import 'package:better_player_plus/better_player_plus.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:news_app/constant/size_res.dart';
import 'package:news_app/ui/video/video_play_item_widget.dart';
import 'package:news_app/util/log.util.dart';
import 'package:visibility_detector/visibility_detector.dart';
import 'package:fluttertoast/fluttertoast.dart';

import '../../model/video_new_model.dart';
import '../../provider/video_commend_provider.dart';

/// @author: bo.zeng
/// @email: cnhbwds@gmail.com
/// @date: 2025 2025/4/9 16:00
/// @description:
class VideoRecommendListPage extends ConsumerStatefulWidget {
  const VideoRecommendListPage({super.key});

  @override
  ConsumerState<VideoRecommendListPage> createState() =>
      _VideoRecommendListPageState();
}

final recommendListProvider =
    NotifierProvider<VideoRecommendProvider, List<VideoNewModel>>(() {
      return VideoRecommendProvider();
    });

// 全局共享的视频控制器
BetterPlayerController? globalVideoController;

class _VideoRecommendListPageState extends ConsumerState<VideoRecommendListPage>
    with AutomaticKeepAliveClientMixin {
  late final PageController _pageController;
  int _currentPageIndex = 0;
  String? _currentVideoUrl;
  String? _lastFailedVideoUrl; // 记录上次失败的视频URL
  int _consecutiveFailures = 0; // 连续失败计数

  @override
  void initState() {
    super.initState();
    _pageController = PageController();
    // 先获取视频数据
    ref.read(recommendListProvider.notifier).fetchRecommendVideos();
  }

  // 安全地执行控制器操作
  void _safeControllerOperation(VoidCallback operation) {
    if (!mounted) return;
    final controller = globalVideoController;
    if (controller == null) return;

    try {
      if (controller.isVideoInitialized() == true) {
        operation();
      }
    } catch (e) {
      consoleLog("Controller operation error: $e");
      // 控制器可能已被释放，重置为 null
      globalVideoController = null;
    }
  }

  void _playVideo(String url) {
    consoleLog('===== _playVideo called with URL: $url =====');
    if (!mounted) return;

    // 检查现有控制器是否可用（未释放且是同一视频）
    if (_currentVideoUrl == url && globalVideoController != null) {
      try {
        if (globalVideoController!.isVideoInitialized() == true) {
          _safeControllerOperation(() {
            globalVideoController!.play();
          });
          return;
        }
      } catch (e) {
        consoleLog("Controller check failed, creating new one: $e");
      }
    }

    _currentVideoUrl = url;

    // 释放旧控制器
    try {
      globalVideoController?.dispose();
    } catch (e) {
      consoleLog("Dispose old controller error: $e");
    }
    globalVideoController = null;

    consoleLog("Creating BetterPlayerDataSource with url: $url");

    // 创建数据源（与 video_detail_page 一致）
    // 对于m4v格式，使用other格式让ExoPlayer自动检测
    final dataSource = BetterPlayerDataSource(
      BetterPlayerDataSourceType.network,
      url,
      videoFormat: BetterPlayerVideoFormat.other, // 让ExoPlayer自动检测格式
      notificationConfiguration: BetterPlayerNotificationConfiguration(
        showNotification: false,
      ),
    );

    // 创建新控制器，宽度占满、高度自适应
    globalVideoController = BetterPlayerController(
      BetterPlayerConfiguration(
        autoPlay: true,
        looping: true,
        fit: BoxFit.fitWidth, // 宽度占满，高度自适应
        controlsConfiguration: const BetterPlayerControlsConfiguration(
          showControls: false,
        ),
        handleLifecycle: false,
        autoDetectFullscreenAspectRatio: false,
        // 尝试使用软件解码作为后备
        errorBuilder: (context, errorMessage) {
          consoleLog("GlobalVideoController errorBuilder: $errorMessage");
          return Center(
            child: Text(
              "视频加载失败",
              style: TextStyle(color: Colors.white, fontSize: 14),
            ),
          );
        },
      ),
      betterPlayerDataSource: dataSource,
    );

    consoleLog("BetterPlayerController created");

    // 先添加事件监听
    globalVideoController!.addEventsListener((event) {
      consoleLog("GlobalVideoController event: ${event.betterPlayerEventType}");
      if (event.betterPlayerEventType == BetterPlayerEventType.exception) {
        // 打印详细异常信息
        consoleLog("Video exception occurred");
        consoleLog("Exception parameters: ${event.parameters}");
        consoleLog("Exception all data: ${event.toString()}");

        // 检查是否是硬件解码器不支持的错误
        final exception = event.parameters?['exception']?.toString() ?? '';
        if (exception.contains('NO_EXCEEDS_CAPABILITIES') ||
            exception.contains('MediaCodecVideoRenderer error')) {
          consoleLog("Hardware decoder not supported for this video");

          // 显示提示并跳过该视频
          if (mounted && _consecutiveFailures < 3) {
            Fluttertoast.showToast(
              msg: "该视频格式暂不支持，自动跳过",
              toastLength: Toast.LENGTH_SHORT,
              gravity: ToastGravity.CENTER,
            );

            // 延迟后跳到下一个视频
            Future.delayed(const Duration(milliseconds: 800), () {
              if (mounted && _currentPageIndex < ref.read(recommendListProvider).length - 1) {
                _consecutiveFailures++;
                _pageController.animateToPage(
                  _currentPageIndex + 1,
                  duration: const Duration(milliseconds: 300),
                  curve: Curves.easeInOut,
                );
              } else {
                // 已经是最后一个视频了，重置计数
                _consecutiveFailures = 0;
              }
            });
          }
        }
      } else if (event.betterPlayerEventType == BetterPlayerEventType.play) {
        consoleLog("Video started playing");
        _consecutiveFailures = 0; // 播放成功，重置失败计数
      } else if (event.betterPlayerEventType == BetterPlayerEventType.bufferingStart) {
        consoleLog("Buffering started");
      } else if (event.betterPlayerEventType == BetterPlayerEventType.bufferingEnd) {
        consoleLog("Buffering ended");
      }
    });

    // 尝试播放
    Future.delayed(const Duration(milliseconds: 50), () {
      if (!mounted || globalVideoController == null) return;
      _safeControllerOperation(() {
        globalVideoController!.play();
      });
    });
  }

  @override
  void dispose() {
    _pageController.dispose();
    // 释放全局控制器
    try {
      globalVideoController?.dispose();
    } catch (e) {
      consoleLog("Dispose globalVideoController error: $e");
    }
    globalVideoController = null;
    super.dispose();
  }

  bool _isVisible = false;

  void _onVisibilityChanged(VisibilityInfo info) {
    if (!mounted) return;
    final visible = info.visibleFraction > 0.5;
    if (_isVisible != visible) {
      setState(() {
        _isVisible = visible;
      });
    }
    if (visible) {
      consoleLog("页面可见");
      // 页面重新可见时，恢复播放（仅在控制器已初始化时）
      try {
        if (globalVideoController != null &&
            globalVideoController!.isVideoInitialized() == true) {
          globalVideoController!.play();
        }
      } catch (e) {
        consoleLog("Visibility play error: $e");
      }
    } else {
      consoleLog("页面不可见");
      // 暂停播放
      try {
        if (globalVideoController != null &&
            globalVideoController!.isVideoInitialized() == true) {
          globalVideoController!.pause();
        }
      } catch (e) {
        consoleLog("Visibility pause error: $e");
      }
    }
  }

  void _onPageChanged(int index) {
    if (!mounted) return;
    setState(() {
      _currentPageIndex = index;
    });
    // 页面切换后，播放新视频
    final videos = ref.read(recommendListProvider);
    if (videos.isNotEmpty && index >= 0 && index < videos.length) {
      final url = videos[index].url;
      if (url != null && url.isNotEmpty) {
        _playVideo(url);
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    super.build(context);
    final videos = ref.watch(recommendListProvider);

    // 初始化控制器并播放第一个视频
    if (videos.isNotEmpty && globalVideoController == null) {
      WidgetsBinding.instance.addPostFrameCallback((_) {
        final firstUrl = videos.firstOrNull?.url;
        if (firstUrl != null && firstUrl.isNotEmpty && mounted) {
          _playVideo(firstUrl);
        }
      });
    }

    // 视频列表为空时显示加载状态
    if (videos.isEmpty) {
      return const Center(
        child: CircularProgressIndicator(),
      );
    }

    return VisibilityDetector(
      key: const Key("value"),
      onVisibilityChanged: _onVisibilityChanged,
      child: Padding(
        padding: EdgeInsets.symmetric(
          horizontal: horizontalPadding,
          vertical: horizontalPadding,
        ),
        child: PageView.builder(
          controller: _pageController,
          onPageChanged: _onPageChanged,
          scrollDirection: Axis.vertical,
          itemCount: videos.length,
          itemBuilder: (context, index) {
            // 添加边界检查
            if (index < 0 || index >= videos.length) {
              return const SizedBox.shrink();
            }
            final item = videos[index];
            return VideoPlayItemWidget(
              key: ValueKey("video_${item.contentId ?? index}"),
              item: item,
              isActive: _isVisible && _currentPageIndex == index,
              index: index,
            );
          },
        ),
      ),
    );
  }

  @override
  bool get wantKeepAlive => true;
}