// /pages/api/cpl/getDigitalOutputsJsonHandler.ts

import { NextApiRequest, NextApiResponse } from "next";
import path from "path";
import fs from "fs/promises";

export default async function handler(
  req: NextApiRequest,
  res: NextApiResponse
) {
  const mode = process.env.NEXT_PUBLIC_CPL_MODE ?? "json";

  if (mode === "json") {
    // Lese JSON-Datei z. B. digitalOutputsMockData.json
    const filePath = path.join(
      process.cwd(),
      "mocks/api/SERVICE/digitalOutputsMockData.json"
    );
    const content = await fs.readFile(filePath, "utf-8");
    const data = JSON.parse(content);
    return res.status(200).json(data);
  }

  if (mode === "jsmock") {
    // Lese Datei und extrahiere window-Variablen aus .js-Datei
    const filePath = path.join(
      process.cwd(),
      "mocks/device-cgi-simulator/SERVICE/digitalOutputsMockData.js"
    );
    const fileContent = await fs.readFile(filePath, "utf-8");

    const stateMatch = fileContent.match(/win_da_state\s*=\s*\[([^\]]*)\]/);
    const labelMatch = fileContent.match(
      /win_da_bezeichnung\s*=\s*\[([^\]]*)\]/
    );

    const win_da_state =
      stateMatch?.[1]?.split(",").map((x) => parseInt(x.trim())) || [];
    const win_da_bezeichnung =
      labelMatch?.[1]?.split(",").map((x) => x.trim().replace(/["']/g, "")) ||
      [];

    return res.status(200).json({ win_da_state, win_da_bezeichnung });
  }

  return res.status(400).json({ error: "Unsupported mode" });
}