#!/usr/bin/env node
import fs from "node:fs/promises";
import path from "node:path";

const DIST = path.join(process.cwd(), "dist");

function stripNonDomRegions(html) {
  // Évite les faux positifs (JS/CSS/COMMENTS/TEMPLATE)
  return html
    .replace(/<!--[\s\S]*?-->/g, "") // ✅ NEW: commentaires HTML
    .replace(/<script\b[^>]*>[\s\S]*?<\/script>/gi, "")
    .replace(/<style\b[^>]*>[\s\S]*?<\/style>/gi, "")
    .replace(/<template\b[^>]*>[\s\S]*?<\/template>/gi, ""); // ✅ NEW: templates
}

function extractRealIds(html) {
  const cleaned = stripNonDomRegions(html);

  // - exige un ESPACE avant id => match " id=" mais PAS "data-id="
  // - cherche dans les tags seulement
  const re = /<[^>]*\sid\s*=\s*(["'])(.*?)\1/gi;

  const ids = [];
  let m;
  while ((m = re.exec(cleaned))) {
    const id = (m[2] || "").trim();
    if (id) ids.push(id);
  }
  return ids;
}

async function listHtmlFiles(dir) {
  const out = [];
  async function walk(d) {
    const entries = await fs.readdir(d, { withFileTypes: true });
    for (const e of entries) {
      const p = path.join(d, e.name);
      if (e.isDirectory()) await walk(p);
      else if (e.isFile() && p.endsWith(".html")) out.push(p);
    }
  }
  await walk(dir);
  return out;
}

function countDuplicates(ids) {
  const map = new Map();
  for (const id of ids) map.set(id, (map.get(id) || 0) + 1);
  const dups = [...map.entries()].filter(([, c]) => c > 1);
  dups.sort((a, b) => b[1] - a[1] || a[0].localeCompare(b[0]));
  return dups;
}

let failures = 0;
let files = 0;

let htmlFiles = [];
try {
  htmlFiles = await listHtmlFiles(DIST);
} catch {
  console.error(`❌ dist introuvable: ${DIST} (as-tu fait 'npm run build' ?)`);
  process.exit(1);
}

for (const file of htmlFiles) {
  files++;
  const html = await fs.readFile(file, "utf8");
  const ids = extractRealIds(html);
  const dups = countDuplicates(ids);

  if (dups.length) {
    failures++;
    console.error(`❌ DUP IDS: ${file}`);
    for (const [id, c] of dups) {
      console.error(`   - ${id} x${c}`);
    }
  }
}

if (failures) {
  console.error(`\n❌ audit-dist FAILED: files=${files} failures=${failures}`);
  process.exit(1);
}

console.log(`✅ audit-dist OK: files=${files}`);