package de.wwwu.awolf.model;

import org.apache.commons.math3.util.Precision;

import java.util.Objects;

/**
 * Implementierung verschiedener Algorithmen zur Berechnung von Ausgleichsgeraden.
 *
 * @Author: Armin Wolf
 * @Email: a_wolf28@uni-muenster.de
 * @Date: 28.05.2017.
 */
public class Point implements Comparable<Point> {

    private final double epsilon = 0.00001;

    private Double x;
    private Double y;
    private String id;

    /**
     * Konstruktor
     *
     * @param x x-Koordiante
     * @param y y-Koordiante
     */
    public Point(Double x, Double y) {
        this.x = x;
        this.y = y;
    }

    /**
     * Konstruktor
     *
     * @param x  x-Koordiante
     * @param y  y-Koordiante
     * @param id id des Punkts
     */
    public Point(Double x, Double y, String id) {
        this.x = x;
        this.y = y;
        this.id = id;
    }

    /**
     * @return x-Koordinate des Punkts
     */
    public Double getX() {
        return x;
    }

    /**
     * @param x x-Koordinate des Punkts
     */
    public void setX(Double x) {
        this.x = x;
    }

    /**
     * @return y-Koordinate des Punkts
     */
    public Double getY() {
        return y;
    }

    /**
     * @param y y-Koordinate des Punkts
     */
    public void setY(Double y) {
        this.y = y;
    }

    @Override
    public int compareTo(Point o) {
        if (Precision.compareTo(this.getX(), o.getX(), epsilon) == 0) {
            return this.getY().compareTo(o.getY());
        } else {
            return this.getX().compareTo(o.getX());
        }
    }

    /**
     * Vergleich zweier Punkte
     *
     * @param obj zu vergleichernder Punkt
     * @return <code>true</code> falls die Punkte gleich sind
     */
    @Override
    public boolean equals(Object obj) {
        if (obj instanceof Point) {
            Point other = (Point) obj;
            return Precision.equals(other.getX(), this.getX(), epsilon) && Precision.equals(other.getY(), this.getY(), epsilon);
        } else {
            return super.equals(obj);
        }
    }

    @Override
    public int hashCode() {
        return Objects.hash(Precision.round(x, 5), Precision.round(y, 5));
    }

    /**
     * @return id des Punkts
     */
    public String getId() {
        return id;
    }

    /**
     * @param id id des Punkts
     */
    public void setId(String id) {
        this.id = id;
    }


}