export function importDataSet(filePaths, fileType) {
  return (dispatch, getState) => {
    //const {timePeriod} = getState().main;

    Promise.all(filePaths.map((item, i) => {
      return SomeFormatDataReader(item);
    })).then((results) => {
      results.map((item, i) => {
        saveDataSet(item);
      });
      console.log(results);
    });

    //const totalRows = result.columns.length * result.columns[0].length;
  }
}

function saveDataSet(data) {
  return Promise.all(data.columns.map((item, i) => {
    if (i > 0 && item.name !== '') {
      return db.DataSet.findOrCreate({
        where: {name: item.name},
        defaults: {
          name: item.name,
          si: item.si,
        }
      }).then((dataSet) => {
        saveDataSetValue(dataSet[0].id, data.columns[0].values, data.columns[i].values);
      }).catch((e) => {
        console.log('DataSet: ' + e.result.trace());
      });
    }
  }));
}

function saveDataSetValue(dataSetId, times, values) {
  db.disableLogging = true;
  return Promise.all(values.map((value, i) => {
    const time = times[i].format(formatSqlTime);
    return db.sequelize.query(`INSERT INTO DataSetValues (id, dataSetId, time, value) VALUES (NULL,${dataSetId},'${time}', ${value});`, {raw: true});
  })).then((results) => {
    db.disableLogging = false;
  });
}