const config = require('../config');
const got = require('got');
const con = require('../db/connect');

module.exports = async() => {
    const ip = config.ip;
    let bufferTime = [];
    let bufferEpcHex = [];
    let interval;
    let jsonMessage;

    console.log('--START BACKEND--');

    const stream = await got.stream(`http://${ip}/api/v1/data/stream`);
    stream
        .on('data', value => {
        // value = '{"timestamp":"2022-07-27T11:57:39.226680176Z","tagInventoryEvent":{"epc":"qrsAAAAAAAAFdgQg","epcHex":"AABB00000000000005760420","pc":"MAA=","antennaPort":4,"antennaName":"4","peakRssiCdbm":-7600,"lastSeenTime":"2022-07-27T11:57:39.041444Z","phaseAngle":46.05}}'
            let buffer = value.toString();
            buffer = buffer.split('\n');
            for (let result of buffer) {
                if (result && /{.*:{.*:.*}}/.test(result)) {
                    const jsonResult = JSON.parse(result);
                    let epcHex = jsonResult?.tagInventoryEvent?.epcHex;

                    if (!epcHex) return;
                    if (epcHex.search('AABB') == -1) return;

                    // console.log(epcHex)
                    epcHex = epcHex.replace('AABB', '');
                    const existEpcHex = element => element == epcHex;
                    const bufferIndex = bufferEpcHex.findIndex(existEpcHex);

                    if (bufferIndex >= 0)
                        return bufferTime[bufferIndex].count = bufferTime[bufferIndex].count + 1;

                    const newObject = {
                        code: epcHex,
                        created: jsonResult.timestamp,
                        peakRssi: jsonResult.tagInventoryEvent.peakRssiCdbm,
                        count: 1
                    };

                    bufferEpcHex.push(epcHex);
                    bufferTime.push(newObject);
                    insertLog(bufferTime);

                    if (interval) {
                        clearInterval(interval);
                        interval = null;
                    }
                    interval = setInterval(insertDB, 10000);
                }
            }
        });
    /* .on("close", () => {
            console.log('CLOSE_STREAM')
        })*/

    async function insertDB() {
        clearInterval(interval);

        interval = null;
        // console.log('--INSERT IN DB--');
        // console.log(bufferEpcHex, bufferTime);

        let rfids = [];
        let response;
        for (let code of bufferEpcHex) {
            while (code.substring(0, 1) == 0)
                code = code.substring(1);

            rfids.push(parseInt(code));
        }

        // console.log('rfids', rfids)
        rfids = await cleanDev(rfids);
        if (!rfids.length) return console.log({error: 'NOT_PARSED_RFIDS', rfids});

        // response = await con.query(`CALL vn.pallet_build(JSON_ARRAY(?),?,@pallet);SELECT @pallet;`, params);
        response = await con.query(`CALL vn.pallet_build(JSON_ARRAY(?), ?, @pallet);SELECT @pallet;`, [rfids, 19294]);
        console.log(response);
        console.log(response[0][1][0]['@pallet']);

        // console.log(response)
        // console.log(response[1]);
        bufferTime = [];
        bufferEpcHex = [];
        const pallet = response[0][1][0]['@pallet'];
        if (pallet) {
            console.log('CALL TO PRINT');
            const print = await con.query(`CALL vn.expeditionPallet_printLabel(?);`, [pallet]);
            // console.log('print', print)
            jsonMessage = {pallet: pallet, print: print};
            // stream.destroy();
            console.log(jsonMessage);
        } else
            console.log({error: 'ERROR_CREATING_PALLET', expeditions: rfids});
    }

    async function insertLog() {
        const sql = `INSERT INTO lastRFID (code, antennaFk, isConsulted, isChoosed, antennaPort, peakRssi, seenCount)
            VALUES(?, 5, 1, 0, 1, ?, ?);`;

        for (let rfid of bufferTime) {
            const response = await con.query(sql, [rfid.code, rfid.peakRssi, rfid.count]);
            // console.log('insertLog', response, [rfid.code, rfid.peakRssi, rfid.count])
        }
    }

    async function cleanDev(ids) {
        if (config.env != 'dev') return ids;
        const sql = `SELECT id FROM vn.expedition WHERE id = ?`;

        const idsCleaned = [];
        for (let id of ids) {
            const [response] = await con.query(sql, [id]);
            console.log('cleanDev', response);
            if (response.length > 0)
                idsCleaned.push(id);
        }

        return idsCleaned;
    }
};