using System;
using System.Runtime.InteropServices;

namespace StgSharp.Math
{
    public class Matrix3x2
    {
        internal M128Map _map;

        internal IntPtr _colum0Ptr;
        internal IntPtr _colum1Ptr;

        private bool _isTransposed;
        private Matrix2x3 _transpose;

        public Matrix3x2(
            float a00,float a01,
            float a10,float a11,
            float a20,float a21
            )
        {
            _colum0Ptr = internalIO.load_internal(a00,a10,a20,0);
            _colum0Ptr = internalIO.load_internal(a01,a11,a21,0);

            _transpose = new Matrix2x3(this);
        }

        internal Matrix3x2(
            IntPtr colum0Ptr,
            IntPtr colum1Ptr
            )
        {
            _colum0Ptr = colum0Ptr;
            _colum1Ptr = colum1Ptr;

            _transpose = new Matrix2x3(this);
        }

        internal Matrix3x2(Matrix2x3 transpose)
        {
            _transpose = transpose;
        }

        public unsafe Matrix2x3 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._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;

                _isTransposed = true;

            }
            switch (transposeMode)
            {
                case TransposeMode.New:
                    return new Matrix2x3(
                        _transpose._colum0Ptr,
                        _transpose._colum0Ptr,
                        _transpose._colum0Ptr
                        );
                    break;
                case TransposeMode.Copy:
                    return _transpose;
                    break;
                default:
                    throw new Exception();
                    break;
            }

        }

        ~Matrix3x2()
        {
            if (_map==null)
            {
                internalIO.deinitM128_internal(_colum0Ptr);
                internalIO.deinitM128_internal(_colum1Ptr);
            }
        }

    }
}