'use client';

import { useState } from 'react';
import { motion, AnimatePresence } from 'framer-motion';
import { FaTimes, FaCreditCard, FaLock } from 'react-icons/fa';
import { Album } from '@/lib/types';
import { formatPrice } from '@/lib/utils';

interface PaymentModalProps {
  album: Album | null;
  onClose: () => void;
  onSuccess: (albumId: string, transactionId: string) => void;
}

export default function PaymentModal({ album, onClose, onSuccess }: PaymentModalProps) {
  const [cardNumber, setCardNumber] = useState('');
  const [cardName, setCardName] = useState('');
  const [phoneNumber, setPhoneNumber] = useState('');
  const [email, setEmail] = useState('');
  const [txReceipt, setTxReceipt] = useState('');
  const [processing, setProcessing] = useState(false);
  const [error, setError] = useState('');

  const formatCardNumber = (value: string) => {
    const numbers = value.replace(/\s/g, '');
    const groups = numbers.match(/.{1,4}/g);
    return groups ? groups.join(' ') : numbers;
  };

  const formatPhoneNumber = (value: string) => {
    const numbers = value.replace(/\D/g, '');
    if (numbers.length <= 3) return numbers;
    if (numbers.length <= 6) return `(${numbers.slice(0, 3)}) ${numbers.slice(3)}`;
    return `(${numbers.slice(0, 3)}) ${numbers.slice(3, 6)}-${numbers.slice(6, 10)}`;
  };

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

    // Basic validation
    if (cardNumber.replace(/\s/g, '').length !== 16) {
      setError('Invalid card number');
      return;
    }

    if (!cardName.trim()) {
      setError('Name is required');
      return;
    }

    if (phoneNumber.replace(/\D/g, '').length < 10) {
      setError('Invalid phone number');
      return;
    }

    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    if (!emailRegex.test(email)) {
      setError('Invalid email address');
      return;
    }

    if (!txReceipt.trim()) {
      setError('Transaction receipt is required');
      return;
    }

    if (!album) return;

    setProcessing(true);

    try {
      // Use the provided transaction receipt as the ID
      const transactionId = txReceipt.trim() || 'TXN-' + Date.now() + '-' + Math.random().toString(36).substr(2, 9).toUpperCase();

      // Create purchase via API
      const response = await fetch('/api/purchases', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          albumId: album.id,
          transactionId,
          customerName: cardName.trim(),
          email: email.trim(),
          phoneNumber: phoneNumber,
          txReceipt: txReceipt.trim(),
          purchaseDate: new Date().getTime(),
        }),
      });

      if (!response.ok) {
        const data = await response.json();
        throw new Error(data.error || 'Failed to process purchase');
      }

      setProcessing(false);
      onSuccess(album.id, transactionId);
    } catch (err: any) {
      setProcessing(false);
      setError(err.message || 'Failed to process payment');
    }
  };

  if (!album) return null;

  return (
    <AnimatePresence>
      {album && (
        <motion.div
          initial={{ opacity: 0 }}
          animate={{ opacity: 1 }}
          exit={{ opacity: 0 }}
          className="fixed inset-0 bg-black/80 backdrop-blur-sm z-50 flex items-center justify-center p-4"
          onClick={onClose}
        >
          <motion.div
            initial={{ scale: 0.9, opacity: 0 }}
            animate={{ scale: 1, opacity: 1 }}
            exit={{ scale: 0.9, opacity: 0 }}
            onClick={(e) => e.stopPropagation()}
            className="glass-effect rounded-2xl max-w-md w-full p-8 border-2 border-accent-cyan/30"
          >
            {/* Header */}
            <div className="flex items-center justify-between mb-6">
              <h2 className="text-2xl font-bold text-transparent bg-clip-text bg-gradient-to-r from-accent-cyan to-accent-orange">
                Purchase Album
              </h2>
              <button
                onClick={onClose}
                className="p-2 hover:bg-white/10 rounded-full transition-colors"
                aria-label="Close"
              >
                <FaTimes className="text-xl text-gray-400" />
              </button>
            </div>

            {/* Album Info */}
            <div className="mb-6 p-4 bg-white/5 rounded-lg">
              <h3 className="font-semibold text-white">{album.title}</h3>
              <p className="text-sm text-gray-400">{album.songs.length} tracks • {album.genre}</p>
              <p className="text-2xl font-bold text-accent-orange mt-2">{formatPrice(album.price)}</p>
            </div>

            {/* Payment Form */}
            <form onSubmit={handleSubmit} className="space-y-4">
              {/* Card Number */}
              <div>
                <label className="block text-sm font-medium text-gray-300 mb-2">
                  <FaCreditCard className="inline mr-2" />
                  Card Number
                </label>
                <input
                  type="text"
                  value={cardNumber}
                  onChange={(e) => {
                    const formatted = formatCardNumber(e.target.value.replace(/\D/g, '').slice(0, 16));
                    setCardNumber(formatted);
                  }}
                  placeholder="1234 5678 9012 3456"
                  className="w-full px-4 py-3 bg-white/5 border border-white/10 rounded-lg focus:border-accent-cyan focus:outline-none focus:ring-2 focus:ring-accent-cyan/50 text-white placeholder-gray-500"
                  required
                />
              </div>

              {/* Card Name */}
              <div>
                <label className="block text-sm font-medium text-gray-300 mb-2">
                  Full Name
                </label>
                <input
                  type="text"
                  value={cardName}
                  onChange={(e) => setCardName(e.target.value)}
                  placeholder="John Doe"
                  className="w-full px-4 py-3 bg-white/5 border border-white/10 rounded-lg focus:border-accent-cyan focus:outline-none focus:ring-2 focus:ring-accent-cyan/50 text-white placeholder-gray-500"
                  required
                />
              </div>

              {/* Phone Number */}
              <div>
                <label className="block text-sm font-medium text-gray-300 mb-2">
                  Phone Number
                </label>
                <input
                  type="tel"
                  value={phoneNumber}
                  onChange={(e) => {
                    const formatted = formatPhoneNumber(e.target.value);
                    setPhoneNumber(formatted);
                  }}
                  placeholder="(123) 456-7890"
                  className="w-full px-4 py-3 bg-white/5 border border-white/10 rounded-lg focus:border-accent-cyan focus:outline-none focus:ring-2 focus:ring-accent-cyan/50 text-white placeholder-gray-500"
                  required
                />
              </div>

              {/* Email */}
              <div>
                <label className="block text-sm font-medium text-gray-300 mb-2">
                  Email Address
                </label>
                <input
                  type="email"
                  value={email}
                  onChange={(e) => setEmail(e.target.value)}
                  placeholder="john@example.com"
                  className="w-full px-4 py-3 bg-white/5 border border-white/10 rounded-lg focus:border-accent-cyan focus:outline-none focus:ring-2 focus:ring-accent-cyan/50 text-white placeholder-gray-500"
                  required
                />
              </div>

              {/* Transaction Receipt */}
              <div>
                <label className="block text-sm font-medium text-gray-300 mb-2">
                  Transaction Receipt / ID
                </label>
                <input
                  type="text"
                  value={txReceipt}
                  onChange={(e) => setTxReceipt(e.target.value)}
                  placeholder="TXN-123456789"
                  className="w-full px-4 py-3 bg-white/5 border border-white/10 rounded-lg focus:border-accent-cyan focus:outline-none focus:ring-2 focus:ring-accent-cyan/50 text-white placeholder-gray-500"
                  required
                />
              </div>

              {/* Error Message */}
              {error && (
                <motion.div
                  initial={{ opacity: 0, y: -10 }}
                  animate={{ opacity: 1, y: 0 }}
                  className="p-3 bg-red-500/20 border border-red-500/50 rounded-lg text-red-300 text-sm"
                >
                  {error}
                </motion.div>
              )}

              {/* Submit Button */}
              <button
                type="submit"
                disabled={processing}
                className="w-full py-4 bg-gradient-to-r from-accent-orange to-accent-orange/80 hover:from-accent-orange/90 hover:to-accent-orange/70 rounded-lg font-semibold text-white transition-all glow-orange disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
              >
                {processing ? (
                  <>
                    <div className="animate-spin rounded-full h-5 w-5 border-b-2 border-white"></div>
                    Processing...
                  </>
                ) : (
                  <>
                    <FaLock />
                    Complete Purchase - {formatPrice(album.price)}
                  </>
                )}
              </button>

              {/* Security Notice */}
              <p className="text-xs text-gray-500 text-center mt-4">
                <FaLock className="inline mr-1" />
                This is a demo payment form. No real charges will be made.
              </p>
            </form>
          </motion.div>
        </motion.div>
      )}
    </AnimatePresence>
  );
}