/**
 * 
 */
package at.gv.egiz.pdfas.impl.api;

import at.gv.egiz.pdfas.api.sign.pos.SignaturePositioning;
import at.gv.egiz.pdfas.api.sign.pos.axis.AbsoluteAxisAlgorithm;
import at.gv.egiz.pdfas.api.sign.pos.axis.AutoAxisAlgorithm;
import at.gv.egiz.pdfas.api.sign.pos.axis.AxisAlgorithm;
import at.gv.egiz.pdfas.api.sign.pos.page.AbsolutePageAlgorithm;
import at.gv.egiz.pdfas.api.sign.pos.page.AutoPageAlgorithm;
import at.gv.egiz.pdfas.api.sign.pos.page.NewPageAlgorithm;
import at.gv.egiz.pdfas.api.sign.pos.page.PageAlgorithm;
import at.knowcenter.wag.egov.egiz.PdfAS;
import at.knowcenter.wag.egov.egiz.exceptions.PDFDocumentException;
import at.knowcenter.wag.egov.egiz.pdf.TablePos;

/**
 * @author wprinz
 * 
 */
public final class PosHelper
{
  /**
   * Hidden default constructor.
   */
  private PosHelper()
  {
    // empty block
  }

  public static TablePos formTablePos(SignaturePositioning signaturePositioning) throws PDFDocumentException
  {
    if (signaturePositioning == null)
    {
      return null;
    }

    String positioningString = formPositioningString(signaturePositioning);
    TablePos pos = PdfAS.parsePositionFromPosString(positioningString);

    return pos;
  }

  protected static String formPositioningString(SignaturePositioning sp)
  {
    String x_algo = formAxisAlgoString(sp.getXAlgorithm());
    String y_algo = formAxisAlgoString(sp.getYAlgorithm());
    String w_algo = formAxisAlgoString(sp.getWidthAlgorithm());
    String p_algo = formPageAlgoString(sp.getPageAlgorithm());
    String positioning = "x:" + x_algo + ";y:" + y_algo + ";w:" + w_algo + ";p:" + p_algo + ";f:" + sp.getFooterLine();
    return positioning;
  }

  protected static String formAxisAlgoString(AxisAlgorithm algorithm)
  {
    if (algorithm instanceof AutoAxisAlgorithm)
    {
      return "auto";
    }
    AbsoluteAxisAlgorithm aaa = (AbsoluteAxisAlgorithm) algorithm;
    return Float.toString(aaa.getAbsoluteValue());
  }

  protected static String formPageAlgoString(PageAlgorithm algorithm)
  {
    if (algorithm instanceof AutoPageAlgorithm)
    {
      return "auto";
    }
    if (algorithm instanceof NewPageAlgorithm)
    {
      return "new";
    }
    AbsolutePageAlgorithm apa = (AbsolutePageAlgorithm) algorithm;
    return Integer.toString(apa.getPage());
  }

}