import 'package:flutter/material.dart';

import '../../../data/api/report_data_source.dart';
import '../../../data/models/models.dart';
import '../../../theme/wise_tokens.dart';
import '../../../widgets/app_card.dart';
import '../../../widgets/badges.dart';
import '../../../widgets/mini_player.dart';

typedef StartModuleAudio =
    void Function(
      String audioId,
      String reportId,
      String title,
      int durationSec,
    );

class ModuleRendererRegistry {
  const ModuleRendererRegistry();

  Widget card({
    required BuildContext context,
    required DisplayModule module,
    required ReportDetail report,
    required ReportDataSource dataSource,
    required PlayerStateModel player,
    StartModuleAudio? onStartAudio,
    VoidCallback? onToggleAudio,
    void Function(int delta)? onSeekAudio,
    VoidCallback? onSpeed,
  }) {
    final openDetail = module.hasDetailPage
        ? () => Navigator.of(context).push(
            MaterialPageRoute(
              builder: (_) => ModuleDetailPage(
                reportId: report.id,
                module: module,
                report: report,
                dataSource: dataSource,
                registry: this,
              ),
            ),
          )
        : null;
    return AppCard(
      onTap: openDetail,
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          _ModuleHeader(module: module),
          const SizedBox(height: WiseSpacing.x4),
          _contentFor(
            context,
            type: module.type,
            payload: module.renderMode == 'inline'
                ? module.content
                : module.preview,
            report: report,
            player: player,
            onStartAudio: onStartAudio,
            onToggleAudio: onToggleAudio,
            onSeekAudio: onSeekAudio,
            onSpeed: onSpeed,
            compact: module.renderMode != 'inline',
          ),
          if (module.hasDetailPage) ...[
            const SizedBox(height: WiseSpacing.x4),
            Align(
              alignment: Alignment.centerLeft,
              child: TextButton.icon(
                onPressed: openDetail,
                icon: const Icon(Icons.open_in_new),
                label: const Text('查看详情'),
              ),
            ),
          ],
        ],
      ),
    );
  }

  Widget page(
    BuildContext context,
    String type,
    JsonMap payload, {
    ReportDetail? report,
  }) {
    return _contentFor(
      context,
      type: type,
      payload: payload,
      report: report,
      player: const PlayerStateModel(),
      compact: false,
    );
  }

  Widget _contentFor(
    BuildContext context, {
    required String type,
    required JsonMap payload,
    required PlayerStateModel player,
    ReportDetail? report,
    StartModuleAudio? onStartAudio,
    VoidCallback? onToggleAudio,
    void Function(int delta)? onSeekAudio,
    VoidCallback? onSpeed,
    bool compact = false,
  }) {
    return switch (type) {
      'basic_info' => _BasicInfo(payload: payload, report: report),
      'core_insights' => _CoreInsights(payload: payload),
      'source_compliance' => _SourceCompliance(
        payload: payload,
        report: report,
      ),
      'audio' => _AudioModule(
        payload: payload,
        report: report,
        player: player,
        onStartAudio: onStartAudio,
        onToggleAudio: onToggleAudio,
        onSeekAudio: onSeekAudio,
        onSpeed: onSpeed,
      ),
      'institution' => _InstitutionModule(payload: payload, report: report),
      'executive_overview' => _SectionsModule(
        payload: payload,
        compact: compact,
      ),
      'key_data' => _KeyDataModule(payload: payload, compact: compact),
      'timeline' => _TimelineModule(payload: payload, compact: compact),
      'study_guide' => _StudyGuideModule(payload: payload, compact: compact),
      'structure_graph' => _StructureGraphModule(
        payload: payload,
        compact: compact,
      ),
      'related_sources' => _RelatedSourcesModule(
        payload: payload,
        compact: compact,
      ),
      'differentiated_view' => _DifferentiatedViewModule(
        payload: payload,
        compact: compact,
      ),
      'weaknesses' => _WeaknessesModule(payload: payload, compact: compact),
      'infographic' => _FallbackModule(type: '信息图', payload: payload),
      'research_discovery' => _FallbackModule(type: '延伸研究', payload: payload),
      _ => _FallbackModule(type: type, payload: payload),
    };
  }
}

class ModuleDetailPage extends StatefulWidget {
  const ModuleDetailPage({
    required this.reportId,
    required this.module,
    required this.report,
    required this.dataSource,
    required this.registry,
    super.key,
  });

  final String reportId;
  final DisplayModule module;
  final ReportDetail report;
  final ReportDataSource dataSource;
  final ModuleRendererRegistry registry;

  @override
  State<ModuleDetailPage> createState() => _ModuleDetailPageState();
}

class _ModuleDetailPageState extends State<ModuleDetailPage> {
  late Future<ModuleDetail> future = widget.dataSource.moduleDetail(
    widget.reportId,
    widget.module.id,
  );

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text(widget.module.titleCn)),
      body: FutureBuilder<ModuleDetail>(
        future: future,
        builder: (context, snapshot) {
          if (snapshot.connectionState != ConnectionState.done) {
            return const Center(child: CircularProgressIndicator());
          }
          if (snapshot.hasError) {
            return Center(
              child: Text(
                snapshot.error.toString(),
                textAlign: TextAlign.center,
              ),
            );
          }
          final detail = snapshot.data!;
          return ListView(
            padding: const EdgeInsets.all(WiseSpacing.x4),
            children: [
              AppCard(
                child: widget.registry.page(
                  context,
                  detail.type,
                  detail.content,
                  report: widget.report,
                ),
              ),
              const SizedBox(height: WiseSpacing.x3),
              Text(
                '缓存版本 ${detail.cacheVersion}',
                style: Theme.of(context).textTheme.bodySmall,
              ),
            ],
          );
        },
      ),
    );
  }
}

class _ModuleHeader extends StatelessWidget {
  const _ModuleHeader({required this.module});

  final DisplayModule module;

  @override
  Widget build(BuildContext context) {
    return Row(
      children: [
        Expanded(
          child: Text(
            module.titleCn,
            style: Theme.of(context).textTheme.titleMedium,
          ),
        ),
        if (module.layer.isNotEmpty)
          AppBadge(text: module.layer.toUpperCase(), kind: BadgeKind.brand),
      ],
    );
  }
}

class _BasicInfo extends StatelessWidget {
  const _BasicInfo({required this.payload, required this.report});

  final JsonMap payload;
  final ReportDetail? report;

  @override
  Widget build(BuildContext context) {
    final topics = asStringList(payload['topics']).isEmpty
        ? report?.topics ?? const []
        : asStringList(payload['topics']);
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Text(
          asString(
            payload['summary_cn'],
            asString(payload['scope_cn'], report?.oneLiner ?? ''),
          ),
          style: Theme.of(context).textTheme.bodyMedium,
        ),
        const SizedBox(height: WiseSpacing.x2),
        Wrap(
          spacing: WiseSpacing.x2,
          runSpacing: WiseSpacing.x2,
          children: [
            for (final topic in topics) AppBadge(text: topic),
            if (report?.releasedAt != null)
              AppBadge(text: formatDate(report!.releasedAt)),
          ],
        ),
      ],
    );
  }
}

class _CoreInsights extends StatelessWidget {
  const _CoreInsights({required this.payload});

  final JsonMap payload;

  @override
  Widget build(BuildContext context) {
    final points = asMapList(payload['points']);
    if (points.isEmpty) return _TextLines(payload: payload);
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        for (final point in points)
          Padding(
            padding: const EdgeInsets.only(bottom: WiseSpacing.x3),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                AppBadge(
                  text: _kindLabel(asString(point['kind'])),
                  kind: _kindBadge(asString(point['kind'])),
                ),
                const SizedBox(height: WiseSpacing.x1),
                Text(
                  asString(point['text']),
                  style: Theme.of(context).textTheme.bodyMedium,
                ),
              ],
            ),
          ),
      ],
    );
  }
}

class _SourceCompliance extends StatelessWidget {
  const _SourceCompliance({required this.payload, required this.report});

  final JsonMap payload;
  final ReportDetail? report;

  @override
  Widget build(BuildContext context) {
    final institution = report?.institution;
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        if (asString(payload['source_note']).isNotEmpty)
          Text(
            asString(payload['source_note']),
            style: Theme.of(context).textTheme.bodyMedium,
          ),
        if (institution != null) ...[
          const SizedBox(height: WiseSpacing.x4),
          Text('发布机构', style: Theme.of(context).textTheme.titleMedium),
          const SizedBox(height: WiseSpacing.x2),
          _InfoLine(label: '机构名称', value: institution.nameCn),
          if (institution.nameEn.isNotEmpty)
            _InfoLine(label: '英文名称', value: institution.nameEn),
          if (institution.institutionType.isNotEmpty)
            _InfoLine(
              label: '机构类型',
              value: _institutionTypeLabel(institution.institutionType),
            ),
          if (institution.sourceTier.isNotEmpty)
            _InfoLine(label: '来源层级', value: institution.sourceTier),
          if (institution.reportCount > 0)
            _InfoLine(label: '收录报告', value: '${institution.reportCount} 份'),
          if (institution.coveredTopics.isNotEmpty)
            _InfoLine(
              label: '覆盖主题',
              value: institution.coveredTopics.join('、'),
            ),
          if (institution.websiteUrl.isNotEmpty)
            _InfoLine(label: '官网', value: institution.websiteUrl),
          if (institution.introCn.isNotEmpty)
            _InfoLine(label: '说明', value: institution.introCn),
        ],
        if (asString(payload['copyright_cn']).isNotEmpty) ...[
          const SizedBox(height: WiseSpacing.x4),
          Text(
            asString(payload['copyright_cn']),
            style: Theme.of(context).textTheme.bodySmall,
          ),
        ],
        const SizedBox(height: WiseSpacing.x3),
        DecoratedBox(
          decoration: BoxDecoration(
            color: const Color(0x109A6500),
            borderRadius: BorderRadius.circular(WiseRadius.sm),
          ),
          child: Padding(
            padding: const EdgeInsets.all(WiseSpacing.x3),
            child: Text(
              asString(payload['disclaimer'], '本内容为公开/授权研报的结构化解读，不构成投资建议。'),
              style: Theme.of(
                context,
              ).textTheme.bodySmall?.copyWith(color: WiseColors.warning),
            ),
          ),
        ),
      ],
    );
  }
}

class _InfoLine extends StatelessWidget {
  const _InfoLine({required this.label, required this.value});

  final String label;
  final String value;

  @override
  Widget build(BuildContext context) {
    if (value.isEmpty) return const SizedBox.shrink();
    return Padding(
      padding: const EdgeInsets.only(bottom: WiseSpacing.x2),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(
            label,
            style: Theme.of(
              context,
            ).textTheme.labelSmall?.copyWith(color: WiseColors.ink700),
          ),
          const SizedBox(height: WiseSpacing.x1),
          Text(value, style: Theme.of(context).textTheme.bodyMedium),
        ],
      ),
    );
  }
}

class _AudioModule extends StatelessWidget {
  const _AudioModule({
    required this.payload,
    required this.report,
    required this.player,
    this.onStartAudio,
    this.onToggleAudio,
    this.onSeekAudio,
    this.onSpeed,
  });

  final JsonMap payload;
  final ReportDetail? report;
  final PlayerStateModel player;
  final StartModuleAudio? onStartAudio;
  final VoidCallback? onToggleAudio;
  final void Function(int delta)? onSeekAudio;
  final VoidCallback? onSpeed;

  @override
  Widget build(BuildContext context) {
    final title = asString(payload['title_cn'], report?.titleCn ?? '音频解读');
    final audioId = asString(
      payload['audio_id'],
      'local_${report?.id ?? title.hashCode}',
    );
    final duration = asInt(payload['duration_sec'], 180);
    return PlayerCard(
      title: title,
      durationSec: duration,
      player: player,
      onStart: () =>
          onStartAudio?.call(audioId, report?.id ?? '', title, duration),
      onToggle: onToggleAudio ?? () {},
      onSeek: onSeekAudio ?? (_) {},
      onSpeed: onSpeed ?? () {},
    );
  }
}

class _InstitutionModule extends StatelessWidget {
  const _InstitutionModule({required this.payload, required this.report});

  final JsonMap payload;
  final ReportDetail? report;

  @override
  Widget build(BuildContext context) {
    final name = asString(payload['name_cn'], report?.institution.nameCn ?? '');
    return Row(
      children: [
        const Icon(Icons.account_balance_outlined, color: WiseColors.primary),
        const SizedBox(width: WiseSpacing.x2),
        Expanded(
          child: Text(name, style: Theme.of(context).textTheme.bodyMedium),
        ),
        Text(
          '${asInt(payload['report_count'], report?.institution.reportCount ?? 0)} 份',
          style: Theme.of(context).textTheme.bodySmall,
        ),
      ],
    );
  }
}

class _SectionsModule extends StatelessWidget {
  const _SectionsModule({required this.payload, required this.compact});

  final JsonMap payload;
  final bool compact;

  @override
  Widget build(BuildContext context) {
    final summary = asString(
      payload['preview_summary'],
      asString(payload['intro_cn']),
    );
    final sections = asMapList(payload['sections']);
    if (compact) return _Preview(payload: payload);
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        if (summary.isNotEmpty)
          Text(summary, style: Theme.of(context).textTheme.bodyMedium),
        for (final section in sections) ...[
          const SizedBox(height: WiseSpacing.x3),
          Text(
            asString(section['heading']),
            style: Theme.of(context).textTheme.titleMedium,
          ),
          const SizedBox(height: WiseSpacing.x1),
          Text(
            asString(section['body']),
            style: Theme.of(context).textTheme.bodyMedium,
          ),
        ],
      ],
    );
  }
}

class _KeyDataModule extends StatelessWidget {
  const _KeyDataModule({required this.payload, required this.compact});

  final JsonMap payload;
  final bool compact;

  @override
  Widget build(BuildContext context) {
    if (compact) return _Preview(payload: payload);
    final rows = asMapList(payload['rows']);
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        for (final row in rows)
          Padding(
            padding: const EdgeInsets.only(bottom: WiseSpacing.x4),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  asString(row['metric']),
                  style: Theme.of(context).textTheme.titleMedium,
                ),
                const SizedBox(height: WiseSpacing.x1),
                Text(
                  _valueWithUnit(row),
                  style: Theme.of(context).textTheme.bodyLarge,
                ),
                if (asString(
                  row['judgment'],
                  asString(row['importance']),
                ).isNotEmpty) ...[
                  const SizedBox(height: WiseSpacing.x1),
                  Text(
                    asString(row['judgment'], asString(row['importance'])),
                    style: Theme.of(context).textTheme.bodyMedium,
                  ),
                ],
                if (asString(row['importance']).isNotEmpty &&
                    asString(row['importance']) !=
                        asString(row['judgment'])) ...[
                  const SizedBox(height: WiseSpacing.x1),
                  Text(
                    asString(row['importance']),
                    style: Theme.of(context).textTheme.bodySmall,
                  ),
                ],
              ],
            ),
          ),
      ],
    );
  }
}

class _TimelineModule extends StatelessWidget {
  const _TimelineModule({required this.payload, required this.compact});

  final JsonMap payload;
  final bool compact;

  @override
  Widget build(BuildContext context) {
    if (compact) return _Preview(payload: payload);
    final events = asMapList(payload['events']);
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        for (final event in events)
          Padding(
            padding: const EdgeInsets.only(bottom: WiseSpacing.x4),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                if (asString(event['date']).isNotEmpty)
                  Text(
                    asString(event['date']),
                    style: Theme.of(
                      context,
                    ).textTheme.labelSmall?.copyWith(color: WiseColors.primary),
                  ),
                const SizedBox(height: WiseSpacing.x1),
                Text(
                  asString(event['event']),
                  style: Theme.of(context).textTheme.titleMedium,
                ),
                const SizedBox(height: WiseSpacing.x1),
                Text(
                  asString(event['impact']),
                  style: Theme.of(context).textTheme.bodyMedium,
                ),
              ],
            ),
          ),
      ],
    );
  }
}

class _StudyGuideModule extends StatelessWidget {
  const _StudyGuideModule({required this.payload, required this.compact});

  final JsonMap payload;
  final bool compact;

  @override
  Widget build(BuildContext context) {
    if (compact) return _Preview(payload: payload);
    final faqs = asMapList(payload['faq_items']);
    final glossary = asMapList(payload['glossary']);
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        if (asString(payload['intro_cn']).isNotEmpty)
          Text(
            asString(payload['intro_cn']),
            style: Theme.of(context).textTheme.bodyMedium,
          ),
        for (final item in faqs)
          ExpansionTile(
            tilePadding: EdgeInsets.zero,
            title: Text(asString(item['question'])),
            children: [
              Align(
                alignment: Alignment.centerLeft,
                child: Text(
                  asString(item['answer']),
                  style: Theme.of(context).textTheme.bodyMedium,
                ),
              ),
            ],
          ),
        if (glossary.isNotEmpty) ...[
          const SizedBox(height: WiseSpacing.x3),
          Wrap(
            spacing: WiseSpacing.x2,
            runSpacing: WiseSpacing.x2,
            children: [
              for (final item in glossary)
                AppBadge(
                  text:
                      '${asString(item['term'])}: ${asString(item['definition'])}',
                ),
            ],
          ),
        ],
      ],
    );
  }
}

class _StructureGraphModule extends StatelessWidget {
  const _StructureGraphModule({required this.payload, required this.compact});

  final JsonMap payload;
  final bool compact;

  @override
  Widget build(BuildContext context) {
    if (compact) return _Preview(payload: payload);
    final nodes = asMapList(payload['nodes']);
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Text(
          asString(payload['root']),
          style: Theme.of(context).textTheme.titleMedium,
        ),
        const SizedBox(height: WiseSpacing.x3),
        for (final node in nodes)
          Padding(
            padding: const EdgeInsets.only(bottom: WiseSpacing.x4),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  asString(node['label']),
                  style: Theme.of(context).textTheme.titleMedium,
                ),
                const SizedBox(height: WiseSpacing.x1),
                for (final child in asStringList(node['children']))
                  Padding(
                    padding: const EdgeInsets.only(bottom: WiseSpacing.x1),
                    child: Text(
                      child,
                      style: Theme.of(context).textTheme.bodyMedium,
                    ),
                  ),
              ],
            ),
          ),
      ],
    );
  }
}

class _RelatedSourcesModule extends StatelessWidget {
  const _RelatedSourcesModule({required this.payload, required this.compact});

  final JsonMap payload;
  final bool compact;

  @override
  Widget build(BuildContext context) {
    final items = asMapList(payload['items'] ?? payload['sources']);
    if (items.isEmpty) return _Preview(payload: payload);
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        for (final item in items)
          Padding(
            padding: const EdgeInsets.only(bottom: WiseSpacing.x4),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  asString(item['title']),
                  style: Theme.of(context).textTheme.titleMedium,
                ),
                const SizedBox(height: WiseSpacing.x1),
                Text(
                  asString(item['summary_cn'], asString(item['source_name'])),
                  style: Theme.of(context).textTheme.bodyMedium,
                ),
              ],
            ),
          ),
      ],
    );
  }
}

class _DifferentiatedViewModule extends StatelessWidget {
  const _DifferentiatedViewModule({
    required this.payload,
    required this.compact,
  });

  final JsonMap payload;
  final bool compact;

  @override
  Widget build(BuildContext context) {
    if (compact) return _Preview(payload: payload);
    final items = asMapList(payload['divergences']);
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        for (final item in items)
          Padding(
            padding: const EdgeInsets.only(bottom: WiseSpacing.x4),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  asString(item['topic']),
                  style: Theme.of(context).textTheme.titleMedium,
                ),
                const SizedBox(height: WiseSpacing.x2),
                if (asString(item['consensus_view']).isNotEmpty) ...[
                  Text(
                    '常见观点',
                    style: Theme.of(
                      context,
                    ).textTheme.labelSmall?.copyWith(color: WiseColors.ink700),
                  ),
                  const SizedBox(height: WiseSpacing.x1),
                  Text(
                    asString(item['consensus_view']),
                    style: Theme.of(context).textTheme.bodyMedium,
                  ),
                  const SizedBox(height: WiseSpacing.x2),
                ],
                if (asString(item['report_position']).isNotEmpty) ...[
                  Text(
                    '报告观点',
                    style: Theme.of(
                      context,
                    ).textTheme.labelSmall?.copyWith(color: WiseColors.primary),
                  ),
                  const SizedBox(height: WiseSpacing.x1),
                  Text(
                    asString(item['report_position']),
                    style: Theme.of(context).textTheme.bodyMedium,
                  ),
                ],
              ],
            ),
          ),
      ],
    );
  }
}

class _WeaknessesModule extends StatelessWidget {
  const _WeaknessesModule({required this.payload, required this.compact});

  final JsonMap payload;
  final bool compact;

  @override
  Widget build(BuildContext context) {
    if (compact) return _Preview(payload: payload);
    final items = asMapList(payload['items']);
    final verificationNotes = asStringList(payload['verification_notes']);
    final counterEvidence = {
      for (final item in items)
        if (asString(item['counter_evidence']).isNotEmpty)
          asString(item['counter_evidence']),
    }.toList();
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        if (asString(payload['disclaimer_cn']).isNotEmpty)
          Text(
            asString(payload['disclaimer_cn']),
            style: Theme.of(context).textTheme.bodySmall,
          ),
        for (final item in items)
          Padding(
            padding: const EdgeInsets.only(
              top: WiseSpacing.x3,
              bottom: WiseSpacing.x2,
            ),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  asString(item['topic']),
                  style: Theme.of(context).textTheme.titleMedium,
                ),
                const SizedBox(height: WiseSpacing.x1),
                Text(
                  asString(item['weakness']),
                  style: Theme.of(context).textTheme.bodyMedium,
                ),
              ],
            ),
          ),
        if (verificationNotes.isNotEmpty || counterEvidence.isNotEmpty) ...[
          const SizedBox(height: WiseSpacing.x2),
          DecoratedBox(
            decoration: BoxDecoration(
              color: const Color(0x109A6500),
              borderRadius: BorderRadius.circular(WiseRadius.sm),
            ),
            child: Padding(
              padding: const EdgeInsets.all(WiseSpacing.x3),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    '需要继续验证',
                    style: Theme.of(
                      context,
                    ).textTheme.labelSmall?.copyWith(color: WiseColors.warning),
                  ),
                  const SizedBox(height: WiseSpacing.x1),
                  for (final note
                      in verificationNotes.isNotEmpty
                          ? verificationNotes
                          : counterEvidence)
                    Padding(
                      padding: const EdgeInsets.only(bottom: WiseSpacing.x1),
                      child: Text(
                        note,
                        style: Theme.of(context).textTheme.bodySmall,
                      ),
                    ),
                ],
              ),
            ),
          ),
        ],
      ],
    );
  }
}

class _Preview extends StatelessWidget {
  const _Preview({required this.payload});

  final JsonMap payload;

  @override
  Widget build(BuildContext context) {
    final headline = asString(
      payload['preview_headline'],
      asString(payload['preview_summary'], asString(payload['root'])),
    );
    final highlights = asStringList(payload['highlights']);
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        if (headline.isNotEmpty)
          Text(headline, style: Theme.of(context).textTheme.bodyMedium),
        for (final item in highlights.take(3))
          Padding(
            padding: const EdgeInsets.only(top: WiseSpacing.x1),
            child: Text(
              '• $item',
              style: Theme.of(context).textTheme.bodySmall,
            ),
          ),
      ],
    );
  }
}

class _TextLines extends StatelessWidget {
  const _TextLines({required this.payload});

  final JsonMap payload;

  @override
  Widget build(BuildContext context) {
    final values = payload.entries
        .where(
          (entry) => entry.value != null && entry.value.toString().isNotEmpty,
        )
        .map((entry) => '${entry.key}: ${entry.value}')
        .take(5)
        .join('\n');
    return Text(
      values.isEmpty ? '该模块暂无可展示内容。' : values,
      style: Theme.of(context).textTheme.bodyMedium,
    );
  }
}

class _FallbackModule extends StatelessWidget {
  const _FallbackModule({required this.type, required this.payload});

  final String type;
  final JsonMap payload;

  @override
  Widget build(BuildContext context) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        AppBadge(text: '未知模块：$type', kind: BadgeKind.warning),
        const SizedBox(height: WiseSpacing.x2),
        _Preview(payload: payload),
      ],
    );
  }
}

String _kindLabel(String kind) => switch (kind) {
  'view' => '观点',
  'number' => '数字',
  'risk' => '风险',
  _ => '要点',
};

BadgeKind _kindBadge(String kind) => switch (kind) {
  'risk' => BadgeKind.warning,
  'number' => BadgeKind.audio,
  _ => BadgeKind.brand,
};

String _valueWithUnit(JsonMap row) {
  final value = asString(row['value']);
  final unit = asString(row['unit']);
  if (unit.isEmpty) return value;
  return '$value $unit';
}

String _institutionTypeLabel(String value) => switch (value) {
  'international_org' => '国际组织',
  'official' => '官方机构',
  'industry_org' => '行业组织',
  'asset_manager' => '资管机构',
  'bank_research' => '银行研究',
  'partner' => '合作机构',
  _ => value,
};