/*
 * @BEGIN LICENSE
 *
 * Psi4: an open-source quantum chemistry software package
 *
 * Copyright (c) 2007-2019 The Psi4 Developers.
 *
 * The copyrights for code used from other parties are included in
 * the corresponding files.
 *
 * This file is part of Psi4.
 *
 * Psi4 is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, version 3.
 *
 * Psi4 is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along
 * with Psi4; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * @END LICENSE
 */

#include "sapt2p3.h"
#include "psi4/libciomr/libciomr.h"
#include "psi4/libpsio/psio.hpp"
#include "psi4/libqt/qt.h"
#include "psi4/libpsi4util/PsiOutStream.h"

namespace psi {
namespace sapt {

void SAPT2p3::ind_disp30() {
    double **tAR = block_matrix(aoccA_, nvirA_);

    psio_->read_entry(PSIF_SAPT_AMPS, "IndDisp30 uAR Amplitudes", (char *)tAR[0], sizeof(double) * aoccA_ * nvirA_);

    double inddisp_1 = 2.0 * C_DDOT(aoccA_ * nvirA_, tAR[0], 1, wBAR_[foccA_], 1);

    free_block(tAR);

    double **tBS = block_matrix(aoccB_, nvirB_);

    psio_->read_entry(PSIF_SAPT_AMPS, "IndDisp30 uBS Amplitudes", (char *)tBS[0], sizeof(double) * aoccB_ * nvirB_);

    double inddisp_2 = 2.0 * C_DDOT(aoccB_ * nvirB_, tBS[0], 1, wABS_[foccB_], 1);

    free_block(tBS);

    double **B_p_AR = get_DF_ints(PSIF_SAPT_AA_DF_INTS, "AR RI Integrals", foccA_, noccA_, 0, nvirA_);
    double **B_p_BS = get_DF_ints(PSIF_SAPT_BB_DF_INTS, "BS RI Integrals", foccB_, noccB_, 0, nvirB_);

    double **vARBS = block_matrix(aoccA_ * nvirA_, aoccB_ * nvirB_);
    double **tARBS = block_matrix(aoccA_ * nvirA_, aoccB_ * nvirB_);
    psio_->read_entry(PSIF_SAPT_AMPS, "IndDisp30 uARBS Amplitudes", (char *)tARBS[0],
                      sizeof(double) * aoccA_ * nvirA_ * aoccB_ * nvirB_);

    C_DGEMM('N', 'T', aoccA_ * nvirA_, aoccB_ * nvirB_, ndf_ + 3, 1.0, B_p_AR[0], ndf_ + 3, B_p_BS[0], ndf_ + 3, 0.0,
            vARBS[0], aoccB_ * nvirB_);

    double inddisp_3 = 4.0 * C_DDOT((long int)aoccA_ * nvirA_ * aoccB_ * nvirB_, vARBS[0], 1, tARBS[0], 1);

    free_block(B_p_AR);
    free_block(B_p_BS);
    free_block(vARBS);
    free_block(tARBS);

    e_ind_disp30_ = inddisp_1 + inddisp_2 + inddisp_3;

    if (debug_) {
        outfile->Printf("\n    Ind-Disp30_1        = %18.12lf [Eh]\n", inddisp_1);
        outfile->Printf("    Ind-Disp30_2        = %18.12lf [Eh]\n", inddisp_2);
        outfile->Printf("    Ind-Disp30_3        = %18.12lf [Eh]\n", inddisp_3);
    }
    if (print_) {
        outfile->Printf("    Ind-Disp30          = %18.12lf [Eh]\n", e_ind_disp30_);
    }
}
}  // namespace sapt
}  // namespace psi
