export interface AudioFeatures {
  duration: number;
  sampleRate: number;
  channels: number;
  rawPcm: Buffer;
}

export interface SyntheticDetectionResult {
  isSynthetic: boolean;
  confidence: number;
  score: number;
}

export interface VoiceMatchResult {
  similarity: number;
  matched: boolean;
}

export interface Embedding {
  vector: Float64Array;
  hash: string;
}

export async function preprocessAudio(audioBuffer: Buffer): Promise<AudioFeatures> {
  return {
    duration: 0,
    sampleRate: 16000,
    channels: 1,
    rawPcm: audioBuffer,
  };
}

export async function detectSynthetic(features: AudioFeatures): Promise<SyntheticDetectionResult> {
  return {
    isSynthetic: false,
    confidence: 1.0,
    score: 0.0,
  };
}

export async function matchVoice(embedding: Embedding, enrollmentId: string): Promise<VoiceMatchResult> {
  return {
    similarity: 0,
    matched: false,
  };
}

export async function generateEmbedding(features: AudioFeatures): Promise<Embedding> {
  const { createHash } = await import("node:crypto");
  const hash = createHash("sha256").update(features.rawPcm).digest("hex");

  return {
    vector: new Float64Array(256),
    hash,
  };
}
