import { ErrorCode, useIAP } from 'expo-iap'
import { useEffect } from 'react'
import { Platform } from 'react-native'

import { Toast } from '@/@share/components'

type UseIOSPurchaseOptions = {
  skus: string[]
  onPurchaseSuccess?: (purchase: any) => Promise<void>
  onPurchaseError?: (error: any) => void
  onProductsFetched?: (products: any[]) => void
}

/**
 * iOS 专用的 IAP Hook
 * 在非 iOS 平台返回空实现，避免不必要的初始化
 */
export function useIOSPurchase(options: UseIOSPurchaseOptions) {
  const { skus, onPurchaseSuccess, onPurchaseError, onProductsFetched } = options

  const isIOS = Platform.OS === 'ios'

  // iOS 平台使用真实的 IAP
  const { connected, products, fetchProducts, requestPurchase, finishTransaction } = useIAP({
    onPurchaseSuccess: async (purchase) => {
      if (!isIOS) return

      console.log('✅ Purchase successful:', purchase)

      // 执行自定义成功回调
      if (onPurchaseSuccess) {
        await onPurchaseSuccess(purchase)
      }

      // 完成交易（消耗型商品）
      await finishTransaction({ purchase, isConsumable: true })
    },
    onPurchaseError: (error) => {
      if (!isIOS) return

      // 用户取消不显示错误
      if (error.code !== ErrorCode.UserCancelled) {
        console.error('❌ Purchase failed:', error)

        if (onPurchaseError) {
          onPurchaseError(error)
        } else {
          Toast.show({ title: '购买失败，请稍后重试' })
        }
      }
    },
    onError: (error) => {
      console.log('❌ IAP Error:', error)
    },
  })

  // 连接后自动获取商品
  useEffect(() => {
    if (!isIOS || !connected) return

    console.log('🔗 IAP connected, fetching products...', connected)
    console.log('📦 SKUs:', skus)

    fetchProducts({ skus, type: 'in-app' })
      .then((result) => {
        if (!result?.products?.length) {
          console.warn('⚠️ No products returned. Check App Store Connect configuration.')
        }

        if (onProductsFetched && result?.products) {
          onProductsFetched(result.products)
        }
      })
      .catch((error) => {
        console.error('❌ Failed to fetch products:', error)
        Toast.show({ title: '获取商品信息失败' })
      })
  }, [isIOS, connected, skus])

  // 非 iOS 平台返回空实现
  if (!isIOS) {
    return {
      connected: false,
      products: [],
      requestPurchase: async () => {
        console.warn('IAP is only supported on iOS')
      },
    }
  }

  return {
    connected,
    products,
    requestPurchase: async (productId: string) => {
      if (!connected) {
        Toast.show({ title: 'App Store 未连接' })
        return
      }

      if (!products?.length) {
        Toast.show({ title: '商品信息加载中，请稍后' })
        return
      }

      await requestPurchase({
        request: {
          apple: { sku: productId },
        },
        type: 'in-app',
      })
    },
  }
}