async function createPlugin(ctx) {
  let currentRoute = String(ctx.getSetting("defaultRoute", ctx.env.RFROUTE_DEFAULT || "rx"));
  const allowed = new Set(["tx", "rx", "on", "off", "draht", "beam", "wrtc"]);

  return {
    async execute(action, input) {
      if (action !== "setRoute") {
        throw new Error(`Unknown action: ${action}`);
      }
      const route = String(input && input.route || "").toLowerCase();
      if (!allowed.has(route)) {
        throw new Error("ungueltige Route");
      }
      const map = {
        tx: ctx.env.RFROUTE_CMD_TX,
        rx: ctx.env.RFROUTE_CMD_RX,
        on: ctx.env.RFROUTE_CMD_ON,
        off: ctx.env.RFROUTE_CMD_OFF,
        draht: ctx.env.RFROUTE_CMD_DRAHT,
        beam: ctx.env.RFROUTE_CMD_BEAM,
        wrtc: ctx.env.RFROUTE_CMD_WRTC
      };
      const command = String(map[route] || "").trim();
      const simulate = typeof ctx.simulateHardware === "boolean"
        ? ctx.simulateHardware
        : (process.platform !== "linux" && String(ctx.env.ALLOW_NON_LINUX_CMDS || "false") !== "true");
      if (!command && !simulate) {
        throw new Error(`RFROUTE_CMD_${route.toUpperCase()} fehlt`);
      }
      if (command) {
        if (simulate) {
          currentRoute = route;
          return {
            ok: true,
            skipped: true,
            message: `RF Route ${route} simuliert (${ctx.execMode || "dev"})`
          };
        }
        const result = await ctx.commandRunner(command, {
          timeoutMs: Number(ctx.getSetting("timeoutMs", ctx.env.RFROUTE_TIMEOUT_MS || 15000))
        });
        if (!result.ok) {
          throw new Error(result.stderr || result.error || "rfroute command failed");
        }
      }
      currentRoute = route;
      return {
        ok: true,
        message: `Route auf ${route} gesetzt`
      };
    },
    async getStatus() {
      return {
        current: currentRoute,
        options: ["tx", "rx", "on", "off", "draht", "beam", "wrtc"]
      };
    },
    async health() {
      return { ok: true };
    }
  };
}

module.exports = {
  createPlugin
};