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

import '../../../core/player/feed_player_pool.dart';
import '../../../core/theme/app_theme.dart';
import '../../../models/video_item.dart';
import '../../../providers/auth_provider.dart';
import 'feed_overlays.dart';
import 'interaction_bar.dart';
import 'video_info_section.dart';
import 'video_player_view.dart';

/// Feed 单页：播放器 + 手势层 + 互动栏 + 信息区 + 双击爱心动画
/// 手势（《01-开发文档》5.3）：单击暂停/继续，双击点赞，长按弹倍速/分享
class FeedVideoPage extends ConsumerStatefulWidget {
  const FeedVideoPage({
    super.key,
    required this.item,
    required this.slotIndex,
    required this.pool,
    required this.isCurrent,
    required this.onLike,
    this.onFavorite,
    this.onComment,
  });

  final VideoItem item;
  final int slotIndex;
  final FeedPlayerPool pool;
  final bool isCurrent;
  final void Function(int videoId) onLike;
  final void Function(int videoId)? onFavorite;
  final void Function(VideoItem item)? onComment;

  @override
  ConsumerState<FeedVideoPage> createState() => _FeedVideoPageState();
}

class _FeedVideoPageState extends ConsumerState<FeedVideoPage> {
  int _likeBurstTrigger = 0;

  static const _rates = [1.0, 1.25, 1.5, 2.0];

  void _onDoubleTap() {
    if (!ref.read(authProvider).isLoggedIn) {
      context.go('/login');
      return;
    }
    setState(() => _likeBurstTrigger++);
    if (!widget.item.isLiked) widget.onLike(widget.item.videoId);
  }

  void _onLongPress() {
    showModalBottomSheet<void>(
      context: context,
      backgroundColor: Colors.white,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
      ),
      builder: (_) {
        final currentRate = widget.pool.slotAt(widget.slotIndex).player.state.rate;
        return SafeArea(
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              ListTile(
                leading: const Icon(Icons.speed, color: AppColors.primary),
                title: const Text('倍速播放'),
                subtitle: Text('当前 ${currentRate.toStringAsFixed(2)}x'),
                onTap: () {
                  Navigator.of(context).pop();
                  _showRateSheet();
                },
              ),
              const Divider(height: 1),
              ListTile(
                leading: const Icon(Icons.share_outlined),
                title: const Text('分享'),
                onTap: () {
                  Navigator.of(context).pop();
                  _share();
                },
              ),
              const SizedBox(height: 8),
            ],
          ),
        );
      },
    );
  }

  void _showRateSheet() {
    final currentRate = widget.pool.slotAt(widget.slotIndex).player.state.rate;
    showModalBottomSheet<void>(
      context: context,
      backgroundColor: Colors.white,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
      ),
      builder: (_) => SafeArea(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            for (final r in _rates)
              ListTile(
                title: Center(child: Text('${r}x')),
                trailing: (currentRate - r).abs() < 0.01
                    ? const Icon(Icons.check, color: AppColors.primary)
                    : null,
                onTap: () {
                  widget.pool.slotAt(widget.slotIndex).player.setRate(r);
                  Navigator.of(context).pop();
                },
              ),
            const SizedBox(height: 8),
          ],
        ),
      ),
    );
  }

  Future<void> _share() async {
    final text = '${widget.item.title}\n${widget.item.videoUrl}';
    await Share.share(text, subject: widget.item.title);
  }

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      behavior: HitTestBehavior.opaque,
      onTap: widget.pool.toggleCurrent,
      onDoubleTap: _onDoubleTap,
      onLongPress: _onLongPress,
      child: Container(
        color: Colors.black,
        child: Stack(
          fit: StackFit.expand,
          children: [
            // 底部渐变（提升文字可读性）
            const Positioned(
              left: 0, right: 0, bottom: 0, height: 160,
              child: IgnorePointer(
                child: DecoratedBox(
                  decoration: BoxDecoration(
                    gradient: LinearGradient(
                      begin: Alignment.topCenter,
                      end: Alignment.bottomCenter,
                      colors: [Colors.transparent, Colors.black54],
                    ),
                  ),
                ),
              ),
            ),

            // 播放器（含抖音风格细进度条）
            VideoPlayerView(
              pool: widget.pool,
              slotIndex: widget.slotIndex,
              coverUrl: widget.item.coverUrl,
              playing: widget.isCurrent && widget.pool.isCurrentPlaying,
            ),

            // 双击爱心动画
            IgnorePointer(child: LikeBurst(trigger: _likeBurstTrigger)),

            // 右侧互动栏（头像/点赞/评论/收藏 — 分享已移至长按菜单）
            Positioned(
              right: 8, bottom: 96,
              child: InteractionBar(
                item: widget.item,
                onLike: widget.onLike,
                onFavorite: widget.onFavorite,
                onComment: widget.onComment,
              ),
            ),

            // 左下信息区
            Positioned(
              left: 12, right: 88, bottom: 24,
              child: VideoInfoSection(item: widget.item),
            ),
          ],
        ),
      ),
    );
  }
}