const path = require("path");
const fs = require('fs');

const tmpFile = "./tmp/script.js";

function findNames(dir, excluded) {
    let names = {};
    if (excluded.includes(dir)) {
        return names;
    }

    let files = fs.readdirSync(dir);
    files.forEach(file => {
        let stats = fs.statSync(dir + file);
        if (stats.isDirectory()) {
            let nameObject = findNames(dir + file + '/', excluded);
            names = Object.assign(names, nameObject);
        } else if ((file.endsWith(".ts") ) && !excluded.includes(dir + file)) {
            names[file.substring(0, file.length - 3)] = dir + file.substring(0, file.length - 3);
        }
        else if ((file.endsWith(".mjs") ) && !excluded.includes(dir + file)) {
            names[file.substring(0, file.length - 4)] = dir + file.substring(0, file.length - 4);
        }
    });
    return names;
}

async function buildEntryPoints(fileOption, target) {
    const cutLengthFront = 0;

    target = target || tmpFile;

    const resultDir = path.resolve(process.cwd(), path.dirname(target));

    let names = {};
    fileOption.input.forEach(dir => {
        Object.assign(names, findNames(dir + "/", []));
    });

    let imports = '';
    for (let k in names) {
        imports += "export * from './" + path.relative(resultDir, path.resolve(process.cwd(), names[k].substring(cutLengthFront))) + "';\n";
    }

    if (!fs.existsSync(resultDir)) {
        fs.mkdirSync(resultDir);
    }
    fs.writeFileSync(target, imports);
}

buildEntryPoints({
    input: [
        path.resolve(process.cwd(), "src/"),
    ],
}, "./src/hotkeys.ts");