'use client'

import { useMutation } from '@apollo/client'
import { ArrowLeft, ShoppingCart, Check, X } from 'lucide-react'
import { useState } from 'react'

import { Badge } from '@/components/ui/badge'
import { Button } from '@/components/ui/button'
import { Checkbox } from '@/components/ui/checkbox'
import { GlassInput } from '@/components/ui/input'
import { Label } from '@/components/ui/label'
import { ADD_MARKETPLACE_API_KEY } from '@/graphql/mutations'

import { AuthLayout } from './auth-layout'

interface ApiValidationData {
  sellerId?: string
  sellerName?: string
  tradeMark?: string
  isValid?: boolean
}

interface MarketplaceApiStepProps {
  onNext: (apiData: {
    wbApiKey?: string
    wbApiValidation?: ApiValidationData
    ozonApiKey?: string
    ozonApiValidation?: ApiValidationData
  }) => void
  onBack: () => void
}

interface ApiKeyValidation {
  [key: string]: {
    isValid: boolean | null
    isValidating: boolean
    error?: string
  }
}

export function MarketplaceApiStep({ onNext, onBack }: MarketplaceApiStepProps) {
  const [selectedMarketplaces, setSelectedMarketplaces] = useState<string[]>([])
  const [wbApiKey, setWbApiKey] = useState('')
  const [ozonApiKey, setOzonApiKey] = useState('')
  const [validationStates, setValidationStates] = useState<ApiKeyValidation>({})
  const [isSubmitting, setIsSubmitting] = useState(false)
  const [wbValidationData, setWbValidationData] = useState<ApiValidationData | null>(null)
  const [ozonValidationData, setOzonValidationData] = useState<ApiValidationData | null>(null)

  const [addMarketplaceApiKey] = useMutation(ADD_MARKETPLACE_API_KEY)

  const handleMarketplaceToggle = (marketplace: string) => {
    if (selectedMarketplaces.includes(marketplace)) {
      setSelectedMarketplaces((prev) => prev.filter((m) => m !== marketplace))
      if (marketplace === 'wildberries') setWbApiKey('')
      if (marketplace === 'ozon') setOzonApiKey('')
      // Сбрасываем состояние валидации
      setValidationStates((prev) => ({
        ...prev,
        [marketplace]: { isValid: null, isValidating: false },
      }))
    } else {
      setSelectedMarketplaces((prev) => [...prev, marketplace])
    }
  }

  const validateApiKey = async (marketplace: string, apiKey: string) => {
    if (!apiKey || !isValidApiKey(apiKey)) return

    setValidationStates((prev) => ({
      ...prev,
      [marketplace]: { isValid: null, isValidating: true },
    }))

    try {
      const { data } = await addMarketplaceApiKey({
        variables: {
          input: {
            marketplace: marketplace.toUpperCase(),
            apiKey,
            validateOnly: true,
          },
        },
      })

      setValidationStates((prev) => ({
        ...prev,
        [marketplace]: {
          isValid: data.addMarketplaceApiKey.success,
          isValidating: false,
          error: data.addMarketplaceApiKey.success ? undefined : data.addMarketplaceApiKey.message,
        },
      }))

      // Сохраняем данные валидации
      if (data.addMarketplaceApiKey.success && data.addMarketplaceApiKey.apiKey?.validationData) {
        const validationData = data.addMarketplaceApiKey.apiKey.validationData
        if (marketplace === 'wildberries') {
          setWbValidationData({
            sellerId: validationData.sellerId,
            sellerName: validationData.sellerName,
            tradeMark: validationData.tradeMark,
            isValid: true,
          })
        } else if (marketplace === 'ozon') {
          setOzonValidationData({
            sellerId: validationData.sellerId,
            sellerName: validationData.sellerName,
            tradeMark: validationData.tradeMark,
            isValid: true,
          })
        }
      }
    } catch {
      setValidationStates((prev) => ({
        ...prev,
        [marketplace]: {
          isValid: false,
          isValidating: false,
          error: 'Ошибка валидации API ключа',
        },
      }))
    }
  }

  const handleApiKeyChange = (marketplace: string, value: string) => {
    if (marketplace === 'wildberries') {
      setWbApiKey(value)
    } else if (marketplace === 'ozon') {
      setOzonApiKey(value)
    }

    // Сбрасываем состояние валидации при изменении
    setValidationStates((prev) => ({
      ...prev,
      [marketplace]: { isValid: null, isValidating: false },
    }))
  }

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault()

    if (selectedMarketplaces.length === 0) return

    setIsSubmitting(true)

    // Валидируем все выбранные маркетплейсы
    const validationPromises = []

    if (selectedMarketplaces.includes('wildberries') && isValidApiKey(wbApiKey)) {
      validationPromises.push(validateApiKey('wildberries', wbApiKey))
    }

    if (selectedMarketplaces.includes('ozon') && isValidApiKey(ozonApiKey)) {
      validationPromises.push(validateApiKey('ozon', ozonApiKey))
    }

    // Ждем завершения всех валидаций
    await Promise.all(validationPromises)

    // Небольшая задержка чтобы состояние обновилось
    await new Promise((resolve) => setTimeout(resolve, 100))

    // Проверяем результаты валидации
    let hasValidationErrors = false

    for (const marketplace of selectedMarketplaces) {
      const validation = validationStates[marketplace]
      if (!validation || validation.isValid !== true) {
        hasValidationErrors = true
        break
      }
    }

    if (!hasValidationErrors) {
      const apiData: {
        wbApiKey?: string
        wbApiValidation?: ApiValidationData
        ozonApiKey?: string
        ozonApiValidation?: ApiValidationData
      } = {}

      if (selectedMarketplaces.includes('wildberries') && isValidApiKey(wbApiKey)) {
        apiData.wbApiKey = wbApiKey
        if (wbValidationData) {
          apiData.wbApiValidation = wbValidationData
        }
      }

      if (selectedMarketplaces.includes('ozon') && isValidApiKey(ozonApiKey)) {
        apiData.ozonApiKey = ozonApiKey
        if (ozonValidationData) {
          apiData.ozonApiValidation = ozonValidationData
        }
      }

      onNext(apiData)
    }

    setIsSubmitting(false)
  }

  const isValidApiKey = (key: string) => {
    return key.length >= 10 && /^[a-zA-Z0-9-_.]+$/.test(key)
  }

  const isFormValid = () => {
    if (selectedMarketplaces.length === 0) return false

    for (const marketplace of selectedMarketplaces) {
      const apiKey = marketplace === 'wildberries' ? wbApiKey : ozonApiKey

      if (!isValidApiKey(apiKey)) {
        return false
      }
    }

    return true
  }

  const getValidationBadge = (marketplace: string) => {
    const validation = validationStates[marketplace]

    if (!validation || validation.isValid === null) return null

    if (validation.isValidating) {
      return (
        <Badge
          variant="outline"
          className="glass-secondary text-yellow-300 border-yellow-400/30 text-xs flex items-center gap-1"
        >
          Проверка...
        </Badge>
      )
    }

    if (validation.isValid) {
      return (
        <Badge
          variant="outline"
          className="glass-secondary text-green-300 border-green-400/30 text-xs flex items-center gap-1"
        >
          <Check className="h-3 w-3" />
          Валидный
        </Badge>
      )
    }

    return (
      <Badge
        variant="outline"
        className="glass-secondary text-red-300 border-red-400/30 text-xs flex items-center gap-1"
      >
        <X className="h-3 w-3" />
        Невалидный
      </Badge>
    )
  }

  const marketplaces = [
    {
      id: 'wildberries',
      name: 'Wildberries',
      badge: 'Популярный',
      badgeColor: 'purple',
      apiKey: wbApiKey,
      setApiKey: (value: string) => handleApiKeyChange('wildberries', value),
      placeholder: 'API ключ Wildberries',
    },
    {
      id: 'ozon',
      name: 'Ozon',
      badge: 'Быстро растёт',
      badgeColor: 'blue',
      apiKey: ozonApiKey,
      setApiKey: (value: string) => handleApiKeyChange('ozon', value),
      placeholder: 'API ключ Ozon',
    },
  ]

  return (
    <AuthLayout
      title="API ключи маркетплейсов"
      description="Выберите маркетплейсы и введите API ключи"
      currentStep={4}
      totalSteps={5}
      stepName="API ключи"
    >
      <div className="space-y-4">
        <div className="glass-card p-3">
          <div className="flex items-center space-x-2">
            <ShoppingCart className="h-4 w-4 text-white" />
            <div>
              <h4 className="text-white font-medium text-sm">Кабинет селлера</h4>
              <p className="text-white/70 text-xs">Управление продажами на маркетплейсах</p>
            </div>
          </div>
        </div>

        <form onSubmit={handleSubmit} className="space-y-4">
          <div className="space-y-3">
            {marketplaces.map((marketplace) => (
              <div key={marketplace.id} className="glass-card p-3">
                <div className="space-y-2">
                  <div className="flex items-center justify-between">
                    <div className="flex items-center space-x-2">
                      <Checkbox
                        id={marketplace.id}
                        checked={selectedMarketplaces.includes(marketplace.id)}
                        onCheckedChange={() => handleMarketplaceToggle(marketplace.id)}
                        className="border-white/30 data-[state=checked]:bg-purple-500"
                      />
                      <Label htmlFor={marketplace.id} className="text-white text-sm font-medium cursor-pointer">
                        {marketplace.name}
                      </Label>
                    </div>
                    <div className="flex items-center gap-2">
                      <Badge
                        variant="outline"
                        className={`glass-secondary border-${marketplace.badgeColor}-400/30 text-${
                          marketplace.badgeColor
                        }-300 text-xs`}
                      >
                        {marketplace.badge}
                      </Badge>
                      {selectedMarketplaces.includes(marketplace.id) && getValidationBadge(marketplace.id)}
                    </div>
                  </div>

                  {selectedMarketplaces.includes(marketplace.id) && (
                    <div className="pt-1">
                      <GlassInput
                        type="text"
                        placeholder={marketplace.placeholder}
                        value={marketplace.apiKey}
                        onChange={(e) => marketplace.setApiKey(e.target.value)}
                        className="h-10 text-sm"
                      />
                      <p className="text-white/60 text-xs mt-1">
                        {marketplace.id === 'wildberries'
                          ? 'Личный кабинет → Настройки → Доступ к API'
                          : 'Кабинет продавца → API → Генерация ключа'}
                      </p>
                      {validationStates[marketplace.id]?.error && (
                        <p className="text-red-400 text-xs mt-1">{validationStates[marketplace.id].error}</p>
                      )}
                    </div>
                  )}
                </div>
              </div>
            ))}
          </div>

          <div className="space-y-3">
            <Button
              type="submit"
              variant="glass"
              size="lg"
              className="w-full h-12"
              disabled={!isFormValid() || isSubmitting}
            >
              {isSubmitting ? 'Сохранение...' : 'Продолжить'}
            </Button>

            <Button type="button" variant="glass-secondary" onClick={onBack} className="w-full flex items-center gap-2">
              <ArrowLeft className="h-4 w-4" />
              Назад
            </Button>
          </div>
        </form>
      </div>
    </AuthLayout>
  )
}