Node.js 20+ ESM & TypeScript SDK (Native `fetch` + `FormData`)

import { readFile, writeFile } from 'node:fs/promises';
import path from 'node:path';

export interface TuneJobInput {
  filePath: string;
  ecuBrand: string;
  ecuFamily: string;
  fuelType?: 'diesel' | 'petrol';
  services?: string[];
  tuningOptions?: string[];
  dtcCodes?: string;
  webhookUrl?: string;
}

export class DaVinciCloudSDK {
  constructor(
    private readonly apiKey: string,
    private readonly baseUrl = 'https://www.davincideluxe.fr/api/v1/cloud'
  ) {}

  async createJob(input: TuneJobInput) {
    const buf = await readFile(input.filePath);
    const fd = new FormData();
    fd.append('file', new Blob([buf]), path.basename(input.filePath));
    fd.append('ecu_brand', input.ecuBrand);
    fd.append('ecu_family', input.ecuFamily);
    if (input.fuelType) fd.append('fuel_type', input.fuelType);
    if (input.services?.length) fd.append('services', JSON.stringify(input.services));
    if (input.tuningOptions?.length) fd.append('tuning_options', JSON.stringify(input.tuningOptions));
    if (input.dtcCodes) fd.append('dtc_codes', input.dtcCodes);
    if (input.webhookUrl) fd.append('webhook_url', input.webhookUrl);

    const res = await fetch(`${this.baseUrl}/jobs`, {
      method: 'POST',
      headers: { Authorization: `Bearer ${this.apiKey}` },
      body: fd
    });
    if (!res.ok) throw new Error(`HTTP ${res.status}: ${await res.text()}`);
    return res.json() as Promise<{ ok: boolean; job_id: string; status: string; status_url: string }>;
  }

  async downloadResult(jobId: string, destPath: string) {
    const res = await fetch(`${this.baseUrl}/jobs/${jobId}/result`, {
      headers: { Authorization: `Bearer ${this.apiKey}` }
    });
    if (!res.ok) throw new Error(`Download failed: ${res.status}`);
    const bytes = new Uint8Array(await res.arrayBuffer());
    await writeFile(destPath, bytes);
    return bytes.byteLength;
  }
}