#pragma once

#include "./utils/vector.h"
#include "./utils/matrix.h"
#include "./core/omp_config.h"

namespace numerics{
	
	template <typename T>
	T matmean(const utils::Matrix<T>& A) {

		T mean(T{0});
	    
	    const uint64_t rows = A.rows();
	    const uint64_t cols = A.cols();


	    for (uint64_t i = 0; i < cols; ++i) {
	        for (uint64_t j = 0; j < rows; ++j) {
	            mean += A(j, i);
	        }
	    }
	    mean /= (static_cast<T>(rows)* static_cast<T>(cols));
	    return mean;
	}


	template <typename T>
	void inplace_matmean_row(const utils::Matrix<T>& A, utils::Vector<T>& b) {
    
	    const uint64_t rows = A.rows();
	    const uint64_t cols = A.cols();

		if (b.size() != cols){
			b.resize(cols, T{0});
		}

    	for(uint64_t j = 0; j < cols; ++j){
    		for (uint64_t i = 0; i < rows; ++i){
    			b[j] += A(i, j);
    		}
    		b[j] /= static_cast<T>(rows);
    	}
	}

	template <typename T>
	void inplace_matmean_cols(const utils::Matrix<T>& A, utils::Vector<T>& b) {

	    const uint64_t rows = A.rows();
	    const uint64_t cols = A.cols();

		if (b.size() != rows){
			b.resize(rows, T{0});
		}
		
    	for(uint64_t i = 0; i < rows; ++i){
    		for (uint64_t j = 0; j < cols; ++j){
    			b[i] += A(i, j);
    		}
    		b[i] /= static_cast<T>(cols);
    	}
	}


	template <typename T>
	utils::Vector<T> matmean_row(const utils::Matrix<T>& A) {
    
	    utils::Vector<T> b(A.rows(), T{0});

	    inplace_matmean_row(A, b);
	    
	    return b;
	}

	template <typename T>
	utils::Vector<T> matmean_col(const utils::Matrix<T>& A) {

	    utils::Vector<T> b(A.cols(), T{0});

	    inplace_matmean_cols(A, b);
	    
	    return b;
	}

} // namespace numerics