#!/usr/bin/env node

import { createHash } from "node:crypto";
import { readFileSync, writeFileSync } from "node:fs";
import path from "node:path";
import { fileURLToPath } from "node:url";

const assetReferencePattern =
  /(\b(?:src|href)=")(\.\/assets\/[^"?]+\.(?:css|js))(?:\?v=[^"]+)?(")/g;

export function cacheBustZooModelingAppAssets(outputDir) {
  const indexPath = path.join(outputDir, "index.html");
  const source = readFileSync(indexPath, "utf8");
  let versionedAssetCount = 0;

  const versionedSource = source.replace(
    assetReferencePattern,
    (_match, prefix, assetReference, suffix) => {
      const assetPath = path.join(outputDir, assetReference.slice(2));
      const version = createHash("sha256")
        .update(readFileSync(assetPath))
        .digest("hex")
        .slice(0, 12);
      versionedAssetCount += 1;
      return `${prefix}${assetReference}?v=${version}${suffix}`;
    }
  );

  if (versionedAssetCount === 0) {
    throw new Error(`No versioned HiCAD assets found in ${indexPath}`);
  }

  writeFileSync(indexPath, versionedSource);
  return versionedAssetCount;
}

const invokedPath = process.argv[1] ? path.resolve(process.argv[1]) : "";
if (invokedPath === fileURLToPath(import.meta.url)) {
  const outputDir = path.resolve(
    process.argv[2] || "public/vendor/zoo-modeling-app"
  );
  const assetCount = cacheBustZooModelingAppAssets(outputDir);
  console.log(`Versioned ${assetCount} HiCAD entry assets in ${outputDir}`);
}