import {
  GetProductsDocument,
  GetProductsBySupplierDocument,
  GetProductsNearHubDocument
} from '~/composables/graphql/public/geo-generated'

// Shared state
const items = ref<any[]>([])
const isLoading = ref(false)
const isLoadingMore = ref(false)
const isInitialized = ref(false)

// Filter state
const filterSupplierUuid = ref<string | null>(null)
const filterHubUuid = ref<string | null>(null)

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

  // Products don't have server-side pagination yet, so we load all at once
  const canLoadMore = computed(() => false)

  const fetchProducts = async () => {
    if (isLoading.value) return
    isLoading.value = true
    try {
      let data

      if (filterSupplierUuid.value) {
        // Products from specific supplier
        data = await execute(
          GetProductsBySupplierDocument,
          { supplierUuid: filterSupplierUuid.value },
          'public',
          'geo'
        )
        items.value = data?.productsBySupplier || []
      } else if (filterHubUuid.value) {
        // Products near hub
        data = await execute(
          GetProductsNearHubDocument,
          { hubUuid: filterHubUuid.value },
          'public',
          'geo'
        )
        items.value = data?.productsNearHub || []
      } else {
        // All products
        data = await execute(
          GetProductsDocument,
          {},
          'public',
          'geo'
        )
        items.value = data?.products || []
      }

      isInitialized.value = true
    } finally {
      isLoading.value = false
    }
  }

  const loadMore = async () => {
    // No-op: products don't support pagination yet
  }

  const init = async () => {
    if (!isInitialized.value && items.value.length === 0) {
      await fetchProducts()
    }
  }

  // Filter setters
  const setSupplierFilter = (uuid: string | null) => {
    if (filterSupplierUuid.value !== uuid) {
      filterSupplierUuid.value = uuid
      filterHubUuid.value = null // clear other filter
      isInitialized.value = false
      fetchProducts()
    }
  }

  const setHubFilter = (uuid: string | null) => {
    if (filterHubUuid.value !== uuid) {
      filterHubUuid.value = uuid
      filterSupplierUuid.value = null // clear other filter
      isInitialized.value = false
      fetchProducts()
    }
  }

  const clearFilters = () => {
    if (filterSupplierUuid.value || filterHubUuid.value) {
      filterSupplierUuid.value = null
      filterHubUuid.value = null
      isInitialized.value = false
      fetchProducts()
    }
  }

  return {
    items,
    isLoading,
    isLoadingMore,
    isInitialized,
    canLoadMore,
    fetchProducts,
    loadMore,
    init,
    setSupplierFilter,
    setHubFilter,
    clearFilters
  }
}