/**
 * Client favorites — star customers for quick dashboard access.
 * Persisted in localStorage. Stores customer IDs.
 */
import { useLocalStorageRef } from '~/utils/useLocalStorageRef'

const KEY = 'policy-ui-client-favorites-v1'

export function useClientFavorites() {
  const favoriteIds = useLocalStorageRef<string[]>(KEY, () => [])

  function isFavorite(customerId: string) {
    return favoriteIds.value.includes(customerId)
  }

  function toggleFavorite(customerId: string) {
    if (isFavorite(customerId)) {
      favoriteIds.value = favoriteIds.value.filter(id => id !== customerId)
    } else {
      favoriteIds.value = [customerId, ...favoriteIds.value]
    }
  }

  function addFavorite(customerId: string) {
    if (!isFavorite(customerId)) {
      favoriteIds.value = [customerId, ...favoriteIds.value]
    }
  }

  function removeFavorite(customerId: string) {
    favoriteIds.value = favoriteIds.value.filter(id => id !== customerId)
  }

  return { favoriteIds, isFavorite, toggleFavorite, addFavorite, removeFavorite }
}