// Wails API 适配层
//
// 前端业务代码只用 window.eh.*，这里把它接到 Wails 的 Go bindings 上。
// 这样以后即便换框架，也只要改这一个文件。

const go = () => window.go && window.go.main && window.go.main.App;

function requireGo() {
  const g = go();
  if (!g) throw new Error('Wails 后端未就绪');
  return g;
}

window.eh = {
  // ---- 设置 ----
  getSettings: async () => requireGo().GetSettings(),
  setSettings: async (patch) => requireGo().SetSettings(patch),
  previewDir: async (tpl) => requireGo().PreviewDir(tpl),
  placeholders: async () => requireGo().Placeholders(),

  // ---- 任务 ----
  listTasks: async () => requireGo().ListTasks(),
  addTasks: async (text) => requireGo().AddTasks(text),
  removeTask: async (t) => requireGo().RemoveTask(t.gid, t.token || ''),
  clearFinished: async () => requireGo().ClearFinished(),
  countDone: async () => requireGo().CountDone(),
  clearAll: async (onlySelected) => requireGo().ClearAll(!!onlySelected),
  requeueFailed: async () => requireGo().RequeueFailed(),
  selectAll: async (gids) => requireGo().SelectAll(gids),

  // ---- 引擎 ----
  status: async () => requireGo().Status(),
  start: async (payload) => {
    const gids = (payload && payload.onlyGids) || [];
    return requireGo().Start(gids);
  },
  stop: async () => requireGo().Stop(),

  // ---- 系统 ----
  pickDir: async () => requireGo().PickDir(),
  exportFailed: async (gid) => {
    const path = await requireGo().ExportFailed(gid);
    return path ? { ok: true, filePath: path } : { ok: false };
  },
  openPath: async (p) => requireGo().OpenPath(p),
  showItem: async (p) => requireGo().ShowItem(p),

  // ---- 事件 ----
  onTaskUpdate: (cb) => window.runtime.EventsOn('task:update', cb),
  onLog: (cb) => window.runtime.EventsOn('log', cb),
  onDone: (cb) => window.runtime.EventsOn('engine:done', cb),
};