#!/usr/bin/env node
/**
 * Quick check: are dist files present and fresh?
 * Exits 0 if ok, 1 if missing or stale.
 *
 * Staleness: any source file newer than the oldest dist file.
 */

import { statSync, existsSync, readdirSync } from "node:fs";
import { resolve, dirname } from "node:path";
import { fileURLToPath } from "node:url";

const __dirname = dirname(fileURLToPath(import.meta.url));
const root = resolve(__dirname, "..");
const distDir = resolve(root, "app/public/assets/dist");

const distFiles = readdirSync(distDir).filter(
  (f) => f.endsWith(".min.css") || f.endsWith(".min.js")
);

if (distFiles.length === 0) {
  console.error("❌ No dist files found. Run: just build");
  process.exit(1);
}

// Check each dist file exists
for (const f of distFiles) {
  if (!existsSync(resolve(distDir, f))) {
    console.error(`❌ Missing: dist/${f}. Run: just build`);
    process.exit(1);
  }
}

// Check staleness: any source newer than the oldest dist?
function walkDir(dir, ext) {
  const files = [];
  const entries = readdirSync(dir, { withFileTypes: true });
  for (const e of entries) {
    const full = resolve(dir, e.name);
    if (e.isDirectory() && e.name !== "components") {
      files.push(...walkDir(full, ext));
    } else if (e.isFile() && full.endsWith(ext)) {
      files.push(full);
    }
  }
  return files;
}

const cssSrcFiles = walkDir(
  resolve(root, "app/public/assets/css"),
  ".css"
).filter((f) => !f.includes("filepond") && !f.includes("modern-normalize"));

const jsSrcFiles = walkDir(
  resolve(root, "app/public/assets/js/app"),
  ".js"
);

const srcFiles = [...cssSrcFiles, ...jsSrcFiles];

const oldestDist = Math.min(
  ...distFiles.map((f) => statSync(resolve(distDir, f)).mtimeMs)
);

let stale = false;
for (const f of srcFiles) {
  try {
    if (statSync(f).mtimeMs > oldestDist) {
      console.error(`❌ Stale dist (source newer than output): ${f}`);
      stale = true;
    }
  } catch {
    // file may not exist (e.g. entry files), skip
  }
}

if (stale) {
  console.error("❌ Run: just build");
  process.exit(1);
}

console.log("✅ Build output is up to date");