const net = require('net');
const { sleep } = require('../libs/util');
const Message = require('./Message');

class Audiostream {

    constructor(eventParser) {
        this.eventParser = eventParser;
        this.#handleEvents();
    }

    getHost() {
        return this.host;
    }

    getPort() {
        return this.port;
    }

    getTag() {
        return this.getHost() + ':' + this.getPort();
    }

    #initialize(data) {
        this.host = config?.server?.host || "127.0.0.1";
        this.port = data.port;
        this.clientId = data.clientId;
        this.size = data.size;
        this.threshold = data.threshold;
        this.#handleSocket(net.connect({
            host: this.getHost(),
            port: this.getPort()
        }));
    }

    #handleEvents() {
        this.eventParser.on('audio:initialize', (data) => {
            logger.debug('handling event \'audio:initialize\'...');
            this.#initialize(data);
        });
        this.eventParser.on('audio:play', (data) => {
            logger.debug('handling event \'audio:play\'...');
            global.player.play(data?.position);
        });
        this.eventParser.on('audio:pause', (data) => {
            logger.debug('handling event \'audio:pause\'...');
            global.player.pause();
        });
        this.eventParser.on('audio:stop', () => {
            logger.debug('handling event \'audio:stop\'...');
            global.player.stop();
        });
        global.player.on('statechange', (data) => {
            new Message('audio:state', {
                clientId: this.clientId,
                state: data.state,
                position: global.player.getPosition()
            }).send();
        });
    }

    #handleSocket(socket) {
        socket.on('connect', async () => {
            logger.debug('connected to audio server \'' + this.getTag() + '\'...');
            await global.player.prepare(this.size, this.threshold);
            new Message('audio:register', { clientId: this.clientId, port: socket.localPort }).send();
        });
        socket.on('error', (error) => {
            logger.error('error connecting to audio server \'' + this.getTag() + '\': ' + error);
        });
        socket.on('timeout', () => {
            logger.warn('connection to audio server \'' + this.getTag() + '\' timed out');
        });
        socket.on('data', (data) => {
            global.player.feed(data);
        });
        socket.on('end', () => {
            logger.info('connection to audio server \'' + this.getTag() + '\' ended');
        });
        socket.on('close', () => {
            logger.info('connection to audio server \'' + this.getTag() + '\' closed');
            global.player.stopFeed();
        });
    }
}

module.exports = Audiostream;