using System;
using System.Runtime.InteropServices;

namespace StgSharp.Math
{
    public class Matrix3x3
    {
        internal M128Map map;

        internal IntPtr _colum0Ptr;
        internal IntPtr _colum1Ptr;
        internal IntPtr _colum2Ptr;

        private bool _isDisposed;
        private Matrix3x3 _transpose;

        public Matrix3x3(
            float a00, float a01, float a02,
            float a10, float a11, float a12,
            float a20, float a21, float a22
            )
        {
            _colum0Ptr = internalIO.load_internal(a00,a10,a20,0);
            _colum1Ptr = internalIO.load_internal(a01,a11,a21,0);
            _colum2Ptr = internalIO.load_internal(a02,a12,a22,0);

            _transpose = new Matrix3x3(this);
        }

        internal Matrix3x3(Matrix3x3 transpose)
        {
            _transpose = transpose;
        }

        internal Matrix3x3(
            IntPtr colum0Ptr,
            IntPtr colum1Ptr,
            IntPtr colum2Ptr
            )
        {
            _colum0Ptr= colum0Ptr;
            _colum1Ptr= colum1Ptr;
            _colum2Ptr= colum2Ptr;

            _transpose = new Matrix3x3(this);
        }

        public unsafe Matrix3x3 Transpose(TransposeMode transposeMode)
        {
            if (!_isDisposed)
            {
                (*(M128*)_transpose._colum0Ptr).single_0 = (*(M128*)_colum0Ptr).single_0;
                (*(M128*)_transpose._colum0Ptr).single_1 = (*(M128*)_colum1Ptr).single_0;
                (*(M128*)_transpose._colum0Ptr).single_2 = (*(M128*)_colum2Ptr).single_0;

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

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

                _isDisposed = true; 
            }

            switch (transposeMode)
            {
                case TransposeMode.New:
                    return new Matrix3x3(
                        internalIO.load_cpy_internal(_transpose._colum0Ptr),
                        internalIO.load_cpy_internal(_transpose._colum1Ptr),
                        internalIO.load_cpy_internal(_transpose._colum2Ptr)
                        );
                    break;
                case TransposeMode.Copy:
                    return _transpose;
                    break;
                default:
                    throw new Exception();
                    break;
            }

        }

        public static Matrix3x3 operator +(Matrix3x3 matrix1, Matrix3x3 matrix2)
        {
            return new Matrix3x3(
                internalIO.addps_internal(matrix1._colum0Ptr,matrix2._colum0Ptr),
                internalIO.addps_internal(matrix1._colum1Ptr,matrix2._colum1Ptr),
                internalIO.addps_internal(matrix1._colum2Ptr,matrix2._colum2Ptr)
                );
        }

        public static Matrix3x3 operator -(Matrix3x3 matrix1, Matrix3x3 matrix2)
        {
            return new Matrix3x3(
                internalIO.subps_internal(matrix1._colum0Ptr,matrix2._colum0Ptr),
                internalIO.subps_internal(matrix1._colum1Ptr,matrix2._colum1Ptr),
                internalIO.subps_internal(matrix1._colum2Ptr,matrix2._colum2Ptr)
                );
        }

        public static Matrix3x3 operator *(Matrix3x3 matrix, float value)
        {
            return new Matrix3x3(
                internalIO.mulps_const_internal(matrix._colum0Ptr,value),
                internalIO.mulps_const_internal(matrix._colum1Ptr,value),
                internalIO.mulps_const_internal(matrix._colum2Ptr,value)
                );
        }

        public static Matrix3x3 operator /(Matrix3x3 matrix, float value)
        {
            return new Matrix3x3(
                internalIO.divps_const_internal(matrix._colum0Ptr, value),
                internalIO.divps_const_internal(matrix._colum1Ptr, value),
                internalIO.divps_const_internal(matrix._colum2Ptr, value)
                );
        }

        ~Matrix3x3()
        {
            if (map==null)
            {
                internalIO.deinitM128_internal(_colum0Ptr);
                internalIO.deinitM128_internal(_colum1Ptr);
                internalIO.deinitM128_internal(_colum2Ptr);
            }
        }

        

    }
}