const R       = require('ramda'),   // 0.26.1
      winston = require('winston'); // 2.4.x

const winstonConf = {
  transports : [
    {
      transportType : 'console'
    }
  ],
  strategies : {
    console : winston.transports.Console
  }
};

const getTransportInstances = R.curry((winstonConf, transportConfig) => {
  const transportConstructor = winstonConf.strategies[transportConfig.transportType];
  return new (transportConstructor)(transportConfig);
});

const logger = new (winston.Logger)({
  transports : winstonConf.transports.map(getTransportInstances(winstonConf))
});

const appendMetaToEveryLog = (logType, meta) => {
  return R.partialRight(R.bind(logger[logType], logger), [{ meta }]);
};

const decorateInfoLogForPerformanceMetrics = meta => R.compose(
  R.partial(appendMetaToEveryLog('info', meta)),
  R.append(R.__, []),
  R.concat('PERFORMANCE TIMER ')
);

module.exports = meta => ({
  error          : appendMetaToEveryLog('error', meta),
  info           : appendMetaToEveryLog('info',  meta),
  debug          : appendMetaToEveryLog('debug', meta),
  warn           : appendMetaToEveryLog('warn',  meta),
  perfStart      : decorateInfoLogForPerformanceMetrics(meta)('START'),
  perfEndSuccess : decorateInfoLogForPerformanceMetrics(meta)('END (SUCCESS)'),
  perfEndFail    : decorateInfoLogForPerformanceMetrics(meta)('END (FAIL)')
});