import { mkdir, readFile, writeFile } from "node:fs/promises";
import { resolve } from "node:path";
import { CONFORMANCE_RULES } from "../src/conformance/rules.js";

const root = resolve(import.meta.dirname, "..");
const outputDirectory = resolve(root, "website/src/generated");
const outputPath = resolve(outputDirectory, "conformance-rules.ts");

const publicRules = Object.fromEntries(
  Object.values(CONFORMANCE_RULES).map((rule) => [
    rule.id,
    {
      id: rule.id,
      title: rule.title,
      category: rule.category,
      normativeLevel: rule.normativeLevel,
      source: rule.source,
      expected: rule.expected,
      severity: rule.severity,
      repairability: rule.repairability,
      confidence: rule.confidence,
    },
  ]),
);
const header = "// Generated by scripts/generate-conformance-data.ts. Do not edit.\n";
const output = `${header}export const publicConformanceRules = ${JSON.stringify(
  publicRules,
  null,
  2,
)} as const;\n`;

if (process.argv.includes("--check")) {
  let existing: string;
  try {
    existing = await readFile(outputPath, "utf8");
  } catch {
    throw new Error("Generated conformance data is missing; run pnpm generate:conformance-data");
  }
  if (existing !== output) {
    throw new Error("Generated conformance data is stale; run pnpm generate:conformance-data");
  }
} else {
  await mkdir(outputDirectory, { recursive: true });
  await writeFile(outputPath, output, "utf8");
}