import 'package:flutter/material.dart';

import '../theme/app_status_colors.dart';
import '../theme/app_surfaces.dart';

/// One entry in an [AppStatusSummaryRow].
class AppStatusSummaryItem {
  const AppStatusSummaryItem({
    required this.label,
    required this.count,
    required this.kind,
    this.selected = false,
    this.onTap,
  });

  final String label;
  final int count;
  final StatusKind kind;

  /// Emphasized (filled) when true — used for the active filter.
  final bool selected;

  /// When set, the chip is tappable (e.g. to filter the list by this status).
  final VoidCallback? onTap;
}

/// A horizontally-scrollable row of status-count chips — the single shared
/// "count-by-status" summary used above entity lists (unifies the separate
/// tickets / tasks / ISR summary-chip implementations).
class AppStatusSummaryRow extends StatelessWidget {
  const AppStatusSummaryRow({
    super.key,
    required this.items,
    this.padding = EdgeInsets.zero,
  });

  final List<AppStatusSummaryItem> items;
  final EdgeInsetsGeometry padding;

  @override
  Widget build(BuildContext context) {
    if (items.isEmpty) return const SizedBox.shrink();
    return SingleChildScrollView(
      scrollDirection: Axis.horizontal,
      padding: padding,
      child: Row(
        children: [
          for (var i = 0; i < items.length; i++) ...[
            if (i > 0) const SizedBox(width: 8),
            AppStatusSummaryChip(item: items[i]),
          ],
        ],
      ),
    );
  }
}

/// A single status-count chip: a status dot + bold count + label. Filled with
/// the status tone when [AppStatusSummaryItem.selected], subtle otherwise.
class AppStatusSummaryChip extends StatelessWidget {
  const AppStatusSummaryChip({super.key, required this.item});

  final AppStatusSummaryItem item;

  @override
  Widget build(BuildContext context) {
    final cs = Theme.of(context).colorScheme;
    final tt = Theme.of(context).textTheme;
    final swatch = AppStatusColors.of(context).byKind(item.kind);
    final radius = AppSurfaces.of(context).chipRadius;

    final bg = item.selected ? swatch.container : cs.surfaceContainerHighest;
    final labelColor =
        item.selected ? swatch.onContainer : cs.onSurfaceVariant;
    final countColor = item.selected ? swatch.onContainer : cs.onSurface;

    final chip = AnimatedContainer(
      duration: const Duration(milliseconds: 200),
      padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
      decoration: BoxDecoration(
        color: bg,
        borderRadius: BorderRadius.circular(radius),
        border: Border.all(
          color: item.selected ? Colors.transparent : cs.outlineVariant,
        ),
      ),
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          Container(
            width: 8,
            height: 8,
            decoration: BoxDecoration(
              color: swatch.color,
              shape: BoxShape.circle,
            ),
          ),
          const SizedBox(width: 8),
          Text(
            item.count.toString(),
            style: tt.labelLarge?.copyWith(
              color: countColor,
              fontWeight: FontWeight.w700,
            ),
          ),
          const SizedBox(width: 6),
          Text(
            item.label.toUpperCase(),
            style: tt.labelSmall?.copyWith(
              color: labelColor,
              fontWeight: FontWeight.w600,
              letterSpacing: 0.4,
            ),
          ),
        ],
      ),
    );

    if (item.onTap == null) return chip;
    return InkWell(
      onTap: item.onTap,
      borderRadius: BorderRadius.circular(radius),
      child: chip,
    );
  }
}