figlet-ui/lib/figlet/fontLoader.ts

import type { FigletFont } from '@/types/figlet';

// Cache for loaded fonts
const fontCache = new Map<string, string>();

/**
 * Get list of all available figlet fonts
 */
export async function getFontList(): Promise<FigletFont[]> {
  try {
    const response = await fetch('/api/fonts');
    if (!response.ok) {
      throw new Error('Failed to fetch font list');
    }
    const fonts: FigletFont[] = await response.json();
    return fonts;
  } catch (error) {
    console.error('Error fetching font list:', error);
    return [];
  }
}

/**
 * Load a specific font file content
 */
export async function loadFont(fontName: string): Promise<string | null> {
  // Check cache first
  if (fontCache.has(fontName)) {
    return fontCache.get(fontName)!;
  }

  try {
    const response = await fetch(`/fonts/figlet-fonts/${fontName}.flf`);
    if (!response.ok) {
      throw new Error(`Failed to load font: ${fontName}`);
    }
    const fontData = await response.text();

    // Cache the font
    fontCache.set(fontName, fontData);

    return fontData;
  } catch (error) {
    console.error(`Error loading font ${fontName}:`, error);
    return null;
  }
}

/**
 * Preload a font into cache
 */
export async function preloadFont(fontName: string): Promise<void> {
  await loadFont(fontName);
}

/**
 * Clear font cache
 */
export function clearFontCache(): void {
  fontCache.clear();
}