#region PDFsharp - A .NET library for processing PDF
//
// Authors:
//   Stefan Lange (mailto:Stefan.Lange@pdfsharp.com)
//
// Copyright (c) 2005-2008 empira Software GmbH, Cologne (Germany)
//
// http://www.pdfsharp.com
// http://sourceforge.net/projects/pdfsharp
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
// DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.Collections;
using System.Globalization;
using System.Text;
using System.IO;
using PdfSharp.Internal;
using PdfSharp;

namespace PdfSharp.Pdf
{
  /// <summary>
  /// Represents the PDF document information dictionary.
  /// </summary>
  public sealed class PdfDocumentInformation : PdfDictionary
  {
    /// <summary>
    /// Initializes a new instance of the <see cref="PdfDocumentInformation"/> class.
    /// </summary>
    public PdfDocumentInformation(PdfDocument document)
      : base(document)
    {
    }

    PdfDocumentInformation(PdfDictionary dict)
      : base(dict)
    {
    }


    /// <summary>
    /// Gets or sets the document's title.
    /// </summary>
    public string Title
    {
      get { return Elements.GetString(Keys.Title); }
      set { Elements.SetString(Keys.Title, value); }
    }

    /// <summary>
    /// Gets or sets the name of the person who created the document.
    /// </summary>
    public string Author
    {
      get { return Elements.GetString(Keys.Author); }
      set { Elements.SetString(Keys.Author, value); }
    }

    /// <summary>
    /// Gets or sets the name of the subject of the document.
    /// </summary>
    public string Subject
    {
      get { return Elements.GetString(Keys.Subject); }
      set { Elements.SetString(Keys.Subject, value); }
    }

    /// <summary>
    /// Gets or sets keywords associated with the document.
    /// </summary>
    public string Keywords
    {
      get { return Elements.GetString(Keys.Keywords); }
      set { Elements.SetString(Keys.Keywords, value); }
    }

    /// <summary>
    /// Gets or sets the name of the application (for example, MigraDoc) that created the document.
    /// </summary>
    public string Creator
    {
      get { return Elements.GetString(Keys.Creator); }
      set { Elements.SetString(Keys.Creator, value); }
    }

    /// <summary>
    /// Gets the producer application (for example, PDFsharp).
    /// </summary>
    public string Producer
    {
      get { return Elements.GetString(Keys.Producer); }
    }

    /// <summary>
    /// Gets or sets the creation date of the document.
    /// </summary>
    public DateTime CreationDate
    {
      get { return Elements.GetDateTime(Keys.CreationDate, DateTime.Now); }
      set { Elements.SetDateTime(Keys.CreationDate, value); }
    }

    /// <summary>
    /// Gets or sets the modification date of the document.
    /// </summary>
    public DateTime ModificationDate
    {
      get { return Elements.GetDateTime(Keys.ModDate, DateTime.Now); }
      set { Elements.SetDateTime(Keys.ModDate, value); }
    }

    // TODO CustomProperties and meta data

    /// <summary>
    /// Predefined keys of this dictionary.
    /// </summary>
    internal sealed class Keys : KeysBase
    {
      /// <summary>
      /// (Optional; PDF 1.1) The document’s title.
      /// </summary>
      [KeyInfo(KeyType.String | KeyType.Optional)]
      public const string Title = "/Title";

      /// <summary>
      /// (Optional) The name of the person who created the document.
      /// </summary>
      [KeyInfo(KeyType.String | KeyType.Optional)]
      public const string Author = "/Author";

      /// <summary>
      /// (Optional; PDF 1.1) The subject of the document.
      /// </summary>
      [KeyInfo(KeyType.String | KeyType.Optional)]
      public const string Subject = "/Subject";

      /// <summary>
      /// (Optional; PDF 1.1) Keywords associated with the document.
      /// </summary>
      [KeyInfo(KeyType.String | KeyType.Optional)]
      public const string Keywords = "/Keywords";

      /// <summary>
      /// (Optional) If the document was converted to PDF from another format,
      /// the name of the application (for example, empira MigraDoc®) that created the
      /// original document from which it was converted.
      /// </summary>
      [KeyInfo(KeyType.String | KeyType.Optional)]
      public const string Creator = "/Creator";

      /// <summary>
      /// (Optional) If the document was converted to PDF from another format,
      /// the name of the application (for example, this library) that converted it to PDF.
      /// </summary>
      [KeyInfo(KeyType.String | KeyType.Optional)]
      public const string Producer = "/Producer";

      /// <summary>
      /// (Optional) The date and time the document was created, in human-readable form.
      /// </summary>
      [KeyInfo(KeyType.Date | KeyType.Optional)]
      public const string CreationDate = "/CreationDate";

      /// <summary>
      /// (Required if PieceInfo is present in the document catalog; otherwise optional; PDF 1.1)
      /// The date and time the document was most recently modified, in human-readable form.
      /// </summary>
      [KeyInfo(KeyType.String | KeyType.Optional)]
      public const string ModDate = "/ModDate";

      /// <summary>
      /// (Optional; PDF 1.3) A name object indicating whether the document has been modified 
      /// to include trapping information.
      /// </summary>
      [KeyInfo("1.3", KeyType.Name | KeyType.Optional)]
      public const string Trapped = "/Trapped";

      /// <summary>
      /// Gets the KeysMeta for these keys.
      /// </summary>
      public static DictionaryMeta Meta
      {
        get
        {
          if (Keys.meta == null)
            Keys.meta = CreateMeta(typeof(Keys));
          return Keys.meta;
        }
      }
      static DictionaryMeta meta;
    }

    /// <summary>
    /// Gets the KeysMeta of this dictionary type.
    /// </summary>
    internal override DictionaryMeta Meta
    {
      get { return Keys.Meta; }
    }
  }
}
