const refConfig = require('./config.default.json');
const fs = require('fs');

/**
 * Merge resources by reading object keys and keeping reference value only if it's type is different from the source
 * @param ref - reference object/value
 * @param src - source object/value
 * @returns {*}
 */
const merge = (ref, src) => {
    if (typeof ref !== typeof src) {
        return ref;
    } else if (ref.length && !src.length) {
        return ref;
    } else if (ref.length && src.length) {
        return src;
    } else if (typeof ref === 'object') {
        const out = {};
        Object.keys(ref).forEach((key) => out[key] = merge(ref[key], src[key]));
        return out;
    } else {
        return src;
    }
};

module.exports = () => {
    try {
        let configData = fs.readFileSync('config.json', { encoding: 'UTF-8' });
        let config = JSON.parse(configData);
        return merge(refConfig, config);
    } catch (error) {
        console.log('\x1b[33m⚠\x1b[0m %s', 'Failed to load config.json : ' + error);
        return refConfig;
    }
};