import 'dart:ui' as ui;

import 'package:fis_measure/interfaces/date_types/point.dart';
import 'package:fis_measure/interfaces/enums/items.dart';
import 'package:fis_measure/interfaces/process/items/item.dart';
import 'package:fis_measure/interfaces/process/items/item_metas.dart';
import 'package:fis_measure/interfaces/process/items/types.dart';
import 'package:fis_measure/interfaces/process/workspace/point_info.dart';
import 'package:fis_measure/process/calcuators/urm_calcuators/urm_shell_den_measure.dart';
import 'package:fis_measure/process/calcuators/urm_calcuators/urm_shell_den_vel_measure.dart';
import 'package:fis_measure/process/calcuators/urm_calcuators/urm_shell_density_measure.dart';
import 'package:fis_measure/process/calcuators/urm_calcuators/urm_shell_fractal_dim_measure.dart';
import 'package:fis_measure/process/calcuators/urm_calcuators/urm_shell_hist_measure.dart';
import 'package:fis_measure/process/calcuators/urm_calcuators/urm_shell_perfusion_measure.dart';
import 'package:fis_measure/process/calcuators/urm_calcuators/urm_shell_vel_measure.dart';
import 'package:fis_measure/process/primitives/area_abstract.dart';
import 'package:fis_measure/process/primitives/trace.dart';
import 'package:fis_measure/process/primitives/utils/urm_sharp_copy.dart';
import 'package:fis_measure/utils/canvas.dart';
import 'package:fis_measure/utils/prompt_box.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

class URMShellMeasure extends Trace {
  URMShellMeasure(super.meta, super.parent);

  static URMShellMeasure createURMShellDenMeasure(ItemMeta meta,
      [IMeasureItem? parent]) {
    URMShellMeasure measureShellDen = URMShellMeasure(meta, parent);
    measureShellDen.calculator = URMShellDenMeasureCal(
      measureShellDen,
    );
    return measureShellDen;
  }

  static URMShellMeasure createURMShellVelMeasure(ItemMeta meta,
      [IMeasureItem? parent]) {
    URMShellMeasure measureShellVel = URMShellMeasure(meta, parent);
    measureShellVel.calculator = URMShellVelMeasureCal(
      measureShellVel,
    );
    return measureShellVel;
  }

  static URMShellMeasure createURMShellDensityMeasure(ItemMeta meta,
      [IMeasureItem? parent]) {
    URMShellMeasure measureShellDensity = URMShellMeasure(meta, parent);
    measureShellDensity.calculator = URMShellDensityMeasureCal(
      measureShellDensity,
    );
    return measureShellDensity;
  }

  static URMShellMeasure createURMShellFractalDimMeasure(ItemMeta meta,
      [IMeasureItem? parent]) {
    URMShellMeasure measureShellFractalDim = URMShellMeasure(meta, parent);
    measureShellFractalDim.calculator = URMShellFractalDimMeasureCal(
      measureShellFractalDim,
    );
    return measureShellFractalDim;
  }

  static URMShellMeasure createURMShellPerfusionMeasure(ItemMeta meta,
      [IMeasureItem? parent]) {
    URMShellMeasure measureShellPerfusion = URMShellMeasure(meta, parent);
    measureShellPerfusion.calculator = URMShellPerfusionMeasureCal(
      measureShellPerfusion,
    );
    return measureShellPerfusion;
  }

  static URMShellMeasure createURMShellHistMeasure(ItemMeta meta,
      [IMeasureItem? parent]) {
    URMShellMeasure measureShellHist = URMShellMeasure(meta, parent);
    measureShellHist.calculator = URMShellHistMeasureCal(
      measureShellHist,
    );
    return measureShellHist;
  }

  static URMShellMeasure createURMShellDenVelMeasure(ItemMeta meta,
      [IMeasureItem? parent]) {
    URMShellMeasure measureShellDenVel = URMShellMeasure(meta, parent);
    measureShellDenVel.calculator = URMShellDenVelMeasureCal(
      measureShellDenVel,
    );
    return measureShellDenVel;
  }

  @override
  bool onExecuteMouse(PointInfo args) {
    if (waitingResult) return false;
    if (state == ItemStates.finished) {
      if (args.pointType == PointInfoType.mouseDown) {
        state = ItemStates.waiting;
      }
    }

    if (state == ItemStates.waiting) {
      if (args.pointType == PointInfoType.mouseDown) {
        handleMouseDownWhileWaiting(args);
      }
    } else if (state == ItemStates.running) {
      if (args.pointType == PointInfoType.mouseUp) return false;

      feature?.adopt(args);
      if (args.pointType == PointInfoType.mouseDown) {
        handleFinish();
      } else {
        checkAutoSnap(args);
      }
    }
    return true;
  }

  @override
  void handleMouseDownWhileWaiting(PointInfo args) {
    if (meta.measureType == MeasureTypes.URMShellPerfusionMeasure) {
      feature = ShellPerfusionImageFeature(this);
    } else {
      feature = ShellImageFeature(this);
      // if (args.hostVisualArea != null) {
      //   feature!.hostVisualArea = args.hostVisualArea;
      // }
      // final point = args.toAreaLogicPoint();
      // feature!.adopt(point);
    }
    state = ItemStates.running;
  }

  bool waitingResult = false;

  void handleFinish({bool recordSharp = true}) async {
    if (recordSharp) {
      _recordSharp();
    }

    feature!.isActive = false;
    waitingResult = true;
    await doCalculateAsync();
    doFeatureFinish();
    doFeatureUpdate(); // 若不执行，子测量将无法自动切换
    PromptBox.dismiss();
    waitingResult = false;
  }

  void _recordSharp() {
    UrmSharpCopyBoard.recordSharp(
      UrmSharpCopyDataType.rim,
      feature!.innerPoints,
    );
  }

  /// 自动结束检测
  @override
  bool checkAutoSnap(PointInfo current, [bool autoFinishFeature = true]) {
    if (feature == null || feature!.innerPoints.length < 3) {
      isSmartMove = false;
      return _syncState(false);
    }

    // final viewport = feature!.hostVisualArea!.viewport!;

    if (isAutoSnap == false) return false;
    final pixelSize = application.displaySize;

    final p1 = feature!.innerPoints.first.scale2Size(pixelSize);
    final p2 = current.scale2Size(pixelSize);
    final length = (p1 - p2).length;
    if (length > snapThreshold * 2.0 && !isSmartMove) {
      isSmartMove = true;
    }
    if (length < snapThreshold && isSmartMove) {
      feature!.innerPoints.last = feature!.innerPoints.first.clone();

      /// 此处的最后一个点，方便计算，但是绘制时要剔除
      // feature!.innerPoints.removeLast();

      HapticFeedback.heavyImpact();
      if (autoFinishFeature) {
        handleFinish();
      }
      isSmartMove = false;
      return _syncState(true);
    } else {
      return _syncState(false);
    }
  }

  bool _syncState(bool isSnap) {
    snapState = isSnap;
    return snapState;
  }
}

class ShellImageFeature extends TraceFeature {
  ShellImageFeature(AreaItemAbstract refItem) : super(refItem);

  List<DPoint> outerExterPoints = [];
  List<DPoint> interExterPoints = [];
  bool isNeedPaintColors = false;

  /// 绘制rim 外环
  @override
  void paint(Canvas canvas, Size size) {
    super.paint(canvas, size);

    if (outerExterPoints.isEmpty) {
      return;
    }
    final pixelPoints = outerExterPoints.map((e) {
      return convert2ViewPoint(size, e).toOffset();
    }).toList();

    canvas.drawDashPointsLine(pixelPoints, 1, 10, paintLinePan, close: true);
    if (isNeedPaintColors) {
      final inPixelPoints = interExterPoints
          .map((e) => convert2ViewPoint(size, e).toOffset())
          .toList();
      // 创建一个蓝色带透明度的Paint对象，用于填充区域
      Paint outPaint = Paint()
        ..color = const Color(0xFF2897ea).withOpacity(0.5)
        ..style = PaintingStyle.fill;

      // 创建一个蓝色带透明度的Paint对象，用于填充区域
      Paint innerPaint = Paint()
        ..color = const Color(0xFF57ED26).withOpacity(0.5)
        ..style = PaintingStyle.fill;
      // 创建Path并连接点
      Path path = Path();
      Path pathb = Path();
      if (pixelPoints.isNotEmpty) {
        path.moveTo(pixelPoints[0].dx, pixelPoints[0].dy);
        for (var point in pixelPoints) {
          path.lineTo(point.dx, point.dy);
        }
        path.close(); // 闭合路径
      }
      if (inPixelPoints.isNotEmpty) {
        pathb.moveTo(inPixelPoints[0].dx, inPixelPoints[0].dy);
        for (var point in inPixelPoints) {
          pathb.lineTo(point.dx, point.dy);
        }
        pathb.close(); // 闭合路径
      }

      // 绘制路径
      canvas.drawPath(path, outPaint);

      // 绘制路径
      canvas.drawPath(pathb, innerPaint);
    }
  }
}

class ShellPerfusionImageFeature extends TraceFeature {
  ShellPerfusionImageFeature(AreaItemAbstract refItem) : super(refItem);

  ui.Image? perfusionImg;
  DPoint? leftTopPoint;
  DPoint? rightBottomPoint;
  List<DPoint> outerExterPoints = [];

  /// 绘制灌注图
  @override
  void paintPerfusion(Canvas canvas, Size size) {
    if (perfusionImg != null) {
      Paint paint = Paint();

      Rect src = Rect.fromLTWH(
        0,
        0,
        perfusionImg!.width.toDouble(),
        perfusionImg!.height.toDouble(),
      );
      if (leftTopPoint == null || rightBottomPoint == null) {
        return;
      }
      DPoint leftTop = convert2ViewPoint(size, leftTopPoint!);
      DPoint rightBottom = convert2ViewPoint(size, rightBottomPoint!);
      convert2ViewPoint(size, rightBottomPoint!);
      Rect dst = Rect.fromPoints(
          Offset(leftTop.x, leftTop.y), Offset(rightBottom.x, rightBottom.y));
      canvas.drawImageRect(perfusionImg!, src, dst, paint);

      final pixelPoints = outerExterPoints.map((e) {
        return convert2ViewPoint(size, e).toOffset();
      }).toList();

      canvas.drawDashPointsLine(pixelPoints, 1, 10, paintLinePan, close: true);
    }
  }
}