#ifndef MATRIX_H
#define MATRIX_H

#include <memory>
#include <complex>
#include <vector>


namespace Aurora {
    enum ValueType{
        Normal=1,
        Complex
    };
    const int $ = -1;
    
    class Matrix {
    public:
        /**
         * 内部类MatrixSlice，用于切片操作
         */
        class MatrixSlice{
        public:
            MatrixSlice(int aSize,int aStride, double* aData,ValueType aType = Normal,int SliceMode = 1,int aSize2 = 0, int aStride2 = 0);
            MatrixSlice& operator=(const MatrixSlice& slice);
            MatrixSlice& operator=(const Matrix& matrix);
            MatrixSlice& operator=(double value);
            MatrixSlice& operator=(std::complex<double> value);
            Matrix toMatrix() const;
        private:
            int mSliceMode = 0;//0 scalar, 1 vector, 2 Matrix
            double* mData;
            int mSize=0;
            int mSize2=0;
            int mStride=1;
            int mStride2=0;
            ValueType mType;
            friend class Matrix;
        };
        explicit Matrix(std::shared_ptr<double> aData = std::shared_ptr<double>(),
                        std::vector<int> aInfo = std::vector<int>());

        explicit Matrix(const Matrix::MatrixSlice& slice);

        static Matrix New(double *data, int rows, int cols = 0, int slices = 0, ValueType type = Normal);

        static Matrix New(double *data, const Matrix &shapeMatrix);

        static Matrix New(const Matrix &shapeMatrix);

        Matrix getDataFromDims2(int aColumn);

        Matrix getDataFromDims1(int aRow);

        /**
         * 深拷贝操作
         * @return 深拷贝的Matrix对象
         */
        Matrix deepCopy() const;

        //切片，暂时不支持三维
        MatrixSlice operator()(int r, int c = $, int aSliceIdx = $) const;

        // add
        Matrix operator+(double aScalar) const;
        friend Matrix operator+(double aScalar, const Matrix &matrix);
        friend Matrix& operator+(double aScalar, Matrix &&matrix);
        friend Matrix& operator+(Matrix &&matrix,double aScalar);
        Matrix operator+(const Matrix &matrix) const;
        Matrix operator+(Matrix &&matrix) const;
        friend Matrix operator+(Matrix &&aMatrix,const Matrix &aOther);

        // sub
        Matrix operator-(double aScalar) const;
        friend Matrix operator-(double aScalar, const Matrix &matrix);
        friend Matrix& operator-(double aScalar, Matrix &&matrix);
        friend Matrix& operator-(Matrix &&matrix,double aScalar);
        Matrix operator-(const Matrix &matrix) const;
        Matrix operator-(Matrix &&matrix) const;
        friend Matrix operator-(Matrix &&aMatrix,const Matrix &aOther);

        // mul
        Matrix operator*(double aScalar) const;
        friend Matrix operator*(double aScalar, const Matrix &matrix);
        friend Matrix& operator*(double aScalar, Matrix &&matrix);
        friend Matrix& operator*(Matrix &&matrix,double aScalar);
        Matrix operator*(const Matrix &matrix) const;
        Matrix operator*(Matrix &&matrix) const;
        friend Matrix operator*(Matrix &&aMatrix,const Matrix &aOther);

        // div
        Matrix operator/(double aScalar) const;
        friend Matrix operator/(double aScalar, const Matrix &matrix);
        friend Matrix& operator/(double aScalar, Matrix &&matrix);
        friend Matrix& operator/(Matrix &&matrix,double aScalar);
        Matrix operator/(const Matrix &matrix) const;
        Matrix operator/(Matrix &&matrix) const;
        friend Matrix operator/(Matrix &&aMatrix,const Matrix &aOther);

        // pow
        Matrix operator^(int times) const;
        friend Matrix operator^(Matrix &&matrix,int times);

        /**
         * print matrix , only support 2d matrix now
         */
        void printf();

        /**
         * Get is the Matrix's data is empty or size is zero.
         * @return
         */
        bool isNull() const;

        /**
         * Get dimension count of the matrix
         * @return  dimension count
         */
        int getDims() const;

        double *getData() const;

        int getDimSize(int index) const;

        /**
         * Compare matrix shape
         * @param other matrix
         * @return is identity
         */
        bool compareShape(const Matrix& other) const;

        /**
         * Get the data size
         * @return the unit count of the matrix
         */
        size_t getDataSize() const;

        /**
         * Get Value type as normal and complex,
         * complex use std::complex<double>,
         * it's contains two double value.
         * @return
         */
        ValueType getValueType() const {
            return mValueType;
        }

        /**
         * Set Value type as normal and complex,
         * @return
         */
        void setValueType(ValueType aValueType) {
            mValueType = aValueType;
        }

    private:
        ValueType mValueType = Normal;
        std::shared_ptr<double> mData;
        std::vector<int> mInfo;
    };
}

#endif