const TASK = {
  taskType: 'media-sync'
};

function registerMediaSyncTask(options) {
  const backgroundTaskQueue = options && options.backgroundTaskQueue;
  const uploadSyncService = options && options.uploadSyncService;
  const runMediaSyncTask = uploadSyncService && uploadSyncService.runMediaSyncTask;

  if (!backgroundTaskQueue || typeof runMediaSyncTask !== 'function') {
    throw new Error('registerMediaSyncTask requires the media sync dependencies.');
  }

  // Media sync is just a pass-through to the shared media sync runner.
  backgroundTaskQueue.setTaskHandler(TASK.taskType, function (task) {
    return runMediaSyncTask(task && task.payload ? task.payload : task);
  });
}

module.exports = { registerMediaSyncTask };