/**
 * AlternativePaymentMethods Component
 * Display and select alternative payment methods (OXXO, SPEI, etc.)
 * Epic: OQI-005 Pagos y Stripe
 */

import React, { useState } from 'react';
import {
  Store,
  Building2,
  CreditCard,
  ChevronRight,
  Info,
  CheckCircle,
  Clock,
  AlertCircle,
  Loader2,
} from 'lucide-react';
import type { PaymentMethodType } from '../../types/payment.types';

export interface AlternativePaymentMethod {
  id: PaymentMethodType;
  name: string;
  description: string;
  icon: React.ReactNode;
  processingTime: string;
  available: boolean;
  minAmount?: number;
  maxAmount?: number;
  fees?: string;
  instructions?: string[];
  regions?: string[];
}

const ALTERNATIVE_METHODS: AlternativePaymentMethod[] = [
  {
    id: 'oxxo',
    name: 'OXXO Pay',
    description: 'Pay with cash at any OXXO convenience store',
    icon: <Store className="w-6 h-6" />,
    processingTime: '1-3 business days',
    available: true,
    minAmount: 10,
    maxAmount: 10000,
    fees: 'No additional fees',
    instructions: [
      'Complete checkout to receive a payment voucher',
      'Visit any OXXO store and show the voucher',
      'Pay in cash at the register',
      'Your payment will be confirmed within 1-3 days',
    ],
    regions: ['Mexico'],
  },
  {
    id: 'spei',
    name: 'SPEI Transfer',
    description: 'Instant bank transfer via SPEI (Mexico)',
    icon: <Building2 className="w-6 h-6" />,
    processingTime: 'Instant - 24 hours',
    available: true,
    minAmount: 1,
    maxAmount: 500000,
    fees: 'Bank fees may apply',
    instructions: [
      'Complete checkout to receive CLABE and reference number',
      'Log into your bank app or website',
      'Make a SPEI transfer to the provided CLABE',
      'Include the reference number in your transfer',
    ],
    regions: ['Mexico'],
  },
  {
    id: 'card',
    name: 'Credit/Debit Card',
    description: 'Pay with Visa, Mastercard, or Amex',
    icon: <CreditCard className="w-6 h-6" />,
    processingTime: 'Instant',
    available: true,
    fees: 'No additional fees',
    instructions: ['Enter your card details securely'],
    regions: ['Worldwide'],
  },
];

interface AlternativePaymentMethodsProps {
  selectedMethod: PaymentMethodType | null;
  onSelectMethod: (method: PaymentMethodType) => void;
  onContinue: () => void;
  amount?: number;
  currency?: string;
  isLoading?: boolean;
  showCardOption?: boolean;
  region?: string;
}

const AlternativePaymentMethods: React.FC<AlternativePaymentMethodsProps> = ({
  selectedMethod,
  onSelectMethod,
  onContinue,
  amount = 0,
  currency = 'MXN',
  isLoading = false,
  showCardOption = true,
  region = 'Mexico',
}) => {
  const [expandedMethod, setExpandedMethod] = useState<PaymentMethodType | null>(null);

  const formatCurrency = (value: number) => {
    return new Intl.NumberFormat('es-MX', {
      style: 'currency',
      currency,
    }).format(value);
  };

  const availableMethods = ALTERNATIVE_METHODS.filter((method) => {
    if (!showCardOption && method.id === 'card') return false;
    if (method.regions && !method.regions.includes(region) && !method.regions.includes('Worldwide')) {
      return false;
    }
    if (method.minAmount && amount < method.minAmount) return false;
    if (method.maxAmount && amount > method.maxAmount) return false;
    return method.available;
  });

  const toggleExpand = (methodId: PaymentMethodType) => {
    setExpandedMethod(expandedMethod === methodId ? null : methodId);
  };

  const getMethodStatusColor = (method: AlternativePaymentMethod) => {
    if (!method.available) return 'text-gray-500';
    if (selectedMethod === method.id) return 'text-blue-400';
    return 'text-gray-400';
  };

  return (
    <div className="space-y-4">
      {/* Header */}
      <div className="flex items-center justify-between">
        <h3 className="text-lg font-semibold text-white">Select Payment Method</h3>
        {amount > 0 && (
          <span className="text-gray-400">
            Total: <span className="text-white font-medium">{formatCurrency(amount)}</span>
          </span>
        )}
      </div>

      {/* Payment Methods List */}
      <div className="space-y-3">
        {availableMethods.map((method) => {
          const isSelected = selectedMethod === method.id;
          const isExpanded = expandedMethod === method.id;

          return (
            <div
              key={method.id}
              className={`rounded-xl border transition-all ${
                isSelected
                  ? 'border-blue-500 bg-blue-900/20'
                  : 'border-gray-700 bg-gray-800/50 hover:border-gray-600'
              }`}
            >
              {/* Method Header */}
              <button
                onClick={() => onSelectMethod(method.id)}
                className="w-full flex items-center justify-between p-4"
              >
                <div className="flex items-center gap-4">
                  <div
                    className={`p-3 rounded-lg ${
                      isSelected ? 'bg-blue-500/20' : 'bg-gray-900'
                    } ${getMethodStatusColor(method)}`}
                  >
                    {method.icon}
                  </div>
                  <div className="text-left">
                    <div className="flex items-center gap-2">
                      <span className="text-white font-medium">{method.name}</span>
                      {method.regions && method.regions[0] !== 'Worldwide' && (
                        <span className="px-2 py-0.5 bg-gray-700 text-gray-400 text-xs rounded">
                          {method.regions[0]}
                        </span>
                      )}
                    </div>
                    <p className="text-gray-400 text-sm">{method.description}</p>
                  </div>
                </div>
                <div className="flex items-center gap-3">
                  {isSelected && (
                    <CheckCircle className="w-5 h-5 text-blue-400" />
                  )}
                  <button
                    onClick={(e) => {
                      e.stopPropagation();
                      toggleExpand(method.id);
                    }}
                    className="p-1 text-gray-500 hover:text-white transition-colors"
                  >
                    <Info className="w-4 h-4" />
                  </button>
                </div>
              </button>

              {/* Expanded Details */}
              {isExpanded && (
                <div className="px-4 pb-4 border-t border-gray-700/50 mt-2 pt-3">
                  <div className="grid grid-cols-2 gap-4 text-sm">
                    <div>
                      <span className="text-gray-500 block">Processing Time</span>
                      <span className="text-white flex items-center gap-1">
                        <Clock className="w-4 h-4 text-gray-500" />
                        {method.processingTime}
                      </span>
                    </div>
                    {method.fees && (
                      <div>
                        <span className="text-gray-500 block">Fees</span>
                        <span className="text-white">{method.fees}</span>
                      </div>
                    )}
                    {method.minAmount && (
                      <div>
                        <span className="text-gray-500 block">Min Amount</span>
                        <span className="text-white">{formatCurrency(method.minAmount)}</span>
                      </div>
                    )}
                    {method.maxAmount && (
                      <div>
                        <span className="text-gray-500 block">Max Amount</span>
                        <span className="text-white">{formatCurrency(method.maxAmount)}</span>
                      </div>
                    )}
                  </div>

                  {method.instructions && method.instructions.length > 0 && (
                    <div className="mt-4">
                      <span className="text-gray-500 text-sm block mb-2">How it works:</span>
                      <ol className="space-y-1.5">
                        {method.instructions.map((instruction, index) => (
                          <li key={index} className="flex items-start gap-2 text-sm text-gray-400">
                            <span className="flex-shrink-0 w-5 h-5 rounded-full bg-gray-700 text-gray-300 flex items-center justify-center text-xs">
                              {index + 1}
                            </span>
                            {instruction}
                          </li>
                        ))}
                      </ol>
                    </div>
                  )}
                </div>
              )}
            </div>
          );
        })}
      </div>

      {/* Amount Limits Warning */}
      {amount > 0 && (
        <div className="flex items-start gap-2 p-3 bg-gray-800/50 rounded-lg">
          <AlertCircle className="w-4 h-4 text-amber-400 flex-shrink-0 mt-0.5" />
          <p className="text-gray-400 text-sm">
            Some payment methods have minimum and maximum amount limits.
            {selectedMethod === 'oxxo' && amount > 10000 && (
              <span className="text-amber-400 block mt-1">
                OXXO Pay has a maximum limit of $10,000 MXN per transaction.
              </span>
            )}
          </p>
        </div>
      )}

      {/* Continue Button */}
      {selectedMethod && (
        <button
          onClick={onContinue}
          disabled={isLoading}
          className="w-full flex items-center justify-center gap-2 py-3 bg-blue-600 hover:bg-blue-500 text-white rounded-lg font-medium transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
        >
          {isLoading ? (
            <>
              <Loader2 className="w-5 h-5 animate-spin" />
              Processing...
            </>
          ) : (
            <>
              Continue with {ALTERNATIVE_METHODS.find((m) => m.id === selectedMethod)?.name}
              <ChevronRight className="w-5 h-5" />
            </>
          )}
        </button>
      )}

      {/* Security Note */}
      <div className="flex items-center justify-center gap-2 text-gray-500 text-xs">
        <CheckCircle className="w-3 h-3 text-emerald-500" />
        All payments are processed securely via Stripe
      </div>
    </div>
  );
};

export default AlternativePaymentMethods;