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/workspace/point_info.dart';
import 'package:fis_measure/process/calcuators/calculator.dart';
import 'package:fis_measure/process/items/top_item.dart';
import 'package:fis_measure/process/items/top_item_feature.dart';
import 'package:fis_measure/process/primitives/straightline.dart';
import 'package:vid/us/vid_us_unit.dart';

class Afi extends TopMeasureItem<AfiFeature> {
  static const String _lineQ1Key = "Q1";
  static const String _lineQ2Key = "Q2";
  static const String _lineQ3Key = "Q3";
  static const String _lineQ4Key = "Q4";

  late final StraightLine q1;
  late final StraightLine q2;
  late final StraightLine q3;
  late final StraightLine q4;

  Afi(ItemMeta meta) : super(meta) {
    final metaQ1 = meta.getChildByName(_lineQ1Key)!;
    final metaQ2 = meta.getChildByName(_lineQ2Key)!;
    final metaQ3 = meta.getChildByName(_lineQ3Key)!;
    final metaQ4 = meta.getChildByName(_lineQ4Key)!;
    q1 = StraightLine.createDistance(metaQ1, this);
    q2 = StraightLine.createDistance(metaQ2, this);
    q3 = StraightLine.createDistance(metaQ3, this);
    q4 = StraightLine.createDistance(metaQ4, this);
    childItems.add(q1);
    childItems.add(q2);
    childItems.add(q3);
    childItems.add(q4);
  }

  @override
  bool get finishAfterUnactive => true;

  @override
  AfiFeature buildFeature() => AfiFeature(this);

  static Afi createAfi(ItemMeta meta, [IMeasureItem? parent]) {
    final afi = Afi(meta);
    afi.calculator = AfiSumCal(afi);
    return afi;
  }
}

class AfiFeature extends TopMeasureItemFeature {
  AfiFeature(Afi refItem) : super(refItem);
}

class AfiSumCal extends Calculator<Afi, double> {
  AfiSumCal(Afi ref) : super(ref);

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

    final vQ1 = findChildFeature(ref.q1)?.value;
    final vQ2 = findChildFeature(ref.q2)?.value;
    final vQ3 = findChildFeature(ref.q3)?.value;
    final vQ4 = findChildFeature(ref.q4)?.value;

    double q1 = 0;
    double q2 = 0;
    double q3 = 0;
    double q4 = 0;
    VidUsUnit unit = VidUsUnit.None;
    if (vQ1 != null) {
      q1 = vQ1.pickFloat()!;
      unit = vQ1.unit;
    }
    if (vQ2 != null) {
      q2 = vQ2.pickFloat()!;
      unit = vQ2.unit;
    }
    if (vQ3 != null) {
      q3 = vQ3.pickFloat()!;
      unit = vQ3.unit;
    }
    if (vQ4 != null) {
      q4 = vQ4.pickFloat()!;
      unit = vQ4.unit;
    }
    final afi = q1 + q2 + q3 + q4;
    updateFloatValue(afi, unit: unit, useRound: true);
  }
}