webapp/app/composables/useCatalogSuppliers.ts

import { GetSupplierProfilesDocument } from '~/composables/graphql/public/exchange-generated'

const PAGE_SIZE = 24

// Shared state across list and map views
const items = ref<any[]>([])
const total = ref(0)
const isLoading = ref(false)
const isLoadingMore = ref(false)
const isInitialized = ref(false)

export function useCatalogSuppliers() {
  const { execute } = useGraphQL()

  const itemsWithCoords = computed(() =>
    items.value.filter(s => s.latitude && s.longitude)
  )

  const canLoadMore = computed(() => items.value.length < total.value)

  const fetchPage = async (offset: number, replace = false) => {
    if (replace) isLoading.value = true
    try {
      const data = await execute(
        GetSupplierProfilesDocument,
        { limit: PAGE_SIZE, offset },
        'public',
        'exchange'
      )
      const next = data?.getSupplierProfiles || []
      items.value = replace ? next : items.value.concat(next)
      total.value = data?.getSupplierProfilesCount ?? total.value
      isInitialized.value = true
    } finally {
      isLoading.value = false
    }
  }

  const loadMore = async () => {
    if (isLoadingMore.value) return
    isLoadingMore.value = true
    try {
      await fetchPage(items.value.length)
    } finally {
      isLoadingMore.value = false
    }
  }

  // Initialize data if not already loaded
  const init = async () => {
    if (!isInitialized.value && items.value.length === 0) {
      await fetchPage(0, true)
    }
  }

  return {
    items,
    total,
    isLoading,
    isLoadingMore,
    itemsWithCoords,
    canLoadMore,
    fetchPage,
    loadMore,
    init
  }
}