const Client = require('./Client.js');
const AudioServer = require('./AudioServer.js');
const net = require('net');

class Server {

    constructor() {
        this.listen = config?.server?.listen || '0.0.0.0';
        this.port = config?.server?.port || 0;
        this.clients = [];
        this.server = net.createServer();
    }

    start() {
        return new Promise((resolve, reject) => {
            this.server.listen(this.port, this.listen).on('listening', () => {
                this.port = this.server.address().port;
                logger.info('communication server listening on ' + this.listen + ':' + this.port + '...');
                resolve();
            });
            this.server.on('connection', (socket) => {
                this.#addClient(socket);
            });
            this.server.on('error', (err) => {
                reject('an unexpected error occured: ' + err);
            });
        });
    }

    stop() {
        if (this.server === undefined) {
            return;
        }
        for (let index = 0; index < this.connections.length; index++) {
            this.connections[index].destroy();
        }
        return new Promise((resolve, reject) => {
            this.server.close();
            this.server = undefined;
            resolve();
        });
    }

    #addClient(socket) {
        this.clients.push(new Client(socket));
    }

    removeClient(client) {
        client.destroy();
        this.clients.splice(this.clients.indexOf(client), 1);
    }

    getClientById(clientId) {
        if (clientId === undefined) {
            return;
        }
        for (let index = 0; index < this.clients.length; index++) {
            const client = this.clients[index];
            if (client.id !== clientId) {
                continue;
            }
            return client;
        }
    }

}

module.exports = Server;