#pragma once
#include <common.hpp>

namespace sv {

	class Model
	{
	public:
		Model();
		Var* addVars(int col);
		void addConstr(const Expr& expr, ConstrOper sense, double rhs);
		void setObjective(Expr obje, int sense = MDL_MAXIMIZE);
		void print();
		rtn optimize();
		double get(DoubleAttr attr);
		int get(IntAttr attr);
	private:
		double _simplex();
		rtn _pivot(std::pair<size_t, size_t>& p);
		void _gaussian(std::pair<size_t, size_t> p);

		Var* vars;

		matrix mt;
		size_t cn, bn;
		std::vector<int> basic;
		rtn rtn_;
		double res_;
		int sense;
	};
}