const Heartbeat = require('./Heartbeat.js');

let clientId = -1;

class Client {

    constructor(socket) {
        clientId++;
        this.id = clientId;
        this.socket = socket;
        this.heartbeat = new Heartbeat(this);
        this.#listenForEvents();
    }

    getId() {
        return this.id;
    }

    getAddress() {
        return this.socket.remoteAddress;
    }

    getPort() {
        return this.socket.remotePort;
    }

    getTag() {
        return '[' + this.getId() + '] ' + this.getAddress() + ':' + this.getPort() + ' >>';
    }

    #listenForEvents() {
        logger.debug(this.getTag() + ' connected to communication server...');
        this.socket.on('close', () => {
            this.#handleEventClose()
        });
        this.socket.on('end', () => {
            this.#handleEventEnd()
        });
        this.socket.on('error', (error) => {
            this.#handleEventError(error);
        });
        this.socket.on('data', (data) => {
            this.#handleEventData(data, this.socket)
        });
        this.heartbeat.on('timeout', () => {
            this.#handleEventHeartbeatTimeout();
        });
        this.heartbeat.on('network-statistics', (data) => {
            this.#handleEventNetworkStatistics(data);
        });
    }

    #handleEventClose() {
        logger.debug(this.getTag() + ' closed socket to communication server');
        server.removeClient(this);
    }

    #handleEventEnd() {
        logger.debug(this.getTag() + ' ended socket to communication server');
        this.destroy();
    }

    #handleEventError(error) {
        if (error === undefined) {
            return;
        }
        logger.debug(this.getTag() + ' encountered an error: ' + error);
    }

    async #handleEventData(data) {
        eventparser.parse(data);
    }

    #handleEventHeartbeatTimeout() {
        logger.warn(this.getTag() + ' heartbeat timed out');
        this.destroy();
    }

    #handleEventNetworkStatistics(data) {
        logger.debug(this.getTag() + ' network statistics: ' + JSON.stringify(data));
    }

    destroy() {
        this.heartbeat.destroy();
        this.heartbeat.removeAllListeners('timeout');
        this.heartbeat.removeAllListeners('latency');
        this.socket.end();
        this.socket.destroy();
    }

}

module.exports = Client;