/** Local voice engine contract (sherpa-onnx in a utility process). Shared by main and renderer. */

export type VoiceModelKind = 'stt' | 'tts';
export type VoiceEngineKind = 'whisper' | 'sense-voice' | 'nemo-transducer' | 'kokoro' | 'piper';

export interface VoiceSpeaker {
  id: number;
  name: string;
  lang: string;
}

export interface VoiceModelSpec {
  id: string;
  kind: VoiceModelKind;
  engine: VoiceEngineKind;
  name: string;
  description: string;
  languages: string[];
  sizeMb: number;
  url: string;
  /** Folder created by the archive (files are referenced relative to it). */
  dir: string;
  /** Files that must exist once installed. */
  files: string[];
  speakers?: VoiceSpeaker[];
  sampleRate?: number;
  recommended?: boolean;
}

export interface VoiceModelStatus extends VoiceModelSpec {
  installed: boolean;
  downloading: boolean;
  installedBytes: number;
}

export interface VoiceDownloadProgress {
  id: string;
  phase: 'download' | 'extract' | 'done' | 'error' | 'cancelled';
  received: number;
  total: number;
  percent: number;
  message?: string;
}

export interface TranscribeRequest {
  modelId: string;
  wav: Uint8Array;
  language: string; // 'fr', 'en', 'auto'
}

export interface TranscribeResult {
  text: string;
  language?: string;
  durationMs: number;
  audioSec: number;
}

export interface SynthesizeRequest {
  modelId: string;
  text: string;
  speaker: number;
  speed: number;
}

export interface SynthesizeResult {
  wav: Uint8Array;
  sampleRate: number;
  durationMs: number;
  audioSec: number;
}

export interface VoiceEngineStatus {
  available: boolean;
  error?: string;
  version?: string;
  loaded: string[];
  modelsDir: string;
}

export const VOICE_IPC = {
  status: 'voice:status',
  modelsList: 'voice:models:list',
  modelsDownload: 'voice:models:download',
  modelsCancel: 'voice:models:cancel',
  modelsRemove: 'voice:models:remove',
  modelsProgress: 'voice:models:progress',
  transcribe: 'voice:transcribe',
  synthesize: 'voice:synthesize',
  unload: 'voice:unload'
} as const;