const MODEL_PATH = "/opt/iobroker/iobroker-data/vosk-model-small-ru-0.15/";
const SAMPLE_RATE = 32000;
var vosk = require("vosk");
vosk.setLogLevel(-1);
const model = new vosk.Model(MODEL_PATH);
const rec = new vosk.Recognizer({model: model, sampleRate: SAMPLE_RATE});

onStop(function (callback) {
    rec.free();
    log('stop');
}, 2000);

on({id: "telegram.0.communicate.pathFile", ack: false, change: 'any'}, function (obj) {
    const msg = JSON.parse(getState("telegram.0.communicate.requestRaw").val);
    const user = msg.from.first_name;
    log(msg);
    if (msg.voice) {
        const voiceFile = obj.state.val;
        log(voiceFile);

        const { spawn } = require("child_process");
        log('start');

        const ffmpegCommand = `-y -i ${voiceFile} -ar ${SAMPLE_RATE} -vn -ac 1 -f s16le -`;
        const ffmpeg = spawn('ffmpeg', (ffmpegCommand).split(' '), {});
        // таймер убиения процесса через 10 секунд (вдруг завис)
        const killTimer = setTimeout(function(){
            console.error('Kill ffmpeg!!!');
            ffmpeg.kill();
            //ffmpeg.kill('SIGTERM');
        }, 10000);
        const absKillTimer = setTimeout(function(){
            console.error('Absolutly kill ffmpeg!!!');
            ffmpeg.kill('SIGKILL');
        }, 50000);
        const buf = [];
        ffmpeg.stdout.on('data', function(data){
            log('get data');
            buf.push(data);
        });
        ffmpeg.stderr.on('data', function(data){
            log('error');
            log(data.toString());
        });
        ffmpeg.on('close', function(code) {
            log('close');
            clearTimeout(killTimer);
            clearTimeout(absKillTimer);
            rec.acceptWaveform(Buffer.concat(buf));
            log('get res');
            const res = rec.finalResult();
            log(res);
            if (res && res.text != "") {
                log(res.text);
                sendTo('telegram.0', {
                    user: user,
                    text: res.text
                });
            }
        });
    }
});