import { readdir } from "node:fs/promises";
import path from "node:path";
import { pathToFileURL } from "node:url";
import { createSelfTestContext, type SelfTestCase, type SelfTestResult } from "./harness.js";

const root = path.resolve(import.meta.dirname, "../..");
const casesDir = path.join(root, "src/selftest/cases");
const context = await createSelfTestContext(root);

try {
  const caseFiles = (await readdir(casesDir))
    .filter((file) => file.endsWith(".ts") && !file.endsWith(".d.ts"))
    .sort();
  const results: SelfTestResult[] = [];

  for (const file of caseFiles) {
    const moduleUrl = pathToFileURL(path.join(casesDir, file)).href;
    const imported = await import(moduleUrl) as { default?: SelfTestCase; selfTest?: SelfTestCase };
    const selfTest = imported.default ?? imported.selfTest;
    if (typeof selfTest !== "function") throw new Error(`self-test case ${file} must export default or selfTest function`);
    const result = await selfTest(context);
    results.push({ name: result.name ?? file.replace(/\.ts$/u, ""), tests: result.tests ?? [] });
  }

  console.log(JSON.stringify({ ok: true, cases: results, tests: results.flatMap((result) => result.tests) }));
} finally {
  await context.cleanup();
}