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#ifndef MOZC_SYNC_SYNCER_H_
#define MOZC_SYNC_SYNCER_H_

#include <map>
#include "base/base.h"
// for FRIEND_TEST()
#include "sync/syncer_interface.h"
#include "testing/base/public/gunit_prod.h"

namespace mozc {
namespace sync {
class AdapterInterface;
class ServiceInterface;

// Syncer is a class for managing Service and
// Adapter, dispatching adapters request to service.
class Syncer : public SyncerInterface {
 public:
  explicit Syncer(ServiceInterface *service);
  virtual ~Syncer();

  bool RegisterAdapter(AdapterInterface *adapter);

  virtual bool Start();

  virtual bool Sync(bool *reload_required);
  virtual bool Clear();

 private:
  FRIEND_TEST(SyncerTest, Timestamp);
  FRIEND_TEST(SyncerTest, Clear);
  FRIEND_TEST(SyncerTest, Download);
  FRIEND_TEST(SyncerTest, Upload);
  FRIEND_TEST(SyncerTest, CheckConfig);

  bool Download(bool *reload_required);
  bool Upload();

  uint64 GetLastDownloadTimestamp() const;
  void SetLastDownloadTimestamp(uint64 value);

  typedef map<uint32, AdapterInterface*> AdapterMap;
  ServiceInterface *service_;
  AdapterMap adapters_;
};
}  // sync
}  // mozc

#endif  // MOZC_SYNC_SYNCER_H_