backend/src/services/whatsappCloudClient.js

import axios from "axios";
import axiosRetry from "axios-retry";
import { config } from "../config/index.js";

function client() {
  const instance = axios.create({
    baseURL: `https://graph.facebook.com/${config.whatsapp.apiVersion}`,
    timeout: 15_000,
    headers: { Authorization: `Bearer ${config.whatsapp.token}` }
  });

  axiosRetry(instance, {
    retries: 2,
    retryDelay: axiosRetry.exponentialDelay,
  
    retryCondition: (error) => !error.response && (error.code === "ECONNABORTED" || axiosRetry.isNetworkError(error))
  });

  return instance;
}

export async function enviarTexto(paraTelefone, texto) {
  const { data } = await client().post(`/${config.whatsapp.phoneNumberId}/messages`, {
    messaging_product: "whatsapp",
    recipient_type: "individual",
    to: paraTelefone,
    type: "text",
    text: { preview_url: false, body: texto }
  });
  return data;
}

export async function obterUrlMidia(mediaId) {
  const { data } = await client().get(`/${mediaId}`);
  return data;
}

export async function baixarBytesMidia(url) {
  
  const { data, headers } = await client().get(url, { responseType: "arraybuffer" });
  return { buffer: Buffer.from(data), mimetype: headers["content-type"] ?? null };
}

export async function obterInfoNumero() {
  const { data } = await client().get(`/${config.whatsapp.phoneNumberId}`, {
    params: { fields: "verified_name,display_phone_number,quality_rating" }
  });
  return data;
}