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

import '../data/local/database.dart';
import '../data/models/knowledge_item.dart';
import 'pending_sync_badge.dart';

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

  String get _pendingDomain =>
      item.noteType == 'task' ? kSyncDomainTasks : kSyncDomainNotes;

  IconData get _icon => switch (item.noteType) {
        'person' => LucideIcons.user,
        'place' => LucideIcons.mapPin,
        'list' => LucideIcons.listChecks,
        'task' => LucideIcons.checkCircle2,
        _ => LucideIcons.fileText,
      };

  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.body.trim().isNotEmpty) {
        final preview = item.body.trim().replaceAll('\n', ' ');
        return preview.length > 200 ? '${preview.substring(0, 200)}…' : preview;
      }
      if (item.dueDate != null) return 'Due ${item.dueDate}';
      return item.status;
    }
    if (item.body.trim().isEmpty) return null;
    final preview = item.body.trim().replaceAll('\n', ' ');
    return preview.length > 200 ? '${preview.substring(0, 200)}…' : preview;
  }

  void _onTap(BuildContext context) {
    if (item.noteType == 'task') {
      context.push('/tasks/${item.id}/edit');
    } else {
      context.push('/notes/${item.id}');
    }
  }

  @override
  Widget build(BuildContext context) {
    return ListTile(
      leading: Icon(_icon, color: _statusColor(context)),
      title: Row(
        children: [
          Flexible(
            child: Text(
              item.title.isEmpty ? '(untitled)' : item.title,
              maxLines: 1,
              overflow: TextOverflow.ellipsis,
            ),
          ),
          PendingSyncBadge(domain: _pendingDomain, id: item.id),
        ],
      ),
      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: () => _onTap(context),
    );
  }

  Widget buildGridCard(BuildContext context) {
    final scheme = Theme.of(context).colorScheme;
    final textTheme = Theme.of(context).textTheme;
    return Card(
      elevation: 0,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(10),
        side: BorderSide(color: scheme.outlineVariant),
      ),
      child: InkWell(
        borderRadius: BorderRadius.circular(10),
        onTap: () => _onTap(context),
        child: Padding(
          padding: const EdgeInsets.all(12),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Row(
                children: [
                  Icon(_icon, size: 18, color: _statusColor(context)),
                  const SizedBox(width: 8),
                  Expanded(
                    child: Text(
                      item.title.isEmpty ? '(untitled)' : item.title,
                      maxLines: 2,
                      overflow: TextOverflow.ellipsis,
                      style: textTheme.titleSmall
                          ?.copyWith(fontWeight: FontWeight.w600),
                    ),
                  ),
                  PendingSyncBadge(domain: _pendingDomain, id: item.id),
                ],
              ),
              if (_subtitle != null) ...[
                const SizedBox(height: 8),
                Expanded(
                  child: Text(
                    _subtitle!,
                    overflow: TextOverflow.ellipsis,
                    maxLines: 4,
                    style: textTheme.bodySmall?.copyWith(
                      color: scheme.onSurfaceVariant,
                      height: 1.4,
                    ),
                  ),
                ),
              ],
              if (item.tags.isNotEmpty) ...[
                const Spacer(),
                _TagChips(tags: item.tags),
              ],
            ],
          ),
        ),
      ),
    );
  }
}

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,
          ),
      ],
    );
  }
}