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_buttons.dart';
import '../../widgets/app_card.dart';
import '../../widgets/badges.dart';
import '../../widgets/mini_player.dart';
import '../../widgets/sheets.dart';
import '../../widgets/states.dart';
import 'modules/renderer_registry.dart';

class ReportDetailPage extends StatefulWidget {
  const ReportDetailPage({
    required this.reportId,
    required this.dataSource,
    this.player = const PlayerStateModel(),
    this.onStartAudio,
    this.onToggleAudio,
    this.onSeekAudio,
    this.onSpeed,
    super.key,
  });

  final String reportId;
  final ReportDataSource dataSource;
  final PlayerStateModel player;
  final void Function(
    String audioId,
    String reportId,
    String title,
    int durationSec,
  )?
  onStartAudio;
  final VoidCallback? onToggleAudio;
  final void Function(int delta)? onSeekAudio;
  final VoidCallback? onSpeed;

  @override
  State<ReportDetailPage> createState() => _ReportDetailPageState();
}

class _ReportDetailPageState extends State<ReportDetailPage> {
  static const registry = ModuleRendererRegistry();
  late Future<ReportDetail> future = widget.dataSource.reportDetail(
    widget.reportId,
  );

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('研报详情')),
      body: FutureBuilder<ReportDetail>(
        future: future,
        builder: (context, snapshot) {
          if (snapshot.connectionState != ConnectionState.done) {
            return const LoadingState();
          }
          if (snapshot.hasError) {
            return ErrorState(
              message: snapshot.error.toString(),
              onRetry: () => setState(
                () => future = widget.dataSource.reportDetail(widget.reportId),
              ),
            );
          }
          final detail = snapshot.data!;
          return ListView(
            padding: const EdgeInsets.all(WiseSpacing.x4),
            children: [
              AppCard(
                color: WiseColors.secondary200,
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Wrap(
                      spacing: WiseSpacing.x2,
                      runSpacing: WiseSpacing.x2,
                      children: [
                        AppBadge(
                          text: detail.interpretationLabel,
                          kind: BadgeKind.brand,
                        ),
                        if (detail.hasAudio)
                          const AppBadge(
                            text: '音频',
                            icon: Icons.graphic_eq,
                            kind: BadgeKind.audio,
                          ),
                        AppBadge(
                          text: asString(detail.source['source_tier']),
                          icon: Icons.verified_outlined,
                          kind: BadgeKind.tier,
                        ),
                      ],
                    ),
                    const SizedBox(height: WiseSpacing.x3),
                    Text(
                      detail.titleCn,
                      maxLines: 3,
                      overflow: TextOverflow.ellipsis,
                      style: Theme.of(context).textTheme.headlineSmall,
                    ),
                    if (detail.oneLiner.isNotEmpty) ...[
                      const SizedBox(height: WiseSpacing.x2),
                      Text(
                        detail.oneLiner,
                        style: Theme.of(context).textTheme.bodyMedium,
                      ),
                    ],
                    const SizedBox(height: WiseSpacing.x3),
                    Text(
                      '${detail.institution.nameCn} · ${formatDate(detail.releasedAt)}',
                      style: Theme.of(context).textTheme.bodySmall,
                    ),
                  ],
                ),
              ),
              const SizedBox(height: WiseSpacing.x4),
              _ActionBar(detail: detail),
              const SizedBox(height: WiseSpacing.x4),
              _Toc(modules: detail.modules),
              const SizedBox(height: WiseSpacing.x4),
              for (final module in detail.modules) ...[
                registry.card(
                  context: context,
                  module: module,
                  report: detail,
                  dataSource: widget.dataSource,
                  player: widget.player,
                  onStartAudio: widget.onStartAudio,
                  onToggleAudio: widget.onToggleAudio,
                  onSeekAudio: widget.onSeekAudio,
                  onSpeed: widget.onSpeed,
                ),
                const SizedBox(height: WiseSpacing.x4),
              ],
            ],
          );
        },
      ),
    );
  }
}

class _ActionBar extends StatelessWidget {
  const _ActionBar({required this.detail});

  final ReportDetail detail;

  @override
  Widget build(BuildContext context) {
    return Row(
      children: [
        Expanded(
          child: AppButton(
            label: '收藏',
            icon: Icons.favorite_border,
            kind: AppButtonKind.ghost,
            onPressed: () => showLoginSheet(context, reason: '登录后保存到你的收藏'),
          ),
        ),
        const SizedBox(width: WiseSpacing.x2),
        Expanded(
          child: AppButton(
            label: '原文',
            icon: Icons.open_in_new,
            kind: AppButtonKind.ghost,
            onPressed: () => showOutboundSheet(context, title: detail.titleCn),
          ),
        ),
      ],
    );
  }
}

class _Toc extends StatelessWidget {
  const _Toc({required this.modules});

  final List<DisplayModule> modules;

  @override
  Widget build(BuildContext context) {
    if (modules.isEmpty) return const SizedBox.shrink();
    return SingleChildScrollView(
      scrollDirection: Axis.horizontal,
      child: Row(
        children: [
          for (final module in modules)
            Padding(
              padding: const EdgeInsets.only(right: WiseSpacing.x2),
              child: AppBadge(text: module.titleCn, kind: BadgeKind.brand),
            ),
        ],
      ),
    );
  }
}