let SelectedVoice = '';
let Encoding = '';
let counter = 0;
// wrap in promise
const speak = (textObject) => new Promise((resolve) => {
    // say.setEncoding(Encoding);
    counter += 1;
    let savePath = '';

    if (envInfo.env) {
        savePath = path.join(envInfo.path, './sounds/tts/internal_audio_' + counter + '.mp3')
    } else {
        savePath = path.join(__dirname, '../sounds/tts/internal_audio_' + counter + '.mp3')
    }

    say.export(textObject.filtered, SelectedVoice, 1, savePath, (err) => {
        if (err) {
            console.error(err);
        } else {
            sound.playAudio({ "path": savePath, "message": textObject });
        }
        resolve('finished');
    });
});

// queue system
class SayQueue {
    constructor() {
        this.messages = [];
        this.status = 0;
    }

    async shift() {
        this.status = 1;
        while (this.messages.length > 0) {
            await speak(this.messages.shift(), SelectedVoice, 1);
        }
        this.status = 0;
    }

    add(message, selectedVoice) {
        this.messages.push(message);
        SelectedVoice = selectedVoice;
        if (this.status === 0) { this.shift(); }
    }
}

const sayQueue = new SayQueue();
module.exports = sayQueue;