/**
 * Unsplash Image Utility
 * Provides free stock images for AeThex Connect
 * Uses Unsplash Source API (no key required for basic usage)
 */

// Curated gaming/tech collection IDs from Unsplash
const COLLECTIONS = {
  gaming: '1424240', // Gaming collection
  tech: '3582603',   // Technology collection
  neon: '1459961',   // Neon/cyberpunk aesthetic
  dark: '827743',    // Dark moody shots
  abstract: '1065976', // Abstract patterns
};

/**
 * Get a random image URL from Unsplash
 * @param {Object} options
 * @param {number} options.width - Image width
 * @param {number} options.height - Image height  
 * @param {string} options.query - Search query
 * @param {string} options.collection - Collection ID
 * @returns {string} Image URL
 */
export function getUnsplashImage({ width = 1920, height = 1080, query, collection } = {}) {
  const base = 'https://source.unsplash.com';
  
  if (collection && COLLECTIONS[collection]) {
    return `${base}/collection/${COLLECTIONS[collection]}/${width}x${height}`;
  }
  
  if (query) {
    return `${base}/${width}x${height}/?${encodeURIComponent(query)}`;
  }
  
  return `${base}/random/${width}x${height}`;
}

/**
 * Get a gaming-themed background
 */
export function getGamingBackground(width = 1920, height = 1080) {
  return getUnsplashImage({ width, height, query: 'gaming,neon,dark' });
}

/**
 * Get a tech-themed background
 */
export function getTechBackground(width = 1920, height = 1080) {
  return getUnsplashImage({ width, height, query: 'technology,dark,abstract' });
}

/**
 * Get a random avatar placeholder
 * Uses specific seeds for consistency
 */
export function getAvatarImage(seed, size = 200) {
  // Use DiceBear for avatars (more reliable than Unsplash for small images)
  const styles = ['adventurer', 'avataaars', 'bottts', 'fun-emoji', 'lorelei', 'notionists', 'personas'];
  const style = styles[Math.abs(hashCode(seed)) % styles.length];
  return `https://api.dicebear.com/7.x/${style}/svg?seed=${encodeURIComponent(seed)}&size=${size}`;
}

/**
 * Get abstract pattern for cards/backgrounds
 */
export function getAbstractPattern(width = 800, height = 600) {
  return getUnsplashImage({ width, height, query: 'abstract,gradient,dark' });
}

/**
 * Prebuilt image URLs for specific use cases
 */
export const PRESET_IMAGES = {
  heroBackground: 'https://images.unsplash.com/photo-1538481199705-c710c4e965fc?w=1920&q=80', // Gaming setup
  loginBackground: 'https://images.unsplash.com/photo-1550745165-9bc0b252726f?w=1920&q=80', // Retro gaming
  chatBackground: 'https://images.unsplash.com/photo-1614850523459-c2f4c699c52e?w=1920&q=80', // Dark abstract
  serverBanner: 'https://images.unsplash.com/photo-1542751371-adc38448a05e?w=1200&q=80', // Esports
  profileBanner: 'https://images.unsplash.com/photo-1511512578047-dfb367046420?w=1200&q=80', // Gaming aesthetic
  defaultAvatar: 'https://images.unsplash.com/photo-1566577134770-3d85bb3a9cc4?w=400&q=80', // Abstract
  voiceChannel: 'https://images.unsplash.com/photo-1598488035139-bdbb2231ce04?w=800&q=80', // Audio waves
  premiumBanner: 'https://images.unsplash.com/photo-1557682250-33bd709cbe85?w=1200&q=80', // Purple gradient
};

/**
 * Simple hash function for consistent results
 */
function hashCode(str) {
  let hash = 0;
  for (let i = 0; i < str.length; i++) {
    const char = str.charCodeAt(i);
    hash = ((hash << 5) - hash) + char;
    hash = hash & hash;
  }
  return hash;
}

export default {
  getUnsplashImage,
  getGamingBackground,
  getTechBackground,
  getAvatarImage,
  getAbstractPattern,
  PRESET_IMAGES,
  COLLECTIONS,
};