const glob = require('glob');
const ROOT = 'root';
const EXT = 'ext';

function getSettings (argv) {
    return argv.reduce((params, arg, i, all) => {
        if (arg.indexOf('--') === 0 && all[i + 1]) {
            params[arg.slice(2)] = all[i + 1];
        }

        return params;
    }, {});
}

function checkSettings(settings) {

    if (!settings[ROOT]) {
        throw 'Please provide the root path for search';
    }

    if (!settings[EXT]) {
        throw 'Please provide file extention that have to be searched';
    }

    return true;
}

function getRootFolders(paths, root) {
    const roots = {};
    let counter = 0;

    paths.forEach(path => {

        const rootFolder = path.replace(root, '').replace(/^\//ig, '').split('/')[0];

        if (typeof roots[rootFolder] !== 'undefined') {
            roots[rootFolder] += 1;
            counter += 1;
        } else {
            roots[rootFolder] = 1;
        }
    });

    return {
        counter,
        folders: roots
    }
}


const settings = getSettings(process.argv);

if (checkSettings(settings)) {
    const root = settings[ROOT].replace(/\/$/ig, '');

    glob(`${root}/**/*.${settings[EXT]}`, null, (er, files) => {
        const {counter, folders} = getRootFolders(files, root);
        console.log('total amount:', counter);
        console.log('');
        console.log('folders:', folders)
    })
}