/*
 * GroupTextureManager.cs
 * Authors: Karl Orosz
 * Copyright (c) 2007-2008 Cornell University

 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.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;

namespace StarJack
{
    class GroupTextureManager
    {
        private static String mRootDirectory;
        public static String RootDirectory{
            get{return mRootDirectory;}
            set{mRootDirectory = value;}
        }

        private static Dictionary<String, Dictionary<String, TextureInfo>> mGroupList;


        static GroupTextureManager (){
            mGroupList = new Dictionary<string, Dictionary<string, TextureInfo>>();
            mRootDirectory = Entity.RootDirectory;
        }

        public static Dictionary<string, TextureInfo> GetGroupTexture(string name)
        {
            if (mGroupList.ContainsKey(name))
            {
                return mGroupList[name];
            }
            else
            {
                if (LoadGroup(name))
                {
                    return mGroupList[name];
                }
                else
                {
                    return null;
                }
            }
        }

        private static bool LoadGroup(string name)
        {
            if (name == null || name.Equals(""))
            {
                return false;
            }
            else
            {
                if (Directory.Exists(mRootDirectory + @"\Content\Texture\" + name))
                {
                    Dictionary<string, TextureInfo> mGroupTextures = new Dictionary<string, TextureInfo>();
                    string[] assets = Directory.GetFiles(mRootDirectory + @"\Content\Texture\" + name);
                    foreach (string s in assets)
                    {
                        if (s.Contains(".xnb"))
                        {
                            int last = s.LastIndexOf(@"\");
                            string assetName = s.Substring(last + 1, s.Length - 4 - last - 1);
                            mGroupTextures.Add(assetName, new TextureInfo(assetName, name));
                        }
                    }
                    mGroupList.Add(name, mGroupTextures);
                }
                else
                {
#if DEBUG
                    throw new Exception("Missing Group Folder" + mRootDirectory + @"\Content\Texture\" + name);
#else
                    return false;
#endif
                }
            }
            return true;
        }
    }
}