/**
 * ХУКА ДЛЯ ЛОГИКИ КОРЗИНЫ ПОСТАВОК
 *
 * Выделена из create-suppliers-supply-page.tsx
 * Управляет корзиной товаров и настройками поставки
 */

import { useMutation } from '@apollo/client'
import { useRouter } from 'next/navigation'
import { useState, useMemo } from 'react'
import { toast } from 'sonner'

import { CREATE_SUPPLY_ORDER } from '@/graphql/mutations'

import type {
  SelectedGoodsItem,
  GoodsSupplier,
  GoodsProduct,
  ProductRecipe,
  SupplyCreationFormData,
} from '../types/supply-creation.types'

interface UseSupplyCartProps {
  selectedSupplier: GoodsSupplier | null
  allCounterparties: GoodsSupplier[]
  productRecipes: Record<string, ProductRecipe>
}

export function useSupplyCart({ selectedSupplier, allCounterparties, productRecipes }: UseSupplyCartProps) {
  const router = useRouter()

  // Состояния корзины и настроек
  const [selectedGoods, setSelectedGoods] = useState<SelectedGoodsItem[]>([])
  const [deliveryDate, setDeliveryDate] = useState('')
  const [selectedLogistics, setSelectedLogistics] = useState<string>('auto')
  const [selectedFulfillment, setSelectedFulfillment] = useState<string>('')
  const [isCreatingSupply, setIsCreatingSupply] = useState(false)

  // Мутация создания поставки
  const [createSupplyOrder] = useMutation(CREATE_SUPPLY_ORDER)

  // Получаем логистические компании
  const logisticsCompanies = useMemo(() => {
    return allCounterparties?.filter((partner) => partner.type === 'LOGIST') || []
  }, [allCounterparties])

  // Добавление товара в корзину
  const addToCart = (
    product: GoodsProduct,
    quantity: number,
    additionalData?: {
      completeness?: string
      recipe?: string
      specialRequirements?: string
      parameters?: Array<{ name: string; value: string }>
    },
  ) => {
    if (!selectedSupplier) {
      toast.error('Сначала выберите поставщика')
      return
    }

    if (quantity <= 0) {
      toast.error('Укажите количество товара')
      return
    }

    const existingItemIndex = selectedGoods.findIndex((item) => item.id === product.id)

    if (existingItemIndex >= 0) {
      // Обновляем существующий товар
      setSelectedGoods((prev) => {
        const updated = [...prev]
        updated[existingItemIndex] = {
          ...updated[existingItemIndex],
          selectedQuantity: quantity,
          ...additionalData,
        }
        return updated
      })
      toast.success('Количество товара обновлено')
    } else {
      // Добавляем новый товар
      const newItem: SelectedGoodsItem = {
        id: product.id,
        name: product.name,
        sku: product.article,
        price: product.price,
        selectedQuantity: quantity,
        unit: product.unit,
        category: product.category?.name,
        supplierId: selectedSupplier?.id || '',
        supplierName: selectedSupplier?.name || selectedSupplier?.fullName || '',
        completeness: additionalData?.completeness,
        recipe: additionalData?.recipe,
        specialRequirements: additionalData?.specialRequirements,
        parameters: additionalData?.parameters,
      }

      setSelectedGoods((prev) => [...prev, newItem])
      toast.success('Товар добавлен в корзину')
    }
  }

  // Удаление товара из корзины
  const removeFromCart = (itemId: string) => {
    setSelectedGoods((prev) => prev.filter((item) => item.id !== itemId))
    toast.success('Товар удален из корзины')
  }

  // Функция расчета полной стоимости товара с рецептурой
  const getProductTotalWithRecipe = useCallback(
    (productId: string, quantity: number) => {
      const product = selectedGoods.find((p) => p.id === productId)
      if (!product) return 0

      const baseTotal = product.price * quantity
      const recipe = productRecipes[productId]

      if (!recipe) return baseTotal

      // Здесь будет логика расчета стоимости услуг и расходников
      // Пока возвращаем базовую стоимость
      return baseTotal
    },
    [selectedGoods, productRecipes],
  )

  // Расчеты для корзины
  const totalGoodsAmount = useMemo(() => {
    return selectedGoods.reduce((sum, item) => {
      return sum + getProductTotalWithRecipe(item.id, item.selectedQuantity)
    }, 0)
  }, [selectedGoods, getProductTotalWithRecipe])

  const totalQuantity = useMemo(() => {
    return selectedGoods.reduce((sum, item) => sum + item.selectedQuantity, 0)
  }, [selectedGoods])

  // Валидация формы
  const hasRequiredServices = useMemo(() => {
    return selectedGoods.every((item) => productRecipes[item.id]?.selectedServices?.length > 0)
  }, [selectedGoods, productRecipes])

  const isFormValid = useMemo(() => {
    return selectedSupplier && selectedGoods.length > 0 && deliveryDate && selectedFulfillment && hasRequiredServices
  }, [selectedSupplier, selectedGoods.length, deliveryDate, selectedFulfillment, hasRequiredServices])

  // Создание поставки
  const handleCreateSupply = async () => {
    if (!isFormValid) {
      if (!hasRequiredServices) {
        toast.error('Каждый товар должен иметь минимум 1 услугу фулфилмента')
      } else {
        toast.error('Заполните все обязательные поля')
      }
      return
    }

    if (!selectedSupplier) {
      toast.error('Поставщик не выбран')
      return
    }

    setIsCreatingSupply(true)

    try {
      await createSupplyOrder({
        variables: {
          supplierId: selectedSupplier?.id || '',
          fulfillmentCenterId: selectedFulfillment,
          items: selectedGoods.map((item) => ({
            productId: item.id,
            quantity: item.selectedQuantity,
            recipe: productRecipes[item.id] || {
              productId: item.id,
              selectedServices: [],
              selectedFFConsumables: [],
              selectedSellerConsumables: [],
            },
          })),
          deliveryDate: deliveryDate,
          logistics: selectedLogistics,
          specialRequirements: selectedGoods
            .map((item) => item.specialRequirements)
            .filter(Boolean)
            .join('; '),
        } satisfies SupplyCreationFormData,
      })

      toast.success('Поставка успешно создана!')
      router.push('/supplies')
    } catch (error) {
      console.error('❌ Ошибка создания поставки:', error)
      toast.error('Ошибка при создании поставки')
    } finally {
      setIsCreatingSupply(false)
    }
  }

  return {
    // Состояние корзины
    selectedGoods,
    setSelectedGoods,
    deliveryDate,
    setDeliveryDate,
    selectedLogistics,
    setSelectedLogistics,
    selectedFulfillment,
    setSelectedFulfillment,
    isCreatingSupply,

    // Данные
    logisticsCompanies,

    // Расчеты
    totalGoodsAmount,
    totalQuantity,

    // Валидация
    hasRequiredServices,
    isFormValid,

    // Функции управления корзиной
    addToCart,
    removeFromCart,
    getProductTotalWithRecipe,
    handleCreateSupply,
  }
}