import React, { useState } from 'react'
import { FaPlus, FaMinus } from 'react-icons/fa'
import { BillingCycle, Product, ProductDto } from '@/proxy/order/models'
import { CartState } from '@/utils/cartUtils'
import { useLocalization } from '@/utils/hooks/useLocalization'

interface ProductCardProps {
  product: ProductDto
  globalBillingCycle: BillingCycle
  globalPeriod: number
  addItem: (product: ProductDto, quantity: number, billingCycle: BillingCycle) => void
  cartState: CartState
}

export const ProductCard: React.FC<ProductCardProps> = ({
  product,
  globalBillingCycle,
  globalPeriod,
  addItem,
  cartState,
}) => {
  const [quantity, setQuantity] = useState(1)
  const { translate } = useLocalization()

  // Direct check with current cart state
  const isInCart = cartState.items.some(
    (item) => item.product.id === product.id && item.billingCycle === globalBillingCycle,
  )

  const formatPrice = (price: number) => {
    return new Intl.NumberFormat('tr-TR', {
      style: 'currency',
      currency: 'TRY',
      minimumFractionDigits: 0,
    }).format(price)
  }

  const getCurrentPrice = () => {
    return globalBillingCycle === 'monthly' ? product.monthlyPrice! : product.yearlyPrice!
  }

  const getTotalPrice = () => {
    return getCurrentPrice() * quantity * globalPeriod
  }

  const handleAddToCart = () => {
    // Non-quantity products should not be added if already in cart
    if (!product.isQuantityBased && isInCart) {
      return
    }

    // For non-quantity products, always use quantity 1
    const quantityToAdd = !product.isQuantityBased ? 1 : quantity
    addItem(product, quantityToAdd, globalBillingCycle)
    setQuantity(1)
  }

  const getUnitText = () => {
    switch (product.unit) {
      case 'monthly':
        return globalBillingCycle === 'monthly'
          ? translate('::Public.Products.MonthPeriod')
          : translate('::Public.Products.YearPeriod')
      case 'yearly':
        return translate('::Public.Products.YearPeriod')
      default:
        return ''
    }
  }

  const getPeriodText = () => {
    const periodText =
      globalBillingCycle === 'monthly'
        ? translate('::Public.products.billingcycle.month')
        : translate('::Public.products.billingcycle.year')
    return globalPeriod > 1 ? ` (${globalPeriod} ${periodText})` : ''
  }

  // Check if product has valid price for current billing cycle
  const hasValidPrice = () => {
    if (globalBillingCycle === 'monthly' && !product.monthlyPrice) return false
    if (globalBillingCycle === 'yearly' && !product.yearlyPrice) return false
    return true
  }

  // If product doesn't have valid price, don't render it at all
  if (!hasValidPrice()) {
    return null
  }

  return (
    <div className="bg-white rounded-xl shadow-sm border border-gray-200 overflow-hidden hover:shadow-lg transition-all duration-300 group flex flex-col h-full">
      {product.imageUrl && (
        <div className="aspect-video overflow-hidden">
          <img
            src={product.imageUrl}
            alt={product.name}
            className="w-full h-full object-cover group-hover:scale-105 transition-transform duration-300"
          />
        </div>
      )}

      <div className="p-6 flex flex-col flex-1">
        <div className="mb-2">
          <span className="inline-block px-3 py-1 bg-blue-100 text-blue-800 text-sm font-medium rounded-full">
            {translate('::' + product.category)}
          </span>
        </div>

        <h3 className="text-lg font-semibold text-gray-900 mb-2 line-clamp-2">{translate('::' + product.name)}</h3>

        <p className="text-gray-600 text-sm mb-4 line-clamp-3">{translate('::' + product.description)}</p>

        {/* Quantity and Yearly Savings above price */}
        <div className="mb-4 space-y-3">
          {product.isQuantityBased && (
            <div className="flex items-center space-x-3">
              <span className="text-sm font-medium text-gray-700">
                {translate('::Public.products.quantity')}
              </span>
              <div className="flex items-center space-x-2">
                <button
                  onClick={() => setQuantity(Math.max(1, quantity - 1))}
                  className="p-1 rounded-md border border-gray-300 hover:bg-gray-50 transition-colors"
                >
                  <FaMinus className="w-4 h-4" />
                </button>
                <span className="w-12 text-center font-medium">{quantity}</span>
                <button
                  onClick={() => setQuantity(quantity + 1)}
                  className="p-1 rounded-md border border-gray-300 hover:bg-gray-50 transition-colors"
                >
                  <FaPlus className="w-4 h-4" />
                </button>
              </div>
            </div>
          )}

          {globalBillingCycle === 'yearly' && product.monthlyPrice && product.yearlyPrice && (
            <div className="text-sm text-emerald-600 font-medium">
              {translate('::Public.products.savings.yearly', {
                percent: Math.round((1 - product.yearlyPrice / (product.monthlyPrice * 12)) * 100),
              })}
            </div>
          )}
        </div>

        {/* Bottom section with consistent height */}
        <div className="mt-auto">
          <div className="mb-4">
            <div className="text-2xl font-bold text-gray-900">
              {formatPrice(getCurrentPrice())}
              <span className="text-sm font-normal text-gray-500 ml-1">{getUnitText()}</span>
            </div>
            {globalPeriod > 1 && (
              <div className="text-lg font-semibold text-blue-600 mt-1">
                {translate('::Public.payment.summary.total')} {formatPrice(getTotalPrice())}
                <span className="text-sm font-normal text-gray-500 ml-1">{getPeriodText()}</span>
              </div>
            )}
          </div>

          {(() => {
            const isNonQuantityProduct = !product.isQuantityBased
            const isDisabled = isNonQuantityProduct && isInCart

            return (
              <button
                onClick={handleAddToCart}
                disabled={isDisabled}
                className={`w-full font-medium py-3 px-4 rounded-lg transition-colors duration-200 transform ${
                  isDisabled
                    ? 'bg-gray-400 text-gray-700 cursor-not-allowed'
                    : 'bg-blue-600 hover:bg-blue-700 text-white hover:scale-[1.02] active:scale-[0.98]'
                }`}
              >
                {isDisabled ? translate('::Public.products.inCart') : translate('::Public.products.addToCart')}
              </button>
            )
          })()}
        </div>
      </div>
    </div>
  )
}