package jalview.viewmodel;

import jalview.datamodel.AlignmentColsCollection;
import jalview.datamodel.AlignmentI;
import jalview.datamodel.AlignmentRowsCollection;
import jalview.datamodel.ColumnSelection;
import jalview.datamodel.HiddenSequences;

import java.awt.Graphics;

public abstract class OverviewDimensions
{

  private static final int DEFAULT_GRAPH_HEIGHT = 20;
  protected static final int MAX_WIDTH = 400;
  protected static final int MIN_WIDTH = 120;
  protected static final int MIN_SEQ_HEIGHT = 40;
  protected static final int MAX_SEQ_HEIGHT = 300;
  protected int width;
  protected int sequencesHeight;
  protected int graphHeight = DEFAULT_GRAPH_HEIGHT;
  protected int boxX = -1;
  protected int boxY = -1;
  protected int boxWidth = -1;
  protected int boxHeight = -1;
  protected int scrollCol = -1;
  protected int scrollRow = -1;

  public OverviewDimensions(ViewportRanges ranges,
          boolean showAnnotationPanel)
  {
    // scale the initial size of overviewpanel to shape of alignment
    float initialScale = (float) ranges.getAbsoluteAlignmentWidth()
            / (float) ranges.getAbsoluteAlignmentHeight();

    if (!showAnnotationPanel)
    {
      graphHeight = 0;
    }

    if (ranges.getAbsoluteAlignmentWidth() > ranges
            .getAbsoluteAlignmentHeight())
    {
      // wider
      width = MAX_WIDTH;
      sequencesHeight = Math.round(MAX_WIDTH / initialScale);
      if (sequencesHeight < MIN_SEQ_HEIGHT)
      {
        sequencesHeight = MIN_SEQ_HEIGHT;
      }
    }
    else
    {
      // taller
      width = Math.round(MAX_WIDTH * initialScale);
      sequencesHeight = MAX_SEQ_HEIGHT;

      if (width < MIN_WIDTH)
      {
        width = MIN_WIDTH;
      }
    }
  }

  /**
   * Draw the overview panel's viewport box on a graphics object
   * 
   * @param g
   *          the graphics object to draw on
   */
  public void drawBox(Graphics g)
  {
    g.drawRect(boxX, boxY, boxWidth, boxHeight);
    g.drawRect(boxX + 1, boxY + 1, boxWidth - 2, boxHeight - 2);
  }

  public int getScrollCol()
  {
    return scrollCol;
  }

  public int getScrollRow()
  {
    return scrollRow;
  }

  public int getBoxX()
  {
    return boxX;
  }

  public int getBoxY()
  {
    return boxY;
  }

  public int getBoxWidth()
  {
    return boxWidth;
  }

  public int getBoxHeight()
  {
    return boxHeight;
  }

  public void setWidth(int w)
  {
    width = w;
  }

  public void setHeight(int h)
  {
    sequencesHeight = h - graphHeight;
  }

  public int getWidth()
  {
    return width;
  }

  public int getHeight()
  {
    return sequencesHeight + graphHeight;
  }

  public int getSequencesHeight()
  {
    return sequencesHeight;
  }

  public int getGraphHeight()
  {
    return graphHeight;
  }

  public abstract void updateViewportFromMouse(int mousex, int mousey,
          HiddenSequences hiddenSeqs, ColumnSelection hiddenCols,
          ViewportRanges ranges);

  public abstract void setBoxPosition(HiddenSequences hiddenSeqs,
          ColumnSelection hiddenCols, ViewportRanges ranges);

  public abstract AlignmentColsCollection getColumns(
          ViewportRanges ranges, ColumnSelection hiddenCols);

  public abstract AlignmentRowsCollection getRows(
          ViewportRanges ranges, AlignmentI al);

  public abstract float getPixelsPerCol();

  public abstract float getPixelsPerSeq();
}