import { IGeodesic } from '../interfaces/geodesic.interface';
import { Point } from '../types/point.type';
import { SpacetimePoint } from './spacetime-point';

export class Route {
  distance: number;
  duration: number;
  fwdAzimuth: number;
  backAzimuth: number;
  distanceAzimuth: number;
  points: Point[];
  spacetimePoints: SpacetimePoint[];
  private geodesic: IGeodesic;

  constructor(geodesic: IGeodesic) {
    this.distance = undefined;
    this.duration = undefined;
    this.fwdAzimuth = undefined;
    this.backAzimuth = undefined;
    this.distanceAzimuth = undefined;
    this.points = [];
    this.spacetimePoints = [];
    this.geodesic = geodesic;
  }

  setPoints = (points: Point[]): void => {
    this.points = points;
    this.setAzimuth(points);
  };

  setSpacetimePoints = (spacetimePoints: SpacetimePoint[]): void => {
    this.spacetimePoints = spacetimePoints;
  };

  protected setAzimuth = (points: Point[]): void => {
    const inverse = this.geodesic.inverse(
      points[0].lon,
      points[0].lat,
      points[points.length - 1].lon,
      points[points.length - 1].lat,
    );
    this.fwdAzimuth =
      inverse.azimuth >= 0 ? inverse.azimuth : 360 - Math.abs(inverse.azimuth);
    this.backAzimuth =
      this.fwdAzimuth > 180 ? this.fwdAzimuth - 180 : this.fwdAzimuth + 180;
    this.distanceAzimuth = inverse.distance;
  };
}