'use client'

import { useQuery } from '@apollo/client'
import { Package, Wrench, AlertTriangle, CheckCircle, Clock } from 'lucide-react'
import React, { useState, useMemo, useCallback } from 'react'
import { toast } from 'sonner'

import { Sidebar } from '@/components/dashboard/sidebar'
import { GET_MY_FULFILLMENT_SUPPLIES } from '@/graphql/queries'
import { useSidebar } from '@/hooks/useSidebar'

// Новые компоненты
import { SuppliesGrid } from './supplies-grid'
import { SuppliesHeader } from './supplies-header'
import { SuppliesList } from './supplies-list'
import { SuppliesStats } from './supplies-stats'

// Типы
import { Supply, FilterState, SortState, ViewMode, GroupBy, StatusConfig } from './types'

// Статусы расходников с цветами
const STATUS_CONFIG = {
  'in-stock': {
    label: 'Доступен',
    color: 'bg-green-500/20 text-green-300',
    icon: CheckCircle,
  },
  'in-transit': {
    label: 'В пути',
    color: 'bg-blue-500/20 text-blue-300',
    icon: Clock,
  },
  confirmed: {
    label: 'Подтверждено',
    color: 'bg-cyan-500/20 text-cyan-300',
    icon: CheckCircle,
  },
  planned: {
    label: 'Запланировано',
    color: 'bg-yellow-500/20 text-yellow-300',
    icon: Clock,
  },
  // Обратная совместимость и специальные статусы
  available: {
    label: 'Доступен',
    color: 'bg-green-500/20 text-green-300',
    icon: CheckCircle,
  },
  'low-stock': {
    label: 'Мало на складе',
    color: 'bg-yellow-500/20 text-yellow-300',
    icon: AlertTriangle,
  },
  'out-of-stock': {
    label: 'Нет в наличии',
    color: 'bg-red-500/20 text-red-300',
    icon: AlertTriangle,
  },
  reserved: {
    label: 'Зарезервирован',
    color: 'bg-purple-500/20 text-purple-300',
    icon: Package,
  },
} as const

export function FulfillmentSuppliesPage() {
  const { getSidebarMargin } = useSidebar()

  // Состояния
  const [viewMode, setViewMode] = useState<ViewMode>('grid')
  const [filters, setFilters] = useState<FilterState>({
    search: '',
    category: '',
    status: '',
    supplier: '',
    lowStock: false,
  })
  const [sort, setSort] = useState<SortState>({
    field: 'name',
    direction: 'asc',
  })
  const [showFilters, setShowFilters] = useState(false)
  const [groupBy, setGroupBy] = useState<GroupBy>('none')
  const [expandedSupplies, setExpandedSupplies] = useState<Set<string>>(new Set())

  // Загрузка данных
  const {
    data: suppliesData,
    loading,
    error,
    refetch,
  } = useQuery(GET_MY_FULFILLMENT_SUPPLIES, {
    fetchPolicy: 'cache-and-network',
    onError: (error) => {
      toast.error('Ошибка загрузки расходников фулфилмента: ' + error.message)
    },
  })

  const supplies: Supply[] = suppliesData?.myFulfillmentSupplies || []

  // Логирование для отладки
  console.warn('🔥🔥🔥 FULFILLMENT SUPPLIES PAGE DATA 🔥🔥🔥', {
    suppliesCount: supplies.length,
    supplies: supplies.map((s) => ({
      id: s.id,
      name: s.name,
      status: s.status,
      currentStock: s.currentStock,
      quantity: s.quantity,
    })),
  })

  // Функции
  const getStatusConfig = useCallback((status: string): StatusConfig => {
    return STATUS_CONFIG[status as keyof typeof STATUS_CONFIG] || STATUS_CONFIG.available
  }, [])

  const getSupplyDeliveries = useCallback(
    (supply: Supply): Supply[] => {
      return supplies.filter((s) => s.name === supply.name && s.category === supply.category)
    },
    [supplies],
  )

  // Объединение одинаковых расходников
  const consolidatedSupplies = useMemo(() => {
    const grouped = supplies.reduce(
      (acc, supply) => {
        const key = `${supply.name}-${supply.category}`
        if (!acc[key]) {
          acc[key] = {
            ...supply,
            currentStock: 0,
            quantity: 0, // Общее количество поставленного (= заказанному)
            price: 0,
            totalCost: 0, // Общая стоимость
            shippedQuantity: 0, // Общее отправленное количество
          }
        }

        // Суммируем поставленное количество (заказано = поставлено)
        acc[key].quantity += supply.quantity

        // Суммируем отправленное количество
        acc[key].shippedQuantity += supply.shippedQuantity || 0

        // Остаток = Поставлено - Отправлено
        // Если ничего не отправлено, то остаток = поставлено
        acc[key].currentStock = acc[key].quantity - acc[key].shippedQuantity

        // Рассчитываем общую стоимость (количество × цена)
        acc[key].totalCost += supply.quantity * supply.price

        // Средневзвешенная цена за единицу
        if (acc[key].quantity > 0) {
          acc[key].price = acc[key].totalCost / acc[key].quantity
        }

        return acc
      },
      {} as Record<string, Supply & { totalCost: number }>,
    )

    return Object.values(grouped)
  }, [supplies])

  // Фильтрация и сортировка
  const filteredAndSortedSupplies = useMemo(() => {
    const filtered = consolidatedSupplies.filter((supply) => {
      const matchesSearch =
        supply.name.toLowerCase().includes(filters.search.toLowerCase()) ||
        supply.description.toLowerCase().includes(filters.search.toLowerCase())
      const matchesCategory = !filters.category || supply.category === filters.category
      const matchesStatus = !filters.status || supply.status === filters.status
      const matchesSupplier =
        !filters.supplier || supply.supplier.toLowerCase().includes(filters.supplier.toLowerCase())
      const matchesLowStock = !filters.lowStock || (supply.currentStock <= supply.minStock && supply.currentStock > 0)

      return matchesSearch && matchesCategory && matchesStatus && matchesSupplier && matchesLowStock
    })

    // Сортировка
    filtered.sort((a, b) => {
      let aValue: any = a[sort.field]
      let bValue: any = b[sort.field]

      if (typeof aValue === 'string') {
        aValue = aValue.toLowerCase()
        bValue = bValue.toLowerCase()
      }

      if (sort.direction === 'asc') {
        return aValue > bValue ? 1 : -1
      } else {
        return aValue < bValue ? 1 : -1
      }
    })

    return filtered
  }, [consolidatedSupplies, filters, sort])

  // Группировка
  const groupedSupplies = useMemo(() => {
    if (groupBy === 'none') return { 'Все расходники': filteredAndSortedSupplies }

    return filteredAndSortedSupplies.reduce(
      (acc, supply) => {
        const key = supply[groupBy] || 'Без категории'
        if (!acc[key]) acc[key] = []
        acc[key].push(supply)
        return acc
      },
      {} as Record<string, Supply[]>,
    )
  }, [filteredAndSortedSupplies, groupBy])

  // Обработчики
  const handleSort = useCallback((field: SortState['field']) => {
    setSort((prev) => ({
      field,
      direction: prev.field === field && prev.direction === 'asc' ? 'desc' : 'asc',
    }))
  }, [])

  const toggleSupplyExpansion = useCallback((supplyId: string) => {
    setExpandedSupplies((prev) => {
      const newSet = new Set(prev)
      if (newSet.has(supplyId)) {
        newSet.delete(supplyId)
      } else {
        newSet.add(supplyId)
      }
      return newSet
    })
  }, [])

  const handleExport = useCallback(() => {
    const csvData = filteredAndSortedSupplies.map((supply) => ({
      Название: supply.name,
      Описание: supply.description,
      Категория: supply.category,
      Статус: getStatusConfig(supply.status).label,
      'Текущий остаток': supply.currentStock,
      'Минимальный остаток': supply.minStock,
      Единица: supply.unit,
      Цена: supply.price,
      Поставщик: supply.supplier,
      'Дата создания': new Date(supply.createdAt).toLocaleDateString('ru-RU'),
    }))

    const csv = [Object.keys(csvData[0]).join(','), ...csvData.map((row) => Object.values(row).join(','))].join('\n')

    const blob = new Blob([csv], { type: 'text/csv;charset=utf-8;' })
    const link = document.createElement('a')
    link.href = URL.createObjectURL(blob)
    link.download = `расходники_фулфилмента_${new Date().toISOString().split('T')[0]}.csv`
    link.click()

    toast.success('Данные экспортированы в CSV')
  }, [filteredAndSortedSupplies, getStatusConfig])

  const handleRefresh = useCallback(() => {
    refetch()
    toast.success('Данные обновлены')
  }, [refetch])

  if (loading) {
    return (
      <div className="h-screen flex overflow-hidden">
        <Sidebar />
        <main
          className={`flex-1 ${getSidebarMargin()} px-4 py-3 flex flex-col transition-all duration-300 overflow-hidden`}
        >
          <div className="flex-1 overflow-y-auto flex items-center justify-center">
            <div className="text-white">Загрузка...</div>
          </div>
        </main>
      </div>
    )
  }

  if (error) {
    return (
      <div className="h-screen flex overflow-hidden">
        <Sidebar />
        <main
          className={`flex-1 ${getSidebarMargin()} px-4 py-3 flex flex-col transition-all duration-300 overflow-hidden`}
        >
          <div className="flex-1 overflow-y-auto flex items-center justify-center">
            <div className="text-red-300">Ошибка загрузки: {error.message}</div>
          </div>
        </main>
      </div>
    )
  }

  return (
    <div className="h-screen flex overflow-hidden">
      <Sidebar />
      <main
        className={`flex-1 ${getSidebarMargin()} px-4 py-3 flex flex-col transition-all duration-300 overflow-hidden`}
      >
        <div className="flex-1 overflow-y-auto space-y-6">
          {/* Заголовок и фильтры */}
          <SuppliesHeader
            viewMode={viewMode}
            onViewModeChange={setViewMode}
            groupBy={groupBy}
            onGroupByChange={setGroupBy}
            filters={filters}
            onFiltersChange={setFilters}
            showFilters={showFilters}
            onToggleFilters={() => setShowFilters(!showFilters)}
            onExport={handleExport}
            onRefresh={handleRefresh}
          />

          {/* Статистика */}
          <SuppliesStats supplies={consolidatedSupplies} />

          {/* Основной контент */}
          <div className="space-y-6">
            {groupBy === 'none' ? (
              // Без группировки
              <>
                {viewMode === 'grid' && (
                  <SuppliesGrid
                    supplies={filteredAndSortedSupplies}
                    expandedSupplies={expandedSupplies}
                    onToggleExpansion={toggleSupplyExpansion}
                    getSupplyDeliveries={getSupplyDeliveries}
                    getStatusConfig={getStatusConfig}
                  />
                )}

                {viewMode === 'list' && (
                  <SuppliesList
                    supplies={filteredAndSortedSupplies}
                    expandedSupplies={expandedSupplies}
                    onToggleExpansion={toggleSupplyExpansion}
                    getSupplyDeliveries={getSupplyDeliveries}
                    getStatusConfig={getStatusConfig}
                    sort={sort}
                    onSort={handleSort}
                  />
                )}

                {viewMode === 'analytics' && (
                  <div className="text-center text-white/60 py-12">Аналитический режим будет добавлен позже</div>
                )}
              </>
            ) : (
              // С группировкой
              <div className="space-y-6">
                {Object.entries(groupedSupplies).map(([groupName, groupSupplies]) => (
                  <div key={groupName} className="space-y-4">
                    <h3 className="text-lg font-semibold text-white flex items-center space-x-2">
                      <span>{groupName}</span>
                      <span className="text-sm text-white/60">({groupSupplies.length})</span>
                    </h3>

                    {viewMode === 'grid' && (
                      <SuppliesGrid
                        supplies={groupSupplies}
                        expandedSupplies={expandedSupplies}
                        onToggleExpansion={toggleSupplyExpansion}
                        getSupplyDeliveries={getSupplyDeliveries}
                        getStatusConfig={getStatusConfig}
                      />
                    )}

                    {viewMode === 'list' && (
                      <SuppliesList
                        supplies={groupSupplies}
                        expandedSupplies={expandedSupplies}
                        onToggleExpansion={toggleSupplyExpansion}
                        getSupplyDeliveries={getSupplyDeliveries}
                        getStatusConfig={getStatusConfig}
                        sort={sort}
                        onSort={handleSort}
                      />
                    )}
                  </div>
                ))}
              </div>
            )}
          </div>
        </div>
      </main>
    </div>
  )
}