/**
 * Fruit emojis paired with their avatar background color.
 * Single source of truth for both `getAvatarEmoji` and `getAvatarBgColor`.
 */
const FRUITS = [
  { emoji: '🍎', bgColor: '#FFD1DD' }, // Apple
  { emoji: '🍌', bgColor: '#FFF1C9' }, // Banana
  { emoji: '🍇', bgColor: '#E6D9FF' }, // Grape
  { emoji: '🍊', bgColor: '#D6F4FF' }, // Orange
  { emoji: '🍓', bgColor: '#FFE0AE' }, // Strawberry
  { emoji: '🥥', bgColor: '#F7E7D8' }, // Coconut
  { emoji: '🍒', bgColor: '#DFF4D8' }, // Cherry
  { emoji: '🥭', bgColor: '#FFD8C2' }, // Mango
  { emoji: '🍉', bgColor: '#D6EBFF' }, // Watermelon
  { emoji: '🍋', bgColor: '#CAEEB5' }, // Lemon
  { emoji: '🥝', bgColor: '#FFE7C7' }, // Kiwi
  { emoji: '🫒', bgColor: '#F6E3B4' }, // Olive
  { emoji: '🍈', bgColor: '#D9F7E1' }, // Melon
]

/**
 * Simple hash function to convert string to number
 */
function hashString(str: string): number {
  let hash = 0
  for (let i = 0; i < str.length; i++) {
    const char = str.charCodeAt(i)
    hash = (hash << 5) - hash + char
    hash = hash & hash // Convert to 32-bit integer
  }
  return Math.abs(hash)
}

/**
 * Pick a consistent fruit for an id string
 */
function getFruit(id: string) {
  return FRUITS[hashString(id) % FRUITS.length]
}

/**
 * Get a fruit emoji based on an id string
 * @param id - The string id to generate emoji from
 * @returns A fruit emoji string
 */
export function getAvatarEmoji(id: string): string {
  return getFruit(id).emoji
}

/**
 * Get the background color paired with an id's fruit emoji
 * @param id - The string id to generate the color from
 * @returns A hex color string
 */
export function getAvatarBgColor(id: string): string {
  return getFruit(id).bgColor
}