import fs from "node:fs/promises";
import path from "node:path";

const outDir = "/site";
const indexPath = "www.mewedding.vn/index.html";
const sourceDir = "www.mewedding.vn/source";

function decodeLocalAsset(rawUrl) {
  let url = rawUrl.split("?")[0];
  url = url.replaceAll("\\ ", " ");
  url = url.replace(/^\.\.\//, "");
  url = url.replace(/^\/+/, "");
  try {
    return decodeURIComponent(url);
  } catch {
    return url;
  }
}

async function copyFilePreservingPath(relativePath) {
  const source = path.resolve(relativePath);
  const target = path.join(outDir, relativePath);
  await fs.mkdir(path.dirname(target), { recursive: true });
  await fs.copyFile(source, target);
}

const html = await fs.readFile(indexPath, "utf8");
await fs.rm(outDir, { recursive: true, force: true });
await copyFilePreservingPath(indexPath);
await fs.cp(sourceDir, path.join(outDir, sourceDir), { recursive: true });

const assetPattern =
  /(?:url\(["']?|src=["']|href=["']|"(?:dC|dw)"\s*:\s*")((?:\.\.\/|\/)w\.ladicdn\.com\/[^"')]+)/g;
const assets = new Set();

for (const match of html.matchAll(assetPattern)) {
  assets.add(decodeLocalAsset(match[1]));
}

const missing = [];
for (const asset of assets) {
  try {
    await fs.access(asset);
    await copyFilePreservingPath(asset);
  } catch {
    missing.push(asset);
  }
}

if (missing.length > 0) {
  console.error("Missing local assets:");
  for (const asset of missing) console.error(`- ${asset}`);
  process.exit(1);
}

console.log(`Prepared static site with ${assets.size} local assets.`);