/*
 * TextureManager.cs
 * Authors:     August Zinsser
 * 
 * Copyright Matthew Belmonte 2007
 */


using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using System.IO;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Content;
using Nuclex.Fonts;


namespace tAC_Engine
{

    //public static enum TextureID { };

    /// <summary>
    /// Loads texture content from the content pipeline. Also stores a global resolution setting and automatically
    /// prunes large mipmaps from a file according to this setting, allowing client classes to load a texture
    /// without worrying about the game's current resolution settings. 
    /// On files without mipmaps, using this class will return the same data as XNA's ContentManager.
    /// </summary>
    public static class TextureManager
    {
        public enum LevelOfDetail {High, Medium, Low};

        private static int mLevelOfDetail = (int)LevelOfDetail.High;

        /// <summary>
        /// Maximum mipmap for textures loaded with the TextureManager class
        /// </summary>
        public static LevelOfDetail LOD
        {
            set { mLevelOfDetail = (int)value; }
            get { return (LevelOfDetail)mLevelOfDetail; }
        }

        // Stores all the textures to be referenced within the game. Currently uses strings for key lookups but 
        // should later be switched to an enum for efficency.
        private static Dictionary<string, Texture2D> mTextureDatabase = new Dictionary<string, Texture2D>();

        /// <summary>
        /// Loads in the texture2D if it hasn't been done so already and return the reference to it to be used for drawing.
        /// Differences in resolution/quality of images should be handled via mipmaps rather than different images.
        /// </summary>
        public static Texture2D Load(string assetPath)
        {
            if (!mTextureDatabase.ContainsKey(assetPath))
            {
                mTextureDatabase.Add(assetPath, GenericBaseApplication.GameManager.ContentManager.Load<Texture2D>(
                    Directory.GetCurrentDirectory() + "\\" + assetPath));
            }
            return mTextureDatabase[assetPath];
        }
    }
}