'use strict';

const { parseDoorLockDataFile, writeDoorLockEvent } = require("../services/doorLock");
const { officeRnDAPIErrors } = require('../constants/constants');

const IncomingForm = require('formidable').IncomingForm;

const uploadDoorLockData = (req, res) => {
    const form = new IncomingForm();
    const parsingResults = [];

    form.on('file', (field, file) => {
        if (file && file.type === 'text/csv') {
            parsingResults.push(parseDoorLockDataFile(file));
        }
    });

    form.on('end', () => {
        Promise.all(parsingResults)
            .then((parserResults) => {
                const parsedData = [];
                const parserErrors = [];
                const unknownMembers = [];

                parserResults.forEach((parserResult) => {
                    parsedData.push(...parserResult.parsedData);
                    parserErrors.push(...parserResult.errors);
                    unknownMembers.push(...parserResult.unknownMembers);
                });

                res.json({
                    parsedData,
                    parserErrors,
                    unknownMembers
                });

                parsedData.forEach((entry) => {
                    writeDoorLockEvent(entry);
                });
            })
            .catch(() => {
                res.status(500).send(officeRnDAPIErrors.FAILED_TO_FETCH_MEMBERS);
            });
    });

    form.parse(req);
};

module.exports = {
    uploadDoorLockData,
};