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package garten.model;

/**
 *
 * @author Jan
 */
import java.text.CharacterIterator;
import java.util.ArrayList;
import java.util.Collections;
import lsystem.Grammar;
import lsystem.collection.TurtleStack;
import lsystem.turtle.Turtle;

public class PflanzeImpl implements Pflanze
{
  ArrayList<float[]> pts;
  protected float DELTA; // 18 degrees
  protected Grammar grammar;
  final protected String axiom = "F";
  protected int generations;
  //protected String rule;
  protected float startLength;
  protected float drawLength;
  protected float theta;
  protected float xpos;
  protected float ypos;

  protected int positionx;
  protected int positiony;

  protected int flaeche;

  protected float[] boundingBoxes;
  ArrayList<Float> tempx;
  ArrayList<Float> tempy;
  //Position();
  TurtleStack ts;

  public PflanzeImpl(int xstart, int ystart, int generation, int startLength)
  {
    this.positionx = xstart;
    this.positiony = ystart;
    this.generations = generation;
    this.startLength = startLength;
    pts = new ArrayList<float[]>();
    ts = new TurtleStack();
    boundingBoxes=new float[4]; //minx, miny, maxx, maxy
    tempx = new ArrayList<>();
    tempy = new ArrayList<>();
  }

  public void translateRules()
  {

    float x_temp, y_temp;
    Turtle turtle = new Turtle(positionx, positiony, (float) ((Math.PI) / 2));
    CharacterIterator it = grammar.getIterator();
    for (char ch = it.first(); ch != CharacterIterator.DONE; ch = it.next())
    {
      switch (ch)
      {
        case 'F':
          x_temp = turtle.getX();
          y_temp = turtle.getY();
          turtle.setX((float) (x_temp + drawLength * Math.cos((turtle.getTheta()))));
          turtle.setY((float) (y_temp - drawLength * Math.sin((turtle.getTheta()))));
          float[] temp =
          {
            x_temp, y_temp, turtle.getX(), turtle.getY()
          };
          tempx.add(x_temp);
          tempx.add(turtle.getX());
          tempy.add(y_temp);
          tempy.add(turtle.getY());

          pts.add(temp);

          break;
        case '+':
          turtle.setTheta(turtle.getTheta() + DELTA);
          break;
        case '-':
          turtle.setTheta(turtle.getTheta() - DELTA);
          break;
        case '[':
          ts.push(new Turtle(turtle)); // Uncomment this (and comment previous line to avoid using clone) 
          break;
        case ']':
          turtle = ts.pop();
          break;
        default:
          System.err.println("character " + ch + " not in grammar");
      }
    }
     setBoundingBoxes();
  }

  void setBoundingBoxes()       
  { 
    boundingBoxes[0]  = Collections.min(tempx);
    boundingBoxes[1]  = Collections.min(tempy);
    boundingBoxes[2]  = Collections.max(tempx);
    boundingBoxes[3]  = Collections.max(tempy); 
  }
  public float [] getBoundingBoxes()
  {
    return boundingBoxes;
  }

  @Override
  public ArrayList<float[]> getPoints()
  {

    return pts;
  }

  @Override
  public int getPositionx()
  {
    return positionx;
  }

  @Override
  public int getPositiony()
  {
    return positiony;
  }

  @Override
  public void setPositionx(int x)
  {
    positionx = x;
  }

  @Override
  public void setPositiony(int y)
  {
    positiony = y;
  }

  @Override
  public int getflaeche()
  {
    return flaeche;
  }

  @Override
  public void setAlgorithm()
  {
    pts.removeAll(pts);
    translateRules();
  }

  public void setPosition()
  {
  }

  @Override
  public void setflaeche(int flaeche)
  {
  }

}