let cachedPlatform: string | null = null;

/**
 * Gets the current platform from Electron
 */
const getPlatform = async (): Promise<string> => {
  if (cachedPlatform) return cachedPlatform;
  
  try {
    const platform = await window.electronAPI.getPlatform();
    cachedPlatform = platform;
    return platform;
  } catch (error) {
    console.warn('Failed to get platform from Electron, falling back to navigator:', error);
    // Fallback for development/testing
    let fallbackPlatform = 'win32';
    if (typeof navigator !== 'undefined' && /Mac|iPhone|iPad|iPod/.test(navigator.platform)) {
      fallbackPlatform = 'darwin';
    }
    cachedPlatform = fallbackPlatform;
    return fallbackPlatform;
  }
};

/**
 * Detects if the current platform is macOS
 */
export const isMac = async (): Promise<boolean> => {
  const platform = await getPlatform();
  return platform === 'darwin';
};

/**
 * Gets the modifier key symbol based on the platform
 */
export const getModifierKey = async (): Promise<string> => {
  return (await isMac()) ? '⌘' : 'Ctrl';
};

/**
 * Gets the shift key symbol based on the platform
 */
export const getShiftKey = async (): Promise<string> => {
  return (await isMac()) ? '⇧' : 'Shift';
};

/**
 * Formats a keyboard shortcut for display based on the platform
 * @param keys Array of key combinations (e.g., ['mod', 'D'] or ['shift', 'mod', 'Scroll'])
 */
export const formatShortcut = async (keys: string[]): Promise<string> => {
  const isMacPlatform = await isMac();
  return keys
    .map(key => {
      if (key.toLowerCase() === 'mod') return isMacPlatform ? '⌘' : 'Ctrl';
      if (key.toLowerCase() === 'shift') return isMacPlatform ? '⇧' : 'Shift';
      return key;
    })
    .join(' + ');
};