#!/usr/bin/env node
/**
 * Migriert content/<locale>/img/*.json5 von altem Schema (title, file.url, …) auf neues Schema (description, src).
 * - src = file.url (pflicht im neuen Schema; fehlt file.url → Warnung, src = "")
 * - description = description || title || ""
 * - _slug bleibt
 */

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

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const CONTENT_ROOT = path.join(__dirname, "..", "content");

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

function* findImgDirs() {
  const locales = fs.readdirSync(CONTENT_ROOT, { withFileTypes: true });
  for (const loc of locales) {
    if (!loc.isDirectory()) continue;
    const imgDir = path.join(CONTENT_ROOT, loc.name, "img");
    if (fs.existsSync(imgDir)) yield imgDir;
  }
}

let total = 0;
let updated = 0;
let skipped = 0;
let noUrl = 0;

for (const imgDir of findImgDirs()) {
  const files = fs.readdirSync(imgDir).filter((f) => f.endsWith(".json5"));
  for (const file of files) {
    total++;
    const filePath = path.join(imgDir, file);
    const raw = fs.readFileSync(filePath, "utf8");
    const data = parseJson5(raw);
    if (!data) {
      console.warn("Skip (parse error):", filePath);
      skipped++;
      continue;
    }
    const url = data.file?.url;
    if (url == null || url === "") {
      console.warn("Keine file.url:", filePath);
      noUrl++;
    }
    const description = data.description != null && data.description !== ""
      ? data.description
      : (data.title != null ? String(data.title) : "");
    const out = {
      _slug: data._slug ?? file.replace(/\.json5$/, ""),
      ...(description !== "" && { description }),
      src: url ?? "",
    };
    fs.writeFileSync(filePath, JSON.stringify(out, null, 2) + "\n", "utf8");
    updated++;
  }
}

console.log("Img-Migration:", updated, "von", total, "Dateien aktualisiert.");
if (skipped) console.log("Übersprungen (Parse-Fehler):", skipped);
if (noUrl) console.log("Ohne file.url (src leer):", noUrl);