import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';

import '../../../core/constants/design_system.dart';
import '../../../domain/entities/social_post.dart';
import '../../widgets/animated_widgets.dart';
import '../../widgets/fullscreen_image_viewer.dart';
import '../../widgets/social_header_widget.dart';
import '../../widgets/social_interaction_row.dart';

/// Card moderne et élaborée pour afficher un post social.
///
/// Design inspiré d'Instagram avec hiérarchie visuelle claire,
/// support de contenu riche (hashtags, mentions) et animations fluides.
class SocialCard extends StatefulWidget {
  const SocialCard({
    required this.post,
    required this.onLike,
    required this.onComment,
    required this.onShare,
    required this.onDeletePost,
    required this.onEditPost,
    this.showVerifiedBadge = false,
    super.key,
  });

  final SocialPost post;
  final VoidCallback onLike;
  final VoidCallback onComment;
  final VoidCallback onShare;
  final VoidCallback onDeletePost;
  final VoidCallback onEditPost;
  final bool showVerifiedBadge;

  @override
  State<SocialCard> createState() => _SocialCardState();
}

class _SocialCardState extends State<SocialCard> {
  bool _showFullContent = false;

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);

    return AnimatedCard(
      margin: const EdgeInsets.only(bottom: DesignSystem.spacingMd),
      borderRadius: DesignSystem.borderRadiusMd,
      elevation: 0.5,
      hoverElevation: 1.5,
      padding: EdgeInsets.zero,
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // Header avec avatar, nom, timestamp
          Padding(
            padding: const EdgeInsets.fromLTRB(
              DesignSystem.spacingLg,
              DesignSystem.spacingMd,
              DesignSystem.spacingSm,
              DesignSystem.spacingMd,
            ),
            child: SocialHeaderWidget(
              post: widget.post,
              onEditPost: widget.onEditPost,
              menuKey: GlobalKey(),
              menuContext: context,
              onClosePost: () {},
              showVerifiedBadge: widget.showVerifiedBadge,
            ),
          ),

          // Image du post avec Hero animation
          if (widget.post.imageUrl != null && widget.post.imageUrl!.isNotEmpty)
            _buildPostImage(context, theme),

          // Contenu et interactions
          Padding(
            padding: const EdgeInsets.all(DesignSystem.spacingLg),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                // Barre d'interactions (like, comment, share)
                SocialInteractionRow(
                  post: widget.post,
                  onLike: widget.onLike,
                  onComment: widget.onComment,
                  onShare: widget.onShare,
                ),

                const SizedBox(height: DesignSystem.spacingMd),

                // Nombre de likes
                if (widget.post.likesCount > 0)
                  _buildLikesCount(theme),

                // Contenu du post avec texte enrichi
                _buildPostContent(theme),

                // Nombre de commentaires
                if (widget.post.commentsCount > 0)
                  _buildCommentsCount(theme),
              ],
            ),
          ),
        ],
      ),
    );
  }

  /// Construit l'image du post avec Hero animation et double-tap to like
  Widget _buildPostImage(BuildContext context, ThemeData theme) {
    return GestureDetector(
      onDoubleTap: () {
        if (!widget.post.isLikedByCurrentUser) {
          widget.onLike();
          _showLikeAnimation();
        }
      },
      onTap: () => _openFullscreenImage(context),
      child: AspectRatio(
        aspectRatio: 1.0,
        child: Container(
          width: double.infinity,
          decoration: BoxDecoration(
            color: theme.colorScheme.surfaceVariant.withOpacity(0.3),
          ),
          child: Hero(
            tag: 'social_post_image_${widget.post.id}',
            child: Image.network(
              widget.post.imageUrl!,
              fit: BoxFit.cover,
              loadingBuilder: (context, child, loadingProgress) {
                if (loadingProgress == null) return child;
                return Center(
                  child: CircularProgressIndicator(
                    value: loadingProgress.expectedTotalBytes != null
                        ? loadingProgress.cumulativeBytesLoaded /
                            loadingProgress.expectedTotalBytes!
                        : null,
                    strokeWidth: 2.5,
                  ),
                );
              },
              errorBuilder: (context, error, stackTrace) {
                return Container(
                  color: theme.colorScheme.surfaceVariant.withOpacity(0.5),
                  child: Center(
                    child: Icon(
                      Icons.broken_image_rounded,
                      size: 48,
                      color: theme.colorScheme.onSurfaceVariant.withOpacity(0.5),
                    ),
                  ),
                );
              },
            ),
          ),
        ),
      ),
    );
  }

  /// Construit le compteur de likes
  Widget _buildLikesCount(ThemeData theme) {
    return Padding(
      padding: const EdgeInsets.only(bottom: DesignSystem.spacingMd),
      child: Text(
        _formatLikesCount(widget.post.likesCount),
        style: theme.textTheme.labelMedium?.copyWith(
          fontWeight: FontWeight.w600,
          fontSize: 13,
          letterSpacing: -0.1,
        ),
      ),
    );
  }

  /// Construit le contenu du post avec texte enrichi
  Widget _buildPostContent(ThemeData theme) {
    final content = widget.post.content;
    final shouldTruncate = content.length > 150 && !_showFullContent;

    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        RichText(
          text: TextSpan(
            style: theme.textTheme.bodyMedium?.copyWith(
              fontSize: 14,
              height: 1.4,
              letterSpacing: -0.1,
            ),
            children: [
              // Nom de l'auteur en gras
              TextSpan(
                text: '${widget.post.authorFullName} ',
                style: const TextStyle(fontWeight: FontWeight.w600),
              ),
              // Contenu avec support des hashtags et mentions
              ..._buildEnrichedContent(
                shouldTruncate ? '${content.substring(0, 150)}...' : content,
                theme,
              ),
            ],
          ),
        ),

        // Bouton "Voir plus" / "Voir moins"
        if (content.length > 150)
          GestureDetector(
            onTap: () {
              setState(() {
                _showFullContent = !_showFullContent;
              });
            },
            child: Padding(
              padding: const EdgeInsets.only(top: DesignSystem.spacingXs),
              child: Text(
                _showFullContent ? 'Voir moins' : 'Voir plus',
                style: theme.textTheme.bodySmall?.copyWith(
                  color: theme.colorScheme.onSurface.withOpacity(0.5),
                  fontSize: 13,
                  fontWeight: FontWeight.w500,
                ),
              ),
            ),
          ),
      ],
    );
  }

  /// Construit le compteur de commentaires
  Widget _buildCommentsCount(ThemeData theme) {
    return GestureDetector(
      onTap: widget.onComment,
      child: Padding(
        padding: const EdgeInsets.only(top: DesignSystem.spacingMd),
        child: Text(
          _formatCommentsCount(widget.post.commentsCount),
          style: theme.textTheme.bodySmall?.copyWith(
            color: theme.colorScheme.onSurface.withOpacity(0.5),
            fontSize: 13,
          ),
        ),
      ),
    );
  }

  /// Construit le contenu enrichi avec hashtags et mentions cliquables
  List<TextSpan> _buildEnrichedContent(String content, ThemeData theme) {
    final spans = <TextSpan>[];
    final words = content.split(' ');

    for (var i = 0; i < words.length; i++) {
      final word = words[i];

      if (word.startsWith('#')) {
        // Hashtag
        spans.add(
          TextSpan(
            text: word,
            style: TextStyle(
              color: theme.colorScheme.primary,
              fontWeight: FontWeight.w600,
            ),
            recognizer: TapGestureRecognizer()
              ..onTap = () {
                _handleHashtagTap(word.substring(1));
              },
          ),
        );
      } else if (word.startsWith('@')) {
        // Mention
        spans.add(
          TextSpan(
            text: word,
            style: TextStyle(
              color: theme.colorScheme.primary,
              fontWeight: FontWeight.w600,
            ),
            recognizer: TapGestureRecognizer()
              ..onTap = () {
                _handleMentionTap(word.substring(1));
              },
          ),
        );
      } else {
        // Texte normal
        spans.add(TextSpan(text: word));
      }

      // Ajouter un espace sauf pour le dernier mot
      if (i < words.length - 1) {
        spans.add(const TextSpan(text: ' '));
      }
    }

    return spans;
  }

  /// Ouvre l'image en plein écran avec Hero animation
  void _openFullscreenImage(BuildContext context) {
    Navigator.push<void>(
      context,
      PageRouteBuilder<void>(
        opaque: false,
        barrierColor: Colors.black,
        pageBuilder: (context, animation, secondaryAnimation) {
          return FadeTransition(
            opacity: animation,
            child: FullscreenImageViewer(
              imageUrl: widget.post.imageUrl!,
              heroTag: 'social_post_image_${widget.post.id}',
              title: widget.post.content,
            ),
          );
        },
      ),
    );
  }

  /// Affiche l'animation de like
  void _showLikeAnimation() {
    // TODO: Implémenter animation de coeur qui apparaît au centre
    if (mounted) {
      // Animation visuelle rapide
    }
  }

  /// Gère le tap sur un hashtag
  void _handleHashtagTap(String hashtag) {
    debugPrint('[SocialCard] Hashtag cliqué: #$hashtag');
    // TODO: Naviguer vers la page des posts avec ce hashtag
  }

  /// Gère le tap sur une mention
  void _handleMentionTap(String username) {
    debugPrint('[SocialCard] Mention cliquée: @$username');
    // TODO: Naviguer vers le profil de l'utilisateur
  }

  /// Formate le nombre de likes
  String _formatLikesCount(int count) {
    if (count == 1) {
      return '1 j\'aime';
    }
    return '${_formatCount(count)} j\'aime';
  }

  /// Formate le nombre de commentaires
  String _formatCommentsCount(int count) {
    if (count == 1) {
      return 'Voir le commentaire';
    }
    return 'Voir les $count commentaires';
  }

  /// Formate les compteurs (1K, 1M, etc.)
  String _formatCount(int count) {
    if (count >= 1000000) {
      final value = count / 1000000;
      return value % 1 == 0
          ? '${value.toInt()} M'
          : '${value.toStringAsFixed(1)} M';
    } else if (count >= 1000) {
      final value = count / 1000;
      return value % 1 == 0 ? '${value.toInt()} K' : '${value.toStringAsFixed(1)} K';
    }
    return count.toString();
  }
}