// /pages/api/talas_v5_DB/station/getAllStationsNames.js
import mysql from "mysql2/promise";

// Verbindungspool-Konfiguration
const pool = mysql.createPool({
  host: process.env.DB_HOST,
  user: process.env.DB_USER,
  password: process.env.DB_PASSWORD,
  database: process.env.DB_NAME,
  port: process.env.DB_PORT,
  waitForConnections: true,
  connectionLimit: 10,
  queueLimit: 0,
});

export default async function handler(req, res) {
  if (req.method !== "GET") {
    res.setHeader("Allow", ["GET"]);
    return res.status(405).end(`Method ${req.method} Not Allowed`);
  }

  try {
    // Abrufen aller idLD und ihrer Namen
    const [results] = await pool.query("SELECT idLD, name FROM location_device");

    if (results.length === 0) {
      return res.status(404).json({ error: "No data found" });
    }

    // Struktur der Antwort anpassen
    const namesMap = results.reduce((map, { idLD, name }) => {
      if (!map[idLD]) {
        map[idLD] = name; // Stelle sicher, dass hier keine Duplikate oder Überschreibungen entstehen
      }
      return map;
    }, {});

    res.status(200).json(namesMap);
  } catch (err) {
    console.error("Fehler beim Abrufen der Daten:", err);
    res.status(500).json({ error: "Error retrieving data from the database" });
  }
}