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

const CWD = process.cwd();
const ALIASES_PATH = path.join(CWD, "src", "anchors", "anchor-aliases.json");
const DIST_DIR = path.join(CWD, "dist");

if (!fs.existsSync(ALIASES_PATH)) {
  console.log("ℹ️  Pas d'aliases => skip verify.");
  process.exit(0);
}
if (!fs.existsSync(DIST_DIR)) {
  console.error("❌ dist/ introuvable. Lance d'abord le build.");
  process.exit(1);
}

const aliases = JSON.parse(fs.readFileSync(ALIASES_PATH, "utf8"));

let checked = 0;
let failed = 0;

for (const [route, mapping] of Object.entries(aliases)) {
  const htmlPath = path.join(DIST_DIR, route.replace(/^\//, ""), "index.html");
  if (!fs.existsSync(htmlPath)) {
    console.error(`❌ HTML introuvable pour route=${route} => ${htmlPath}`);
    failed++;
    continue;
  }
  const html = fs.readFileSync(htmlPath, "utf8");

  for (const [oldId, newId] of Object.entries(mapping)) {
    checked++;

    const oldNeedle = `id="${oldId}"`;
    const newNeedle = `id="${newId}"`;

    const oldPos = html.indexOf(oldNeedle);
    const newPos = html.indexOf(newNeedle);

    if (newPos === -1) {
      console.error(`❌ newId absent: route=${route} newId=${newId}`);
      failed++;
      continue;
    }
    if (oldPos === -1) {
      console.error(`❌ alias oldId non injecté: route=${route} oldId=${oldId} (newId=${newId})`);
      failed++;
      continue;
    }
    if (oldPos > newPos) {
      console.error(`❌ alias placé APRÈS newId: route=${route} oldId=${oldId} newId=${newId}`);
      failed++;
      continue;
    }
  }
}

if (failed) {
  console.error(`❌ verify-anchor-aliases-in-dist: failed=${failed} checked=${checked}`);
  process.exit(1);
}

console.log(`✅ verify-anchor-aliases-in-dist: checked=${checked} (all good)`);