using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using iTextSharp.text.xml.xmp;
using System.Drawing;
using Spring.Objects;
using Spring.Core.IO;

namespace Sleis.Pdf
{
    public class SignatureDisplay
    {
        public IResource Background { get; set; }
        public Point Location { get; set; }
        public Size Size { get; set; }

        public void Init()
        {
            if (Background == null || !Background.File.Exists)
            {
                throw new FileNotFoundException(Background.File.FullName);
            }

            if (Size == null)
            {
                throw new ArgumentNullException("Size");
            }

            if (Location == null)
            {
                Location = new Point(0, 0);
            }

        }
    }



    public class PdfSignatureArgs
    {
        public string Author { get; set; }
        public string Title { get; set; }
        public string Subject { get; set; }
        public string Keywords { get; set; }
        public string Producer { get; set; }
        public string Creator { get; set; }
        public string Reason { get; set; }
        public string Contact { get; set; }
        public string Locality { get; set; }
        public SignatureDisplay Display { get; set; }
        public Dictionary<string, string> Other { get; set; }

        public void Init()
        {
            if (Display == null)
            {
                throw new ArgumentNullException("Display");
            }

            Display.Init();

            if (String.IsNullOrEmpty(Author))
            {
                throw new ArgumentNullException("Author");
            }
            if (String.IsNullOrEmpty(Title))
            {
                throw new ArgumentNullException("Title");
            }
            if (String.IsNullOrEmpty(Subject))
            {
                throw new ArgumentNullException("Subject");
            }

            if (String.IsNullOrEmpty(Keywords))
            {
                Keywords = String.Empty;
            }
            if (String.IsNullOrEmpty(Producer))
            {
                throw new ArgumentNullException("Producer");
            }
            if (String.IsNullOrEmpty(Creator))
            {
                throw new ArgumentNullException("Creator");
            }

            if (String.IsNullOrEmpty(Reason))
            {
                throw new ArgumentNullException("Reason");
            }
            if (String.IsNullOrEmpty(Contact))
            {
                throw new ArgumentNullException("Contact");
            }
            if (String.IsNullOrEmpty(Locality))
            {
                throw new ArgumentNullException("Locality");
            }
        }

        public Dictionary<string, string> GetAllArgs()
        {
            Dictionary<string, string> allArgs = new Dictionary<string, string>(Other);
            allArgs.Add("Author", Author);
            allArgs.Add("Title", Title);
            allArgs.Add("Subject", Subject);
            allArgs.Add("Keywords", Keywords);
            allArgs.Add("Producer", Producer);
            allArgs.Add("Creator", Creator);

            return allArgs;
        }

        public byte[] GetStreamedArgs()
        {
            MemoryStream os = new System.IO.MemoryStream();
            XmpWriter xmp = new XmpWriter(os, GetAllArgs());
            xmp.Close();
            return os.ToArray();
        }

    }

}