// Tiny browser-local (localStorage) preference helper, in `@hive/shared`
// so a future second consumer (e.g. swarm-ui's own terminal) gets the
// exact same key name for free via the browser's shared per-origin
// storage, rather than an independent copy that could drift.
// `ExpandDetailsSetting` / `HideDebugSetting` (the settings popover rows
// of the per-agent page and of the swarm UI) are the only writers today;
// `Row.tsx` is the only reader of either.

const EXPAND_DETAILS_KEY = "hive-agent-expand-details";

// Whether a per-agent terminal's otherwise-collapsed `<details>` panels
// (long tool-results, Write/Edit diffs, …) should default open. Pure
// client-side — no backend field, nothing round-trips through
// `/api/*`. Read live (not cached) by the shared terminal factory's
// `expandDetails` option — see docs/web-ui/shape.md::Shared terminal
// pane — so a preference change applies to the next rendered row in
// any already-open agent tab without a reload.
export function getExpandDetailsPref(): boolean {
  try {
    return localStorage.getItem(EXPAND_DETAILS_KEY) === "1";
  } catch {
    return false;
  }
}
export function setExpandDetailsPref(v: boolean): void {
  try {
    if (v) localStorage.setItem(EXPAND_DETAILS_KEY, "1");
    else localStorage.removeItem(EXPAND_DETAILS_KEY);
  } catch {
    /* localStorage unavailable — preference is session-only */
  }
}

const HIDE_DEBUG_KEY = "hive-agent-hide-debug";

// Whether a per-agent terminal's `debug`-level rows (thinking, coalesced
// ticks, ambient harness chatter — see docs/web-ui/terminal-rendering.md's
// Levels table) should be skipped entirely rather than rendered muted.
// Same shape as `getExpandDetailsPref` above: pure client-side, no
// backend field, read live (not cached) so a change applies to the next
// rendered row without a reload.
export function getHideDebugPref(): boolean {
  try {
    return localStorage.getItem(HIDE_DEBUG_KEY) === "1";
  } catch {
    return false;
  }
}
export function setHideDebugPref(v: boolean): void {
  try {
    if (v) localStorage.setItem(HIDE_DEBUG_KEY, "1");
    else localStorage.removeItem(HIDE_DEBUG_KEY);
  } catch {
    /* localStorage unavailable — preference is session-only */
  }
  for (const listener of hideDebugListeners) listener();
}

const hideDebugListeners = new Set<() => void>();

// Calls `listener` whenever the preference changes: in this tab through
// `setHideDebugPref`, in another tab of the same origin through the
// browser's `storage` event. Returns the unsubscribe. This is what lets a
// terminal that is already showing rows follow the toggle, instead of only
// the rows that arrive after it.
export function subscribeHideDebugPref(listener: () => void): () => void {
  hideDebugListeners.add(listener);
  const onStorage = (e: StorageEvent) => {
    if (e.key === HIDE_DEBUG_KEY || e.key === null) listener();
  };
  window.addEventListener("storage", onStorage);
  return () => {
    hideDebugListeners.delete(listener);
    window.removeEventListener("storage", onStorage);
  };
}