#!/usr/bin/env node
/**
 * Fügt allen Posts das Präfix "post-" hinzu: Dateiname und _slug werden zu "post-" + bisheriger Slug.
 * Aktualisiert alle Referenzen in content/de.
 */

import fs from "fs";
import path from "path";
import { fileURLToPath } from "url";

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const CONTENT_DE = path.join(__dirname, "..", "content", "de");
const POST_DIR = path.join(CONTENT_DE, "post");

function parseJson5(str) {
  try {
    return JSON.parse(str);
  } catch {
    return null;
  }
}

const files = fs.readdirSync(POST_DIR).filter((f) => f.endsWith(".json5"));
const oldToNew = new Map();

for (const file of files) {
  const oldSlug = file.replace(/\.json5$/, "");
  if (oldSlug.startsWith("post-")) continue;
  oldToNew.set(oldSlug, "post-" + oldSlug);
}

console.log("Präfix post- für", oldToNew.size, "Posts");

for (const [oldSlug, newSlug] of oldToNew) {
  const filePath = path.join(POST_DIR, oldSlug + ".json5");
  const data = parseJson5(fs.readFileSync(filePath, "utf8"));
  data._slug = newSlug;
  const newPath = path.join(POST_DIR, newSlug + ".json5");
  fs.writeFileSync(newPath, JSON.stringify(data, null, 2) + "\n", "utf8");
  fs.unlinkSync(filePath);
}

function walkDir(dir, fn) {
  const entries = fs.readdirSync(dir, { withFileTypes: true });
  for (const e of entries) {
    const full = path.join(dir, e.name);
    if (e.isDirectory()) walkDir(full, fn);
    else if (e.name.endsWith(".json5")) fn(full);
  }
}

walkDir(CONTENT_DE, (filePath) => {
  let content = fs.readFileSync(filePath, "utf8");
  let changed = false;
  for (const [oldSlug, newSlug] of oldToNew) {
    const escaped = oldSlug.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
    const newContent = content.replace(new RegExp('"' + escaped + '"', "g"), '"' + newSlug + '"');
    if (newContent !== content) {
      content = newContent;
      changed = true;
    }
  }
  if (changed) fs.writeFileSync(filePath, content, "utf8");
});

console.log("Fertig. Post-Präfix gesetzt und Referenzen aktualisiert.");