// lib/features/reviews/widgets/review_card.dart
import 'package:flutter/material.dart';
import 'package:cached_network_image/cached_network_image.dart';
import '../models/review_models.dart';
import 'star_display.dart';

class ReviewCard extends StatefulWidget {
  final ReviewModel review;
  final String? currentUsername;
  final Future<int> Function(int reviewId) onHelpful;
  final Future<void> Function(int reviewId) onFlag;

  const ReviewCard({
    Key? key,
    required this.review,
    this.currentUsername,
    required this.onHelpful,
    required this.onFlag,
  }) : super(key: key);

  @override
  State<ReviewCard> createState() => _ReviewCardState();
}

class _ReviewCardState extends State<ReviewCard> {
  late ReviewModel _review;
  bool _expanded = false;

  @override
  void initState() {
    super.initState();
    _review = widget.review;
  }

  @override
  void didUpdateWidget(covariant ReviewCard oldWidget) {
    super.didUpdateWidget(oldWidget);
    if (oldWidget.review.id != widget.review.id) _review = widget.review;
  }

  bool get _isOwnReview =>
      widget.currentUsername != null &&
      widget.currentUsername!.isNotEmpty &&
      _review.username == widget.currentUsername;

  String _timeAgo(DateTime dt) {
    final diff = DateTime.now().difference(dt);
    if (diff.inSeconds < 60) return 'Just now';
    if (diff.inMinutes < 60) return '${diff.inMinutes}m ago';
    if (diff.inHours < 24) return '${diff.inHours}h ago';
    if (diff.inDays < 30) return '${diff.inDays}d ago';
    if (diff.inDays < 365) return '${(diff.inDays / 30).floor()}mo ago';
    return '${(diff.inDays / 365).floor()}y ago';
  }

  Color _avatarColor(String name) {
    final colors = [
      const Color(0xFF0F45CF), const Color(0xFF7C3AED), const Color(0xFFEC4899),
      const Color(0xFFF59E0B), const Color(0xFF10B981), const Color(0xFFEF4444),
      const Color(0xFF06B6D4), const Color(0xFF8B5CF6),
    ];
    return colors[name.hashCode.abs() % colors.length];
  }

  Future<void> _handleHelpful() async {
    if (_isOwnReview) return;
    try {
      final newCount = await widget.onHelpful(_review.id);
      if (mounted) {
        setState(() {
          _review = _review.copyWith(
            helpfulCount: newCount,
            userMarkedHelpful: !_review.userMarkedHelpful,
          );
        });
      }
    } catch (_) {}
  }

  Future<void> _handleFlag() async {
    if (_isOwnReview || _review.userFlagged) return;
    final confirmed = await showDialog<bool>(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('Report Review'),
        content: const Text('Are you sure you want to report this review as inappropriate?'),
        actions: [
          TextButton(onPressed: () => Navigator.pop(ctx, false), child: const Text('Cancel')),
          TextButton(
            onPressed: () => Navigator.pop(ctx, true),
            child: const Text('Report', style: TextStyle(color: Color(0xFFEF4444))),
          ),
        ],
      ),
    );
    if (confirmed != true) return;
    try {
      await widget.onFlag(_review.id);
      if (mounted) setState(() => _review = _review.copyWith(userFlagged: true));
    } catch (_) {}
  }

  @override
  Widget build(BuildContext context) {
    final comment = _review.comment ?? '';
    final isLong = comment.length > 150;
    final displayComment = isLong && !_expanded ? '${comment.substring(0, 150)}...' : comment;
    final initial = _review.username.isNotEmpty ? _review.username[0].toUpperCase() : '?';

    return Container(
      padding: const EdgeInsets.all(14),
      decoration: BoxDecoration(
        color: Colors.white,
        borderRadius: BorderRadius.circular(12),
        border: Border.all(color: const Color(0xFFF1F5F9)),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // Header row
          Row(
            children: [
              ClipOval(
                child: CachedNetworkImage(
                  imageUrl: 'https://api.dicebear.com/9.x/notionists/svg?seed=${Uri.encodeComponent(_review.username)}',
                  width: 36,
                  height: 36,
                  memCacheWidth: 72,
                  memCacheHeight: 72,
                  maxWidthDiskCache: 144,
                  maxHeightDiskCache: 144,
                  placeholder: (_, __) => CircleAvatar(
                    radius: 18,
                    backgroundColor: _avatarColor(_review.username),
                    child: Text(initial, style: const TextStyle(color: Colors.white, fontWeight: FontWeight.bold, fontSize: 15)),
                  ),
                  errorWidget: (_, __, ___) => CircleAvatar(
                    radius: 18,
                    backgroundColor: _avatarColor(_review.username),
                    child: Text(initial, style: const TextStyle(color: Colors.white, fontWeight: FontWeight.bold, fontSize: 15)),
                  ),
                ),
              ),
              const SizedBox(width: 10),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Row(
                      children: [
                        Flexible(
                          child: Text(
                            _review.username.split('@').first,
                            style: const TextStyle(fontWeight: FontWeight.w600, fontSize: 14, color: Color(0xFF1E293B)),
                            overflow: TextOverflow.ellipsis,
                          ),
                        ),
                        if (_review.isVerified) ...[
                          const SizedBox(width: 4),
                          const Icon(Icons.verified, size: 14, color: Color(0xFF22C55E)),
                        ],
                      ],
                    ),
                    const SizedBox(height: 2),
                    Text(_timeAgo(_review.createdAt), style: const TextStyle(fontSize: 11, color: Color(0xFF94A3B8))),
                  ],
                ),
              ),
              StarDisplay(rating: _review.rating.toDouble(), size: 14),
            ],
          ),
          // Comment
          if (comment.isNotEmpty) ...[
            const SizedBox(height: 10),
            Text(displayComment, style: const TextStyle(fontSize: 13, color: Color(0xFF334155), height: 1.4)),
            if (isLong)
              GestureDetector(
                onTap: () => setState(() => _expanded = !_expanded),
                child: Padding(
                  padding: const EdgeInsets.only(top: 2),
                  child: Text(
                    _expanded ? 'Show less' : 'Read more',
                    style: const TextStyle(fontSize: 12, color: Color(0xFF0F45CF), fontWeight: FontWeight.w600),
                  ),
                ),
              ),
          ],
          // Footer actions
          const SizedBox(height: 10),
          Row(
            children: [
              // Helpful button
              InkWell(
                onTap: _isOwnReview ? null : _handleHelpful,
                borderRadius: BorderRadius.circular(8),
                child: Padding(
                  padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
                  child: Row(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      Icon(
                        _review.userMarkedHelpful ? Icons.thumb_up : Icons.thumb_up_outlined,
                        size: 15,
                        color: _review.userMarkedHelpful ? const Color(0xFF0F45CF) : const Color(0xFF94A3B8),
                      ),
                      if (_review.helpfulCount > 0) ...[
                        const SizedBox(width: 4),
                        Text(
                          '${_review.helpfulCount}',
                          style: TextStyle(
                            fontSize: 12,
                            color: _review.userMarkedHelpful ? const Color(0xFF0F45CF) : const Color(0xFF94A3B8),
                          ),
                        ),
                      ],
                    ],
                  ),
                ),
              ),
              const SizedBox(width: 8),
              // Flag button
              if (!_isOwnReview)
                InkWell(
                  onTap: _review.userFlagged ? null : _handleFlag,
                  borderRadius: BorderRadius.circular(8),
                  child: Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
                    child: Icon(
                      _review.userFlagged ? Icons.flag : Icons.flag_outlined,
                      size: 15,
                      color: _review.userFlagged ? const Color(0xFFEF4444) : const Color(0xFF94A3B8),
                    ),
                  ),
                ),
            ],
          ),
        ],
      ),
    );
  }
}