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

import '../data/models/knowledge_item.dart';

class KnowledgeItemCard extends StatelessWidget {
  final KnowledgeItem item;
  const KnowledgeItemCard({super.key, required this.item});

  IconData get _icon => switch (item.noteType) {
        'person' => Icons.person_outlined,
        'place' => Icons.place_outlined,
        'list' => Icons.checklist_outlined,
        'task' => Icons.task_alt_outlined,
        _ => Icons.description_outlined,
      };

  Color _statusColor(BuildContext context) {
    if (item.noteType != 'task') return Theme.of(context).colorScheme.primary;
    return switch (item.status) {
      'done' => Colors.green,
      'in_progress' => Colors.orange,
      'cancelled' => Colors.grey,
      _ => Theme.of(context).colorScheme.primary,
    };
  }

  String? get _subtitle {
    if (item.noteType == 'task') {
      if (item.dueDate != null) return 'Due ${item.dueDate}';
      return item.status;
    }
    if (item.body.trim().isEmpty) return null;
    final preview = item.body.trim().replaceAll('\n', ' ');
    return preview.length > 120 ? '${preview.substring(0, 120)}…' : preview;
  }

  @override
  Widget build(BuildContext context) {
    return ListTile(
      leading: Icon(_icon, color: _statusColor(context)),
      title: Text(
        item.title.isEmpty ? '(untitled)' : item.title,
        maxLines: 1,
        overflow: TextOverflow.ellipsis,
      ),
      subtitle: _subtitle != null
          ? Text(
              _subtitle!,
              maxLines: 2,
              overflow: TextOverflow.ellipsis,
              style: Theme.of(context).textTheme.bodySmall,
            )
          : null,
      trailing: item.tags.isNotEmpty ? _TagChips(tags: item.tags) : null,
      onTap: () {
        if (item.noteType == 'task') {
          context.push('/tasks/${item.id}/edit');
        } else {
          context.push('/notes/${item.id}');
        }
      },
    );
  }
}

class _TagChips extends StatelessWidget {
  final List<String> tags;
  const _TagChips({required this.tags});

  @override
  Widget build(BuildContext context) {
    final shown = tags.take(2).toList();
    final extra = tags.length - shown.length;
    return Wrap(
      spacing: 4,
      children: [
        for (final t in shown)
          Chip(
            label: Text(t, style: const TextStyle(fontSize: 10)),
            padding: EdgeInsets.zero,
            materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
            visualDensity: VisualDensity.compact,
          ),
        if (extra > 0)
          Chip(
            label: Text('+$extra', style: const TextStyle(fontSize: 10)),
            padding: EdgeInsets.zero,
            materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
            visualDensity: VisualDensity.compact,
          ),
      ],
    );
  }
}