import type { LoadHook, ResolveHook } from "node:module";
import { register } from "node:module";

/**
 * Custom loader for mock files (only in `test` mode)
 * @type {LoadHook}
 */
export const load: LoadHook = (url, context, nextLoad) => {
  if (url.startsWith("mock:")) {
    return {
      format: "module",
      source: "export default {};",
      shortCircuit: true,
    };
  }
  return nextLoad(url, context);
};

/**
 * Custom resolver for mock files (only in `test` mode)
 * @type {ResolveHook}
 */
export const resolve: ResolveHook = (specifier, context, nextResolve) => {

  // CSS mocking
  if ([ ".pcss", ".css" ].some(((ext) => specifier.endsWith(ext)))) {
    return {
      url: `mock:${specifier}`,
      shortCircuit: true,
    };
  }

  return nextResolve(specifier, context);
};

if (process.env.NODE_ENV === "test") {
  register("./testLoader.ts", import.meta.url);
}