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#ifndef MOZC_USAGE_STATS_USAGE_STATS_UPLOADER_H_
#define MOZC_USAGE_STATS_USAGE_STATS_UPLOADER_H_

#include <map>
#include <string>
#include <vector>
#include "base/port.h"

namespace mozc {
namespace usage_stats {
class UploadUtil;

class ClientIdInterface {
 public:
  ClientIdInterface();
  virtual ~ClientIdInterface();

  // gets client id
  virtual void GetClientId(string *output) = 0;
};

class UsageStatsUploader {
 public:
  // Default values for scheduler.
  static const uint32 kDefaultSchedulerDelay;
  static const uint32 kDefaultSchedulerRandomDelay;
  static const uint32 kDefaultScheduleInterval;
  static const uint32 kDefaultScheduleMaxInterval;

  // Scheduler callback
  // Sends daily usage stats
  // Is called periodically (is not necessarily called 'daily')
  // parameter 'data' is not used here
  // (for interface compatibility with scheduler)
  //
  // NOTE:
  //  This function is called from another thread.
  //  So this should be thread-safe.
  static bool Send(void *data);

  // Sets client id handler
  static void SetClientIdHandler(ClientIdInterface *client_id_handler);

 protected:
  static void LoadStats(UploadUtil *uploader);

  // Gets client id
  static void GetClientId(string *output);

  DISALLOW_IMPLICIT_CONSTRUCTORS(UsageStatsUploader);
};

}  // namespace usage_stats
}  // namespace mozc

#endif  // MOZC_USAGE_STATS_USAGE_STATS_UPLOADER_H_