VeloeKemonoPartyFlutter/lib/pages/widgets/post_detail_view.dart

import 'package:flutter/material.dart';
import 'package:flutter_widget_from_html/flutter_widget_from_html.dart';
import 'package:url_launcher/url_launcher.dart';
import 'package:veloe_kemono_party_flutter/models/attachment.dart';
import 'package:veloe_kemono_party_flutter/models/post.dart';
import 'package:veloe_kemono_party_flutter/pages/widgets/smart_image_container.dart';

class PostDetailView extends StatelessWidget {
  final Post post;
  
  const PostDetailView({super.key, required this.post});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(post.title),
        elevation: 0,
      ),
      body: LayoutBuilder(
        builder: (context, constraints) {
          return ConstrainedBox(
            constraints: BoxConstraints(
              minHeight: constraints.maxHeight,
              maxWidth: constraints.maxWidth,
            ),
            child: Column(
              mainAxisSize: MainAxisSize.min,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                // Header Section
                _buildTitle(context),
                
                // Content Area
                Flexible(
                  child: Column(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      if (post.attachments.isNotEmpty)
                        _buildImageColumn(post.attachments),
                      _buildHtmlContent(),
                    ],
                  ),
                ),
                
                // Footer Section
                _buildDateDisplay(context),
              ],
            ),
          );
        },
      ),
    );
  }

  Widget _buildTitle(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(16.0),
      child: Text(
        post.title,
        style: Theme.of(context).textTheme.headlineMedium?.copyWith(
          fontWeight: FontWeight.w600,
        ),
      ),
    );
  }

  Widget _buildImageColumn(List<Attachment> attachments) {
    return Column(
      children: attachments
        .where((attachment) => _isImageFile(attachment.link))
        .map((attachment) {
        return Padding(
          padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
          child: SmartImageContainer(imageUrl: attachment.link),
        );
      }).toList(),
    );
  }

  bool _isImageFile(String url) {
  try {
    final uri = Uri.parse(url);
    final path = uri.path.toLowerCase();
    
    final cleanPath = path.split('?').first.split('#').first;
    const imageExtensions = {
      'jpg', 'jpeg', 'png', 'gif', 'bmp', 'webp', 'svg',
      'tiff', 'heic', 'heif' 
    };
    return imageExtensions.any((ext) => cleanPath.endsWith('.$ext'));
  } catch (e) {
    return false; // Invalid URL format
  }
}

  Widget _buildHtmlContent() {
    return Padding(
      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 24),
      child: HtmlWidget(
        post.content,
        renderMode: RenderMode.column,
        onTapUrl: (url) => launchUrl(Uri.parse(url)),
        customWidgetBuilder: (element) {
          if (element.localName == 'img') {
            final src = element.attributes['src'];
            return src != null 
                ? Padding(
                    padding: const EdgeInsets.symmetric(vertical: 8),
                    child: SmartImageContainer(imageUrl: src),
                  )
                : const SizedBox.shrink();
          }
          return null;
        },
      ),
    );
  }

  Widget _buildDateDisplay(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(16.0),
      child: Row(
        children: [
          Icon(Icons.calendar_today, size: 18, color: Colors.grey[700]),
          const SizedBox(width: 8),
          Text(post.published
            ,
            style: Theme.of(context).textTheme.bodyLarge?.copyWith(
              color: Colors.grey[700],
            ),
          ),
        ],
      ),
    );
  }
}