#region Using Statements
using System;

#endregion // Using Statements

// This file is part of the ANX.Framework created by the
// "ANX.Framework developer group" and released under the Ms-PL license.
// For details see: http://anxframework.codeplex.com/license

namespace ANX.Framework.Graphics
{
    public struct VertexElement
    {
        #region Private Members
        private int offset;
        private VertexElementFormat elementFormat;
        private VertexElementUsage elementUsage;
        private int usageIndex;
        
        #endregion // Private Members

        public VertexElement(int offset, VertexElementFormat elementFormat, VertexElementUsage elementUsage, int usageIndex)
        {
            this.offset = offset;
            this.elementFormat = elementFormat;
            this.elementUsage = elementUsage;
            this.usageIndex = usageIndex;
        }

        public int Offset
        {
            get
            {
                return this.offset;
            }
            set
            {
                this.offset = value;
            }
        }

        public VertexElementFormat VertexElementFormat
        {
            get
            {
                return this.elementFormat;
            }
            set
            {
                this.elementFormat = value;
            }
        }

        public VertexElementUsage VertexElementUsage
        {
            get
            {
                return this.elementUsage;
            }
            set
            {
                this.elementUsage = value;
            }
        }

        public int UsageIndex
        {
            get
            {
                return this.usageIndex;
            }
            set
            {
                this.usageIndex = value;
            }
        }

        public override int GetHashCode()
        {
            throw new NotImplementedException();
        }

        public override string ToString()
        {
            return string.Format("{{Offset:{0} Format:{1} Usage:{2} UsageIndex:{3}}}", this.offset, this.elementFormat, this.elementUsage, this.usageIndex);
        }

        public override bool Equals(object obj)
        {
            if (obj != null && obj.GetType() == this.GetType())
            {
                return this == (VertexElement)obj;
            }

            return false;
        }

        public static bool operator ==(VertexElement lhs, VertexElement rhs)
        {
            return lhs.offset == rhs.offset && lhs.elementFormat == rhs.elementFormat && lhs.elementUsage == rhs.elementUsage && lhs.usageIndex == rhs.usageIndex;
        }

        public static bool operator !=(VertexElement lhs, VertexElement rhs)
        {
            return lhs.offset != rhs.offset || lhs.elementFormat != rhs.elementFormat || lhs.elementUsage != rhs.elementUsage || lhs.usageIndex == rhs.usageIndex;
        }
    }
}