const DICEBEAR_STYLE = 'notionists'
const DICEBEAR_BACKGROUNDS = ['f6efe3', 'e7f4ee', 'eef2ff', 'fff1dc', 'fce7f3']

function hashProfileAvatarValue(value: string) {
  return [...value].reduce((acc, char) => {
    return (acc * 33 + char.charCodeAt(0)) >>> 0
  }, 5381)
}

export function profileAvatarSeedFromValue(value?: string | null) {
  const normalized = String(value || 'profile').trim() || 'profile'
  return `gl-${hashProfileAvatarValue(normalized).toString(36)}`
}

export function profileAvatarUrl(seed?: string | null) {
  const params = new URLSearchParams({
    seed: String(seed || 'profile').trim() || 'profile',
    radius: '32',
    backgroundColor: DICEBEAR_BACKGROUNDS.join(','),
  })

  return `https://api.dicebear.com/9.x/${DICEBEAR_STYLE}/svg?${params.toString()}`
}