import 'package:flutter/material.dart';

import '../data/models.dart';
import '../theme/lawheatmap_tokens.dart';
import 'lawheatmap_card.dart';
import 'source_chip.dart';

/// Sidebar listing the citable sources behind an evaluation.
/// Surfaces the methodological audit story: every figure has a
/// source and an evidence tier.
class EvidenceSidebar extends StatelessWidget {
  const EvidenceSidebar({super.key, required this.evaluation});

  final Evaluation evaluation;

  @override
  Widget build(BuildContext context) {
    final t = Theme.of(context).textTheme;
    return LawHeatmapCard(
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text('Quellen', style: t.headlineSmall),
          const SizedBox(height: LawHeatmapSpace.sm),
          Text(
            'Jede Zahl trägt die Tier-Stufe ihres schwächsten '
            'Bestandteils (Regel der niedrigsten Stufe, §6.7).',
            style: t.labelSmall?.copyWith(color: LawHeatmapColors.mute),
          ),
          const SizedBox(height: LawHeatmapSpace.lg),
          for (final s in evaluation.sources) SourceChip(source: s),
          const Divider(height: LawHeatmapSpace.xl),
          Text('Audit-Event', style: t.labelLarge),
          const SizedBox(height: 4),
          SelectableText(
            evaluation.auditEventId,
            style: t.labelSmall?.copyWith(
              fontFamily: LawHeatmapTypography.mono,
              color: LawHeatmapColors.mute,
            ),
          ),
          const SizedBox(height: LawHeatmapSpace.sm),
          Text(
            'Quell-SHA-256:',
            style: t.labelSmall?.copyWith(color: LawHeatmapColors.mute),
          ),
          SelectableText(
            evaluation.norm.sourceSha256,
            style: t.labelSmall?.copyWith(
              fontFamily: LawHeatmapTypography.mono,
              color: LawHeatmapColors.mute,
              fontSize: 10,
            ),
          ),
        ],
      ),
    );
  }
}