// /pages/api/fake-cpl/SERVICE/updateDigitalOutputsHandler.ts

import fs from "fs";
import path from "path";

export default function handler(req, res) {
  if (req.method !== "GET") {
    return res.status(405).json({ error: "Nur GET erlaubt" });
  }

  const id = parseInt(req.query.id as string);
  const value = parseInt(req.query.value as string);

  const filePath = path.join(
    process.cwd(),
    "mocks",
    "device-cgi-simulator",
    "SERVICE",
    "digitalOutputsMockData.js"
  );

  try {
    let content = fs.readFileSync(filePath, "utf-8");

    const match = content.match(/win_da_state\s*=\s*\[(.*?)\];/s);
    const currentState = match ? JSON.parse(`[${match[1]}]`) : [];

    if (isNaN(id) || isNaN(value) || id < 1 || id > currentState.length) {
      return res
        .status(400)
        .json({ error: `Ungültige Parameter: id=${id}, value=${value}` });
    }

    // Wert aktualisieren
    currentState[id - 1] = value;

    const updatedContent =
      `win_da_state = [${currentState.join(", ")}];\n` +
      `win_da_bezeichnung = ["A1", "A2", "A3", "A4"]; // fest für Demo`;

    fs.writeFileSync(filePath, updatedContent, "utf-8");

    res.status(200).json({ success: true, win_da_state: currentState });
  } catch (err) {
    console.error("❌ Fehler beim Schreiben der Mock-Datei:", err);
    res.status(500).json({ error: "Fehler beim Schreiben der Mock-Datei" });
  }
}