/** 런타임 플랫폼 — web · desktop(Tauri) · mobile(Capacitor) */
export type RuntimePlatform = 'web' | 'desktop' | 'mobile';

export function isDesktop(): boolean {
  if (typeof window === 'undefined') return false;
  if ('__TAURI__' in window || '__TAURI_INTERNALS__' in window) return true;
  return document.documentElement.classList.contains('desktop-client');
}

export function isMobileCapacitor(): boolean {
  if (typeof window === 'undefined') return false;
  try {
    // Capacitor injects on native; avoid hard dependency
    const cap = (window as Window & { Capacitor?: { isNativePlatform?: () => boolean } }).Capacitor;
    return cap?.isNativePlatform?.() === true;
  } catch {
    return false;
  }
}

export function getRuntimePlatform(): RuntimePlatform {
  if (isDesktop()) return 'desktop';
  if (isMobileCapacitor()) return 'mobile';
  return 'web';
}

export function isWeb(): boolean {
  return getRuntimePlatform() === 'web';
}