let fs = require('fs');
let { logger } = require('./logging');

let loadedConfigs = new Map();

function sanitizeConfig(config, fields=[]) {
    let clonedConfig = { ...config };
    fields.forEach((field) => {
        clonedConfig[field] = '******'
    })
    return clonedConfig;
}

function getConfig(configFile, sanitizedFields=[], reload=false) {
    if (loadedConfigs.has(configFile) && !reload) {
        return loadedConfigs.get(configFile);
    } else {
        logger.info("Reading config: %s", configFile);
        let rawConfigData = fs.readFileSync(configFile);
        let config = JSON.parse(rawConfigData);
        logger.info("Loaded config: %s", configFile);
        logger.debug("%o", sanitizeConfig(config, sanitizedFields));
        loadedConfigs.set(configFile, config);
        return config;
    }
}

exports.getConfig = getConfig