#region PDFsharp - A .NET library for processing PDF
//
// Authors:
//   Klaus Potzesny (mailto:Klaus.Potzesny@pdfsharp.com)
//
// Copyright (c) 2005-2007 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.Diagnostics;

namespace PdfSharp.Drawing.BarCodes
{
  /// <summary>
  /// 
  /// </summary>
  public class Code3of9Standard : ThickThinBarCode
  {
    /// <summary>
    /// Initializes a new instance of Standard3of9.
    /// </summary>
    public Code3of9Standard()
      : base("", XSize.Empty, CodeDirection.LeftToRight)
    {
    }

    /// <summary>
    /// Initializes a new instance of Standard3of9.
    /// </summary>
    public Code3of9Standard(string code)
      : base(code, XSize.Empty, CodeDirection.LeftToRight)
    {
    }

    /// <summary>
    /// Initializes a new instance of Standard3of9.
    /// </summary>
    public Code3of9Standard(string code, XSize size)
      : base(code, size, CodeDirection.LeftToRight)
    {
    }

    /// <summary>
    /// Initializes a new instance of Standard3of9.
    /// </summary>
    public Code3of9Standard(string code, XSize size, CodeDirection direction)
      : base(code, size, direction)
    {
    }

    /// <summary>
    /// Returns an array of size 9 that represents the thick (true) and thin (false) lines and spaces
    /// representing the specified digit.
    /// </summary>
    /// <param name="ch">The character to represent.</param>
    private static bool[] ThickThinLines(char ch)
    {
      return Lines["0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%*".IndexOf(ch)];
    }
    static bool[][] Lines = new bool[][]
    {
      // '0'
      new bool[] {false, false, false, true, true, false, true, false, false},
      // '1'
      new bool[] {true, false, false, true, false, false, false, false, true},
      // '2'
      new bool[] {false, false, true, true, false, false, false, false, true},
      // '3'
      new bool[] {true, false, true, true, false, false, false, false, false},
      // '4'
      new bool[] {false, false, false, true, true, false, false, false, true},
      // '5'
      new bool[] {true, false, false, true, true, false, false, false, false},
      // '6'
      new bool[] {false, false, true, true, true, false, false, false, false},
      // '7'
      new bool[] {false, false, false, true, false, false, true, false, true},
      // '8'
      new bool[] {true, false, false, true, false, false, true, false, false},
      // '9'
      new bool[] {false, false, true, true, false, false, true, false, false},
      // 'A'
      new bool[] {true, false, false, false, false, true, false, false, true},
      // 'B'
      new bool[] {false, false, true, false, false, true, false, false, true},
      // 'C'
      new bool[] {true, false, true, false, false, true, false, false, false},
      // 'D'
      new bool[] {false, false, false, false, true, true, false, false, true},
      // 'E'
      new bool[] {true, false, false, false, true, true, false, false, false},
      // 'F'
      new bool[] {false, false, true, false, true, true, false, false, false},
      // 'G'
      new bool[] {false, false, false, false, false, true, true, false, true},
      // 'H'
      new bool[] {true, false, false, false, false, true, true, false, false},
      // 'I'
      new bool[] {false, false, true, false, false, true, true, false, false},
      // 'J'
      new bool[] {false, false, false, false, true, true, true, false, false},
      // 'K'
      new bool[] {true, false, false, false, false, false, false, true, true},
      // 'L'
      new bool[] {false, false, true, false, false, false, false, true, true},
      // 'M'
      new bool[] {true, false, true, false, false, false, false, true, false},
      // 'N'
      new bool[] {false, false, false, false, true, false, false, true, true},
      // 'O'
      new bool[] {true, false, false, false, true, false, false, true, false},
      // 'P':
      new bool[] {false, false, true, false, true, false, false, true, false},
      // 'Q'
      new bool[] {false, false, false, false, false, false, true, true, true},
      // 'R'
      new bool[] {true, false, false, false, false, false, true, true, false},
      // 'S'
      new bool[] {false, false, true, false, false, false, true, true, false},
      // 'T'
      new bool[] {false, false, false, false, true, false, true, true, false},
      // 'U'
      new bool[] {true, true, false, false, false, false, false, false, true},
      // 'V'
      new bool[] {false, true, true, false, false, false, false, false, true},
      // 'W'
      new bool[] {true, true, true, false, false, false, false, false, false},
      // 'X'
      new bool[] {false, true, false, false, true, false, false, false, true},
      // 'Y'
      new bool[] {true, true, false, false, true, false, false, false, false},
      // 'Z'
      new bool[] {false, true, true, false, true, false, false, false, false},
      // '-'
      new bool[] {false, true, false, false, false, false, true, false, true},
      // '.'
      new bool[] {true, true, false, false, false, false, true, false, false},
      // ' '
      new bool[] {false, true, true, false, false, false, true, false, false},
      // '$'
      new bool[] {false, true, false, true, false, true, false, false, false},
      // '/'
      new bool[] {false, true, false, true, false, false, false, true, false},
      // '+'
      new bool[] {false, true, false, false, false, true, false, true, false},
      // '%'
      new bool[] {false, false, false, true, false, true, false, true, false},
      // '*'
      new bool[] {false, true, false, false, true, false, true, false, false},
   };


    /// <summary>
    /// Calculates the thick and thin line widths,
    /// taking into acount the required rendering size.
    /// </summary>
    internal override void CalcThinBarWidth(BarCodeRenderInfo info)
    {
      /*
       * The total width is the sum of the following parts:
       * Starting lines      = 3 * thick + 7 * thin
       *  +
       * Code Representation = (3 * thick + 7 * thin) * code.Length
       *  +
       * Stopping lines      =  3 * thick + 6 * thin
       * 
       * with r = relation ( = thick / thin), this results in
       * 
       * Total width = (13 + 6 * r + (3 * r + 7) * code.Length) * thin
       */
      double thinLineAmount = 13 + 6 * this.wideNarrowRatio + (3 * this.wideNarrowRatio + 7) * this.text.Length;
      info.ThinBarWidth = this.Size.Width / thinLineAmount;
    }

    /// <summary>
    /// Checks the code to be convertible into an standard 3 of 9 bar code.
    /// </summary>
    /// <param name="text">The code to be checked.</param>
    protected override void CheckCode(string text)
    {
      if (text == null)
        throw new ArgumentNullException("text");

      if (text.Length == 0)
        throw new ArgumentException(BcgSR.Invalid3Of9Code(text));

      foreach (char ch in text)
      {
        if ("0123456789ABCDEFGHIJKLMNOP'QRSTUVWXYZ-. $/+%*".IndexOf(ch) < 0)
          throw new ArgumentException(BcgSR.Invalid3Of9Code(text));
      }
    }

    /// <summary>
    /// Renders the bar code.
    /// </summary>
    protected internal override void Render(XGraphics gfx, XBrush brush, XFont font, XPoint position)
    {
      XGraphicsState state = gfx.Save();

      BarCodeRenderInfo info = new BarCodeRenderInfo(gfx, brush, font, position);
      InitRendering(info);
      info.CurrPosInString = 0;
      //info.CurrPos = info.Center - this.size / 2;
      info.CurrPos = position - CodeBase.CalcDistance(AnchorType.TopLeft, this.anchor, this.size);

      RenderStart(info);
      while (info.CurrPosInString < this.text.Length)
      {
        RenderNextChar(info);
        RenderGap(info, false);
      }
      RenderStop(info);
      if (this.TextLocation != TextLocation.None)
        RenderText(info);

      gfx.Restore(state);
    }

    private void RenderNextChar(BarCodeRenderInfo info)
    {
      RenderChar(info, this.text[info.CurrPosInString]);
      ++info.CurrPosInString;
    }

    private void RenderChar(BarCodeRenderInfo info, char ch)
    {
      bool[] thickThinLines = ThickThinLines(ch);
      int idx = 0;
      while (idx < 9)
      {
        RenderBar(info, thickThinLines[idx]);
        if (idx < 8)
          RenderGap(info, thickThinLines[idx + 1]);
        idx += 2;
      }
    }

    private void RenderStart(BarCodeRenderInfo info)
    {
      RenderChar(info, '*');
      RenderGap(info, false);
    }

    private void RenderStop(BarCodeRenderInfo info)
    {
      RenderChar(info, '*');
    }
  }
}
