/**
 * Skateboard emoji rating system for SkateSpots
 * Uses 🛹 emojis instead of stars, from 1 to 10
 */

/**
 * Generate skateboard rating display (1-10 skateboards based on count)
 * @param count - The count to convert to a rating (sales, reviews, etc.)
 * @param maxDisplay - Maximum skateboards to display (default 10)
 * @returns Object with emoji string and numeric rating
 */
export function getSkateboardRating(count: number, maxDisplay = 10): { 
  rating: number; 
  display: string; 
  label: string;
} {
  // Scale: 1-10 based on count thresholds
  let rating: number;
  let label: string;

  if (count === 0) {
    rating = 0;
    label = 'New';
  } else if (count === 1) {
    rating = 1;
    label = 'Just starting';
  } else if (count <= 3) {
    rating = 2;
    label = 'Getting known';
  } else if (count <= 5) {
    rating = 3;
    label = 'Building rep';
  } else if (count <= 8) {
    rating = 4;
    label = 'Solid';
  } else if (count <= 12) {
    rating = 5;
    label = 'Reliable';
  } else if (count <= 18) {
    rating = 6;
    label = 'Well known';
  } else if (count <= 25) {
    rating = 7;
    label = 'Established';
  } else if (count <= 35) {
    rating = 8;
    label = 'Trusted';
  } else if (count <= 50) {
    rating = 9;
    label = 'Pro seller';
  } else {
    rating = 10;
    label = 'Legendary';
  }

  // Clamp to max display
  const displayRating = Math.min(rating, maxDisplay);
  const display = '🛹'.repeat(displayRating);

  return { rating, display, label };
}

/**
 * Get skateboard rating for skate spots (based on reviews/ratings)
 * @param reviewCount - Number of reviews
 * @param averageRating - Average rating (1-5 scale typically)
 * @returns Object with emoji string and numeric rating
 */
export function getSpotSkateboardRating(reviewCount: number, averageRating: number = 0): {
  rating: number;
  display: string;
  label: string;
} {
  // Combine review count and average rating for final score
  // Weight: 60% average rating, 40% review count factor
  let rating: number;
  let label: string;

  if (reviewCount === 0) {
    rating = 0;
    label = 'No reviews';
  } else {
    // Scale average rating (1-5) to (2-10)
    const ratingScore = ((averageRating - 1) / 4) * 8 + 2;
    
    // Review count bonus (up to +2 for 20+ reviews)
    const countBonus = Math.min(reviewCount / 10, 2);
    
    rating = Math.round(Math.min(ratingScore + countBonus, 10));
    
    if (rating <= 2) label = 'Sketchy';
    else if (rating <= 4) label = 'Decent';
    else if (rating <= 6) label = 'Solid spot';
    else if (rating <= 8) label = 'Classic';
    else label = 'Legendary';
  }

  const display = rating > 0 ? '🛹'.repeat(rating) : '';

  return { rating, display, label };
}

/**
 * Compact display for tight spaces (shows count + single emoji)
 */
export function getCompactRating(count: number): string {
  if (count === 0) return '🛹 0';
  return `🛹 ${count}`;
}

/**
 * Trust badge configurations matching the skateboard theme
 */
export const SELLER_TRUST_BADGES = {
  verified: { 
    emoji: '✅', 
    label: 'Verified', 
    description: 'You follow them directly',
    className: 'border-green-500/50 text-green-400 bg-green-500/10'
  },
  trusted: { 
    emoji: '🛡️', 
    label: 'Trusted', 
    description: 'Friend-of-friend or NIP-05',
    className: 'border-blue-500/50 text-blue-400 bg-blue-500/10'
  },
  new: { 
    emoji: '⚠️', 
    label: 'New', 
    description: 'No trust signals yet',
    className: 'border-yellow-500/50 text-yellow-400 bg-yellow-500/10'
  },
} as const;

export type TrustLevel = keyof typeof SELLER_TRUST_BADGES;

/**
 * Get trust level from trust score
 */
export function getTrustLevel(trustScore: number | undefined): TrustLevel {
  if (trustScore === undefined || trustScore < 50) return 'new';
  if (trustScore >= 90) return 'verified';
  return 'trusted';
}