package holeg.ui.view.inspector;

import holeg.interfaces.GraphEditable.GraphType;
import holeg.interfaces.LocalMode;
import holeg.interfaces.TimelineDependent;
import holeg.model.HolonElement;
import holeg.model.Model;
import holeg.preferences.ColorPreference;
import holeg.ui.controller.Control;
import holeg.utility.listener.ResizeListener;
import holeg.utility.math.Maths;
import holeg.utility.math.vector.Vec2f;
import holeg.utility.math.vector.Vec2i;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Cursor;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.geom.Path2D;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.ListIterator;
import java.util.Optional;
import java.util.Set;
import java.util.logging.Logger;
import javax.swing.JPanel;


/**
 * This Class represents a Graph where the User can model the behavior of elements and switches over
 * time.
 */
public class UnitGraph extends JPanel implements MouseListener, MouseMotionListener{

  private static final Logger log = Logger.getLogger(UnitGraph.class.getName());
  // Normal Settings
  private static final int border = 4;
  private static final int clickThresholdSquared = 25;

  // Display Settings
  /**
   * The size of a dot in the graph. It should be at least 1.
   */
  private static final int dotSize = 8;

  /**
   * The Color of a dot in the graph.
   */

  private final Control control;
  private final ArrayList<Series> seriesList = new ArrayList<>();
  private Vec2i editPosition;
  private Series actualSeries = null;
  private GlobalCurve globalCurve = null;
  private boolean editMode = false;
  private Set<HolonElement> elements;
  private int widthWithBorder, heightWithBorder;
  private EditPointType editPointType;

  /**
   * Constructor.
   *
   * @param control the Controller
   */
  public UnitGraph(Control control) {
    setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
    this.setBackground(Color.WHITE);
    this.control = control;
    this.addMouseListener(this);
    this.addMouseMotionListener(this);
    this.addComponentListener((ResizeListener) e -> {
      calculateWidthHeight();
      updateRepresentativePositions();
      repaint();
    });
    control.OnCanvasUpdate.addListener(this::repaint);
  }

  /**
   * When the UnitGraph should represent a new GraphEditable Element. Its Updates the Graph and give
   * access to the Element.
   *
   * @param element a series
   */
  public void addNewSeries(TimelineDependent element) {
    Series series = new Series();
    overrideUnitGraph(series, element.getStateGraph());
    series.element = element;
    series.type = element.getGraphType();
    series.color = ColorPreference.UnitGraph.SeriesColorArray[element.hashCode()
        % ColorPreference.UnitGraph.SeriesColorArray.length];
    seriesList.add(series);
    repaint();
  }

  /**
   * Removes all series from the graph.
   */
  public void clearSeries() {
    seriesList.clear();
    repaint();
  }

  public void setGlobalCurve(Set<HolonElement> elements) {
    if (elements == null || elements.isEmpty()) {
      this.globalCurve = null;
      return;
    }
    GlobalCurve curve = new GlobalCurve();
    curve.maxEnergy = elements.stream().map(HolonElement::getEnergy).filter(energy -> energy > 0)
        .reduce(0.0f,
            Float::sum);
    curve.minEnergy = elements.stream().map(HolonElement::getEnergy).filter(energy -> energy < 0)
        .reduce(0.0f,
            Float::sum);
    Model model = control.getModel();
    float[] sample = new float[model.getMaxIterations()];
    // sample energy
    for (HolonElement element : elements) {
      for (int i = 0; i < model.getMaxIterations(); i++) {
        sample[i] += element.calculateExpectedEnergyAtTimeStep(i);
      }
    }

    // sample curve
    for (int i = 0; i < model.getMaxIterations(); i++) {
      curve.points.add(new UnitGraphPoint((double) i / (double) model.getMaxIterations(),
          Maths.invLerp(curve.minEnergy, curve.maxEnergy, sample[i]), false));
    }
    // update displayPosition
    for (UnitGraphPoint p : curve.points) {
      p.calcDisplayedPosition(border, widthWithBorder, heightWithBorder);
    }
    double zeroLineYPos = Maths.invLerp(curve.minEnergy, curve.maxEnergy, 0.0);
    curve.zeroLinePoints.add(new UnitGraphPoint(0.0, zeroLineYPos, false));
    curve.zeroLinePoints.add(new UnitGraphPoint(1.0, zeroLineYPos, false));
    for (UnitGraphPoint p : curve.zeroLinePoints) {
      p.calcDisplayedPosition(border, widthWithBorder, heightWithBorder);
    }
    // set global curve
    this.globalCurve = curve;
    this.elements = elements;

  }

  private void updateGlobalCurve() {
    setGlobalCurve(this.elements);
  }

  /**
   * Paints the Graph, the Grid, the actual Line from the currentIteration
   *
   * @param g Graphics
   */
  public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2d = (Graphics2D) g;
    drawGrid(g2d);
    g2d.setColor(Color.BLACK);
    g2d.setRenderingHints(
        new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON));
    g2d.setStroke(new BasicStroke(2f));
    drawUnitGraph(g2d);
    g2d.setColor(ColorPreference.UnitGraph.DotColor);
    if (editMode) {
      drawUnitGraphPointsReleased(g2d);
    } else {
      drawUnitGraphPoints(g2d);
    }
    g2d.setColor(ColorPreference.UnitGraph.DotColor);
    g2d.setStroke(new BasicStroke(1));
    drawCurrentIterationLine(g2d);
    g2d.setStroke(
        new BasicStroke(1, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_ROUND, 1.0f, new float[]{6},
            3));
    Optional.ofNullable(this.globalCurve).ifPresent(curve -> {
      g2d.setColor(ColorPreference.UnitGraph.GlobalCurveColor);
      drawDoubleGraph(g2d, curve.points);
      g2d.setColor(ColorPreference.UnitGraph.ZeroLineColor);
      g2d.setStroke(new BasicStroke(1));
      drawDoubleGraph(g2d, curve.zeroLinePoints);
    });
  }

  /**
   * Helper Method to draw the UnitGraphPanel. {@link UnitGraph#paintComponent(Graphics)}
   * <p>
   * This Methods draws the UnitGraph whether its a boolGraph or a doubleGraph.
   *
   * @param g to draw.
   */
  private void drawUnitGraph(Graphics2D g) {
    boolean drawSnappingHintFlag = false;
    for (Series series : this.seriesList) {
      g.setColor(series.color);
      switch (series.type) {
        case boolGraph:
					if (editMode) {
						drawBoolGraphInEditMode(g, series);
						drawSnappingHintFlag = true;
					} else {
						drawBoolGraph(g, series);
					}
          break;
        case doubleGraph:
					if (editMode) {
						drawDoubleGraphInEditMode(g, series);
					} else {
						drawDoubleGraph(g, series.points);
					}
          break;
        default:
          throw new UnsupportedOperationException();
      }
    }
    if (drawSnappingHintFlag) {
      drawSnappingHint(g);
    }

  }

  /**
   * Helper Method to draw the UnitGraphPanel. {@link UnitGraph#paintComponent(Graphics)}
   * <p>
   * This Methods draws the UnitGraphPoints of the UnitGraph.
   *
   * @param g to draw.
   */
  private void drawUnitGraphPoints(Graphics2D g) {
    g.setColor(ColorPreference.UnitGraph.DotColor);
    for (Series series : seriesList) {
      for (UnitGraphPoint p : series.points) {
        drawDot(g, p.displayedPosition);
      }
    }

  }

  /**
   * Helper Method to draw the UnitGraphPanel. {@link UnitGraph#paintComponent(Graphics)}
   * <p>
   * This Methods draws the UnitGraphPoints of the UnitGraph when its in EditMode.
   *
   * @param g to draw.
   */
  private void drawUnitGraphPointsReleased(Graphics2D g) {
    drawUnitGraphPoints(g);
    g.setColor(ColorPreference.UnitGraph.EditDotColor);
    drawDot(g, editPosition);
  }

  // Draw Methods only to let the User see the changes. Nothing its saved here or
  // changed.

  /**
   * Helper Method to draw the UnitGraphPanel. {@link UnitGraph#paintComponent(Graphics)}
   * <p>
   * This Methods draws the Grid on the Canvas.
   *
   * @param g to draw.
   */
  private void drawGrid(Graphics2D g) {
    g.setStroke(new BasicStroke(1));
    g.setColor(Color.lightGray);
    int amountOfLines = 10;
    int width = widthWithBorder + 2 * border;
    int height = heightWithBorder;
    for (int i = 0; i <= amountOfLines; i++) {
      int linehieght = (int) (((double) i / (double) amountOfLines) * (double) height) + border;
      g.drawLine(0, linehieght, width, linehieght);
    }
  }

  /**
   * Helper Method to draw the UnitGraphPanel. {@link UnitGraph#paintComponent(Graphics)}
   * <p>
   * This Method draws the CurrentIterationLine.
   *
   * @param g to draw.
   */
  private void drawCurrentIterationLine(Graphics2D g) {
    Model model = control.getModel();
    int cur = model.getCurrentIteration();
    int max = model.getMaxIterations();
    if (isLocalPeriedDifferentInSeries()) {
      for (Series series : seriesList) {
        double where = switch (series.element.getPeriod().getType()) {
          case Local -> {
            int interval = series.element.getPeriod().getInterval();
            yield ((double) cur % interval) / ((double) interval);
          }
          case Global -> ((double) cur) / ((double) max);
        };
        Vec2i oben = new Vec2i(border + (int) (where * widthWithBorder), 0);
        Vec2i unten = new Vec2i(border + (int) (where * widthWithBorder),
            2 * border + heightWithBorder);
        g.setColor(series.color);
        drawLine(g, oben, unten);
      }
    } else {
      double where;
      if (!isUsingLocalPeriod()) {
        where = ((double) cur) / ((double) max);
      } else {
        int lPeriod = getFirstLocalPeriod();
        where = ((double) cur % lPeriod) / ((double) lPeriod);
      }
      Vec2i upPoint = new Vec2i(border + (int) (where * widthWithBorder), 0);
      Vec2i downPoint = new Vec2i(border + (int) (where * widthWithBorder),
          2 * border + heightWithBorder);
      g.setColor(ColorPreference.UnitGraph.DotColor);
      drawLine(g, upPoint, downPoint);
    }

  }

  /**
   * Helper Method to draw the UnitGraphPanel. {@link UnitGraph#paintComponent(Graphics)}
   * <p>
   * This Method draws a line between two Positions on the Canvas.
   *
   * @param g     to draw.
   * @param start the Position of one end of the line to draw.
   * @param end   the other Ends Position of the Line to draw.
   */
  private void drawLine(Graphics2D g, Vec2i start, Vec2i end) {
    Path2D.Double path = new Path2D.Double();
    path.moveTo(start.getX(), start.getY());
    path.lineTo(end.getX(), end.getY());
    g.draw(path);
  }

  /**
   * Helper Method to draw the UnitGraphPanel. {@link UnitGraph#paintComponent(Graphics)}
   * <p>
   * Initialize a Cubic BezierCurve.
   *
   * @param start The Position to start the Curve.
   */
  private Path2D.Double initBezier(Vec2i start) {
    // Good Source for basic understanding for Bezier Curves
    // http://www.theappguruz.com/blog/bezier-curve-in-games
    Path2D.Double path = new Path2D.Double();
    path.moveTo(start.getX(), start.getY());
    return path;
  }

  /**
   * Helper Method to draw the UnitGraphPanel. {@link UnitGraph#paintComponent(Graphics)}
   * <p>
   * Calculate the Path of a the Cubic BezierCurve with the special controlPoints to make the wanted
   * behavior.
   *
   * @param path   the path of the Bezier.
   * @param actual the actual Position of the Path.
   * @param target the end Position of the Curve.
   */
  private void curveTo(Path2D.Double path, Vec2i actual, Vec2i target) {
    double mitte = (actual.getX() + target.getX()) * 0.5;
    path.curveTo(mitte, actual.getY(), mitte, target.getY(), target.getX(), target.getY());
  }

  /**
   * Helper Method to draw the UnitGraphPanel. {@link UnitGraph#paintComponent(Graphics)}
   * <p>
   * Draws a Dot at a Position.
   *
   * @param g to draw.
   * @param p the position of the Dot.
   */
  private void drawDot(Graphics2D g, Vec2i p) {
    g.fillOval(p.getX() - dotSize / 2, p.getY() - dotSize / 2, dotSize, dotSize);
  }

  /**
   * Helper Method to draw the UnitGraphPanel. {@link UnitGraph#paintComponent(Graphics)}
   * <p>
   * This Method draws the UnitGraph as BoolGraph.
   *
   * @param g to draw.
   */
  private void drawBoolGraph(Graphics2D g, Series series) {
		if (series.points.size() <= 1) {
			return;
		}
    LinkedList<Vec2i> cornerPoints = new LinkedList<>();
    ListIterator<UnitGraphPoint> iter = series.points.listIterator();
    Vec2i actual = series.points.getFirst().displayedPosition;
    Path2D.Double path = new Path2D.Double();
    path.moveTo(actual.getX(), actual.getY());
    while (iter.hasNext()) {
      Vec2i target = iter.next().displayedPosition;
      // BooleanConnection
      path.lineTo(target.getX(), actual.getY()); // line to corner
      cornerPoints.add(new Vec2i(target.getX(), actual.getY())); // save corner
      path.lineTo(target.getX(), target.getY()); // line to next Point

      actual = target;
    }
    g.draw(path);
    // Draw the Points on the Corner that dont exist in Data but should be visual
    g.setColor(ColorPreference.UnitGraph.DotColor);
    for (Vec2i p : cornerPoints) {
      drawDot(g, p);
    }

  }

  /**
   * Helper Method to draw the UnitGraphPanel. {@link UnitGraph#paintComponent(Graphics)}
   * <p>
   * This Method draws the UnitGraph as BoolGraph in EditMode.
   *
   * @param g to draw.
   */
  private void drawBoolGraphInEditMode(Graphics2D g, Series series) {
    LinkedList<Vec2i> before = new LinkedList<>();
    LinkedList<Vec2i> after = new LinkedList<>();
    for (UnitGraphPoint p : series.points) {
			if (p.displayedPosition.getX() < editPosition.getX()) {
				before.add(p.displayedPosition);
			} else {
				after.add(p.displayedPosition);
			}
    }
    g.setColor(series.color);
    drawBoolGraphFromList(g, before);
    g.setColor(series.color);
    drawBoolGraphFromList(g, after);
    // EditGraph
    LinkedList<Vec2i> middle = new LinkedList<>();
		if (!before.isEmpty()) {
			middle.add(before.getLast());
		}
    middle.add(editPosition);
		if (!after.isEmpty()) {
			middle.add(after.getFirst());
		}

    g.setColor(ColorPreference.UnitGraph.EditDotColor);
    drawBoolGraphFromList(g, middle);

  }

  /**
   * Helper Method to draw the UnitGraphPanel. {@link UnitGraph#paintComponent(Graphics)}
   * <p>
   * This Method draws a red Hint to signal the User the snapping of the hovered Point under the
   * Cursor in EditMode.
   *
   * @param g to draw.
   */
  private void drawSnappingHint(Graphics2D g) {
    // ColorHint
    g.setColor(Color.RED);
    // Threshhold Line
    final float[] dash1 = {10.0f};
    final BasicStroke dashed = new BasicStroke(2.0f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER,
        10.0f, dash1,
        0.0f);
    g.setStroke(dashed);

    int halfheight = border + heightWithBorder / 2;
    g.drawLine(0, halfheight, widthWithBorder + 2 * border, halfheight);
    // Threshhold Text
    g.drawString("Snapping Threshold", 10, halfheight - 2);
  }

  /**
   * Helper Method to draw the UnitGraphPanel. {@link UnitGraph#paintComponent(Graphics)}
   * <p>
   * This Method draws a partial Graph from a Position List as BoolGraph.
   *
   * @param g    to draw.
   * @param list the PositionList to draw a BoolGraph
   */
  private void drawBoolGraphFromList(Graphics2D g, LinkedList<Vec2i> list) {
		if (list.size() <= 1) {
			return;
		}
    ListIterator<Vec2i> iter = list.listIterator();
    LinkedList<Vec2i> cornerPoints = new LinkedList<>();
    Vec2i actual = list.getFirst();
    Path2D.Double path = new Path2D.Double();
    path.moveTo(actual.getX(), actual.getY());
    while (iter.hasNext()) {
      Vec2i target = iter.next();
      // BooleanConnection
      path.lineTo(target.getX(), actual.getY()); // line to corner
      cornerPoints.add(new Vec2i(target.getX(), actual.getY())); // save corner
      path.lineTo(target.getX(), target.getY()); // line to next Point
      actual = target;
    }
    g.draw(path);
    g.setColor(ColorPreference.UnitGraph.DotColor);
    for (Vec2i p : cornerPoints) {
      drawDot(g, p);
    }
  }

  /**
   * Helper Method to draw the UnitGraphPanel. {@link UnitGraph#paintComponent(Graphics)}
   * <p>
   * This Method draws the UnitGraph as DoubleGraph.
   *
   * @param g to draw.
   */
  private void drawDoubleGraph(Graphics2D g, List<UnitGraphPoint> points) {
		if (points.isEmpty()) {
			return;
		}
    ListIterator<UnitGraphPoint> iter = points.listIterator();
    Vec2i actual = iter.next().displayedPosition;
    Path2D.Double path = this.initBezier(actual);
    while (iter.hasNext()) {
      Vec2i target = iter.next().displayedPosition;
      this.curveTo(path, actual, target);
      actual = target;
    }
    g.draw(path);

  }

  /**
   * Helper Method to draw the UnitGraphPanel. {@link UnitGraph#paintComponent(Graphics)}
   * <p>
   * This Method draws the UnitGraph as DoubleGraph in EditMode.
   *
   * @param g to draw.
   */
  private void drawDoubleGraphInEditMode(Graphics2D g, Series series) {
    LinkedList<Vec2i> before = new LinkedList<>();
    LinkedList<Vec2i> after = new LinkedList<>();
    for (UnitGraphPoint p : series.points) {
			if (p.displayedPosition.getX() < editPosition.getX()) {
				before.add(p.displayedPosition);
			} else {
				after.add(p.displayedPosition);
			}
    }
    drawUnitGraphFromList(g, before);
    drawUnitGraphFromList(g, after);
    // EditGraph
    LinkedList<Vec2i> middle = new LinkedList<>();
		if (!before.isEmpty()) {
			middle.add(before.getLast());
		}
    middle.add(editPosition);
		if (!after.isEmpty()) {
			middle.add(after.getFirst());
		}

    g.setColor(ColorPreference.UnitGraph.EditDotColor);
    drawUnitGraphFromList(g, middle);
  }

  /**
   * Helper Method to draw the UnitGraphPanel. {@link UnitGraph#paintComponent(Graphics)}
   * <p>
   * This Method draws a partial Graph from a Position List as DoubleGraph.
   *
   * @param g    to draw.
   * @param list the PositionList to draw a DoubleGraph
   */
  private void drawUnitGraphFromList(Graphics2D g, LinkedList<Vec2i> list) {
		if (list.size() <= 1) {
			return;
		}
    ListIterator<Vec2i> iter = list.listIterator();
    Vec2i actual = list.getFirst();
    Path2D.Double path = this.initBezier(actual);
    while (iter.hasNext()) {
      Vec2i target = iter.next();
      curveTo(path, actual, target);
      actual = target;
    }
    g.draw(path);
  }

  /**
   * A unitgraphpoint have a x and y position to store the data of a graph point. Also it have a
   * displayposition to store the Position of the GraphPoints on the Canvas. e.g. when the canvas
   * has 500 width and 200 height a GraphPoint with the X=0.5 and Y=1.0 should have a
   * displayposition of (250,3) when border is 3.
   */
  private void updateRepresentativePositions() {
    for (Series series : seriesList) {
      for (UnitGraphPoint p : series.points) {
        p.calcDisplayedPosition(border, widthWithBorder, heightWithBorder);
      }
    }
    Optional.ofNullable(this.globalCurve).ifPresent(curve -> {
      for (UnitGraphPoint p : curve.points) {
        p.calcDisplayedPosition(border, widthWithBorder, heightWithBorder);
      }
      for (UnitGraphPoint p : curve.zeroLinePoints) {
        p.calcDisplayedPosition(border, widthWithBorder, heightWithBorder);
      }
    });

  }

  /**
   * Takes a List of GraphPoints and convert it to the actual UnitGraphPoints with displayposition
   * in the {@link #seriesList}
   *
   * @param stateCurve the list of GraphPoint
   */
  private void overrideUnitGraph(Series series, LinkedList<Vec2f> stateCurve) {
    series.points.clear();
    for (Vec2f p : stateCurve) {
      UnitGraphPoint point = new UnitGraphPoint(p);
      point.calcDisplayedPosition(border, widthWithBorder, heightWithBorder);
      series.points.add(point);
    }
  }

  /**
   * When the PanelSize Change the width and height to calculate the drawings have to be adjusted.
   */
  private void calculateWidthHeight() {
    widthWithBorder = this.getWidth() - 2 * border;
    heightWithBorder = this.getHeight() - 2 * border;
  }

  // Under the hood functions to calculate and function the

  /**
   * Save the actualGraphPoint List to the GraphEditable Element.
   */
  private void saveGraph() {
    for (Series series : seriesList) {
      LinkedList<Vec2f> actual = series.element.getStateGraph();
      actual.clear();
      for (UnitGraphPoint p : series.points) {
        actual.add(p.getPoint());
      }
      series.element.sampleGraph();
    }
  }

  /**
   * Remove a UnitGraphPoint from the UnitGraphPoint list ({@link #seriesList} when its near a given
   * Position.
   *
   * @param mPosition the position
   */
  private void removePointNearPosition(Series series, Vec2i mPosition) {
    ListIterator<UnitGraphPoint> iter = series.points.listIterator();
    while (iter.hasNext()) {
      if (near(mPosition, iter.next().displayedPosition, series.type)) {
        iter.remove();
        break;
      }
    }

  }

  private void removePointsNearPosition(Vec2i mPosition) {
    for (Series series : seriesList) {
      removePointNearPosition(series, mPosition);
    }
  }

  private Optional<Series> detectSeries(Vec2i mPosition) {
    return seriesList.stream().min((a, b) -> {
      float minDistanceA = a.points.stream()
          .map(point -> point.displayedPosition.getSquaredDistance(mPosition))
          .min(Float::compare).get();
      float minDistanceB = b.points.stream()
          .map(point -> point.displayedPosition.getSquaredDistance(mPosition))
          .min(Float::compare).get();
      return Float.compare(minDistanceA, minDistanceB);
    });
  }

  /**
   * Determine if the Point is a StartPoint , EndPoint or a NormalPoint a.k.a. in between Points.
   *
   * @param mPosition The Position to check.
   */
  private EditPointType detectStartEndPoint(Series series, Vec2i mPosition) {
    UnitGraphPoint first = series.points.getFirst();
    UnitGraphPoint last = series.points.getLast();
		if (near(mPosition, first.displayedPosition, series.type)) {
			return EditPointType.StartPoint;
		} else if (near(mPosition, last.displayedPosition, series.type)) {
			return EditPointType.EndPoint;
		} else {
			return EditPointType.Normal;
		}
  }

  /**
   * Determine if a Point is near the Cursor (depends on Mode what near means). To detect if it
   * should grab the Point or create a new Point.
   */
  private boolean near(Vec2i actual, Vec2i target, GraphType graphType) {
    switch (graphType) {
      case boolGraph: // Distance only with X
        int xDis = target.getX() - actual.getX();
        return xDis * xDis < clickThresholdSquared;
      case doubleGraph:
        return actual.getSquaredDistance(target) < clickThresholdSquared;
      default:
        return false;
    }
  }

  /**
   * When the Mouse Drag a Point it updates each time the position.
   */
  private void updateEditPointPosition(Vec2i newPosition, EditPointType editPointType,
      GraphType graphType) {
    // make it in the bounds of the UnitGraph no Point out of the Border
    Vec2i currentPosition = setInBounds(newPosition);
    if (editPointType != EditPointType.Normal) {
      attachToBorder(currentPosition, editPointType);
    }
    if (graphType == GraphType.boolGraph) {
      snapBoolean(currentPosition);
    }
    editPosition = currentPosition;
  }

  /**
   * No Point on the UnitGraph should exit the UnitGraph.
   *
   * @param p the Position
   * @return the updated Position.
   */
  private Vec2i setInBounds(Vec2i p) {
    p.clampX(border, border + widthWithBorder);
    p.clampY(border, border + heightWithBorder);
    return p;
  }

  /**
   * For Switches the Point have to be Snap to the Top or the Bottem.
   *
   * @param p the Position
   */
  private void snapBoolean(Vec2i p) {
    if (p.getY() < border + heightWithBorder / 2) {
      p.setY(border);
    } else {
      p.setY(border + heightWithBorder);
    }
  }

  /**
   * The First Point has to be at 0(LeftSide) and Last Point has to be at 1(RightSide).
   *
   * @param p the Position
   */
  private void attachToBorder(Vec2i p, EditPointType editPointType) {
    switch (editPointType) {
      case StartPoint -> p.setX(border);
      case EndPoint -> p.setX(border + widthWithBorder);
    }
  }

  /**
   * Insert a Position in the UnitGraphList at the right order. Its sorted based on the xValues.
   *
   * @param pos The new UnitGraphPoints Position
   */
  private void insertNewGraphPoint(Series series, Vec2i pos) {
    setInBounds(pos);
    ListIterator<UnitGraphPoint> iter = series.points.listIterator();
    while (iter.hasNext()) {
      Vec2i tempPosition = iter.next().displayedPosition;
      if (pos.getX() <= tempPosition.getX()) {
        // previous to go back a position to make the new point before the the Position
        // with greater X
        iter.previous();
        iter.add(generateUnitGraphPoint(pos));
        break;
      }
    }
    if (!iter.hasNext()) // if behind last point
    {
      iter.add(generateUnitGraphPoint(pos));
    }
  }

  /**
   * Generate a UnitGraphPoint from a normal Position in the UnitGraph.
   *
   * @param pos the normal pos with xValues from 0..Width and yValues from 0..Height
   * @return a UnitGraphPoint
   */
  private UnitGraphPoint generateUnitGraphPoint(Vec2i pos) {
    UnitGraphPoint temp = new UnitGraphPoint(
        (double) (pos.getX() - border) / (double) widthWithBorder,
        1 - (double) (pos.getY() - border) / (double) heightWithBorder, true);
    temp.displayedPosition = pos;
    return temp;
  }

  /**
   * Update the Point Position
   */
  @Override
  public void mouseDragged(MouseEvent e) {
    Optional.ofNullable(this.actualSeries).ifPresent(series -> {
      updateEditPointPosition(new Vec2i(e.getPoint().x, e.getPoint().y), this.editPointType,
          series.type);
      updateGlobalCurve();
      repaint();
    });

  }

  @Override
  public void mouseMoved(MouseEvent e) {
  }

  @Override
  public void mouseClicked(MouseEvent e) {
  }

  @Override
  public void mouseEntered(MouseEvent e) {
  }

  @Override
  public void mouseExited(MouseEvent e) {
  }

  /**
   * The First Step. When LeftMouseButton its checks if a point is to grab under the cursor or
   * create a new Point. Then enter EditMode. When RightMouseButton its delete a point if its under
   * the Curser.
   */
  @Override
  public void mousePressed(MouseEvent e) {
    Vec2i mPosition = new Vec2i(e.getPoint().x, e.getPoint().y);
    detectSeries(mPosition).ifPresent(series -> {
      actualSeries = series;
      if (e.getButton() == MouseEvent.BUTTON3) {
        // RightMouseButtonEvent
        editPointType = detectStartEndPoint(series, mPosition);
        if (editPointType == EditPointType.Normal) {
          removePointsNearPosition(mPosition);
          repaint();
        }
        editMode = false;

      } else if (e.getButton() == MouseEvent.BUTTON1) {
        // LeftMouseButtonEvent
        editPointType = detectStartEndPoint(series, mPosition);
        removePointsNearPosition(mPosition);
        updateEditPointPosition(mPosition, editPointType, series.type);
        editMode = true;
        repaint();
      }
    });

  }

  /**
   * The last step to save the Changes. Its insert the Hovering Point and exit EditMode.
   */
  @Override
  public void mouseReleased(MouseEvent e) {
    if (editMode && actualSeries != null) {
      for (Series series : seriesList) {
        this.insertNewGraphPoint(series, editPosition);
      }
      editMode = false;
    }
    saveGraph();
    updateGlobalCurve();
    repaint();
  }

  /**
   * Resets the graph to normal.
   */
  public void reset() {
    for (Series series : seriesList) {
      series.element.reset();
      overrideUnitGraph(series, series.element.getStateGraph());
    }
    repaint();
  }

  /**
   * set the local period of all selected series elements.
   * @param period the period
   */
  public void setPeriod(LocalMode.Period period) {
    for (Series series : seriesList) {
      series.element.setPeriod(new LocalMode.Period(period));
    }
  }

  /**
   * Check if selected series are different from another.
   * @return true or false
   */
  public boolean isLocalPeriedDifferentInSeries() {
    return seriesList.stream().map(series -> series.element.getPeriod().getInterval()).distinct()
        .count() > 1;
  }

  /**
   * Returns the local period of the first series
   * @return the first series local period
   */
  public int getFirstLocalPeriod() {
    return seriesList.isEmpty() ? 0 : seriesList.get(0).element.getPeriod().getInterval();
  }

  /**
   * Check if using the local period of the series.
   * @return true or false
   */
  public boolean isUsingLocalPeriod() {
    return seriesList.stream().anyMatch(
        series -> series.element.getPeriod().getType() != LocalMode.Period.PeriodType.Global);
  }

  private enum EditPointType {
    Normal, StartPoint, EndPoint
  }

  // Intern Variables
  private static class Series {

    public LinkedList<UnitGraphPoint> points = new LinkedList<>();
    public TimelineDependent element;
    public GraphType type;
    public Color color;
  }

  private static class GlobalCurve {

    public LinkedList<UnitGraphPoint> points = new LinkedList<>();
    public float minEnergy;
    public float maxEnergy;
    public LinkedList<UnitGraphPoint> zeroLinePoints = new LinkedList<>();
  }

}