#!/usr/bin/env node
// Downloads the Jortt OpenAPI specification into src/openapi.json so it can be
// bundled with the build. Run automatically by `npm run build`.
import { writeFile, mkdir } from "node:fs/promises";
import { dirname, join } from "node:path";
import { fileURLToPath } from "node:url";

const __dirname = dirname(fileURLToPath(import.meta.url));
const SPEC_URL = process.env.JORTT_OPENAPI_URL || "https://api.jortt.nl/swagger_doc";
const target = join(__dirname, "..", "src", "openapi.json");

async function main() {
  process.stderr.write(`Fetching Jortt OpenAPI spec from ${SPEC_URL} ...\n`);
  const res = await fetch(SPEC_URL, { headers: { Accept: "application/json" } });
  if (!res.ok) {
    throw new Error(`HTTP ${res.status} ${res.statusText}`);
  }
  const spec = await res.json();
  if (!spec.paths || typeof spec.paths !== "object") {
    throw new Error("Downloaded file does not look like an OpenAPI spec (no paths).");
  }
  await mkdir(dirname(target), { recursive: true });
  await writeFile(target, JSON.stringify(spec));
  const count = Object.keys(spec.paths).length;
  process.stderr.write(`Wrote ${target} (${count} paths).\n`);
}

main().catch((err) => {
  process.stderr.write(`Failed to fetch spec: ${err.message}\n`);
  process.exit(1);
});