/**
 * User actions service - manages pinned, bookmarked, and highlighted events
 * Stores in localStorage for persistence
 */

const STORAGE_KEY_PINNED = 'aitherboard_pinned_events';
const STORAGE_KEY_BOOKMARKED = 'aitherboard_bookmarked_events';
const STORAGE_KEY_HIGHLIGHTED = 'aitherboard_highlighted_events';

/**
 * Get all pinned event IDs
 */
export function getPinnedEvents(): Set<string> {
  if (typeof window === 'undefined') return new Set();
  try {
    const stored = localStorage.getItem(STORAGE_KEY_PINNED);
    if (!stored) return new Set();
    const ids = JSON.parse(stored) as string[];
    return new Set(ids);
  } catch {
    return new Set();
  }
}

/**
 * Get all bookmarked event IDs
 */
export function getBookmarkedEvents(): Set<string> {
  if (typeof window === 'undefined') return new Set();
  try {
    const stored = localStorage.getItem(STORAGE_KEY_BOOKMARKED);
    if (!stored) return new Set();
    const ids = JSON.parse(stored) as string[];
    return new Set(ids);
  } catch {
    return new Set();
  }
}

/**
 * Get all highlighted event IDs
 */
export function getHighlightedEvents(): Set<string> {
  if (typeof window === 'undefined') return new Set();
  try {
    const stored = localStorage.getItem(STORAGE_KEY_HIGHLIGHTED);
    if (!stored) return new Set();
    const ids = JSON.parse(stored) as string[];
    return new Set(ids);
  } catch {
    return new Set();
  }
}

/**
 * Check if an event is pinned
 */
export function isPinned(eventId: string): boolean {
  return getPinnedEvents().has(eventId);
}

/**
 * Check if an event is bookmarked
 */
export function isBookmarked(eventId: string): boolean {
  return getBookmarkedEvents().has(eventId);
}

/**
 * Check if an event is highlighted
 */
export function isHighlighted(eventId: string): boolean {
  return getHighlightedEvents().has(eventId);
}

/**
 * Toggle pin status of an event
 */
export function togglePin(eventId: string): boolean {
  const pinned = getPinnedEvents();
  const isCurrentlyPinned = pinned.has(eventId);
  
  if (isCurrentlyPinned) {
    pinned.delete(eventId);
  } else {
    pinned.add(eventId);
  }
  
  try {
    localStorage.setItem(STORAGE_KEY_PINNED, JSON.stringify(Array.from(pinned)));
    return !isCurrentlyPinned;
  } catch (error) {
    console.error('Failed to save pinned events:', error);
    return isCurrentlyPinned;
  }
}

/**
 * Toggle bookmark status of an event
 */
export function toggleBookmark(eventId: string): boolean {
  const bookmarked = getBookmarkedEvents();
  const isCurrentlyBookmarked = bookmarked.has(eventId);
  
  if (isCurrentlyBookmarked) {
    bookmarked.delete(eventId);
  } else {
    bookmarked.add(eventId);
  }
  
  try {
    localStorage.setItem(STORAGE_KEY_BOOKMARKED, JSON.stringify(Array.from(bookmarked)));
    return !isCurrentlyBookmarked;
  } catch (error) {
    console.error('Failed to save bookmarked events:', error);
    return isCurrentlyBookmarked;
  }
}

/**
 * Toggle highlight status of an event
 */
export function toggleHighlight(eventId: string): boolean {
  const highlighted = getHighlightedEvents();
  const isCurrentlyHighlighted = highlighted.has(eventId);
  
  if (isCurrentlyHighlighted) {
    highlighted.delete(eventId);
  } else {
    highlighted.add(eventId);
  }
  
  try {
    localStorage.setItem(STORAGE_KEY_HIGHLIGHTED, JSON.stringify(Array.from(highlighted)));
    return !isCurrentlyHighlighted;
  } catch (error) {
    console.error('Failed to save highlighted events:', error);
    return isCurrentlyHighlighted;
  }
}