/*
 * @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
 */

/*! \file
    \ingroup CCLAMBDA
    \brief Enter brief description of file here
*/
#include <cstdio>
#include <cstring>
#include "psi4/libdpd/dpd.h"
#include "MOInfo.h"
#include "Params.h"
#define EXTERN
#include "globals.h"

namespace psi {
namespace cclambda {

void cc2_hbar_extra() {
    dpdbuf4 W1, W2, W;

    /* CC2 W(ME,jb) + W(Me,Jb) is constructed in CCEOM for EOM_CC2 */

    if (params.wfn == "CC2") {
        if (params.ref == 0) { /** RHF **/
            /* 2 W(ME,jb) + W(Me,Jb) */
            global_dpd_->buf4_init(&W1, PSIF_CC2_HET1, 0, 10, 10, 10, 10, 0, "CC2 WMbeJ (Me,Jb)");
            global_dpd_->buf4_copy(&W1, PSIF_CC2_HET1, "CC2 2 W(ME,jb) + W(Me,Jb)");
            global_dpd_->buf4_close(&W1);
            global_dpd_->buf4_init(&W1, PSIF_CC2_HET1, 0, 10, 10, 10, 10, 0, "CC2 2 W(ME,jb) + W(Me,Jb)");
            global_dpd_->buf4_init(&W2, PSIF_CC2_HET1, 0, 10, 10, 10, 10, 0, "CC2 WMbEj (ME,jb)");
            global_dpd_->buf4_axpy(&W2, &W1, 2);
            global_dpd_->buf4_close(&W2);
            global_dpd_->buf4_close(&W1);
        }
    }
}

}  // namespace cclambda
}  // namespace psi
