import "dart:async";
import "dart:io";

import "package:flutter/cupertino.dart";
import "package:flutter/material.dart";
import "package:logging/logging.dart";
import "package:native_video_player/native_video_player.dart";
import "package:photos/core/constants.dart";
import "package:photos/core/event_bus.dart";
import "package:photos/events/file_swipe_lock_event.dart";
// import "package:photos/events/pause_video_event.dart";
import "package:photos/generated/l10n.dart";
import "package:photos/models/file/extensions/file_props.dart";
import "package:photos/models/file/file.dart";
import "package:photos/services/files_service.dart";
import "package:photos/theme/colors.dart";
import "package:photos/theme/ente_theme.dart";
import "package:photos/ui/actions/file/file_actions.dart";
import "package:photos/ui/viewer/file/native_video_player_controls/play_pause_button.dart";
import "package:photos/ui/viewer/file/native_video_player_controls/seek_bar.dart";
import "package:photos/ui/viewer/file/thumbnail_widget.dart";
import "package:photos/utils/dialog_util.dart";
import "package:photos/utils/exif_util.dart";
import "package:photos/utils/file_util.dart";
import "package:photos/utils/toast_util.dart";

class VideoWidgetNative extends StatefulWidget {
  final EnteFile file;
  final String? tagPrefix;
  final Function(bool)? playbackCallback;
  const VideoWidgetNative(
    this.file, {
    this.tagPrefix,
    this.playbackCallback,
    super.key,
  });

  @override
  State<VideoWidgetNative> createState() => _VideoWidgetNativeState();
}

class _VideoWidgetNativeState extends State<VideoWidgetNative>
    with WidgetsBindingObserver {
  final Logger _logger = Logger("VideoWidgetNew");
  static const verticalMargin = 72.0;
  // late final player = Player();
  // VideoController? controller;
  final _progressNotifier = ValueNotifier<double?>(null);
  // late StreamSubscription<bool> playingStreamSubscription;
  bool _isAppInFG = true;
  // late StreamSubscription<PauseVideoEvent> pauseVideoSubscription;
  bool _isFileSwipeLocked = false;
  late final StreamSubscription<FileSwipeLockEvent>
      _fileSwipeLockEventSubscription;

  NativeVideoPlayerController? _controller;
  String? _filePath;

  String? duration;
  double? aspectRatio;
  final _isPlaybackReady = ValueNotifier(false);

  @override
  void initState() {
    _logger.info(
      'initState for ${widget.file.generatedID} with tag ${widget.file.tag} and name ${widget.file.displayName}',
    );
    super.initState();
    WidgetsBinding.instance.addObserver(this);
    if (widget.file.isRemoteFile) {
      _loadNetworkVideo();
      _setFileSizeIfNull();
    } else if (widget.file.isSharedMediaToAppSandbox) {
      final localFile = File(getSharedMediaFilePath(widget.file));
      if (localFile.existsSync()) {
        _setFilePathForNativePlayer(localFile.path);
      } else if (widget.file.uploadedFileID != null) {
        _loadNetworkVideo();
      }
    } else {
      widget.file.getAsset.then((asset) async {
        if (asset == null || !(await asset.exists)) {
          if (widget.file.uploadedFileID != null) {
            _loadNetworkVideo();
          }
        } else {
          // ignore: unawaited_futures
          getFile(widget.file, isOrigin: true).then((file) {
            _setFilePathForNativePlayer(file!.path);
            file.delete();
          });
        }
      });
    }
    // playingStreamSubscription = player.stream.playing.listen((event) {
    //   if (widget.playbackCallback != null && mounted) {
    //     widget.playbackCallback!(event);
    //   }
    // });

    // pauseVideoSubscription = Bus.instance.on<PauseVideoEvent>().listen((event) {
    //   player.pause();
    // });
    _fileSwipeLockEventSubscription =
        Bus.instance.on<FileSwipeLockEvent>().listen((event) {
      setState(() {
        _isFileSwipeLocked = event.shouldSwipeLock;
      });
    });
  }

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    if (state == AppLifecycleState.resumed) {
      _isAppInFG = true;
    } else {
      _isAppInFG = false;
    }
  }

  @override
  void dispose() {
    _fileSwipeLockEventSubscription.cancel();
    // pauseVideoSubscription.cancel();
    removeCallBack(widget.file);
    _progressNotifier.dispose();
    WidgetsBinding.instance.removeObserver(this);
    // playingStreamSubscription.cancel();
    // player.dispose();

    _controller?.onPlaybackEnded.removeListener(_onPlaybackEnded);
    _controller?.onPlaybackReady.removeListener(_onPlaybackReady);
    _isPlaybackReady.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Hero(
      tag: widget.tagPrefix! + widget.file.tag,
      child: GestureDetector(
        onVerticalDragUpdate: _isFileSwipeLocked
            ? null
            : (d) => {
                  if (d.delta.dy > dragSensitivity)
                    {
                      Navigator.of(context).pop(),
                    }
                  else if (d.delta.dy < (dragSensitivity * -1))
                    {
                      showDetailsSheet(context, widget.file),
                    },
                },
        child: _filePath == null
            ? _getLoadingWidget()
            : Stack(
                children: [
                  Center(
                    child: AspectRatio(
                      aspectRatio: aspectRatio ?? 1,
                      child: NativeVideoPlayerView(
                        onViewReady: _initializeController,
                      ),
                    ),
                  ),
                  Positioned.fill(
                    child: Center(
                      child: ValueListenableBuilder(
                        builder: (BuildContext context, bool value, _) {
                          return value
                              ? PlayPauseButton(_controller)
                              : const SizedBox();
                        },
                        valueListenable: _isPlaybackReady,
                      ),
                    ),
                  ),
                  Positioned(
                    bottom: verticalMargin,
                    right: 0,
                    left: 0,
                    child: ValueListenableBuilder(
                      builder: (BuildContext context, bool value, _) {
                        return value
                            ? Padding(
                                padding:
                                    const EdgeInsets.symmetric(horizontal: 8),
                                child: Container(
                                  padding:
                                      const EdgeInsets.fromLTRB(16, 4, 16, 4),
                                  decoration: BoxDecoration(
                                    color: Colors.black.withOpacity(0.3),
                                    borderRadius: const BorderRadius.all(
                                      Radius.circular(8),
                                    ),
                                    border: Border.all(
                                      color: getEnteColorScheme(context)
                                          .strokeFaint,
                                      width: 1,
                                    ),
                                  ),
                                  child: Row(
                                    children: [
                                      AnimatedSize(
                                        duration: const Duration(seconds: 5),
                                        curve: Curves.easeInOut,
                                        child: ValueListenableBuilder(
                                          valueListenable: _controller!
                                              .onPlaybackPositionChanged,
                                          builder: (
                                            BuildContext context,
                                            int value,
                                            _,
                                          ) {
                                            return Text(
                                              secondsToDuration(value),
                                              style: getEnteTextTheme(context)
                                                  .mini
                                                  .copyWith(
                                                    color: textBaseDark,
                                                  ),
                                            );
                                          },
                                        ),
                                      ),
                                      Expanded(
                                        child: SeekBar(
                                          _controller!,
                                          _durationToSeconds(duration),
                                        ),
                                      ),
                                      Text(
                                        duration ?? "0:00",
                                        style: getEnteTextTheme(context)
                                            .mini
                                            .copyWith(
                                              color: textBaseDark,
                                            ),
                                      ),
                                    ],
                                  ),
                                ),
                              )
                            : const SizedBox();
                      },
                      valueListenable: _isPlaybackReady,
                    ),
                  ),
                ],
              ),
      ),
    );
  }

  String secondsToDuration(int totalSeconds) {
    final hours = totalSeconds ~/ 3600;
    final minutes = (totalSeconds % 3600) ~/ 60;
    final seconds = totalSeconds % 60;

    if (hours > 0) {
      return '${hours.toString().padLeft(1, '0')}:${minutes.toString().padLeft(2, '0')}:${seconds.toString().padLeft(2, '0')}';
    } else {
      return '${minutes.toString().padLeft(1, '0')}:${seconds.toString().padLeft(2, '0')}';
    }
  }

  int? _durationToSeconds(String? duration) {
    if (duration == null) {
      _logger.warning("Duration is null");
      return null;
    }
    final parts = duration.split(':');
    int seconds = 0;

    if (parts.length == 3) {
      // Format: "h:mm:ss"
      seconds += int.parse(parts[0]) * 3600; // Hours to seconds
      seconds += int.parse(parts[1]) * 60; // Minutes to seconds
      seconds += int.parse(parts[2]); // Seconds
    } else if (parts.length == 2) {
      // Format: "m:ss"
      seconds += int.parse(parts[0]) * 60; // Minutes to seconds
      seconds += int.parse(parts[1]); // Seconds
    } else {
      throw FormatException('Invalid duration format: $duration');
    }

    return seconds;
  }

  Future<void> _initializeController(
    NativeVideoPlayerController controller,
  ) async {
    _logger.info("initializing native video player controller");
    _controller = controller;

    controller.onPlaybackEnded.addListener(_onPlaybackEnded);

    controller.onPlaybackReady.addListener(_onPlaybackReady);

    final videoSource = await VideoSource.init(
      path: _filePath!,

      //Check when to set this to VideoSourceType.asset
      type: VideoSourceType.file,
    );
    await controller.loadVideoSource(videoSource);
  }

  Future<void> _onPlaybackReady() async {
    await _controller!.play();
    Future.delayed(const Duration(seconds: 2), () {
      _controller!.setVolume(1);
    });
    _isPlaybackReady.value = true;
  }

  void _onPlaybackEnded() {
    _controller?.play();
  }

  void _loadNetworkVideo() {
    getFileFromServer(
      widget.file,
      progressCallback: (count, total) {
        if (!mounted) {
          return;
        }
        _progressNotifier.value = count / (widget.file.fileSize ?? total);
        if (_progressNotifier.value == 1) {
          if (mounted) {
            showShortToast(context, S.of(context).decryptingVideo);
          }
        }
      },
    ).then((file) {
      if (file != null) {
        _setFilePathForNativePlayer(file.path);
      }
    }).onError((error, stackTrace) {
      showErrorDialog(context, "Error", S.of(context).failedToDownloadVideo);
    });
  }

  void _setFileSizeIfNull() {
    if (widget.file.fileSize == null && widget.file.canEditMetaInfo) {
      FilesService.instance
          .getFileSize(widget.file.uploadedFileID!)
          .then((value) {
        widget.file.fileSize = value;
        if (mounted) {
          setState(() {});
        }
      });
    }
  }

  Widget _getLoadingWidget() {
    return Stack(
      children: [
        _getThumbnail(),
        Container(
          color: Colors.black12,
          constraints: const BoxConstraints.expand(),
        ),
        Center(
          child: SizedBox.fromSize(
            size: const Size.square(20),
            child: ValueListenableBuilder(
              valueListenable: _progressNotifier,
              builder: (BuildContext context, double? progress, _) {
                return progress == null || progress == 1
                    ? const CupertinoActivityIndicator(
                        color: Colors.white,
                      )
                    : CircularProgressIndicator(
                        backgroundColor: Colors.black,
                        value: progress,
                        valueColor: const AlwaysStoppedAnimation<Color>(
                          Color.fromRGBO(45, 194, 98, 1.0),
                        ),
                      );
              },
            ),
          ),
        ),
      ],
    );
  }

  Widget _getThumbnail() {
    return Container(
      color: Colors.black,
      constraints: const BoxConstraints.expand(),
      child: ThumbnailWidget(
        widget.file,
        fit: BoxFit.contain,
      ),
    );
  }

  void _setFilePathForNativePlayer(String url) {
    if (mounted) {
      setState(() {
        _filePath = url;
      });
      _setAspectRatioFromVideoProps().then((_) {
        setState(() {});
      });
    }
  }

  Future<void> _setAspectRatioFromVideoProps() async {
    final videoProps = await getVideoPropsAsync(File(_filePath!));
    if (videoProps != null) {
      duration = videoProps.propData?["duration"];

      if (videoProps.width != null && videoProps.height != null) {
        if (videoProps.width != null && videoProps.height != 0) {
          aspectRatio = videoProps.width! / videoProps.height!;
        } else {
          _logger.info("Video props height or width is 0");
          aspectRatio = 1;
        }
      } else {
        _logger.info("Video props width and height are null");
        aspectRatio = 1;
      }
    } else {
      _logger.info("Video props are null");
      aspectRatio = 1;
    }
  }
}