import type { InstalledTheme } from './plugin-types';

/**
 * Resolve which logo to show. When the active theme carries brand logos
 * (logoLightUrl/logoDarkUrl), those win — so switching theme switches the whole
 * brand (VNClagoon wordmark ↔ SRC mark). Otherwise falls back to the globally
 * configured logo. Returns a raw path; the caller applies withBasePath().
 */
export function resolveThemeLogo(
  themes: InstalledTheme[],
  activeThemeId: string | null,
  isDark: boolean,
  fallbackLight: string,
  fallbackDark: string,
): string {
  const theme = activeThemeId ? themes.find((t) => t.id === activeThemeId) : undefined;
  if (theme) {
    const themed = isDark
      ? (theme.logoDarkUrl ?? theme.logoLightUrl)
      : (theme.logoLightUrl ?? theme.logoDarkUrl);
    if (themed) return themed;
  }
  return isDark ? (fallbackDark || fallbackLight) : (fallbackLight || fallbackDark);
}