try {
    const sslangs = require('./languages.json');

    const diacritics = require('./diacritics');
    const count = require('./counter');
    const percentages = require('./percentages');
    const save = require('./savers');
    const worder = require('./words');

    const fs = require('fs');

    class LangdetectError extends Error {
        constructor(...params) {
            super(...params)
            // We're spreading `params` as a way to bring all of `Error`'s functionality in.
        }
    }

    if (typeof process.argv[2] == "undefined" || typeof process.argv[3] == "undefined") {
        throw new LangdetectError("args: Missing operand");
    }

    sslangs.forEach((lg) => {
        if (process.argv[3] == lg.code) {
            plang = lg.name;
            lit = lg;
        }
    })

    if (typeof plang == "undefined") {
        throw new LangdetectError("lang: Invalid language");
    }

    console.log("Decomposing text... This will take a while for long texts!");
    clean = diacritics(process.argv[2].toLowerCase());
    cleaner = clean.replace(/[^a-zA-Z]/g, "");
    cleaner2 = clean.replace(/[^a-zA-Z ]/g, "");
    letters = cleaner.split("");
    words = worder(cleaner2, lit);
    console.log("Text contains " + letters.length + " letters");
    console.log("Calculating percentage for all letters...");
    qty = count(letters);
    if (qty.total != letters.length) {
        console.log("WARNING: " + (letters.length - qty.total) + " characters were not included while counting all letters. This is probably a bug and should be reported.");
    }
    percs = percentages(qty);
    console.log("According to parameter, this is " + plang + " (langcode: " + process.argv[3] + "), so let's add this to the database");

    if (fs.existsSync("./data/" + process.argv[3] + ".dat")) {
        console.log("Database " + process.argv[3] + ".dat exists, loading it");
    } else {
        console.log("Database " + process.argv[3] + ".dat doesn't exists, creating it");
        fs.writeFileSync("./data/" + process.argv[3] + ".dat", "{\"a\":{\"entries\":[],\"average\":0},\"b\":{\"entries\":[],\"average\":0},\"c\":{\"entries\":[],\"average\":0},\"d\":{\"entries\":[],\"average\":0},\"e\":{\"entries\":[],\"average\":0},\"f\":{\"entries\":[],\"average\":0},\"g\":{\"entries\":[],\"average\":0},\"h\":{\"entries\":[],\"average\":0},\"i\":{\"entries\":[],\"average\":0},\"j\":{\"entries\":[],\"average\":0},\"k\":{\"entries\":[],\"average\":0},\"l\":{\"entries\":[],\"average\":0},\"m\":{\"entries\":[],\"average\":0},\"n\":{\"entries\":[],\"average\":0},\"o\":{\"entries\":[],\"average\":0},\"p\":{\"entries\":[],\"average\":0},\"q\":{\"entries\":[],\"average\":0},\"r\":{\"entries\":[],\"average\":0},\"s\":{\"entries\":[],\"average\":0},\"t\":{\"entries\":[],\"average\":0},\"u\":{\"entries\":[],\"average\":0},\"v\":{\"entries\":[],\"average\":0},\"w\":{\"entries\":[],\"average\":0},\"x\":{\"entries\":[],\"average\":0},\"y\":{\"entries\":[],\"average\":0},\"z\":{\"entries\":[],\"average\":0},\"words\":[]}")
    }
    save(percs, words, "./data/" + process.argv[3] + ".dat");
} catch (e) {
    if (e.message == "Unexpected end of JSON input") {
        console.log("Unable to open database file. Is the databased opened by another program? Or is it corrupted?");
    } else {
        throw e;
    }
}