import { ref, type Ref } from 'vue'

interface PaginatedResult<T> {
  items: T[]
  total: number
}

interface AdminPaginatedTableOptions<T> {
  fetchFn: (page: number, pageSize: number) => Promise<PaginatedResult<T>>
  defaultPageSize?: number
  immediate?: boolean
}

interface AdminPaginatedTableResult<T> {
  loading: Ref<boolean>
  data: Ref<T[]>
  total: Ref<number>
  currentPage: Ref<number>
  currentPageSize: Ref<number>
  load: () => Promise<void>
  handleSizeChange: () => void
}

export function useAdminPaginatedTable<T>(options: AdminPaginatedTableOptions<T>): AdminPaginatedTableResult<T> {
  const loading = ref(false)
  const data = ref<T[]>([]) as Ref<T[]>
  const total = ref(0)
  const currentPage = ref(1)
  const currentPageSize = ref(options.defaultPageSize || 20)

  async function load() {
    loading.value = true
    try {
      const result = await options.fetchFn(currentPage.value, currentPageSize.value)
      data.value = result.items
      total.value = result.total
    } finally {
      loading.value = false
    }
  }

  function handleSizeChange() {
    currentPage.value = 1
    load()
  }

  if (options.immediate !== false) {
    load()
  }

  return { loading, data, total, currentPage, currentPageSize, load, handleSizeChange }
}