async function talaSpeechSetup(locale, voice, region) {
  return await talaSpeechSetupInternal(locale, voice, region);
}

async function talaSpeechSetupInternal(locale, voice, region) {
  try {
    const urlLocale = locale ? locale : "en_US";
    const offerId = '844d0955-d52c-44d8-bdd4-7d26599b258f'; // Hard coded Sanity Offer ID provided by Jose in DevOps Issue #764
    var endpoint = `https://production-handler.function.cloud.pratb.art/interact/${offerId}?non_neural=1&locale=${urlLocale}&ndg=unknown&style=a Teacher`;

    await window.TalaSpeech.send({
      type: "SETUP",
      value: {
        deviceID: "talaspeech-devcube",
        endpoint: endpoint /** required */,
        azureRegion: region,
        azureCredentials:
          region == "northeurope"
            ? "https://tala.pratb.art/gettoken.php"
            : "https://tala.pratb.art/gettoken-swedencentral.php" /** required, <azure proxy URL or {key: "...",  endpoint: "..."}>*/,
        locale: locale ? locale.replaceAll("_", "-") : "en-US" /** default */,
        asrDefaultCompleteTimeout: 0 /** default */,
        asrDefaultNoInputTimeout: 5000 /** default */,
        ttsDefaultVoice: voice,
        ttsLexicon:
          locale == "sv_SE"
            ? "https://cvoiceprodneu.blob.core.windows.net/acc-public-files/33867cc7d3ce43b9a040dc16212a025e/9f6c85e1-4fe9-4268-b337-24015d30b46c.xml"
            : undefined,
        azureLanguageCredentials: undefined /** default, not supported by TDM*/,
        speechRecognitionEndpointId: undefined /** default */,
      },
    });
  } catch (error) {
    return "ERROR talaSpeechSetup";
  }
}

async function talaSpeechPrepare() {
  try {
    await window.TalaSpeech.send({ type: "PREPARE" });
  } catch (error) {
    return "ERROR talaSpeechPrepare";
  }
}

async function talaSpeechSpeak(utterance, voice) {
  try {
    await window.TalaSpeech.getSnapshot().context.spstRef.send({ type: "SPEAK", value: { utterance: utterance, voice: voice } });
  } catch (error) {
    return "ERROR talaSpeechStart";
  }
}

async function talaSpeechSpeakIncludingSetupAndPrepare(locale, utterance, voice, region) {
  await talaSpeechSetupInternal(locale, voice, region);
  if (window.TalaSpeechUIState !== 'ready') {
    await until((_) => window.TalaSpeechUIState === 'before-prepare');
    await talaSpeechPrepare();
  }
  await until((_) => window.TalaSpeechUIState === 'ready');
  await talaSpeechSpeak(utterance, voice);

  // TODO: Replace this 3000ms setTimeout with a proper await for the SPEAK command
  await new Promise(resolve => setTimeout(resolve, 3000));

  return 'DONE';
}

const until = async (fn, time = 1000, wait = 10000) => {
  const startTime = new Date().getTime()
  for (;;) {
    try {
      if (await fn()) {
        return true
      }
    } catch (e) {
      throw e
    }

    if (new Date().getTime() - startTime > wait) {
      throw new Error('Max wait reached')
    } else {
      await new Promise((resolve) => setTimeout(resolve, time))
    }
  }
}

function reloadWindow() {
  window.location.reload();
}

function consoleLog(msg) {
  window.console.log(msg);
}

function historyBack() {
  window.history.back();
}