// Workspace display preferences (SidebarPrefs pattern: eager
// ValueNotifier + SharedPreferences persistence, loaded once at
// startup).

import 'package:flutter/foundation.dart';
import 'package:shared_preferences/shared_preferences.dart';

class WorkspacePrefs {
  WorkspacePrefs._();

  static const _kSealedNamesKey = 'workspace.sealed_names_visible';

  /// Whether the workspace switcher lists sealed areas with their
  /// names right away. Default FALSE: area names often carry
  /// client/mandate identity, so the switcher shows an aggregated
  /// row ("2 sealed areas") until the operator deliberately
  /// expands it (usertest security finding). The Settings toggle
  /// restores the direct listing for single-operator machines.
  static final ValueNotifier<bool> sealedNamesVisible =
      ValueNotifier(false);

  static Future<void> load() async {
    final prefs = await SharedPreferences.getInstance();
    sealedNamesVisible.value = prefs.getBool(_kSealedNamesKey) ?? false;
    recentContexts.value =
        prefs.getStringList(_kRecentContextsKey) ?? const [];
  }

  static Future<void> setSealedNamesVisible(bool value) async {
    sealedNamesVisible.value = value;
    final prefs = await SharedPreferences.getInstance();
    await prefs.setBool(_kSealedNamesKey, value);
  }

  static const _kRecentContextsKey = 'workspace.recent_contexts';
  static const _kRecentContextsMax = 5;

  /// Recently chosen switcher values (menu-value scheme: '' /
  /// `p:<slug>` / `s:<slug>`), most recent first. The command
  /// palette ranks matching contexts by this list so a poweruser's
  /// frequent areas surface before the alphabet.
  static final ValueNotifier<List<String>> recentContexts =
      ValueNotifier(const []);

  /// Record a switcher selection (deduped, capped, persisted).
  static Future<void> recordRecentContext(String value) async {
    final next = [
      value,
      ...recentContexts.value.where((v) => v != value),
    ].take(_kRecentContextsMax).toList();
    recentContexts.value = next;
    final prefs = await SharedPreferences.getInstance();
    await prefs.setStringList(_kRecentContextsKey, next);
  }
}