import { normalizeOptionalString } from "../shared/string-coerce.js";

import { getFileExtension, normalizeMimeType } from "./mime.js";

export const TELEGRAM_VOICE_AUDIO_EXTENSIONS = new Set([".oga", ".ogg", ".opus", ".mp3", ".m4a"]);

export const VOICE_MESSAGE_AUDIO_EXTENSIONS = new Set([".oga", ".ogg", ".opus", ".mp3", ".m4a"]);

/**

* MIME types compatible with voice messages.

* Telegram sendVoice supports OGG/Opus, MP3, and M4A.

* https://core.telegram.org/bots/api#sendvoice

*/

export const TELEGRAM_VOICE_MIME_TYPES = new Set([

export const VOICE_MESSAGE_MIME_TYPES = new Set([

"audio/ogg",

"audio/opus",

"audio/mpeg",

"audio/m4a",

]);

export function isTelegramVoiceCompatibleAudio(opts: {

export function isVoiceMessageCompatibleAudio(opts: {

contentType?: string | null;

fileName?: string | null;

}): boolean {

const mime = normalizeMimeType(opts.contentType);

if (mime && TELEGRAM_VOICE_MIME_TYPES.has(mime)) {

if (mime && VOICE_MESSAGE_MIME_TYPES.has(mime)) {

return true;

}

const fileName = normalizeOptionalString(opts.fileName);

if (!ext) {

return false;

}

return TELEGRAM_VOICE_AUDIO_EXTENSIONS.has(ext);

return VOICE_MESSAGE_AUDIO_EXTENSIONS.has(ext);

}

/**

* Backward-compatible alias used across plugin/runtime call sites.

* Keeps existing behavior while making Telegram-specific policy explicit.

*/

export function isVoiceCompatibleAudio(opts: {

contentType?: string | null;

fileName?: string | null;

}): boolean {

return isTelegramVoiceCompatibleAudio(opts);

return isVoiceMessageCompatibleAudio(opts);

}