import 'dart:async';
import 'dart:math';
import 'dart:ui';

import 'package:fis_i18n/i18n.dart';
import 'package:fis_jsonrpc/rpc.dart';
import 'package:fis_measure/interfaces/date_types/int_size.dart';
import 'package:fis_measure/interfaces/enums/operate.dart';
import 'package:fis_measure/interfaces/process/calculators/output.dart';
import 'package:fis_measure/interfaces/process/items/item_feature.dart';
import 'package:fis_measure/interfaces/process/player/play_controller.dart';
import 'package:fis_measure/interfaces/process/standard_line/calibration.dart';
import 'package:fis_measure/interfaces/process/workspace/application.dart';
import 'package:fis_measure/interfaces/process/workspace/measure_3d_view_controller.dart';
import 'package:fis_measure/process/workspace/measure_3d_view_controller.dart';
import 'package:fis_measure/process/workspace/measure_data_controller.dart';
import 'package:fis_measure/process/workspace/measure_handler.dart';
import 'package:fis_measure/process/workspace/third_part/application.dart';
import 'package:fis_measure/process/workspace/third_part/calibration_controller.dart';
import 'package:fis_measure/utils/canvas.dart';
import 'package:fis_measure/utils/prompt_box.dart';
import 'package:fis_measure/values/colors.dart';
import 'package:fis_measure/view/menu_button_group/menu_button_group.dart';
import 'package:fis_measure/view/3d_view/carotid_player.dart';
import 'package:fis_measure/view/gesture/annotation/annotation_gesture.dart';
import 'package:fis_measure/view/measure/measure_result.dart';
import 'package:fis_measure/view/paint/ai_patint.dart';
import 'package:fis_measure/view/paint/ai_patint_controller.dart';
import 'package:fis_measure/view/paint/ai_patint_result.dart';
import 'package:fis_measure/view/result/results_panel.dart';
import 'package:fis_measure/view/standard_line/calibration_canvas.dart';
import 'package:fis_measure/view/standard_line/calibration_gesture.dart';
import 'package:fis_ui/base_define/page.dart';
import 'package:fis_ui/index.dart';
import 'package:fis_ui/widgets/layout/offstage.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:get/get.dart';

import 'package:fis_measure/view/canvas/active_canvas.dart';
import 'package:fis_measure/view/canvas/annotation_canvas.dart';
import 'package:fis_measure/view/canvas/records_canvas.dart';
import 'package:fis_measure/view/gesture/mouse_gesture.dart';
import 'package:fis_measure/view/pause/pause_panel.dart';
import 'package:fis_measure/view/player/controller.dart';
import 'package:fis_measure/view/player/player.dart';
import 'package:fis_measure/view/loadding/loadding.dart';

class MeasureMainView extends StatefulWidget implements FPage {
  const MeasureMainView({Key? key}) : super(key: key);

  @override
  State<StatefulWidget> createState() => _MeasureMainViewState();

  @override
  String get pageName => "MeasureMainView";
}

class _MeasureMainViewState extends State<MeasureMainView> {
  late final application = Get.find<IApplication>();

  late final playerController = Get.find<IPlayerController>();
  late final measure3DViewController = Get.find<Measure3DViewController>();
  late final measureHandler = Get.find<MeasureHandler>();

  /// 测量数据
  final measureData = Get.find<MeasureDataController>();

  late bool canMeasure = application.canMeasure;
  bool get canMeasureDrawing => measureHandler.canMeasureDrawing;
  late final aiPatintController = Get.find<AiPatintController>();

  late bool enableCarotid2DMeasure = false;
  bool isCaptureState = false;
  late double calibrationLine = 4;
  final List<OutputItem> outputs = [];

  /// 是否显示loading加载提示
  bool _ifShowLoadingTips = false;

  /// loading加载提示文字
  String _loadingTipsText = '';

  /// loading加载触发计时器
  Timer? _streamLoadingTimer;

  /// 是否显示进度条
  bool ifShowProgressBar = true;

  /// 是否是首次加载的新Vid
  bool isNewVid = true;

  /// 参考校准线控制器
  IStandardLineCalibrationController? standardLineCalibrationController;

  final playerKey = GlobalKey();
  final _captureAreaKey = GlobalKey();

  bool get inAnnotation =>
      application.currentOperateType == MeasureOperateType.annotation;

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

    VidPlayerController vidPlayerController =
        playerController as VidPlayerController;
    WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
      onCanMeasureChanged(this, application.canMeasure);
      application.canMeasureChanged.addListener(onCanMeasureChanged);
      application.operateTypeChanged.addListener(onOperateTypeChanged);
      measure3DViewController.updatePlayerMode.addListener(_onModeChanged);

      /// [Carotid] ✅在此判断是否为颈动脉2D图像，如果是，则不显示进度条且读取设置播放器单帧缓存
      if (measure3DViewController.curMeasureMode == MeasureMode.carotid2DMode) {
        vidPlayerController.pause();
        vidPlayerController
            .set2DMeasureFrame(measure3DViewController.image4Measure!);
        setState(() {
          enableCarotid2DMeasure = true;
          ifShowProgressBar = false;
        });
        application.clearRecords();
      }
    });
    vidPlayerController.errorOccured.addListener(_onErrorOccured);
    playerController.frameLoadStateChanged.addListener(_onLoadStateChanged);
    measureHandler.canMeasureDrawingChanged
        .addListener(_onCanMeasureDrawingChanged);
  }

  @override
  void dispose() {
    application.canMeasureChanged.removeListener(onCanMeasureChanged);
    application.operateTypeChanged.removeListener(onOperateTypeChanged);
    measure3DViewController.updatePlayerMode.removeListener(_onModeChanged);
    playerController.frameLoadStateChanged.removeListener(_onLoadStateChanged);
    measureHandler.canMeasureDrawingChanged
        .removeListener(_onCanMeasureDrawingChanged);
    uninstallStandardLine();
    super.dispose();
  }

  /// 装载参考校准线
  void installStandardLine() {
    if (application.isThirdPart) {
      final standradLine = (application as ThirdPartApplication).standardLine;
      standardLineCalibrationController =
          StandardLineCalibrationController(application, standradLine);
      standardLineCalibrationController!.editStateChanged
          .addListener(onStandardLineCalibrationStateChanged);
      Get.put<IStandardLineCalibrationController>(
          standardLineCalibrationController!);
    }
  }

  /// 卸载参考校准线
  void uninstallStandardLine() {
    standardLineCalibrationController?.editStateChanged
        .removeListener(onStandardLineCalibrationStateChanged);
    Get.delete<IStandardLineCalibrationController>();
  }

  /// 流式加载出错
  void _onErrorOccured(Object s, String? error) {
    /// 第一次收到加载出错，不显示错误信息，直接重新加载一次，如果再次收到加载出错，显示错误信息
    if (isNewVid) {
      /// 如果不重新加载，在生产环境下会由于流式加载出错而导致无法播放
      /// 由于 debug 环境下不会出问题，所以下面用了 debugPrint
      /// debugPrint('流式加载出错: $error,尝试重新加载');
      isNewVid = false;
      Future.delayed(const Duration(milliseconds: 100), () {
        playerController.locateTo(0);
        playerController.play();
      });
      setState(() {
        _ifShowLoadingTips = error?.isNotEmpty ?? false;
      });
    } else {
      setState(() {
        _ifShowLoadingTips = error?.isNotEmpty ?? false;
        _loadingTipsText = error ?? '';
      });
    }
  }

  /// 流式加载loadding
  void _onLoadStateChanged(sender, bool e) {
    if (e) {
      _streamLoadingTimer?.cancel();
      _streamLoadingTimer = Timer(const Duration(milliseconds: 100), () {
        setState(() {
          _ifShowLoadingTips = true;
          _loadingTipsText = i18nBook.common.loading.t;
        });
      });
    } else {
      _streamLoadingTimer?.cancel();
      if (_ifShowLoadingTips) {
        setState(() {
          _ifShowLoadingTips = false;
        });
      }
    }
  }

  /// 模式改变触发更新
  /// [Carotid] ✅组件不销毁的情况下，切换模式的时候，可以触发
  void _onModeChanged(Object s, MeasureMode mode) {
    switch (mode) {
      case MeasureMode.vidMode:
        playerController.play();
        setState(() {
          ifShowProgressBar = true;
          enableCarotid2DMeasure = false;
        });
        break;
      case MeasureMode.carotid2DMode:
        setState(() {
          ifShowProgressBar = false;
          enableCarotid2DMeasure = true;
        });
        break;
      case MeasureMode.carotid3DMode:
        break;
    }
  }

  /// 保存图片
  void capturePng() async {
    setState(() {
      isCaptureState = true;
    });
    final features = <IMeasureItemFeature>[];
    for (var item in application.measureItems) {
      if (item.measuredFeatures.isNotEmpty) {
        features.addAll(item.measuredFeatures);
      }
      if (item.feature != null) {
        features.add(item.feature!);
      }
    }
    MeasureResult measureResult = MeasureResult(
      measureApplicationName: application.applicationName,
      features: features,
    );
    //加延时是为了等待 UI 消失，防止截图截到 UI
    Future.delayed(const Duration(milliseconds: 100), () async {
      final RenderRepaintBoundary? boundary = _captureAreaKey.currentContext
          ?.findRenderObject() as RenderRepaintBoundary?;
      if (boundary != null) {
        final image = await boundary.toImage();
        final byteData = await image.toByteData(format: ImageByteFormat.png);
        final pngBytes = byteData!.buffer.asUint8List();
        PromptBox.snackbar(
            i18nBook.measure.saveLocation.t +
                ' > ' +
                i18nBook.measure.measureImage.t,
            duration: const Duration(milliseconds: 1500),
            title: i18nBook.measure.screenshotSavedSuccessfully.t,
            textColor: Colors.white,
            backgroundColor: Colors.black.withOpacity(0.7));
        setState(() {
          isCaptureState = false;
        });
        measureData.saveImage.call(
          pngBytes,
          measureData.measureImageData.patientCode ?? '',
          measureData.measureImageData.recordCode ?? '',
          measureData.measureImageData.remedicalCode ?? '',
          measureResult.toDisplay(),
        );
      }
    });
  }

  void onCanMeasureChanged(Object sender, bool e) {
    if (e != canMeasure) {
      setState(() {
        canMeasure = e;
      });
    }
  }

  void onOperateTypeChanged(Object sender, MeasureOperateType e) {
    setState(() {});
  }

  void _onCanMeasureDrawingChanged(Object sender, bool e) {
    setState(() {});
  }

  void onStandardLineCalibrationStateChanged(
      Object sender, StandardLineCalibrationEditState e) {
    setState(() {
      if (e == StandardLineCalibrationEditState.drawn) {
        Get.dialog(buildCalibrationLine());
      }
    });
  }

  FWidget buildCalibrationLine() {
    return FSimpleDialog(
      title: FText(
        i18nBook.measure.guideCalibration.t,
        style: const TextStyle(
          color: Colors.white,
          fontSize: 18,
        ),
      ),
      isDefault: true,
      cancelString: i18nBook.common.cancel.t,
      okString: i18nBook.common.confirm.t,
      onOk: () {
        standardLineCalibrationController!.confirmEdit(calibrationLine);
        Get.back();
      },
      onCancel: () {
        standardLineCalibrationController!.cancelEdit();
        Get.back();
      },
      children: [
        buildCalibrationLineItem(
          i18nBook.measure.length.t,
          FTextField(
            decoration: InputDecoration(
              hintText:
                  i18nBook.common.input.translate([i18nBook.measure.length.t]),
              hintStyle: const TextStyle(
                fontSize: 16,
              ),
              enabledBorder: OutlineInputBorder(
                borderSide: BorderSide(
                  color: Colors.white.withOpacity(0.5),
                  width: 0.5,
                  style: BorderStyle.solid,
                ),
              ),
              focusedBorder: const OutlineInputBorder(
                borderSide: BorderSide(
                  color: Colors.blue,
                  width: 0.5,
                  style: BorderStyle.solid,
                ),
              ),
              filled: true,
            ),
            onChanged: (val) => calibrationLine = double.parse(val),
          ),
        ),
        buildCalibrationLineItem(
          i18nBook.measure.unit.t,
          const FText('cm'),
        ),
      ],
    );
  }

  FWidget buildCalibrationLineItem(String name, FWidget itemWidget) {
    return FContainer(
      padding: const EdgeInsets.symmetric(vertical: 15, horizontal: 25),
      child: FRow(
        children: [
          FContainer(
            width: 60,
            child: FText(name),
          ),
          FExpanded(
            child: itemWidget,
          ),
        ],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    MeasureCanvasExt.setFontFamily(
      Theme.of(context).textTheme.labelLarge?.fontFamily,
    );
    bool canShowAI = [
      DiagnosisConclusionEnum.Benign,
      DiagnosisConclusionEnum.Malignant,
      DiagnosisConclusionEnum.BenignAndMalignant
    ].contains(measureData.diagnosisConclusion);
    return Container(
      color: MeasureColors.Background,
      child: RepaintBoundary(
        child: Column(
          children: [
            Expanded(
              child: Row(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Expanded(
                    child: RepaintBoundary(
                      key: _captureAreaKey,
                      child: CustomMultiChildLayout(
                        delegate: _LayerLayoutDelegate(),
                        children: [
                          LayoutId(
                            id: _LayerLayoutIds.player,
                            child: enableCarotid2DMeasure
                                ? CarotidPlayer(
                                    measure3DViewController,
                                  )
                                : VidPlayer(
                                    playerController as VidPlayerController,
                                  ),
                          ),
                          if (canMeasure) ...[
                            LayoutId(
                              id: _LayerLayoutIds.recordsCanvas,
                              child: _enableMeasureOffstageWrap(
                                  const MeasureRecordsCanvasPanel()),
                            ),
                            LayoutId(
                              id: _LayerLayoutIds.activeMeasure,
                              child: _enableMeasureOffstageWrap(
                                  const MeasureActiveCanvasPanel()),
                            ),
                            LayoutId(
                              id: _LayerLayoutIds.activeAnnotation,
                              child: _enableMeasureOffstageWrap(
                                  const AnnotationCanvas()),
                            ),
                            if (application.isThirdPart)
                              LayoutId(
                                id: _LayerLayoutIds.standardLineCalibration,
                                child: _enableMeasureOffstageWrap(
                                    StandardLineCalibrationCanvas(
                                        standardLineCalibrationController!)),
                              ),
                            LayoutId(
                              id: _LayerLayoutIds.gesture,
                              child: _enableMeasureOffstageWrap(
                                  _buildGestureLayer()),
                            ),
                            LayoutId(
                              id: _LayerLayoutIds.result,
                              child: _enableMeasureOffstageWrap(
                                  const MeasureResultPanel()),
                            ),
                          ],
                          if (canMeasure)
                            LayoutId(
                              id: _LayerLayoutIds.buttonGroups,
                              child: FOffstage(
                                offstage: isCaptureState,
                                child: FMenuButtonGroup(
                                  businessParent: widget,
                                  capturePng: () => capturePng(),
                                ),
                              ),
                            ),
                          if (canShowAI) ...[
                            LayoutId(
                              id: _LayerLayoutIds.paintAI,
                              child: AIPaintInfo(
                                playerController as VidPlayerController,
                              ),
                            )
                          ],
                          if (enableCarotid2DMeasure) ...[
                            LayoutId(
                              id: _LayerLayoutIds.aiTips,
                              child: _buildAiTips(),
                            )
                          ],
                          if (_ifShowLoadingTips)
                            LayoutId(
                              id: _LayerLayoutIds.loadingTipsOverlay,
                              child: _buildLoadingOrError(_loadingTipsText),
                            ),
                        ],
                      ),
                    ),
                  ),
                  if (canShowAI && !measureHandler.fullScreenState) ...[
                    Obx(() {
                      return Visibility(
                        visible: aiPatintController.state.ifShowAi,
                        maintainState: true,
                        maintainAnimation: true,
                        maintainSize: true,
                        child: SizedBox(
                          width: 200,
                          child: AIPaintInfoReslut(
                            playerController as VidPlayerController,
                          ),
                        ),
                      );
                    })
                  ]
                ],
              ),
            ),
            ifShowProgressBar ? const MeasurePausePanel() : Container(),
          ],
        ),
      ),
    );
  }

  Widget _buildLoadingOrError([String? loadingText = '加载失败']) {
    return FStack(
      children: [
        FMouseRegion(
          child: FContainer(
            width: double.infinity,
            height: double.infinity,
            color: Colors.black.withOpacity(.5),
            child: const FSizedBox(),
          ),
        ),
        FCenter(
          child: FContainer(
            padding: const EdgeInsets.symmetric(
              vertical: 20,
              horizontal: 40,
            ),
            child: FStack(children: [
              FCenter(
                child: FColumn(mainAxisSize: MainAxisSize.min, children: [
                  const SpinKitChasingDots(
                    color: Colors.white,
                    size: 30,
                  ),
                  const FSizedBox(height: 20),
                  FText(
                    loadingText!.isNotEmpty
                        ? loadingText
                        : i18nBook.common.loading.t,
                    style: const TextStyle(
                      color: Colors.white,
                    ),
                  ),
                ]),
              )
            ]),
          ),
        ),
      ],
    );
  }

  /// 仅当 canMeasureDrawing 为 true 时才显示的 Offstage 包装
  Widget _enableMeasureOffstageWrap(Widget child) {
    return Offstage(
      offstage: !canMeasureDrawing,
      child: child,
    );
  }

  Widget _buildGestureLayer() {
    if (application.isThirdPart) {
      if (standardLineCalibrationController!.isEditing) {
        return StandardLineCalibrationGesture(
            standardLineCalibrationController!);
      }
    }
    return inAnnotation
        ? const AnnotationGestureLayer()
        : const MeasureMouseGesturePanel();
  }

  Widget _buildAiTips() {
    return Transform(
      transform: Matrix4.translationValues(0, -18, 0),
      child: Text(
        i18nBook.measure.carotidAiTips.t,
        style: const TextStyle(color: Colors.grey, fontSize: 18, height: 1),
      ),
    );
  }
}

class _LayerLayoutDelegate extends MultiChildLayoutDelegate {
  Offset? layoutOffset;
  Size? layoutSize;

  _LayerLayoutDelegate();

  @override
  void performLayout(Size size) {
    if (!hasChild(_LayerLayoutIds.player)) return;

    final application = Get.find<IApplication>();
    final vidFrame = application.frameData;
    final imageSize = IntSize.fill(vidFrame?.width ?? 0, vidFrame?.height ?? 0);

    /// 以Contain方式填充布局，计算定位偏移量
    calcSize(size, imageSize);
    final offset = layoutOffset!;
    final renderSize = layoutSize!;
    final rightSpace = (size.width - renderSize.width) / 2;
    // 如果图像右侧剩余可用空间大于60，则将按钮组放在右侧，如果小于60，则尽可能靠右，60是按钮组宽度
    final buttonGroupOffsetX = min(rightSpace, 60.0);
    final resultPanelLayerSize =
        Size(renderSize.width + rightSpace, renderSize.height);

    /// 同步图像显示尺寸
    application.displaySize = renderSize;

    layoutLayer(_LayerLayoutIds.player, offset, renderSize);
    layoutLayer(_LayerLayoutIds.loadingTipsOverlay, offset, renderSize);

    /// 其他层按播放器尺寸位置层叠布局
    layoutLayer(_LayerLayoutIds.recordsCanvas, offset, renderSize);
    layoutLayer(_LayerLayoutIds.activeMeasure, offset, renderSize);
    layoutLayer(_LayerLayoutIds.activeAnnotation, offset, renderSize);
    layoutLayer(_LayerLayoutIds.standardLineCalibration, offset, renderSize);
    layoutLayer(_LayerLayoutIds.gesture, offset, renderSize);
    layoutLayer(
      _LayerLayoutIds.result,
      Offset.zero,
      resultPanelLayerSize,
    );
    layoutLayer(_LayerLayoutIds.pause, offset, renderSize);
    layoutLayer(_LayerLayoutIds.paintAI, offset, renderSize);
    layoutLayer(_LayerLayoutIds.aiTips, Offset(0.0, size.height), renderSize);
    layoutLayer(_LayerLayoutIds.buttonGroups,
        offset.translate(buttonGroupOffsetX, 0), renderSize);
  }

  void layoutLayer(_LayerLayoutIds layoutId, Offset offset, Size size) {
    if (hasChild(layoutId)) {
      layoutChild(
        layoutId,
        BoxConstraints.loose(size),
      );
      positionChild(layoutId, offset);
    }
  }

  void calcSize(Size size, IntSize imageSize) {
    final parentWHRatio = size.width / size.height;
    final imageWHRatio = imageSize.width / imageSize.height;
    if (imageWHRatio < parentWHRatio) {
      // 高度撑满
      final layoutWidth = size.height * imageWHRatio;
      final layoutHeight = size.height;
      final offsetX = (size.width - layoutWidth) / 2;
      layoutOffset = Offset(offsetX, 0);
      layoutSize = Size(layoutWidth, layoutHeight);
    } else if (imageWHRatio > parentWHRatio) {
      // 宽度撑满
      final layoutWidth = size.width;
      final layoutHeight = size.width / imageWHRatio;
      final offsetY = (size.height - layoutHeight) / 2;
      layoutOffset = Offset(0, offsetY);
      layoutSize = Size(layoutWidth, layoutHeight);
    } else {
      layoutOffset = Offset.zero;
      layoutSize = size;
    }
  }

  @override
  bool shouldRelayout(covariant MultiChildLayoutDelegate oldDelegate) {
    return false;
  }
}

enum _LayerLayoutIds {
  /// 播放器
  player,

  /// 流式加载提示蒙层
  loadingTipsOverlay,

  /// 测量记录画板
  recordsCanvas,

  /// 活动测量画板
  activeMeasure,

  /// 活动注释画板
  activeAnnotation,

  /// 结果面板
  result,

  /// 手势面板
  gesture,

  /// 暂停画板 后面需要优化命名
  pause,

  /// AI画板
  paintAI,

  /// AI 自动测量提示语[提醒：自动测量可能存在误差，仅供参考]
  aiTips,

  /// 按钮组
  buttonGroups,

  /// 参考校准线画板
  standardLineCalibration,
}