const fs = require("fs");
const path = require("path");

function saveJsonIfChanged(newJson, lastStatisRef) {
  const newStatis = newJson?.Statis || [];

  const hasChanged =
    newStatis.length !== lastStatisRef.length ||
    newStatis.some((entry, index) => {
      const prev = lastStatisRef[index];
      return (
        !prev ||
        entry.Modul !== prev.Modul ||
        entry.ModulName !== prev.ModulName ||
        entry.Value !== prev.Value ||
        entry.Level !== prev.Level
      );
    });

  if (hasChanged) {
    lastStatisRef.splice(0, lastStatisRef.length, ...newStatis);

    const outputPath = path.join(process.cwd(), "debug", `webserviceDump-${Date.now()}.json`);
    fs.mkdirSync(path.dirname(outputPath), { recursive: true });
    fs.writeFileSync(outputPath, JSON.stringify(newJson, null, 2), "utf-8");
    console.log("📝 Webservice-Daten wurden gespeichert:", outputPath);
  }

  return hasChanged;
}

module.exports = { saveJsonIfChanged };