import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import 'package:cached_network_image/cached_network_image.dart';
import '../models/review.dart';
import '../services/woocommerce_service.dart';
import '../widgets/loading_widget.dart';
import '../utils/error_handler.dart';

class ReviewsWidget extends StatefulWidget {
  final int productId;

  const ReviewsWidget({
    super.key,
    required this.productId,
  });

  @override
  State<ReviewsWidget> createState() => _ReviewsWidgetState();
}

class _ReviewsWidgetState extends State<ReviewsWidget> {
  final WooCommerceService _wooCommerceService = WooCommerceService();
  List<Review> _reviews = [];
  ProductRating? _rating;
  bool _isLoading = true;
  String? _error;

  @override
  void initState() {
    super.initState();
    _loadReviews();
  }

  Future<void> _loadReviews() async {
    setState(() {
      _isLoading = true;
      _error = null;
    });

    try {
      final reviews = await _wooCommerceService.getProductReviews(widget.productId);
      final rating = await _wooCommerceService.getProductRating(widget.productId);

      setState(() {
        _reviews = reviews;
        _rating = rating;
        _isLoading = false;
      });
    } catch (e) {
      setState(() {
        _error = e.toString();
        _isLoading = false;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    if (_isLoading) {
      return const LoadingWidget();
    }

    if (_error != null) {
      return Center(
        child: Column(
          children: [
            Text('Fehler beim Laden der Bewertungen'),
            ElevatedButton(
              onPressed: _loadReviews,
              child: const Text('Erneut versuchen'),
            ),
          ],
        ),
      );
    }

    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        if (_rating != null) _buildRatingSummary(_rating!),
        const SizedBox(height: 16),
        Text(
          'Bewertungen (${_reviews.length})',
          style: Theme.of(context).textTheme.titleLarge?.copyWith(
                fontWeight: FontWeight.bold,
              ),
        ),
        const SizedBox(height: 12),
        if (_reviews.isEmpty)
          const Padding(
            padding: EdgeInsets.all(16.0),
            child: Text('Noch keine Bewertungen'),
          )
        else
          ..._reviews.map((review) => _buildReviewCard(review)),
      ],
    );
  }

  Widget _buildRatingSummary(ProductRating rating) {
    return Container(
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: Colors.grey[100],
        borderRadius: BorderRadius.circular(12),
      ),
      child: Row(
        children: [
          Column(
            children: [
              Text(
                rating.averageRating.toStringAsFixed(1),
                style: Theme.of(context).textTheme.headlineMedium?.copyWith(
                      fontWeight: FontWeight.bold,
                      color: const Color(0xFF8B6F47),
                    ),
              ),
              _buildStars(rating.averageRating),
              Text(
                '${rating.ratingCount} Bewertungen',
                style: Theme.of(context).textTheme.bodySmall,
              ),
            ],
          ),
        ],
      ),
    );
  }

  Widget _buildStars(double rating) {
    return Row(
      mainAxisSize: MainAxisSize.min,
      children: List.generate(5, (index) {
        return Icon(
          index < rating.floor()
              ? Icons.star
              : index < rating
                  ? Icons.star_half
                  : Icons.star_border,
          color: Colors.amber,
          size: 20,
        );
      }),
    );
  }

  Widget _buildReviewCard(Review review) {
    final dateFormat = DateFormat('dd.MM.yyyy');
    
    return Card(
      margin: const EdgeInsets.only(bottom: 12),
      child: Padding(
        padding: const EdgeInsets.all(12),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Row(
              children: [
                if (review.reviewerAvatarUrl != null)
                  CircleAvatar(
                    radius: 20,
                    backgroundImage: CachedNetworkImageProvider(review.reviewerAvatarUrl!),
                  )
                else
                  CircleAvatar(
                    radius: 20,
                    child: Text(review.reviewer[0].toUpperCase()),
                  ),
                const SizedBox(width: 12),
                Expanded(
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text(
                        review.reviewer,
                        style: Theme.of(context).textTheme.titleSmall?.copyWith(
                              fontWeight: FontWeight.bold,
                            ),
                      ),
                      Text(
                        dateFormat.format(review.dateCreated),
                        style: Theme.of(context).textTheme.bodySmall?.copyWith(
                              color: Colors.grey[600],
                            ),
                      ),
                    ],
                  ),
                ),
                _buildStars(review.rating.toDouble()),
              ],
            ),
            const SizedBox(height: 8),
            Text(
              review.review,
              style: Theme.of(context).textTheme.bodyMedium,
            ),
            if (review.verified)
              Padding(
                padding: const EdgeInsets.only(top: 8),
                child: Row(
                  children: [
                    Icon(Icons.verified, size: 16, color: Colors.green),
                    const SizedBox(width: 4),
                    Text(
                      'Verifizierter Kauf',
                      style: Theme.of(context).textTheme.bodySmall?.copyWith(
                            color: Colors.green,
                          ),
                    ),
                  ],
                ),
              ),
          ],
        ),
      ),
    );
  }
}