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

import '../../../../services/analysis_providers.dart';
import '../../../shared/presentation/widgets/async_value_view.dart';
import '../../../shared/presentation/widgets/lab_section_scaffold.dart';

class ConclusionPage extends ConsumerWidget {
  const ConclusionPage({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final theme = Theme.of(context);
    final snapshot = ref.watch(selectedSessionSnapshotProvider);

    return LabSectionScaffold(
      eyebrow: 'Conclusion',
      title: 'Review the evidence-backed result.',
      description:
          'This page presents ranked findings, supporting evidence, contradicting evidence, uncertainty, and next-step suggestions from the AI analyst.',
      children: [
        AsyncValueView(
          value: snapshot,
          loadingMessage: 'Loading conclusion...',
          data: (session) {
            if (session == null) {
              return const Card(
                child: Padding(
                  padding: EdgeInsets.all(20),
                  child: Text('No session selected yet.'),
                ),
              );
            }

            final conclusion = session.conclusion;
            return Column(
              children: [
                Card(
                  child: Padding(
                    padding: const EdgeInsets.all(20),
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Text('Summary', style: theme.textTheme.titleLarge),
                        const SizedBox(height: 8),
                        Text(
                          conclusion.summary,
                          style: theme.textTheme.bodyLarge,
                        ),
                      ],
                    ),
                  ),
                ),
                const SizedBox(height: 16),
                Card(
                  child: Padding(
                    padding: const EdgeInsets.all(20),
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Text(
                          'Leading Hypotheses',
                          style: theme.textTheme.titleLarge,
                        ),
                        const SizedBox(height: 12),
                        ...session.hypotheses.map(
                          (hypothesis) => ListTile(
                            contentPadding: EdgeInsets.zero,
                            title: Text(hypothesis.label),
                            subtitle: Text(hypothesis.rationale),
                            trailing: Text(
                              hypothesis.confidence.toStringAsFixed(2),
                            ),
                          ),
                        ),
                      ],
                    ),
                  ),
                ),
                const SizedBox(height: 16),
                Card(
                  child: Padding(
                    padding: const EdgeInsets.all(20),
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Text('Findings', style: theme.textTheme.titleLarge),
                        const SizedBox(height: 12),
                        ...conclusion.findings.map(
                          (finding) => Padding(
                            padding: const EdgeInsets.only(bottom: 16),
                            child: Column(
                              crossAxisAlignment: CrossAxisAlignment.start,
                              children: [
                                Text(
                                  '${finding.label} | ${finding.confidence.toStringAsFixed(2)}',
                                  style: theme.textTheme.titleMedium,
                                ),
                                const SizedBox(height: 6),
                                ...finding.supportingEvidence.map(
                                  (item) => Text('- $item'),
                                ),
                                const SizedBox(height: 4),
                                ...finding.contradictingEvidence.map(
                                  (item) => Text('Conflict: $item'),
                                ),
                              ],
                            ),
                          ),
                        ),
                        Text('Uncertainty', style: theme.textTheme.titleLarge),
                        const SizedBox(height: 8),
                        ...conclusion.uncertainty.map(
                          (item) => Text('- $item'),
                        ),
                        const SizedBox(height: 16),
                        Text(
                          'Suggested Next Actions',
                          style: theme.textTheme.titleLarge,
                        ),
                        const SizedBox(height: 8),
                        ...conclusion.suggestedNextActions.map(
                          (item) => Text('- $item'),
                        ),
                      ],
                    ),
                  ),
                ),
              ],
            );
          },
        ),
      ],
    );
  }
}