/**
 * Child-process entry point for loading a TS/JS template module.
 *
 * Usage (via tsx): `tsx template-module-loader.js <absolute-template-path>`
 *
 * Writes serialized Extended JSON to stdout. Errors go to stderr with exit code 1.
 * Running in a subprocess isolates module evaluation from the wallet process.
 */

import { pathToFileURL } from "node:url";

import { serializeTemplate } from "@xo-cash/utils";
import type { XOTemplate } from "@xo-cash/types";

import { pickTemplateExport } from "./pick-template-export.js";

const templateFilePath = process.argv[2];

if (templateFilePath === undefined || templateFilePath.length === 0) {
  console.error("Usage: template-module-loader <absolute-template-path>");
  process.exit(1);
}

try {
  const moduleUrl = pathToFileURL(templateFilePath).href;
  const loadedModule = (await import(moduleUrl)) as Record<string, unknown>;
  const template = pickTemplateExport(loadedModule);
  process.stdout.write(serializeTemplate(template as XOTemplate));
} catch (error) {
  const message = error instanceof Error ? error.message : String(error);
  console.error(`Failed to load template module: ${message}`);
  process.exit(1);
}