#region Using Statements
using System;

#endregion // Using Statements

#region License

//
// This file is part of the ANX.Framework created by the "ANX.Framework developer group".
//
// This file is released under the Ms-PL license.
//
//
//
// Microsoft Public License (Ms-PL)
//
// This license governs use of the accompanying software. If you use the software, you accept this license. 
// If you do not accept the license, do not use the software.
//
// 1.Definitions
//   The terms "reproduce," "reproduction," "derivative works," and "distribution" have the same meaning 
//   here as under U.S. copyright law.
//   A "contribution" is the original software, or any additions or changes to the software.
//   A "contributor" is any person that distributes its contribution under this license.
//   "Licensed patents" are a contributor's patent claims that read directly on its contribution.
//
// 2.Grant of Rights
//   (A) Copyright Grant- Subject to the terms of this license, including the license conditions and limitations 
//       in section 3, each contributor grants you a non-exclusive, worldwide, royalty-free copyright license to 
//       reproduce its contribution, prepare derivative works of its contribution, and distribute its contribution
//       or any derivative works that you create.
//   (B) Patent Grant- Subject to the terms of this license, including the license conditions and limitations in 
//       section 3, each contributor grants you a non-exclusive, worldwide, royalty-free license under its licensed
//       patents to make, have made, use, sell, offer for sale, import, and/or otherwise dispose of its contribution 
//       in the software or derivative works of the contribution in the software.
//
// 3.Conditions and Limitations
//   (A) No Trademark License- This license does not grant you rights to use any contributors' name, logo, or trademarks.
//   (B) If you bring a patent claim against any contributor over patents that you claim are infringed by the software, your 
//       patent license from such contributor to the software ends automatically.
//   (C) If you distribute any portion of the software, you must retain all copyright, patent, trademark, and attribution 
//       notices that are present in the software.
//   (D) If you distribute any portion of the software in source code form, you may do so only under this license by including
//       a complete copy of this license with your distribution. If you distribute any portion of the software in compiled or 
//       object code form, you may only do so under a license that complies with this license.
//   (E) The software is licensed "as-is." You bear the risk of using it. The contributors give no express warranties, guarantees,
//       or conditions. You may have additional consumer rights under your local laws which this license cannot change. To the
//       extent permitted under your local laws, the contributors exclude the implied warranties of merchantability, fitness for a 
//       particular purpose and non-infringement.

#endregion // License

namespace ANX.Framework.Graphics
{
    public sealed class DirectionalLight
    {
        private Vector3 diffuseColor;
        private Vector3 direction;
        private bool enabled;
        private Vector3 specularColor;
        private EffectParameter directionParameter;
        private EffectParameter diffuseColorParameter;
        private EffectParameter specularColorParameter;

        public DirectionalLight(EffectParameter directionParameter, EffectParameter diffuseColorParameter, EffectParameter specularColorParameter, DirectionalLight cloneSource)
        {
            this.directionParameter = directionParameter;
            this.diffuseColorParameter = diffuseColorParameter;
            this.specularColorParameter = specularColorParameter;

            if (cloneSource != null)
            {
                this.diffuseColor = cloneSource.diffuseColor;
                this.direction = cloneSource.direction;
                this.enabled = cloneSource.enabled;
                this.specularColor = cloneSource.specularColor;
            }
            else
            {
                this.diffuseColor = Vector3.One;
                this.direction = Vector3.Down;
                this.specularColor = Vector3.Zero;
            }
        }

        public Vector3 DiffuseColor
        {
            get
            {
                return this.diffuseColor;
            }
            set
            {
                this.diffuseColor = value;
                if (this.enabled && this.diffuseColorParameter != null)
                {
                    this.diffuseColorParameter.SetValue(value);
                }
            }
        }

        public Vector3 Direction
        {
            get
            {
                return this.direction;
            }
            set
            {
                this.direction = value;
                if (this.enabled && this.directionParameter != null)
                {
                    this.directionParameter.SetValue(value);
                }
            }
        }

        public bool Enabled
        {
            get
            {
                return this.enabled;
            }
            set
            {
                this.enabled = value;
            }
        }

        public Vector3 SpecularColor
        {
            get
            {
                return this.diffuseColor;
            }
            set
            {
                this.specularColor = value;
                if (this.enabled && this.specularColorParameter != null)
                {
                    this.specularColorParameter.SetValue(value);
                }
            }
        }
    }
}