using System;
using iTextSharp.text;
using iTextSharp.text.html;
using iTextSharp.text.pdf;
using Spring.Objects;
using Sleis.Utility;
using System.Collections.Generic;

namespace Sleis.Pdf
{
    public class ColumnObjectElementWriter : ElementWriter
    {

        public List<ObjectElementWriter> Elements { get; set; }

        public int Columns { get; set; }

        public override void Init()
        {
            ArgumentValidationUtility.ThrowOnEmpty(Elements, "Elements");
            if (Columns < 1)
            {
                Columns = 2;
            }
        }


        public override void Write(Document pdf, ObjectWrapper context)
        {
            LOG.Debug("Init Write");
            BeforeWrite(pdf, context);


            MultiColumnText columns = new MultiColumnText();

            columns.AddRegularColumns(36f, pdf.PageSize.Width - 36f, 24f, Columns);

            foreach (ObjectElementWriter ew in Elements)
            {
                object selectionValue = null;
                try
                {
                    selectionValue = context.GetPropertyValue(ew.Select);
                }
                catch(Exception err) { LOG.Debug(String.Format("Error getting accessing {0} : {1}", Select,  err.Message)); }//swallowed

                if (selectionValue != null || !ew.SkipNulls)
                {

                    Paragraph colParagraph = new Paragraph(String.Format(ew.Format, selectionValue), Font);

                    if (ew.SpaceBefore.HasValue)
                    {
                        colParagraph.SpacingBefore = ew.SpaceBefore.Value;
                    }

                    if (ew.SpaceAfter.HasValue)
                    {
                        colParagraph.SpacingAfter = ew.SpaceAfter.Value;
                    }

                    colParagraph.Add(new Paragraph(ew.Label, LabelFont));
                    colParagraph.Add(new Paragraph(String.Format(ew.Format, selectionValue), Font));

                    columns.AddElement(colParagraph);

                }
            }

            pdf.Add(columns);


        }
    }
}