let { logger } = require('./logging');
let { modules } = require('./module/index')

class Engine {
    constructor(config, bot, modules) {
        this.config = config
        this.bot = bot;
        this.modules = modules;
    }

    init() {
        logger.info("Initializing modules");
        this.initModules();

        /* Bind Message Parsing */
        let handleMessages = function (event, room, toStartOfTimeline) {
            if (event.getType() !== "m.room.message") {
                logger.debug("Recieved message of type: %s", event.getType());
                return; // only use messages
            }
            logger.debug("[%s] %s", room.name, event.event.content.body);
        }

        this.bot.init(handleMessages);

        /* Capture Exit Conditions */

        ["SIGINT", "SIGTERM"].forEach((signature) => {
            process.on(signature, async () => {
                await this.bot.sendStatusShutdown()
                    .then(() => {
                        logger.info("Gracefully stopping Matrix SDK Client")
                        this.bot.client.stopClient();
                    });
                process.exit(0);
            });
        });

        process.on('exit', () => {
            logger.info("Shutting Down");
        });

        return this;
    }

    initModules() {
        this.modules.forEach((module) => {
            logger.info("Loading module: %s", module.name);
        });
    }

    run() {
        this.bot.connect();
        return this;
    }
}

function create(config, bot) {
    return new Engine(config, bot, modules)
}

exports.create = create;