/* -------------------------------------------------------------------------- *
 *                                OpenMMAmoeba                                *
 * -------------------------------------------------------------------------- *
 * This is part of the OpenMM molecular simulation toolkit originating from   *
 * Simbios, the NIH National Center for Physics-Based Simulation of           *
 * Biological Structures at Stanford, funded under the NIH Roadmap for        *
 * Medical Research, grant U54 GM072970. See https://simtk.org.               *
 *                                                                            *
 * Portions copyright (c) 2010 Stanford University and the Authors.           *
 * Authors: Peter Eastman                                                     *
 * Contributors:                                                              *
 *                                                                            *
 * Permission is hereby granted, free of charge, to any person obtaining a    *
 * copy of this software and associated documentation files (the "Software"), *
 * to deal in the Software without restriction, including without limitation  *
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,   *
 * and/or sell copies of the Software, and to permit persons to whom the      *
 * Software is furnished to do so, subject to the following conditions:       *
 *                                                                            *
 * The above copyright notice and this permission notice shall be included in *
 * all copies or substantial portions of the Software.                        *
 *                                                                            *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,   *
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL    *
 * THE AUTHORS, CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,    *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR      *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE  *
 * USE OR OTHER DEALINGS IN THE SOFTWARE.                                     *
 * -------------------------------------------------------------------------- */

#include "openmm/Platform.h"
#include "openmm/internal/AssertionUtilities.h"
#include "openmm/AmoebaMultipoleForce.h"
#include "openmm/serialization/XmlSerializer.h"
#include <iostream>
#include <sstream>
#include <stdlib.h>

using namespace OpenMM;
using namespace std;

static void getCovalentTypes( std::vector<std::string>& covalentTypes ){

    covalentTypes.push_back( "Covalent12" );
    covalentTypes.push_back( "Covalent13" );
    covalentTypes.push_back( "Covalent14" );
    covalentTypes.push_back( "Covalent15" );

    covalentTypes.push_back( "PolarizationCovalent11" );
    covalentTypes.push_back( "PolarizationCovalent12" );
    covalentTypes.push_back( "PolarizationCovalent13" );
    covalentTypes.push_back( "PolarizationCovalent14" );
}

void testSerialization() {
    // Create a Force.

    AmoebaMultipoleForce force1;
    force1.setNonbondedMethod( AmoebaMultipoleForce::NoCutoff );
    force1.setCutoffDistance( 0.9 );
    force1.setAEwald( 0.544 );
    //force1.setPmeBSplineOrder( 4 );

    std::vector<int> gridDimension;
    gridDimension.push_back( 64 );
    gridDimension.push_back( 63 );
    gridDimension.push_back( 61 );
    force1.setPmeGridDimensions( gridDimension ); 
    //force1.setMutualInducedIterationMethod( AmoebaMultipoleForce::SOR ); 
    force1.setMutualInducedMaxIterations( 200 ); 
    force1.setMutualInducedTargetEpsilon( 1.0e-05 ); 
    //force1.setElectricConstant( 138.93 ); 
    force1.setEwaldErrorTolerance( 1.0e-05 ); 

    std::vector<std::string> covalentTypes;
    getCovalentTypes( covalentTypes );

    for( unsigned int ii = 0; ii < 3; ii++ ){
        std::vector<double> molecularDipole;
        std::vector<double> molecularQuadrupole;
        molecularDipole.push_back( 0.1 ); molecularDipole.push_back( rand() ); molecularDipole.push_back( rand() );
        for( unsigned int jj = 0; jj < 9; jj++ ){
            molecularQuadrupole.push_back( static_cast<double>(rand()) );
        }
        force1.addMultipole( static_cast<double>(ii+1), molecularDipole, molecularQuadrupole, AmoebaMultipoleForce::Bisector,
                            ii+1, ii+2, ii+3, static_cast<double>(rand()), static_cast<double>(rand()), static_cast<double>(rand()) );

        for( unsigned int jj = 0; jj < covalentTypes.size(); jj++ ){
            std::vector< int > covalentMap;
            covalentMap.push_back( ii*jj ); covalentMap.push_back( rand() ); covalentMap.push_back( rand() );
            force1.setCovalentMap( ii, static_cast<AmoebaMultipoleForce::CovalentType>(jj), covalentMap);
        }
    }

    // Serialize and then deserialize it.

    stringstream buffer;
    XmlSerializer::serialize<AmoebaMultipoleForce>(&force1, "Force", buffer);
#ifdef AMOEBA_DEBUG
    if( 0 ){
        FILE* filePtr = fopen("Multipole.xml", "w" );
        (void) fprintf( filePtr, "%s", buffer.str().c_str() );
        (void) fclose( filePtr );
    }
#endif

    AmoebaMultipoleForce* copy = XmlSerializer::deserialize<AmoebaMultipoleForce>(buffer);

    // Compare the two forces to see if they are identical.  
    AmoebaMultipoleForce& force2 = *copy;

    ASSERT_EQUAL(force1.getCutoffDistance(),                force2.getCutoffDistance());
    ASSERT_EQUAL(force1.getNonbondedMethod(),               force2.getNonbondedMethod());
    ASSERT_EQUAL(force1.getAEwald(),                        force2.getAEwald());
    //ASSERT_EQUAL(force1.getPmeBSplineOrder(),               force2.getPmeBSplineOrder());
    //ASSERT_EQUAL(force1.getMutualInducedIterationMethod(),  force2.getMutualInducedIterationMethod());
    ASSERT_EQUAL(force1.getMutualInducedMaxIterations(),    force2.getMutualInducedMaxIterations());
    ASSERT_EQUAL(force1.getMutualInducedTargetEpsilon(),    force2.getMutualInducedTargetEpsilon());
    //ASSERT_EQUAL(force1.getElectricConstant(),              force2.getElectricConstant());
    ASSERT_EQUAL(force1.getEwaldErrorTolerance(),           force2.getEwaldErrorTolerance());


    std::vector<int> gridDimension1;
    std::vector<int> gridDimension2;
    force1.getPmeGridDimensions( gridDimension1 ); 
    force2.getPmeGridDimensions( gridDimension2 ); 
    ASSERT_EQUAL(gridDimension1.size(),  gridDimension2.size());
    for( unsigned int jj = 0; jj < gridDimension1.size(); jj++ ){
        ASSERT_EQUAL(gridDimension1[jj], gridDimension2[jj]);
    }
    
    ASSERT_EQUAL(force1.getNumMultipoles(),  force2.getNumMultipoles());
    for (unsigned int ii = 0; ii < static_cast<unsigned int>(force1.getNumMultipoles()); ii++) {

        int axisType1, multipoleAtomZ1, multipoleAtomX1, multipoleAtomY1;
        int axisType2, multipoleAtomZ2, multipoleAtomX2, multipoleAtomY2;

        double charge1, thole1, dampingFactor1, polarity1;
        double charge2, thole2, dampingFactor2, polarity2;

        std::vector<double> molecularDipole1;
        std::vector<double> molecularQuadrupole1;

        std::vector<double> molecularDipole2;
        std::vector<double> molecularQuadrupole2;

        force1.getMultipoleParameters( ii, charge1, molecularDipole1, molecularQuadrupole1, axisType1, multipoleAtomZ1, multipoleAtomX1, multipoleAtomY1,
                                       thole1, dampingFactor1, polarity1 );

        force2.getMultipoleParameters( ii, charge2, molecularDipole2, molecularQuadrupole2, axisType2, multipoleAtomZ2, multipoleAtomX2, multipoleAtomY2,
                                       thole2, dampingFactor2, polarity2 );

        ASSERT_EQUAL(charge1,                        charge2);
        ASSERT_EQUAL(axisType1,                      axisType2);
        ASSERT_EQUAL(multipoleAtomZ1,                multipoleAtomZ2);
        ASSERT_EQUAL(multipoleAtomX1,                multipoleAtomX2);
        ASSERT_EQUAL(multipoleAtomY1,                multipoleAtomY2);
        ASSERT_EQUAL(thole1,                         thole2);
        ASSERT_EQUAL(dampingFactor1,                 dampingFactor2);
        ASSERT_EQUAL(polarity1,                      polarity2);

        ASSERT_EQUAL(molecularDipole1.size(),        molecularDipole2.size() );
        ASSERT_EQUAL(molecularDipole1.size(),        3 );
        for (unsigned int jj = 0; jj < molecularDipole1.size(); jj++) {
            ASSERT_EQUAL(molecularDipole1[jj], molecularDipole2[jj] );
        }
        ASSERT_EQUAL(molecularQuadrupole1.size(),        molecularQuadrupole2.size() );
        ASSERT_EQUAL(molecularQuadrupole1.size(),        9 );
        for (unsigned int jj = 0; jj < molecularQuadrupole1.size(); jj++) {
            ASSERT_EQUAL(molecularQuadrupole1[jj], molecularQuadrupole2[jj] );
        }

        for (unsigned int jj = 0; jj < covalentTypes.size(); jj++) {
            std::vector<int> covalentMap1;
            std::vector<int> covalentMap2;
            force1.getCovalentMap( ii, static_cast<AmoebaMultipoleForce::CovalentType>(jj), covalentMap1 );
            force2.getCovalentMap( ii, static_cast<AmoebaMultipoleForce::CovalentType>(jj), covalentMap2 );
            ASSERT_EQUAL(covalentMap1.size(),        covalentMap2.size() );
            for (unsigned int kk = 0; kk < covalentMap1.size(); kk++) {
                ASSERT_EQUAL(covalentMap1[kk],        covalentMap2[kk] );
            }
        }
    }
}

int main() {
    try {
        testSerialization();
    }
    catch(const exception& e) {
        cout << "exception: " << e.what() << endl;
        return 1;
    }
    cout << "Done" << endl;
    return 0;
}

