#!/usr/bin/env python
# (C) 2022 Cadence Design Systems, Inc. (Cadence) 
# All rights reserved.
# TERMS FOR USE OF SAMPLE CODE The software below ("Sample Code") is
# provided to current licensees or subscribers of Cadence products or
# SaaS offerings (each a "Customer").
# Customer is hereby permitted to use, copy, and modify the Sample Code,
# subject to these terms. Cadence claims no rights to Customer's
# modifications. Modification of Sample Code is at Customer's sole and
# exclusive risk. Sample Code may require Customer to have a then
# current license or subscription to the applicable Cadence offering.
# THE SAMPLE CODE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED.  OPENEYE DISCLAIMS ALL WARRANTIES, INCLUDING, BUT
# NOT LIMITED TO, WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
# PARTICULAR PURPOSE AND NONINFRINGEMENT. In no event shall Cadence be
# liable for any damages or liability in connection with the Sample Code
# or its use.

import sys

from openeye import oechem
from openeye import oeszybki


def main(argv=[__name__]):
    szOpts = oeszybki.OEBoundEntropyOptions()
    opts = oechem.OERefInputAppOptions(szOpts, "BoundEntropy", oechem.OEFileStringType_Mol3D,
                                       oechem.OEFileStringType_DU, "-du")
    if oechem.OEConfigureOpts(opts, argv, False) == oechem.OEOptsConfigureStatus_Help:
        return 0
    szOpts.UpdateValues(opts)

    ifs = oechem.oemolistream()
    if not ifs.open(opts.GetInFile()):
        oechem.OEThrow.Fatal("Unable to open %s for reading" % opts.GetInFile())

    rfs = oechem.oeifstream()
    if not rfs.open(opts.GetRefFile()):
        oechem.OEThrow.Fatal("Unable to open %s for reading" % opts.GetRefFile())

    du = oechem.OEDesignUnit()
    if not oechem.OEReadDesignUnit(rfs, du):
        oechem.OEThrow.Fatal("Failed to read design unit")

    for mol in ifs.GetOEMols():
        oechem.OEThrow.Info("Title: %s" % mol.GetTitle())
        res = oeszybki.OEEntropyResults()
        ret_code = oeszybki.OEBoundLigandEntropy(res, du, oechem.OEDesignUnitComponents_Protein, mol, szOpts)
        if ret_code == oeszybki.OESzybkiReturnCode_Success:
            oechem.OEThrow.Info("  Configurational Entropy: %0.2f" % res.GetConfigurationalEntropy())
            oechem.OEThrow.Info("  Solvation Entropy: %0.2f" % res.GetSolvationEntropy())
            oechem.OEThrow.Info("  Total Entropy: %0.2f" % res.GetTotalEntropy())
        else:
            oechem.OEThrow.Warning("Failed: %s" % oeszybki.OEGetSzybkiError(ret_code))
    return 0


if __name__ == "__main__":
    sys.exit(main(sys.argv))