const EventEmitter = require('events');

class LocalRadioPlayer extends EventEmitter {
    constructor() {
        super();
        this._stations = {
            'Rock': 'http://localhost:8000/rock',
            'Pop': 'http://localhost:8000/pop',
            'Jazz': 'http://localhost:8000/jazz',
            'Classical': 'http://localhost:8000/classical',
            'Electronic': 'http://localhost:8000/electronic',
            'Hip-Hop': 'http://localhost:8000/hiphop'
        };
        this._audio = null;
    }

    getStations(options) {
        return Promise.resolve(Object.keys(this._stations).map(genre => ({
            name: genre,
            id: genre
        })));
    }

    play(stationData) {
        if (this._audio) {
            this._audio.pause();
        }
        const streamUrl = this._stations[stationData.id];
        if (!streamUrl) {
            this.emit('error', new Error(`Station ${stationData.id} not found.`));
            return;
        }

        this._audio = new Audio(streamUrl);
        this._audio.play()
            .then(() => {
                this.emit('song-data', {
                    title: `Streaming ${stationData.id}`,
                    artist: 'Local Radio',
                    albumArt: ''
                });
            })
            .catch(err => {
                this.emit('error', err);
            });
    }

    stop() {
        if (this._audio) {
            this._audio.pause();
            this._audio = null;
        }
    }

    resizeArtwork(options) {
        // Not applicable for local streaming without metadata
        return Promise.resolve('');
    }
}

module.exports = LocalRadioPlayer;