import 'dart:io';

import 'package:PiliPlus/http/init.dart';
import 'package:PiliPlus/utils/download.dart';
import 'package:PiliPlus/utils/extension.dart';
import 'package:PiliPlus/utils/storage.dart';
import 'package:PiliPlus/utils/utils.dart';
import 'package:cached_network_image/cached_network_image.dart';
import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
import 'package:get/get.dart';
import 'package:media_kit/media_kit.dart';
import 'package:media_kit_video/media_kit_video.dart';
import 'package:path_provider/path_provider.dart';
import 'package:share_plus/share_plus.dart';
import 'package:status_bar_control/status_bar_control.dart';
import 'interactive_viewer_boundary.dart';
import 'interactive_viewer.dart' as custom;

/// https://github.com/qq326646683/interactiveviewer_gallery

/// Builds a carousel controlled by a [PageView] for the tweet media sources.
///
/// Used for showing a full screen view of the [TweetMedia] sources.
///
/// The sources can be panned and zoomed interactively using an
/// [InteractiveViewer].
/// An [InteractiveViewerBoundary] is used to detect when the boundary of the
/// source is hit after zooming in to disable or enable the swiping gesture of
/// the [PageView].
///
typedef IndexedFocusedWidgetBuilder = Widget Function(
    BuildContext context, int index, bool isFocus, bool enablePageView);

typedef IndexedTagStringBuilder = String Function(int index);

enum SourceType { fileImage, networkImage, livePhoto }

class SourceModel {
  final SourceType sourceType;
  final String url;
  final String? liveUrl;

  const SourceModel({
    this.sourceType = SourceType.networkImage,
    required this.url,
    this.liveUrl,
  });
}

class InteractiveviewerGallery<T> extends StatefulWidget {
  const InteractiveviewerGallery({
    super.key,
    required this.sources,
    required this.initIndex,
    this.itemBuilder,
    this.maxScale = 8,
    this.minScale = 1.0,
    this.onPageChanged,
    this.onDismissed,
    this.setStatusBar,
    this.onClose,
  });

  final VoidCallback? onClose;

  final bool? setStatusBar;

  /// The sources to show.
  final List<SourceModel> sources;

  /// The index of the first source in [sources] to show.
  final int initIndex;

  /// The item content
  final IndexedFocusedWidgetBuilder? itemBuilder;

  final double maxScale;

  final double minScale;

  final ValueChanged<int>? onPageChanged;

  final ValueChanged<int>? onDismissed;

  @override
  State<InteractiveviewerGallery> createState() =>
      _InteractiveviewerGalleryState();
}

class _InteractiveviewerGalleryState extends State<InteractiveviewerGallery>
    with SingleTickerProviderStateMixin {
  PageController? _pageController;
  custom.TransformationController? _transformationController;

  /// The controller to animate the transformation value of the
  /// [InteractiveViewer] when it should reset.
  late AnimationController _animationController;
  Animation<Matrix4>? _animation;

  /// `true` when an source is zoomed in and not at the at a horizontal boundary
  /// to disable the [PageView].
  bool _enablePageView = true;

  late Offset _doubleTapLocalPosition;

  late final RxInt currentIndex = widget.initIndex.obs;

  late List<bool> _thumbList;
  late final int _quality = GStorage.previewQ;

  @override
  void initState() {
    super.initState();

    _thumbList = List.generate(widget.sources.length, (_) => true);

    _pageController = PageController(initialPage: widget.initIndex);

    _transformationController = custom.TransformationController();

    _animationController = AnimationController(
      vsync: this,
      duration: const Duration(milliseconds: 300),
    )..addListener(() {
        _transformationController!.value =
            _animation?.value ?? Matrix4.identity();
      });

    if (widget.setStatusBar != false) {
      setStatusBar();
    }

    if (widget.sources[currentIndex.value].sourceType == SourceType.livePhoto) {
      _onPlay(currentIndex.value);
    }
  }

  setStatusBar() async {
    if (Platform.isIOS || Platform.isAndroid) {
      await StatusBarControl.setHidden(
        true,
        animation: StatusBarAnimation.FADE,
      );
    }
  }

  @override
  void dispose() async {
    _player?.dispose();
    _pageController?.dispose();
    _animationController.removeListener(() {});
    _animationController.dispose();
    if (widget.setStatusBar != false) {
      if (Platform.isIOS || Platform.isAndroid) {
        StatusBarControl.setHidden(false, animation: StatusBarAnimation.FADE);
      }
    }
    for (int index = 0; index < widget.sources.length; index++) {
      if (widget.sources[index].sourceType == SourceType.networkImage) {
        CachedNetworkImageProvider(_getActualUrl(index)).evict();
      }
    }
    super.dispose();
  }

  /// When the source gets scaled up, the swipe up / down to dismiss gets
  /// disabled.
  ///
  /// When the scale resets, the dismiss and the page view swiping gets enabled.
  void _onScaleChanged(double scale) {
    final bool initialScale = scale <= widget.minScale;

    if (initialScale) {
      if (!_enablePageView) {
        setState(() {
          _enablePageView = true;
        });
      }
    } else {
      if (_enablePageView) {
        setState(() {
          _enablePageView = false;
        });
      }
    }
  }

  /// When the left boundary has been hit after scaling up the source, the page
  /// view swiping gets enabled if it has a page to swipe to.
  void _onLeftBoundaryHit() {
    if (!_enablePageView && _pageController!.page!.floor() > 0) {
      setState(() {
        _enablePageView = true;
      });
    }
  }

  /// When the right boundary has been hit after scaling up the source, the page
  /// view swiping gets enabled if it has a page to swipe to.
  void _onRightBoundaryHit() {
    if (!_enablePageView &&
        _pageController!.page!.floor() < widget.sources.length - 1) {
      setState(() {
        _enablePageView = true;
      });
    }
  }

  /// When the source has been scaled up and no horizontal boundary has been hit,
  /// the page view swiping gets disabled.
  void _onNoBoundaryHit() {
    if (_enablePageView) {
      setState(() {
        _enablePageView = false;
      });
    }
  }

  void _onPlay(int index) {
    _player ??= Player();
    _videoController ??= VideoController(_player!);
    _player!.open(Media(widget.sources[index].liveUrl!));
  }

  /// When the page view changed its page, the source will animate back into the
  /// original scale if it was scaled up.
  ///
  /// Additionally the swipe up / down to dismiss gets enabled.
  void _onPageChanged(int page) {
    _player?.pause();
    currentIndex.value = page;
    if (widget.sources[page].sourceType == SourceType.livePhoto) {
      _onPlay(page);
    }
    widget.onPageChanged?.call(page);
    if (_transformationController!.value != Matrix4.identity()) {
      // animate the reset for the transformation of the interactive viewer

      _animation = Matrix4Tween(
        begin: _transformationController!.value,
        end: Matrix4.identity(),
      ).animate(
        CurveTween(curve: Curves.easeOut).animate(_animationController),
      );

      _animationController.forward(from: 0);
    }
  }

  String _getActualUrl(int index) => _thumbList[index] && _quality != 100
      ? '${widget.sources[index]}@${_quality}q.webp'.http2https
      : widget.sources[index].url.http2https;

  void onClose() {
    if (widget.onClose != null) {
      widget.onClose!();
    } else {
      Get.back();
      widget.onDismissed?.call(_pageController!.page!.floor());
    }
  }

  Player? _player;
  VideoController? _videoController;

  @override
  Widget build(BuildContext context) {
    return Stack(
      children: [
        InteractiveViewerBoundary(
          controller: _transformationController,
          boundaryWidth: MediaQuery.of(context).size.width,
          onScaleChanged: _onScaleChanged,
          onLeftBoundaryHit: _onLeftBoundaryHit,
          onRightBoundaryHit: _onRightBoundaryHit,
          onNoBoundaryHit: _onNoBoundaryHit,
          maxScale: widget.maxScale,
          minScale: widget.minScale,
          onDismissed: onClose,
          onReset: () {
            if (!_enablePageView) {
              setState(() {
                _enablePageView = true;
              });
            }
          },
          child: PageView.builder(
            onPageChanged: _onPageChanged,
            controller: _pageController,
            physics:
                _enablePageView ? null : const NeverScrollableScrollPhysics(),
            itemCount: widget.sources.length,
            itemBuilder: (BuildContext context, int index) {
              return GestureDetector(
                behavior: HitTestBehavior.opaque,
                onTap: onClose,
                onDoubleTapDown: (TapDownDetails details) {
                  _doubleTapLocalPosition = details.localPosition;
                },
                onDoubleTap: onDoubleTap,
                onLongPress:
                    widget.sources[index].sourceType == SourceType.fileImage
                        ? null
                        : onLongPress,
                child: widget.itemBuilder != null
                    ? widget.itemBuilder!(
                        context,
                        index,
                        index == currentIndex.value,
                        _enablePageView,
                      )
                    : _itemBuilder(index),
              );
            },
          ),
        ),
        Positioned(
          bottom: 0,
          left: 0,
          right: 0,
          child: Container(
            padding: EdgeInsets.fromLTRB(
              12,
              8,
              20,
              MediaQuery.of(context).padding.bottom + 8,
            ),
            decoration: _enablePageView
                ? BoxDecoration(
                    gradient: LinearGradient(
                      begin: Alignment.topCenter,
                      end: Alignment.bottomCenter,
                      colors: [
                        Colors.transparent,
                        Colors.black.withOpacity(0.3)
                      ],
                    ),
                  )
                : null,
            child: Stack(
              alignment: Alignment.center,
              children: [
                Align(
                  alignment: Alignment.centerLeft,
                  child: IconButton(
                    icon: const Icon(Icons.close, color: Colors.white),
                    onPressed: onClose,
                  ),
                ),
                if (widget.sources.length > 1)
                  Align(
                    alignment: Alignment.center,
                    child: Obx(
                      () => Text(
                        "${currentIndex.value + 1}/${widget.sources.length}",
                        style: const TextStyle(color: Colors.white),
                      ),
                    ),
                  ),
                if (widget.sources[currentIndex.value].sourceType !=
                    SourceType.fileImage)
                  Align(
                    alignment: Alignment.centerRight,
                    child: PopupMenuButton(
                      itemBuilder: (context) {
                        return [
                          PopupMenuItem(
                            onTap: () => onShareImg(
                                widget.sources[currentIndex.value].url),
                            child: const Text("分享图片"),
                          ),
                          PopupMenuItem(
                            onTap: () {
                              Utils.copyText(
                                  widget.sources[currentIndex.value].url);
                            },
                            child: const Text("复制链接"),
                          ),
                          PopupMenuItem(
                            onTap: () {
                              DownloadUtils.downloadImg(
                                context,
                                [widget.sources[currentIndex.value].url],
                              );
                            },
                            child: const Text("保存图片"),
                          ),
                          if (widget.sources[currentIndex.value].sourceType ==
                              SourceType.livePhoto)
                            PopupMenuItem(
                              onTap: () {
                                DownloadUtils.downloadVideo(
                                  context,
                                  widget.sources[currentIndex.value].liveUrl!,
                                );
                              },
                              child: const Text("保存 Live"),
                            ),
                          if (widget.sources.length > 1)
                            PopupMenuItem(
                              onTap: () {
                                DownloadUtils.downloadImg(
                                  context,
                                  widget.sources
                                      .map((item) => item.url)
                                      .toList(),
                                );
                              },
                              child: const Text("保存全部图片"),
                            ),
                        ];
                      },
                      child: const Icon(Icons.more_horiz, color: Colors.white),
                    ),
                  ),
              ],
            ),
          ),
        ),
      ],
    );
  }

  // 图片分享
  void onShareImg(String imgUrl) async {
    SmartDialog.showLoading();
    var response = await Request()
        .get(imgUrl, options: Options(responseType: ResponseType.bytes));
    final temp = await getTemporaryDirectory();
    SmartDialog.dismiss();
    String imgName =
        "plpl_pic_${DateTime.now().toString().split('-').join()}.jpg";
    var path = '${temp.path}/$imgName';
    File(path).writeAsBytesSync(response.data);
    Share.shareXFiles([XFile(path)], subject: imgUrl);
  }

  Widget _itemBuilder(index) {
    return Center(
      child: Hero(
        tag: widget.sources[index].url,
        child: switch (widget.sources[index].sourceType) {
          SourceType.fileImage => Image(
              filterQuality: FilterQuality.low,
              image: FileImage(File(widget.sources[index].url)),
            ),
          SourceType.networkImage => CachedNetworkImage(
              fadeInDuration: const Duration(milliseconds: 0),
              fadeOutDuration: const Duration(milliseconds: 0),
              imageUrl: _getActualUrl(index),
              // fit: BoxFit.contain,
              progressIndicatorBuilder: (context, url, progress) {
                return Center(
                  child: SizedBox(
                    width: 150.0,
                    child:
                        LinearProgressIndicator(value: progress.progress ?? 0),
                  ),
                );
              },
              // errorListener: (value) {
              //   WidgetsBinding.instance.addPostFrameCallback((_) {
              //     setState(() {
              //       _thumbList[index] = false;
              //     });
              //   });
              // },
            ),
          SourceType.livePhoto => Obx(() => currentIndex.value == index
              ? IgnorePointer(
                  child: Video(
                    controller: _videoController!,
                    fill: Colors.transparent,
                  ),
                )
              : const SizedBox.shrink()),
        },
      ),
    );
  }

  onDoubleTap() {
    Matrix4 matrix = _transformationController!.value.clone();
    double currentScale = matrix.row0.x;

    double targetScale = widget.minScale;

    if (currentScale <= widget.minScale) {
      targetScale = widget.maxScale * 0.4;
    }

    double offSetX = targetScale == 1.0
        ? 0.0
        : -_doubleTapLocalPosition.dx * (targetScale - 1);
    double offSetY = targetScale == 1.0
        ? 0.0
        : -_doubleTapLocalPosition.dy * (targetScale - 1);

    matrix = Matrix4.fromList([
      targetScale,
      matrix.row1.x,
      matrix.row2.x,
      matrix.row3.x,
      matrix.row0.y,
      targetScale,
      matrix.row2.y,
      matrix.row3.y,
      matrix.row0.z,
      matrix.row1.z,
      targetScale,
      matrix.row3.z,
      offSetX,
      offSetY,
      matrix.row2.w,
      matrix.row3.w
    ]);

    _animation = Matrix4Tween(
      begin: _transformationController!.value,
      end: matrix,
    ).animate(
      CurveTween(curve: Curves.easeOut).animate(_animationController),
    );
    _animationController
        .forward(from: 0)
        .whenComplete(() => _onScaleChanged(targetScale));
  }

  onLongPress() {
    showDialog(
      context: context,
      builder: (context) {
        return AlertDialog(
          clipBehavior: Clip.hardEdge,
          contentPadding: const EdgeInsets.fromLTRB(0, 12, 0, 12),
          content: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              ListTile(
                onTap: () {
                  onShareImg(widget.sources[currentIndex.value].url);
                  Get.back();
                },
                dense: true,
                title: const Text('分享', style: TextStyle(fontSize: 14)),
              ),
              ListTile(
                onTap: () {
                  Get.back();
                  Utils.copyText(widget.sources[currentIndex.value].url);
                },
                dense: true,
                title: const Text('复制链接', style: TextStyle(fontSize: 14)),
              ),
              ListTile(
                onTap: () {
                  Get.back();
                  DownloadUtils.downloadImg(
                    context,
                    [widget.sources[currentIndex.value].url],
                  );
                },
                dense: true,
                title: const Text('保存图片', style: TextStyle(fontSize: 14)),
              ),
              if (widget.sources[currentIndex.value].sourceType ==
                  SourceType.livePhoto)
                ListTile(
                  onTap: () {
                    Get.back();
                    DownloadUtils.downloadVideo(
                      context,
                      widget.sources[currentIndex.value].liveUrl!,
                    );
                  },
                  dense: true,
                  title: const Text(
                    '保存 Live',
                    style: TextStyle(fontSize: 14),
                  ),
                ),
              if (widget.sources.length > 1)
                ListTile(
                  onTap: () {
                    Get.back();
                    DownloadUtils.downloadImg(
                      context,
                      widget.sources.map((item) => item.url).toList(),
                    );
                  },
                  dense: true,
                  title: const Text('保存全部图片', style: TextStyle(fontSize: 14)),
                ),
            ],
          ),
        );
      },
    );
  }
}