statuses.

 private:
  commands::CloudSyncStatus sync_status_;
  Mutex mutex_;
};

}  // namespace sync
}  // namespace mozc

#endif  // MOZC_SYNC_SYNC_STATUS_MANGER_H_