import sdk from 'microsoft-cognitiveservices-speech-sdk'

import fs from 'fs'

import sound from 'sound-play'

const speakQueue: string[] = []

export const speak = (text: string) => {

if (speakQueue.length > 0) {

speakQueue.push(text)

} else {

speakQueue.push(text)

processQueue()

}

}

export const processQueue = async () => {

if (speakQueue.length > 0) {

const text = speakQueue[0]

await actualSpeak(text)

speakQueue.shift()

await processQueue()

}

}

export const actualSpeak = async (text: string) => {

try {

await new Promise<void>((resolve) => {

const audioFile = './dist/_.wav'

const speechConfig = sdk.SpeechConfig.fromSubscription(

process.env.AZURE_SPEECH_KEY,

process.env.AZURE_SPEECH_REGION

)

const audioConfig = sdk.AudioConfig.fromAudioFileOutput(audioFile)

speechConfig.speechSynthesisVoiceName = process.env.AZURE_SPEECH_VOICE

let synthesizer = new sdk.SpeechSynthesizer(speechConfig, audioConfig)

synthesizer.speakTextAsync(

text,

async (result) => {

synthesizer.close()

synthesizer = null

if (result.reason === sdk.ResultReason.SynthesizingAudioCompleted) {

const absoultePath = fs.realpathSync(audioFile)

await sound.play(absoultePath, 1)

} else {

throw new Error(

'Speech synthesis canceled, ' +

result.errorDetails +

'\nDid you set the speech resource key and region values?'

)

}

resolve()

},

(err) => {

console.trace('err - ' + err)

synthesizer.close()

synthesizer = null

resolve()

}

)

})

} catch (e) {}

}