// api.js — conexión compartida al backend Gradio (chat / transcribe / speak).
import { Client } from "https://cdn.jsdelivr.net/npm/@gradio/client/dist/index.min.js";

let clientPromise = null;

export function getClient() {
  if (!clientPromise) {
    clientPromise = Client.connect(window.location.origin);
  }
  return clientPromise;
}

export async function transcribe(blob, ext, durationMs) {
  const client = await getClient();
  const audioFile = new File([blob], `audio.${ext}`, { type: blob.type });
  const r = await client.predict("/transcribe", { audio: audioFile, duration_ms: durationMs });
  return r.data?.[0] ?? {};
}

export async function chat(message, childAge = 3) {
  const client = await getClient();
  const r = await client.predict("/chat", { message, child_age: childAge });
  return r.data?.[0] ?? {};
}

export async function speak(text) {
  const client = await getClient();
  const r = await client.predict("/speak", { text });
  // FileData puede venir con .url o con .path (Gradio lo resuelve según versión)
  const fd = r.data?.[0];
  return fd?.url ?? fd?.path ?? "";
}