//---------------------------------------------------------------------------------------------------------------------------------------------------
// <copyright file="SkySphere.cs" company="DarkWynter Studios">
//     Copyright (C)2007 DarkWynter Studios.  All rights reserved.
// </copyright>
//---------------------------------------------------------------------------------------------------------------------------------------------------
// {Contact : darkwynter.com for licensing information
//---------------------------------------------------------------------------------------------------------------------------------------------------

namespace DarkWynter.Engine.GameObjects
{
    #region Using Statements
    using System;
    using System.Collections.Generic;
    using Microsoft.Xna.Framework;
    using Microsoft.Xna.Framework.Audio;
    using Microsoft.Xna.Framework.Content;
    using Microsoft.Xna.Framework.Graphics;
    using Microsoft.Xna.Framework.Input;
    using Microsoft.Xna.Framework.Storage;
    using System.Xml;
    #endregion

    using DarkWynter.Engine.Globals;
    using DarkWynter.Engine.ObjectLib;
    using DarkWynter.Engine.GameObjects;
    using DarkWynter.Engine.Init;
    using DarkWynter.Stream;

    /// <summary>
    /// Large sphere surrounding the game world.
    /// Like a sky-box, except spherical to simulate true atmospheric visibility.
    /// </summary>
    public class SkySphere : GameObject
    {
        private string skyTexture;
        private string skyTextureBump;
        private float rotationScale = 10.0f;

        private float[] materialDiffuse = { 0.7f, 0.7f, 0.7f, 1.0f };

        // Specular factor
        private float[] materialSpecular = { 0.0f, 0.0f, 0.0f, 1.0f };

        /// <summary>
        /// Skysphere contrustor.
        /// </summary>
        public SkySphere(Load gameObjectLoader)
            : base(gameObjectLoader)
        {
            mass.gameObjectPointer = this;
            mass.objectType = Enums_Engine.ObjectType.SKYSPHERE;

            draw = new Draw(Enums_Stream.DrawMethod.BasicGameObject_Draw, "BasicLightingShaderMain");
        }

        /// <summary>
        /// Override loading configurations for skysphere.
        /// </summary>
        /// <param name="node">Contains skyphere data</param>
        /// <param name="objectLibrary">The object library</param>
        /// <returns>True if load was successful</returns>
        public override bool Load(ObjectLibrary objectLibrary)
        {
            //if (!base.load())
            //    return false;
            this.name = load.node.Attributes["name"].Value;

            try
            {
                skyTexture = load.node.Attributes["texture"].Value;
                skyTextureBump = load.node.Attributes["bumpTexture"].Value;
            }
            catch { System.Diagnostics.Debug.WriteLine("Error reading sky texture filename"); return false; }

            draw.textureList.Clear();
            draw.textureList.Add(Statics_Engine.SystemSettings.content.Load<Texture2D>(skyTexture));
            draw.textureList.Add(Statics_Engine.SystemSettings.content.Load<Texture2D>(skyTextureBump));

            draw.model = Statics_Engine.SystemSettings.content.Load<Model>("Content/_models/skySphere");

            // Apply our own advanced Effect to the Model
            foreach (ModelMesh mesh in draw.model.Meshes)
            {
                for (int i = 0; i < mesh.MeshParts.Count; i++)
                {
                    // Add effect to mesh
                    mesh.MeshParts[i].Effect = ShaderParameters.DrawFX.effect;
                }
            }

            mass.SetPosition(new Vector3(Statics_Engine.TerrainSettings.collisionMapSize / 2, 500, Statics_Engine.TerrainSettings.collisionMapSize / 2), 
                             new Vector3(Statics_Engine.TerrainSettings.collisionMapSize / 2, 500, Statics_Engine.TerrainSettings.collisionMapSize / 2 + 1));

        mass.scale = new Vector3(1200);
           // mass.scale = new Vector3(2500);
            return true;
        }

        /// <summary>
        /// Update rotation on the skysphere.
        /// </summary>
        /// <param name="objectLibrary">The object library</param>
        public override void Update(ref ObjectLibrary objectLibrary)
        {
            Random rand = new Random();

            //// Increment Rotation With dt
            mass.Rotate(0.00f, 0.01f);
            mass.SetPosition( Statics_Engine.PlayerSettings.playerPosition, Statics_Engine.PlayerSettings.playerPosition +  Vector3.Forward);

            mass.scale = new Vector3(2000);
        }

        /// <summary>
        /// Override draw for skysphere.
        /// </summary>
        public override Draw Draw()
        {
            draw.matrix = Matrix.CreateScale(mass.scale) *
                     Matrix.CreateFromQuaternion(mass.currentRotation) *
                     Matrix.CreateTranslation(mass.currentPosition);

            return draw;
        }
    }
}