import fs from "fs";
import path from "path";
import yaml from "js-yaml";

const ROOT = "src/content/glossaire";

const files = fs.readdirSync(ROOT).filter(f => f.endsWith(".md"));

const slugs = new Set(files.map(f => f.replace(".md", "")));

let missingNavigation = [];
let edges = {};
let incoming = {};

for (const file of files) {
  const full = path.join(ROOT, file);
  const raw = fs.readFileSync(full, "utf-8");

  if (!raw.startsWith("---")) continue;

  const data = yaml.load(raw.split("---")[1]) || {};
  const slug = file.replace(".md", "");

  if (!data.navigation) {
    missingNavigation.push(slug);
  }

  const next = data?.navigation?.primaryNext;
  if (next) {
    edges[slug] = next;
    incoming[next] = (incoming[next] || 0) + 1;
  }
}

// 🔍 1. Fiches sans navigation
if (missingNavigation.length > 0) {
  console.log("\n❌ Missing navigation:");
  missingNavigation.forEach(s => console.log(" -", s));
}

// 🔍 2. Cycles directs
console.log("\n🔍 Direct cycles:");
for (const [a, b] of Object.entries(edges)) {
  if (edges[b] === a) {
    console.log(` - ${a} <-> ${b}`);
  }
}

// 🔍 3. Hubs
console.log("\n📊 Top hubs:");
Object.entries(incoming)
  .sort((a,b) => b[1]-a[1])
  .slice(0,10)
  .forEach(([slug, n]) => {
    if (n > 5) console.log(`⚠️ ${slug}: ${n}`);
    else console.log(`  ${slug}: ${n}`);
  });

// 🔍 4. Slugs morts
console.log("\n🔗 Checking dead primaryNext:");
for (const [a,b] of Object.entries(edges)) {
  if (!slugs.has(b)) {
    console.log(`❌ ${a} → ${b} (missing)`);
  }
}

console.log("\n✅ Audit done");