// /pages/api/cpl/getAnalogInputsHandler.ts

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

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

  if (mode === "json") {
    const filePath = path.join(
      process.cwd(),
      "mocks/api/SERVICE/analogInputsMockData.json"
    );
    const content = fs.readFileSync(filePath, "utf-8");
    const data = JSON.parse(content);
    return res.status(200).json(data);
  }

  if (mode === "jsmock") {
    const filePath = path.join(
      process.cwd(),
      "mocks/device-cgi-simulator/SERVICE/analogInputsMockData.js"
    );
    const fileContent = fs.readFileSync(filePath, "utf-8");

    function extractArray(name) {
      const match = fileContent.match(
        new RegExp(`var\\s+${name}\\s*=\\s*\\[([\\s\\S]*?)\\];`)
      );
      return match
        ? match[1].split(",").map((s) => s.trim().replace(/^["']|["']$/g, ""))
        : [];
    }

    const result = {
      win_analogInputsValues: extractArray("win_analogInputsValues").map(
        Number
      ),
      win_analogInputsNames: extractArray("win_analogInputsNames"),
      win_analogInputsOffset: extractArray("win_analogInputsOffset").map(
        Number
      ),
      win_analogInputsFactor: extractArray("win_analogInputsFactor").map(
        Number
      ),
      win_analogInputsloggerIntervall: extractArray(
        "win_analogInputsloggerIntervall"
      ).map(Number),
      win_analogInputsUnits: extractArray("win_analogInputsUnits"),
      win_analogInputsWeighting: extractArray("win_analogInputsWeighting").map(
        Number
      ),
    };

    // Begrenzung auf maximal 8 Elemente je Array
    Object.keys(result).forEach((key) => {
      if (Array.isArray(result[key])) {
        result[key] = result[key].slice(0, 8);
      }
    });

    return res.status(200).json(result);
  }

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