#pragma once

#include <cmath>
#include <cstddef>
#include <string>
#include <vector>

class Matrix {
  public:
	typedef long double Element;

  private:
	std::size_t m_Raws;
	std::size_t m_Columns;
	std::vector<Element> m_Data;

  public:
	Matrix() : m_Raws(0), m_Columns(0) {}
	Matrix(std::size_t raws, std::size_t columns);
	Matrix(std::size_t raws, std::size_t columns, std::initializer_list<Element>&& initList);
	~Matrix();

	std::size_t GetRawCount() const;
	std::size_t GetColumnCount() const;

	void Transpose();

	static Matrix Identity(std::size_t size);

	void Augment(const Matrix& right);

	Matrix SubMatrix(std::size_t raw_origin, std::size_t column_origin, std::size_t raw, std::size_t column) const;

	bool operator==(const Matrix& other) const;
	Matrix operator*(const Matrix& other) const;
	Element& operator[](std::size_t index);

	Element& at(std::size_t raw, std::size_t column);
	Element at(std::size_t raw, std::size_t column) const;
};

template <typename T>
bool IsEqualZero(T var) {
	return std::abs(var) < std::pow(10, -5);
}