import 'package:fis_measure/interfaces/process/items/item_metas.dart';
import 'package:fis_measure/interfaces/process/items/terms.dart';
import 'package:fis_measure/process/calcuators/formulas/cardiac.dart';
import 'package:fis_measure/process/primitives/combos/pisa.dart';
import 'package:vid/us/vid_us_unit.dart';

import 'calculator.dart';
import 'trace.dart';

class PisaCal extends Calculator<Pisa, double> {
  PisaCal(super.ref);

  static const String vMaxKey = "Vmax";
  static const String rvKey = "RV";
  static const String eroaKey = "EROA";
  static const String flowRateKey = "Flow Rate";

  @override
  void calculate() {
    if (ref.feature == null) return;

    final feature = ref.feature!;

    feature.values.clear();

    feature.updateStringValue(
      ItemOutputMeta(ref.displayName, ref.description, VidUsUnit.None),
      '',
    );

    // final yUnit= ref.application.currentViewPort.yUnit;

    double mrRadius = double.nan;
    double vti = double.nan;
    double mrVmax = double.nan;

    final radiusFeature = findChildFeature(ref.radius);
    if (radiusFeature != null) {
      mrRadius = pickChildFloatValue(ref.radius)!;
      final output = ref.radius.meta.outputs.first;
      feature.updateFloatValue(output, mrRadius, VidUsUnit.cm);
    }
    final vtiFeature = findChildFeature(ref.trace);
    if (vtiFeature != null) {
      final countVTIResult = TraceCal.getCountVTI(vtiFeature);
      var outputVTI = countVTIResult[0];
      var outputVelocityMax = countVTIResult[3];

      vti = outputVTI;
      mrVmax = outputVelocityMax;

      final outputs = ref.trace.meta.outputs;
      for (var output in outputs) {
        if (output.name == MeasureTerms.Placeholder) {
          feature.updateStringValue(output, "");
        } else if (output.name == MeasureTerms.VTI) {
          feature.updateFloatValue(
              output, vti.abs(), VidUsUnit.cm); // 特殊处理，显示绝对值
        } else if (output.name == MeasureTerms.VelocityMax) {
          feature.updateFloatValue(output, mrVmax, VidUsUnit.cms);
        }
      }
    }

    double mrAlsVel = ref.alsVel.value!; // TODO: with unit

    double mrRV = double.nan;
    double mrEROA = double.nan;
    double mrFlowRate = double.nan;

    if (!mrRadius.isNaN && !vti.isNaN && !mrVmax.isNaN && !mrAlsVel.isNaN) {
      mrEROA = CardiacFormulas.mrEROA(mrRadius, mrAlsVel, mrVmax);
      mrRV = CardiacFormulas.mrRV(mrEROA, vti);
      mrFlowRate = CardiacFormulas.mrFlowRate(mrRadius, mrAlsVel);
    }

    for (var output in ref.meta.outputs) {
      if (output.name == rvKey) {
        if (!mrRV.isNaN) {
          feature.updateFloatValue(
              output, mrRV.abs(), VidUsUnit.ml); // 特殊处理，显示绝对值
        }
      } else if (output.name == eroaKey) {
        if (!mrEROA.isNaN) {
          feature.updateFloatValue(output, mrEROA, VidUsUnit.cm2);
        }
      } else if (output.name == flowRateKey) {
        if (!mrFlowRate.isNaN) {
          feature.updateFloatValue(output, mrFlowRate, VidUsUnit.mls);
        }
      } else if (output.name == MeasureTerms.AlsVel) {
        if (!mrAlsVel.isNaN) {
          feature.updateFloatValue(output, mrAlsVel, VidUsUnit.cms);
        }
      }
    }
  }
}