// adapter.js —— 壳层适配：同一套聊天前端跑在 Electron / Tauri / 浏览器(mock) 三种宿主
// 统一暴露 window.GHB = { send(to, text), on(event, cb) }
// 事件：connected{node_id} / message{from,text,msg_id} / sent{msg_id,to} / receipt{msg_id,verified} / error{message}
(() => {
  const handlers = {};
  const on = (ev, cb) => { (handlers[ev] = handlers[ev] || []).push(cb); };
  const dispatch = (ev, payload) => (handlers[ev] || []).forEach((cb) => cb(payload));

  if (window.ghbElectron) {
    // Electron：preload 已注入 ipc 通道
    window.ghbElectron.onEvent((ev) => dispatch(ev.event === 'message' ? 'message' : ev.event, ev));
    window.GHB = {
      kind: 'electron',
      on,
      send: (to, text) => window.ghbElectron.send(to, text),
    };
  } else if (window.__TAURI__ && window.__TAURI__.event && window.__TAURI__.core) {
    // Tauri v2（withGlobalTauri）：listen('ghb:event') + invoke('bridge_send')
    window.__TAURI__.event.listen('ghb:event', (e) => dispatch(e.payload.event, e.payload));
    window.GHB = {
      kind: 'tauri',
      on,
      send: (to, text) => window.__TAURI__.core.invoke('bridge_send', { to, text }),
    };
  } else {
    // 浏览器直开（无壳）：只提示，不阻塞渲染
    window.GHB = {
      kind: 'mock',
      on,
      send: () => {
        dispatch('error', { message: '未在壳层中运行：请通过 Electron / Tauri 打开' });
      },
    };
    dispatch('error', { message: '桥接未接入（裸浏览器模式）' });
  }
})();