/* Distributed under the Apache License, Version 2.0.
   See accompanying NOTICE file for details.*/
package mil.tatrc.physiology.utilities;

import java.io.*;

import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;


import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
import org.apache.pdfbox.pdmodel.font.PDType1Font;
import org.apache.pdfbox.util.Matrix;

public class Excel2PDF
{
  public static void main(String[] args) throws Exception
  {
    Excel2PDF.convert("../docs/Validation/Scenarios/AnesthesiaMachineValidation.xlsx", "AnesthesiaMachineValidation.pdf");
  }
  
  // https://svn.apache.org/viewvc/pdfbox/trunk/examples/src/main/java/org/apache/pdfbox/examples/pdmodel/
  // http://javamoody.blogspot.com/2014/04/creating-paginated-table-with-pdfbox.html
  
  public static void convert(String from, String to) throws IOException
  {
    FileInputStream xlFile = new FileInputStream(new File(from));
    // Read workbook into HSSFWorkbook
    XSSFWorkbook xlWBook = new XSSFWorkbook(xlFile); 
    //We will create output PDF document objects at this point
    PDDocument  pdf = new PDDocument ();
    
    //pdf.addTitle();
    for(int s=0; s<xlWBook.getNumberOfSheets(); s++)
    {
      XSSFSheet xlSheet = xlWBook.getSheetAt(s);
      Log.info("Processing Sheet : " + xlSheet.getSheetName());
      PDPage page = new PDPage(PDRectangle.A4);
      page.setRotation(90);
      pdf.addPage(page);
      PDRectangle pageSize = page.getMediaBox();
      PDPageContentStream contents = new PDPageContentStream(pdf, page);
      contents.transform(new Matrix(0, 1, -1, 0, pageSize.getWidth(), 0));// including a translation of pageWidth to use the lower left corner as 0,0 reference
      contents.setFont(PDType1Font.HELVETICA_BOLD, 16);
      contents.beginText();      
      contents.newLineAtOffset(50,pageSize.getWidth()-50);
      contents.showText(xlSheet.getSheetName());
      contents.endText();
      contents.close();
      
      
      int rows = xlSheet.getPhysicalNumberOfRows();     
      for (int r = 0; r < rows; r++) 
      {
        XSSFRow row = xlSheet.getRow(r);
        if (row == null ) 
          continue;
        int cells = row.getPhysicalNumberOfCells();        
        if(cells == 0)
          continue;// Add an empty Roe
                
      }        
    }

/*    
    //We will use the object below to dynamically add new data to the table
    PdfPCell table_cell;
    //Loop through rows.
    while(rowIterator.hasNext()) 
    {
      Row row = rowIterator.next(); 
      Iterator<Cell> cellIterator = row.cellIterator();
      while(cellIterator.hasNext()) 
      {
        Cell cell = cellIterator.next(); //Fetch CELL
        switch(cell.getCellType()) 
        { //Identify CELL type
          //you need to add more code here based on
          //your requirement / transformations
          case Cell.CELL_TYPE_STRING:
            //Push the data from Excel to PDF Cell
            table_cell=new PdfPCell(new Phrase(cell.getStringCellValue()));
            //feel free to move the code below to suit to your needs
            my_table.addCell(table_cell);
            break;
        }
        //next line
      }
    }
*/              
    pdf.save(new File(to));
    pdf.close();      
    xlWBook.close();
    xlFile.close(); //close xls
  }
  
  
  public class Column 
  {
    private String name;
    private float width;

    public Column(String name, float width) 
    {
        this.name = name;
        this.width = width;
    }
    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
    public float getWidth() { return width; }
    public void setWidth(float width) { this.width = width; }
  }
}
