/**
 * A stand-in gateway for scripts/e2e-alerts.sh: connects to /ws/edge/v1 with
 * an edge JWT, says hello, then reports one printer through a sequence of
 * states, one telemetry frame each, and waits for the backend to take them.
 *
 * Usage: bun scripts/fake-gateway.ts <ws-url> <edge-jwt> <printer-id> STATE[,STATE...]
 * A state is a Bambu gcode_state word (IDLE, RUNNING, PAUSE, FAILED).
 */
const [url, jwt, printerId, states] = process.argv.slice(2);
if (!url || !jwt || !printerId || !states) {
  console.error("usage: fake-gateway.ts <ws-url> <edge-jwt> <printer-id> STATE[,STATE...]");
  process.exit(2);
}

const ws = new WebSocket(url, { headers: { authorization: `Bearer ${jwt}` } } as never);
ws.onerror = () => {
  console.error("socket error");
  process.exit(1);
};
ws.onopen = async () => {
  ws.send(JSON.stringify({ type: "hello", gateway_id: "fake-gw" }));
  for (const state of states.split(",")) {
    ws.send(
      JSON.stringify({
        type: "telemetry",
        printers: [{ printer_id: printerId, name: "Fake", state, percent: 10, print_error: 0 }],
      }),
    );
    // Telemetry is persisted in order per socket; a pause keeps the frames
    // from being coalesced into one observation.
    await Bun.sleep(400);
  }
  await Bun.sleep(500);
  ws.close();
  process.exit(0);
};