const jsonfile = require('jsonfile');
const config = require('../../config/config.json');
const Fitbit = require('fitbit-oauth2');

const logger = require('log4js').getLogger();

require('sugar-date');

const fitbit = new Fitbit(config.fitbit);
const tokenFile = 'fb-token.json';

module.exports = {

  getYesterdayFitbit: function() {
    return new Promise(function(resolve, reject) {
      const yesterday = Date.create('yesterday').format('{yyyy}-{MM}-{dd}');
      const url = 'https://api.fitbit.com/1/user/-/activities/date/' + yesterday + '.json';

logger.info('Getting fitbit for: ', yesterday);
      logger.debug(url);
      fitbit.request({
              uri: url,
              method: 'GET'
          }, function( err, body, token ) {
              if ( err ) {
                return reject(err);
              }
              const profile = JSON.parse(body);
              // if token is not null, a refesh has happened and we need to persist the new token
              if ( token )
                  jsonfile.writeFile(tokenFile, token, function( err ) {
                      if ( err ) {
                        return reject(err);
                      }
                    return resolve(profile);
                  });
              else
              {
                return resolve(profile);
              }
          });

    });
  }
};

jsonfile.readFile(tokenFile, function(err, obj) {
  if (err) {
    logger.error('Today Fitbit token failed to load');
    logger.warn(err);

  }
  else {
    logger.info('Fitbit token loaded...');
    fitbit.setToken(obj);

  }
});