/*
 * Copyright 2008 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using System;
using System.Text;

namespace ZXing.QrCode.Internal
{
   /// <summary>
   /// JAVAPORT: The original code was a 2D array of ints, but since it only ever gets assigned
   /// 0, 1 and 2 I'm going to use less memory and go with bytes.
   /// </summary>
   /// <author>dswitkin@google.com (Daniel Switkin)</author>
   public sealed class ByteMatrix
   {
      private readonly byte[][] bytes;
      private readonly int width;
      private readonly int height;

      /// <summary>
      /// Initializes a new instance of the <see cref="ByteMatrix"/> class.
      /// </summary>
      /// <param name="width">The width.</param>
      /// <param name="height">The height.</param>
      public ByteMatrix(int width, int height)
      {
         bytes = new byte[height][];
         for (var i = 0; i < height; i++)
            bytes[i] = new byte[width];
         this.width = width;
         this.height = height;
      }

      /// <summary>
      /// Returns the height.
      /// </summary>
      public int Height
      {
         get { return height; }
      }

      /// <summary>
      /// Returns the width.
      /// </summary>
      public int Width
      {
         get { return width; }
      }

      /// <summary>
      /// Returns or sets the <see cref="System.Int32"/> with the specified x.
      /// </summary>
      public int this[int x, int y]
      {
         get { return bytes[y][x]; }
         set { bytes[y][x] = (byte)value; }
      }

      /// <summary>
      /// an internal representation as bytes, in row-major order. array[y][x] represents point (x,y)
      /// </summary>
      public byte[][] Array
      {
         get { return bytes; }
      }

      /// <summary>
      /// Sets the specified x.
      /// </summary>
      /// <param name="x">The x.</param>
      /// <param name="y">The y.</param>
      /// <param name="value">The value.</param>
      public void set(int x, int y, byte value)
      {
         bytes[y][x] = value;
      }

      /// <summary>
      /// Sets the specified x.
      /// </summary>
      /// <param name="x">The x.</param>
      /// <param name="y">The y.</param>
      /// <param name="value">if set to <c>true</c> [value].</param>
      public void set(int x, int y, bool value)
      {
         bytes[y][x] = (byte)(value ? 1 : 0);
      }

      /// <summary>
      /// Clears the specified value.
      /// </summary>
      /// <param name="value">The value.</param>
      public void clear(byte value)
      {
         for (int y = 0; y < height; ++y)
         {
            for (int x = 0; x < width; ++x)
            {
               bytes[y][x] = value;
            }
         }
      }

      /// <summary>
      /// Returns a <see cref="System.String"/> that represents this instance.
      /// </summary>
      /// <returns>
      /// A <see cref="System.String"/> that represents this instance.
      /// </returns>
      override public String ToString()
      {
         var result = new StringBuilder(2 * width * height + 2);
         for (int y = 0; y < height; ++y)
         {
            for (int x = 0; x < width; ++x)
            {
               switch (bytes[y][x])
               {
                  case 0:
                     result.Append(" 0");
                     break;
                  case 1:
                     result.Append(" 1");
                     break;
                  default:
                     result.Append("  ");
                     break;
               }
            }
            result.Append('\n');
         }
         return result.ToString();
      }
   }
}