#!/usr/bin/env node
/**
 * Optional: full graphql-ws handshake — connection_init → connection_ack over wss://
 * Server must expose a single clean upgrade path (standalone `ws` + graphql-ws; remove unused
 * `@fastify/websocket` on CT 7800 if clients see RSV1 — see ensure-sankofa-phoenix-graphql-ws-remove-fastify-websocket-7800.sh).
 *
 * Usage:
 *   node scripts/verify/smoke-phoenix-graphql-ws-subscription.mjs
 *   PHOENIX_GRAPHQL_WSS_URL=wss://host/graphql-ws node scripts/verify/smoke-phoenix-graphql-ws-subscription.mjs
 */
import { createRequire } from 'node:module';
import { fileURLToPath } from 'node:url';
import path from 'node:path';

const require = createRequire(import.meta.url);
const repoRoot = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '..', '..');
const WebSocket = require(path.join(repoRoot, 'node_modules', 'ws'));

const url = process.env.PHOENIX_GRAPHQL_WSS_URL || 'wss://phoenix.sankofa.nexus/graphql-ws';
const timeoutMs = Number(process.env.PHOENIX_WS_SUB_TIMEOUT_MS || 15000);

const ws = new WebSocket(url, ['graphql-transport-ws'], { perMessageDeflate: false });

const timer = setTimeout(() => {
  console.error('TIMEOUT waiting for connection_ack');
  ws.terminate();
  process.exit(1);
}, timeoutMs);

ws.on('open', () => {
  ws.send(JSON.stringify({ type: 'connection_init' }));
});

ws.on('message', (data) => {
  const text = String(data);
  let msg;
  try {
    msg = JSON.parse(text);
  } catch {
    console.error('Non-JSON message:', text.slice(0, 200));
    return;
  }
  if (msg.type === 'connection_ack') {
    clearTimeout(timer);
    console.log('OK: graphql-ws connection_ack');
    ws.close(1000, 'smoke-ok');
    process.exit(0);
  }
  if (msg.type === 'ping') {
    ws.send(JSON.stringify({ type: 'pong' }));
    return;
  }
  console.log('msg:', msg.type, JSON.stringify(msg).slice(0, 200));
});

ws.on('error', (err) => {
  clearTimeout(timer);
  console.error('WebSocket error:', err.message);
  process.exit(2);
});

ws.on('close', (code, reason) => {
  clearTimeout(timer);
  if (code !== 1000) {
    console.error('Closed:', code, String(reason));
    process.exit(3);
  }
});