const logger = require('./libs/logger.js');
const packageJSON = require('./package.json');
const server = require('./libs/server.js');
const path = require('path');

const INTERRUPTS = ['beforeExit', 'SIGINT', 'SIGTERM'];

main();

async function main() {
    let configPath = path.resolve(process.argv[2] || __dirname + '/config.json');
    try {
        global.config = require(configPath);
    } catch (err) {
        logger.warn('could not read config file at \'' + configPath + '\'');
    }
    logger.initialize();
    handleExit();
    logger.info("launching " + packageJSON.name + " " + packageJSON.version + "...");
    try {
        await server.start();
    } catch (err) {
        exit(err);
    }
};

function handleExit() {
    for (var index = 0; index < INTERRUPTS.length; index++) {
        process.on(INTERRUPTS[index], async (code) => {
            exit(undefined, code);
        });
    }
}

function exit(err, code) {
    if (code === undefined) {
        code = 0;
        if (err !== undefined) {
            code = 1;
        }
    }
    if (err) {
        logger.error(err);
        logger.error(packageJSON.name + ' ' + packageJSON.version + ' ended due to an error');
    } else {
        logger.info(packageJSON.name + ' ' + packageJSON.version + ' shutting down gracefully')
    }
    process.exit(code);
}