package Presenter.Generator;

import Model.Line;

import java.util.LinkedList;
import java.util.Observable;
import java.util.Random;

/**
 * Implementierung verschiedener Algorithmen zur Berechnung von Ausgleichsgeraden.
 *
 * @Author: Armin Wolf
 * @Email: a_wolf28@uni-muenster.de
 * @Date: 01.08.2017.
 */
public class DatasetGenerator extends Observable{

    private Double m;
    private Double b;
    private Random random;

    public DatasetGenerator(Double m, Double b){
        this.m = m;
        this.b = b;
        random = new Random();
        random.setSeed(9999);
    }

    public DatasetGenerator(){
        random = new Random();
    }


    public LinkedList<Line> generateDataset(){
        LinkedList<Line> lines = new LinkedList<>();
        m = 1 + random.nextDouble();
        b = random.nextDouble();


        for (int i=1;i<101;i++){
            double y = (random.nextGaussian() * 100) % 100;
            double signal = m * i + b;
            signal *= -1;

            Line line = new Line((double) i, signal - y);
            line.setId(i-1+"");
            lines.add(line);
        }
        String[] ret = {"generator","Es wurden "+100+" Daten generiert mit den Parametern",
                        "</br> <b>m</b> = "+m+"",
                        "</br> <b>b</b> = "+b+""};
        setChanged();
        notifyObservers(ret);
        return lines;
    }

}