// Clawmates Live — client adapter
// --------------------------------
// Drop-in: include this in any visualization page. It connects to the live bridge and
// dispatches typed events. If no live URL is provided, it does NOTHING and the page keeps
// its built-in synthetic animation (safe fallback).
//
//   <script src="clawmates-live.js"></script>
//
// Live URL resolution order:
//   1. window.CLAWMATES_LIVE_URL
//   2. ?live=<url> query param
//   3. (none) → inert
//
// Usage from a visualization's logic:
//   ClawmatesLive.on('world.touch', e => worldEngine.touch(e.agentId, e.nodeId));
//   ClawmatesLive.on('telemetry',   e => setTopbar(e));
// Handlers registered AFTER events have arrived still receive the last replayed value
// for stateful event types (status/task/telemetry/topology/routine/node).

(function () {
  const TYPES = [
    'agent.status', 'agent.task.update', 'agent.reasoning.delta', 'agent.computer.frame',
    'agent.tool.call', 'door.request', 'door.resolve', 'agent.message',
    'world.touch', 'node.activity', 'topology.update', 'telemetry', 'routine.update',
  ];
  const STATEFUL = new Set(['agent.status', 'agent.task.update', 'node.activity', 'telemetry', 'topology.update', 'routine.update']);

  const handlers = {};                 // type → Set<fn>
  const last = {};                     // stateKey → payload (replay buffer)
  TYPES.forEach(t => (handlers[t] = new Set()));

  function stateKey(type, d) {
    if (type === 'agent.status' || type === 'agent.task.update') return type + ':' + d.agentId;
    if (type === 'node.activity') return type + ':' + d.nodeId;
    if (type === 'routine.update') return type + ':' + d.routineId;
    return type; // telemetry, topology.update
  }

  function dispatch(type, data) {
    if (STATEFUL.has(type)) last[stateKey(type, data)] = data;
    (handlers[type] || []).forEach(fn => { try { fn(data); } catch (e) { console.warn('[ClawmatesLive]', type, e); } });
    try { window.dispatchEvent(new CustomEvent('clawmates:' + type, { detail: data })); } catch {}
  }

  function resolveUrl() {
    if (window.CLAWMATES_LIVE_URL) return window.CLAWMATES_LIVE_URL;
    try { return new URLSearchParams(location.search).get('live') || null; } catch { return null; }
  }

  const API = {
    connected: false,
    url: null,
    on(type, fn) {
      if (!handlers[type]) handlers[type] = new Set();
      handlers[type].add(fn);
      // replay last-known stateful value so late subscribers paint immediately
      for (const k in last) if (k === type || k.startsWith(type + ':')) { try { fn(last[k]); } catch {} }
      return () => handlers[type].delete(fn);
    },
    off(type, fn) { handlers[type] && handlers[type].delete(fn); },
    connect(url) {
      url = url || resolveUrl();
      if (!url) { console.info('[ClawmatesLive] no live URL — running in synthetic/offline mode'); return; }
      this.url = url;
      const es = new EventSource(url);
      es.onopen = () => { this.connected = true; window.dispatchEvent(new CustomEvent('clawmates:open')); };
      es.onerror = () => { this.connected = false; window.dispatchEvent(new CustomEvent('clawmates:reconnecting')); };
      TYPES.forEach(type => es.addEventListener(type, ev => {
        let data; try { data = JSON.parse(ev.data); } catch { return; }
        dispatch(type, data);
      }));
      this._es = es;
    },
    disconnect() { if (this._es) { this._es.close(); this._es = null; this.connected = false; } },
  };

  window.ClawmatesLive = API;
  // auto-connect on load if a URL is resolvable
  if (document.readyState !== 'loading') API.connect();
  else window.addEventListener('DOMContentLoaded', () => API.connect());
})();