#ifndef FESA_SOLVERS_LINEAR_MKL_PARDISO_TANGENT_SOLVER_H_
#define FESA_SOLVERS_LINEAR_MKL_PARDISO_TANGENT_SOLVER_H_

#include <memory>

#include "fesa/solvers/linear/tangent_solver.h"

namespace fesa {

/// @brief Adapts full-CSR unsymmetric oneMKL PARDISO tangent solves.
class MklPardisoTangentSolver final : public TangentSolver {
 public:
  /// @brief Constructs an empty, unfactorized PARDISO tangent adapter.
  MklPardisoTangentSolver();

  /// @brief Releases retained PARDISO tangent backend state.
  ~MklPardisoTangentSolver() override;

  /// @brief Validates and factorizes one fresh nonlinear tangent matrix.
  Status FactorizeFresh(const SparseMatrix& matrix) override;

  /// @brief Solves one correction without refactorizing the tangent.
  Status SolveCorrection(const Vector& rhs, Vector& correction) const override;

 private:
  class Impl;
  std::unique_ptr<Impl> impl_;
};

}  // namespace fesa

#endif  // FESA_SOLVERS_LINEAR_MKL_PARDISO_TANGENT_SOLVER_H_