import 'package:fis_measure/interfaces/process/calculators/values.dart';
import 'package:fis_measure/interfaces/process/items/terms.dart';
import 'package:fis_measure/process/calcuators/formulas/general.dart';
import 'package:fis_measure/process/items/item.dart';
import 'package:fis_measure/process/primitives/combos/two_length.dart';
import 'package:vid/us/vid_us_unit.dart';

import '../primitives/straightline.dart';
import 'calculator.dart';

class VerticalDistanceCal extends Calculator<StraightLine, double> {
  VerticalDistanceCal(StraightLine ref) : super(ref);

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

    final feature = ref.feature!;
    final viewport = feature.hostVisualArea!.viewport!;
    final p1 = feature.startPoint;
    final p2 = feature.endPoint;
    final pp1 = viewport.convert(p1);
    final pp2 = viewport.convert(p2);

    final value = (pp2.y - pp1.y).abs();
    // updateFloatValue(value);
    final ouput = ref.meta.outputs.first;
    feature.updateFloatValue(
        ouput, roundDouble(value, ouput.fractionalDigits), VidUsUnit.cm);
  }
}

class TimeSpanCal extends Calculator<StraightLine, double> {
  TimeSpanCal(StraightLine ref) : super(ref);

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

    final feature = ref.feature!;
    final viewport = feature.hostVisualArea!.viewport!;
    final p1 = feature.startPoint;
    final p2 = feature.endPoint;
    final pp1 = viewport.convert(p1);
    final pp2 = viewport.convert(p2);

    final value = (pp2.x - pp1.x).abs();
    updateFloatValue(value);
  }
}

class StenosisCal extends Calculator<TwoLengthAbstract, double> {
  StenosisCal(TwoLengthAbstract ref) : super(ref);

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

    final a1 = _pickChildValue(ref.child1);
    final a2 = _pickChildValue(ref.child2);

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

    if (a1 != null && a2 != null) {
      final value = GeneralFormulas.countStenosis(
        a1,
        a2,
      );
      updateFloatValue(value);
    }
  }

  double? _pickChildValue(MeasureItem item) {
    if (item.calculator == null) return null;
    ValueBase? value;
    if (item.measuredFeatures.isNotEmpty) {
      value = item.measuredFeatures.first.value;
    } else if (item.feature != null) {
      value = item.feature!.value;
    }
    if (value != null) {
      return (value as FloatValue).value ?? 0;
    }
    return null;
  }
}

class SlopeCal extends Calculator<StraightLine, double> {
  SlopeCal(StraightLine ref) : super(ref);

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

    final feature = ref.feature!;
    final viewport = feature.hostVisualArea!.viewport!;
    final p1 = feature.startPoint;
    final p2 = feature.endPoint;
    final pp1 = viewport.convert(p1);
    final pp2 = viewport.convert(p2);

    final distance = (pp2.y - pp1.y).abs();
    final time = (pp2.x - pp1.x).abs();

    for (var output in ref.meta.outputs) {
      if (output.name == MeasureTerms.Slope) {
        var slope = GeneralFormulas.countSlope(pp1, pp2);
        feature.updateFloatValue(output, slope, output.unit);
      } else if (output.name == MeasureTerms.Timespan) {
        feature.updateFloatValue(output, time, output.unit);
      } else if (output.name == MeasureTerms.Distance) {
        feature.updateFloatValue(output, distance, output.unit);
      }
    }
  }
}

class SlopeDopplerCal extends Calculator<StraightLine, double> {
  SlopeDopplerCal(StraightLine ref) : super(ref);

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

    final feature = ref.feature!;
    final viewport = feature.hostVisualArea!.viewport!;
    final p1 = feature.startPoint;
    final p2 = feature.endPoint;
    final pp1 = viewport.convert(p1);
    final pp2 = viewport.convert(p2);

    final distance = (pp2.y - pp1.y).abs();
    final time = (pp2.x - pp1.x).abs();

    for (var output in ref.meta.outputs) {
      if (output.name == MeasureTerms.Slope) {
        var slope = GeneralFormulas.countSlope(pp2, pp1);
        feature.updateFloatValue(output, slope, output.unit);
      } else if (output.name == MeasureTerms.Timespan) {
        feature.updateFloatValue(output, time, output.unit);
      } else if (output.name == MeasureTerms.Distance) {
        feature.updateFloatValue(output, distance, output.unit);
      }
    }
  }
}