import 'package:flutter/material.dart';

import '../../data/api/report_data_source.dart';
import '../../data/models/models.dart';
import '../../routing/app_routes.dart';
import '../../theme/wise_tokens.dart';
import '../../widgets/badges.dart';
import '../../widgets/mini_player.dart';
import '../../widgets/states.dart';
import '../shared/report_card_widget.dart';

class FeedPage extends StatefulWidget {
  const FeedPage({
    required this.dataSource,
    required this.onPlay,
    this.player = const PlayerStateModel(),
    this.onStartModuleAudio,
    this.onToggleAudio,
    this.onSeekAudio,
    this.onSpeed,
    super.key,
  });

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

  @override
  State<FeedPage> createState() => _FeedPageState();
}

class _FeedPageState extends State<FeedPage> {
  String topic = '全部';
  late Future<List<ReportCardModel>> future = widget.dataSource.recommended();

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<List<ReportCardModel>>(
      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.recommended()));
        final items = snapshot.data ?? const [];
        final topics = ['全部', ...{for (final item in items) ...item.topics}];
        final visible = topic == '全部' ? items : items.where((item) => item.topics.contains(topic)).toList();
        if (items.isEmpty) return const EmptyState(title: '暂无可推荐的研报解读', message: '稍后再来看看最新内容');
        return ListView(
          padding: const EdgeInsets.all(WiseSpacing.x4),
          children: [
            SingleChildScrollView(
              scrollDirection: Axis.horizontal,
              child: Row(
                children: [
                  for (final t in topics)
                    Padding(
                      padding: const EdgeInsets.only(right: WiseSpacing.x2),
                      child: AppChip(label: t, selected: t == topic, onTap: () => setState(() => topic = t)),
                    ),
                ],
              ),
            ),
            const SizedBox(height: WiseSpacing.x3),
            if (visible.isEmpty)
              EmptyState(title: '暂无可推荐的研报解读', message: '换个主题，或去研报页看看全部内容', icon: Icons.filter_alt_off)
            else ...[
              ReportCardWidget(
                report: visible.first,
                hero: true,
                onTap: () => openReportDetail(
                  context,
                  widget.dataSource,
                  visible.first,
                  player: widget.player,
                  onStartAudio: widget.onStartModuleAudio,
                  onToggleAudio: widget.onToggleAudio,
                  onSeekAudio: widget.onSeekAudio,
                  onSpeed: widget.onSpeed,
                ),
                onPlayTap: () => playFromReport(widget.onPlay, visible.first),
              ),
              const SizedBox(height: WiseSpacing.x5),
              Text('最新解读', style: Theme.of(context).textTheme.titleMedium),
              const SizedBox(height: WiseSpacing.x3),
              for (final report in visible.skip(1)) ...[
                ReportCardWidget(
                  report: report,
                  onTap: () => openReportDetail(
                    context,
                    widget.dataSource,
                    report,
                    player: widget.player,
                    onStartAudio: widget.onStartModuleAudio,
                    onToggleAudio: widget.onToggleAudio,
                    onSeekAudio: widget.onSeekAudio,
                    onSpeed: widget.onSpeed,
                  ),
                  onPlayTap: () => playFromReport(widget.onPlay, report),
                ),
                const SizedBox(height: WiseSpacing.x3),
              ],
            ],
          ],
        );
      },
    );
  }

  void playFromReport(void Function(AudioItem item) onPlay, ReportCardModel report) {
    onPlay(
      AudioItem(
        audioId: 'local_${report.id}',
        reportId: report.id,
        titleCn: report.titleCn,
        reportTitleCn: report.titleCn,
        durationSec: 180,
        institution: report.institution,
      ),
    );
  }
}