using System;
using System.Runtime.InteropServices;

namespace StgSharp.Math
{
    public class Matrix4x2
    {
        internal M128Map _map;

        internal IntPtr _colum0Ptr;
        internal IntPtr _colum1Ptr;

        private bool _isTransposed;
        private Matrix2x4 _transpose;

        public Matrix4x2(
            float a00, float a01,
            float a10, float a11,
            float a20, float a21,
            float a30, float a31
            )
        {
            _colum0Ptr = internalIO.load_internal(a00,a10,a20,a30);
            _colum0Ptr = internalIO.load_internal(a01,a11,a21,a31);

            _transpose = new Matrix2x4(this);
        }

        public Matrix4x2(
            IntPtr colum0Ptr,
            IntPtr colum1Ptr
            )
        {
            _colum0Ptr = colum0Ptr;
            _colum1Ptr = colum1Ptr;

            _transpose = new Matrix2x4(this);
        }

        public Matrix4x2(Matrix2x4 transpose)
        {
            _transpose = transpose;
        }

        public unsafe Matrix2x4 Transpose(TransposeMode transposeMode )
        {
            if (!_isTransposed)
            {
                (*(M128*)_transpose._colum0Ptr).single_0 = (*(M128*)_colum0Ptr).single_0;
                (*(M128*)_transpose._colum1Ptr).single_0 = (*(M128*)_colum0Ptr).single_1;
                (*(M128*)_transpose._colum2Ptr).single_0 = (*(M128*)_colum0Ptr).single_2;
                (*(M128*)_transpose._colum3Ptr).single_0 = (*(M128*)_colum0Ptr).single_3;

                (*(M128*)_transpose._colum0Ptr).single_1 = (*(M128*)_colum1Ptr).single_0;
                (*(M128*)_transpose._colum1Ptr).single_1 = (*(M128*)_colum1Ptr).single_1;
                (*(M128*)_transpose._colum2Ptr).single_1 = (*(M128*)_colum1Ptr).single_2;
                (*(M128*)_transpose._colum3Ptr).single_1 = (*(M128*)_colum1Ptr).single_3;

                _isTransposed = true;

            }

            switch (transposeMode)
            {
                case TransposeMode.New:
                    return new Matrix2x4(
                        internalIO.load_cpy_internal(_transpose._colum0Ptr),
                        internalIO.load_cpy_internal(_transpose._colum1Ptr),
                        internalIO.load_cpy_internal(_transpose._colum2Ptr),
                        internalIO.load_cpy_internal(_transpose._colum3Ptr)
                        );
                    break;
                case TransposeMode.Copy:
                    return _transpose;
                    break;
                default:
                    throw new Exception();
                    break;
            }

        }

        public static Matrix4x2 operator +(Matrix4x2 matrix1, Matrix4x2 matrix2)
        {
            return new Matrix4x2(
                internalIO.addps_internal(matrix1._colum0Ptr,matrix2._colum0Ptr),
                internalIO.addps_internal(matrix1._colum1Ptr,matrix2._colum1Ptr)
                );
        }

        public static Matrix4x2 operator -(Matrix4x2 matrix1, Matrix4x2 matrix2)
        {
            return new Matrix4x2(
                internalIO.subps_internal(matrix1._colum0Ptr, matrix2._colum0Ptr),
                internalIO.subps_internal(matrix1._colum1Ptr, matrix2._colum1Ptr)
                );
        }

        public static Matrix4x2 operator *(Matrix4x2 matrix,float value)
        {
            return new Matrix4x2(
                internalIO.mulps_const_internal(matrix._colum0Ptr,value),
                internalIO.mulps_const_internal(matrix._colum1Ptr,value)
                );
        }

        public static Matrix4x2 operator /(Matrix4x2 matrix, float value)
        {
            return new Matrix4x2(
                internalIO.divps_const_internal(matrix._colum0Ptr,value),
                internalIO.divps_const_internal(matrix._colum1Ptr,value)
                );
        }

        ~Matrix4x2()
        {
            if (_map == null)
            {
                internalIO.deinitM128_internal(_colum0Ptr);
                internalIO.deinitM128_internal(_colum1Ptr);
            }
        }


    }


}