import 'package:flutter/material.dart';

import '../data/models.dart';
import '../theme/reclaim_tokens.dart';

/// Freshness badge — flags when a norm version is stale relative to
/// the published source (amended upstream) or hasn't been reconciled.
/// By design it renders NOTHING for [Freshness.current] (the common
/// case shouldn't add noise) unless [alwaysShow] is set. Same chip
/// shape as the scope/tier badges.
class FreshnessBadge extends StatelessWidget {
  const FreshnessBadge({
    super.key,
    required this.freshness,
    this.note,
    this.compact = false,
    this.alwaysShow = false,
  });

  final Freshness freshness;

  /// Optional plain-text hint of what changed (from Norm.supersededNote).
  final String? note;
  final bool compact;
  final bool alwaysShow;

  @override
  Widget build(BuildContext context) {
    if (!freshness.needsBadge && !alwaysShow) {
      return const SizedBox.shrink();
    }
    final t = Theme.of(context).textTheme;
    final color = switch (freshness) {
      Freshness.current => ReclaimColors.signal,
      Freshness.superseded => ReclaimColors.freshSuperseded,
      Freshness.unknown => ReclaimColors.freshUnknown,
    };
    final icon = switch (freshness) {
      Freshness.current => Icons.check_circle_outline,
      Freshness.superseded => Icons.history_toggle_off,
      Freshness.unknown => Icons.help_outline,
    };
    final label = compact ? freshness.label : 'Stand: ${freshness.label}';
    return Tooltip(
      message: '${freshness.description}'
          '${note != null && note!.isNotEmpty ? '\n$note' : ''}',
      child: Container(
        padding: EdgeInsets.symmetric(
          horizontal: compact ? 6 : ReclaimSpace.sm,
          vertical: compact ? 2 : 4,
        ),
        decoration: BoxDecoration(
          color: color.withValues(alpha: 0.18),
          border: Border.all(color: color.withValues(alpha: 0.55)),
          borderRadius: const BorderRadius.all(ReclaimRadius.sm),
        ),
        child: Row(
          mainAxisSize: MainAxisSize.min,
          children: [
            Icon(icon, size: compact ? 12 : 14, color: color),
            const SizedBox(width: 6),
            Text(
              label,
              style: (compact ? t.labelSmall : t.labelLarge)?.copyWith(
                color: color,
                fontWeight: FontWeight.w600,
              ),
            ),
          ],
        ),
      ),
    );
  }
}