// node --require regenerator-runtime/runtime --require ./babel-local search.js ..\out result.csv

import {promises} from 'fs';
import {resolve} from 'path';
import {eachFormElement, eachItem, eachVestnik} from './lib/read';

const {writeFile, truncate} = promises;

async function work (prefix, outfile) {
    console.info(`Input directory: ${prefix}`);
    await truncate(outfile);
    console.info(`Output file: ${outfile}`);
    for await (let vestnik of eachVestnik(prefix)) {
        for (let item of eachItem(vestnik)) {
            if (hasCpv("45", item)) {
                const v = oddiel_V(item);
                if (v) {
                    processV(v, item, async items => await writeFile(outfile, poorMansCsv(items) + "\r\n", {flag: "a"}));
                }
            }
        }
    }
}

function processV (v, item, out) {
    const zakazka = item.zakazka[0].$;
    const id = zakazka.id || '';
    const url = zakazka.url || "about:blank";
    const pocetPonuk = -1;
    const predpokladanaCena = '?';
    const konecnaCena = '?';
    const vitazIco = 0;

    out([id, url, pocetPonuk, predpokladanaCena, konecnaCena, vitazIco]);
}

function poorMansCsv (items) {
    return JSON.stringify(items).slice(1, -1);
}

function hasCpv (prefix, item) {
    for (let {tag, value, cancel} of eachFormElement(item)) {
        if (tag === "Part") {
            const match = value.$.Title && value.$.Title.match(/^ODDIEL\s+(\w+):/);
            if (match && match[1] !== "II") cancel();
        }
        if (tag === "Cpv" && value.$.Code.startsWith(prefix)) return true;
        if (tag === "SelectList" && value.$.Type === "CPV" && value.SelectListValue && value.SelectListValue[0].$.Title.startsWith(prefix)) return true;
    }
    return false;
}

function oddiel_V (item) {
    for (let {tag, value, cancel} of eachFormElement(item)) {
        if (tag === "Part") {
            const match = value.$.Title && value.$.Title.match(/^ODDIEL\s+(\w+):/);
            if (match)
                if (match[1] === "V") return value; else cancel();
        }
    }

    return null;
}

work(resolve(process.argv[2] || ''), resolve(process.argv[3] || 'result.csv'))
    .catch(error => console.error(error));