/***************************************************************************
 *                                TileList.cs
 *                            -------------------
 *   begin                : May 1, 2002
 *   copyright            : (C) The RunUO Software Team
 *   email                : info@runuo.com
 *
 *   $Id$
 *
 ***************************************************************************/

/***************************************************************************
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 ***************************************************************************/

namespace Server
{
  public class TileList
  {
    private static readonly StaticTile[] m_EmptyTiles = System.Array.Empty<StaticTile>();
    private StaticTile[] m_Tiles;

    public TileList()
    {
      m_Tiles = new StaticTile[8];
      Count = 0;
    }

    public int Count { get; private set; }

    public void AddRange(StaticTile[] tiles)
    {
      if (Count + tiles.Length > m_Tiles.Length)
      {
        var old = m_Tiles;
        m_Tiles = new StaticTile[(Count + tiles.Length) * 2];

        for (var i = 0; i < old.Length; ++i)
          m_Tiles[i] = old[i];
      }

      for (var i = 0; i < tiles.Length; ++i)
        m_Tiles[Count++] = tiles[i];
    }

    public void Add(ushort id, sbyte z)
    {
      if (Count + 1 > m_Tiles.Length)
      {
        var old = m_Tiles;
        m_Tiles = new StaticTile[old.Length * 2];

        for (var i = 0; i < old.Length; ++i)
          m_Tiles[i] = old[i];
      }

      m_Tiles[Count].m_ID = id;
      m_Tiles[Count].m_Z = z;
      ++Count;
    }

    public StaticTile[] ToArray()
    {
      if (Count == 0)
        return m_EmptyTiles;

      var tiles = new StaticTile[Count];

      for (var i = 0; i < Count; ++i)
        tiles[i] = m_Tiles[i];

      Count = 0;

      return tiles;
    }
  }
}