import React, { useState, useEffect } from 'react';
import { loadStripe, StripeElementsOptions } from '@stripe/stripe-js';
import { Elements } from '@stripe/react-stripe-js';
import StripePaymentForm from './StripePaymentForm';
import { createStripePaymentIntent, confirmStripePayment } from '../services/paymentService';
import { Loader2, AlertCircle } from 'lucide-react';

interface StripePaymentWrapperProps {
  bookingId: number;
  amount: number;
  currency?: string;
  onSuccess: () => void;
  onError?: (error: string) => void;
}

const StripePaymentWrapper: React.FC<StripePaymentWrapperProps> = ({
  bookingId,
  amount,
  currency = 'usd',
  onSuccess,
  onError,
}) => {
  const [stripePromise, setStripePromise] = useState<Promise<any> | null>(null);
  const [clientSecret, setClientSecret] = useState<string | null>(null);
  const [, setPublishableKey] = useState<string | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  const [paymentCompleted, setPaymentCompleted] = useState(false);

  
  useEffect(() => {
    
    if (paymentCompleted) {
      return;
    }

    
    const initializeStripe = async () => {
      try {
        setLoading(true);
        setError(null);

        const response = await createStripePaymentIntent(
          bookingId,
          amount,
          currency
        );

        if (response.success && response.data) {
          const { publishable_key, client_secret } = response.data;
          
          console.log('Payment intent response:', { publishable_key: publishable_key ? 'present' : 'missing', client_secret: client_secret ? 'present' : 'missing' });
          
          if (!client_secret) {
            throw new Error('Client secret not received from server');
          }
          
          if (!publishable_key) {
            throw new Error('Publishable key not configured. Please configure Stripe settings in Admin Panel.');
          }
          
          setPublishableKey(publishable_key);
          setClientSecret(client_secret);

          
          
          const stripePromise = loadStripe(publishable_key);
          setStripePromise(stripePromise);
          
          
          const stripe = await stripePromise;
          if (!stripe) {
            throw new Error('Failed to load Stripe');
          }
        } else {
          throw new Error(response.message || 'Failed to initialize payment');
        }
      } catch (err: any) {
        console.error('Error initializing Stripe:', err);
        const errorMessage = err.response?.data?.message || err.message || 'Failed to initialize payment';
        setError(errorMessage);
        if (onError) {
          onError(errorMessage);
        }
      } finally {
        setLoading(false);
      }
    };

    initializeStripe();
  }, [bookingId, amount, currency, onError, paymentCompleted]);

  
  useEffect(() => {
    if (clientSecret && stripePromise) {
      console.log('Stripe initialized successfully', { hasClientSecret: !!clientSecret, hasStripePromise: !!stripePromise });
    } else {
      console.log('Stripe not ready', { hasClientSecret: !!clientSecret, hasStripePromise: !!stripePromise, error });
    }
  }, [clientSecret, stripePromise, error]);

  const handlePaymentSuccess = async (paymentIntentId: string) => {
    try {
      
      setPaymentCompleted(true);
      
      const response = await confirmStripePayment(paymentIntentId, bookingId);
      
      if (response.success) {
        onSuccess();
      } else {
        
        setPaymentCompleted(false);
        throw new Error(response.message || 'Payment confirmation failed');
      }
    } catch (err: any) {
      console.error('Error confirming payment:', err);
      
      setPaymentCompleted(false);
      const errorMessage = err.response?.data?.message || err.message || 'Payment confirmation failed';
      setError(errorMessage);
      if (onError) {
        onError(errorMessage);
      }
    }
  };

  const handlePaymentError = (errorMessage: string) => {
    setError(errorMessage);
    if (onError) {
      onError(errorMessage);
    }
  };

  
  if (paymentCompleted) {
    return null; 
  }

  if (loading) {
    return (
      <div className="flex items-center justify-center p-8">
        <Loader2 className="w-8 h-8 animate-spin text-indigo-600" />
        <span className="ml-2 text-gray-600">Initializing payment...</span>
      </div>
    );
  }

  if (error) {
    return (
      <div className="bg-red-50 border border-red-200 rounded-lg p-6">
        <div className="flex items-start gap-3">
          <AlertCircle className="w-5 h-5 text-red-600 mt-0.5" />
          <div>
            <h3 className="text-lg font-semibold text-red-900 mb-1">
              Payment Initialization Failed
            </h3>
            <p className="text-sm text-red-800">
              {error || 'Unable to initialize payment. Please try again.'}
            </p>
          </div>
        </div>
      </div>
    );
  }

  if (!clientSecret || !stripePromise) {
    return (
      <div className="flex items-center justify-center p-8">
        <Loader2 className="w-8 h-8 animate-spin text-indigo-600" />
        <span className="ml-2 text-gray-600">Loading payment form...</span>
      </div>
    );
  }

  const options: StripeElementsOptions = {
    clientSecret,
    appearance: {
      theme: 'stripe',
    },
  };

  return (
    <Elements stripe={stripePromise} options={options}>
      <StripePaymentForm
        clientSecret={clientSecret}
        amount={amount}
        onSuccess={handlePaymentSuccess}
        onError={handlePaymentError}
      />
    </Elements>
  );
};

export default StripePaymentWrapper;