/* -------------------------------------------------------------------------- *
 *                                   OpenMM                                   *
 * -------------------------------------------------------------------------- *
 * This is part of the OpenMM molecular simulation toolkit.                   *
 * See https://openmm.org/development.                                        *
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 * Portions copyright (c) 2010-2017 Stanford University and the Authors.      *
 * Authors: Peter Eastman                                                     *
 * Contributors:                                                              *
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#include "openmm/internal/AssertionUtilities.h"
#include "openmm/CustomCVForce.h"
#include "openmm/HarmonicAngleForce.h"
#include "openmm/HarmonicBondForce.h"
#include "openmm/serialization/XmlSerializer.h"
#include <iostream>
#include <sstream>

using namespace OpenMM;
using namespace std;

void testSerialization() {
    // Create a Force.

    CustomCVForce force("2*v1+v2");
    force.setForceGroup(3);
    force.setName("custom name");
    force.addGlobalParameter("x", 1.3);
    force.addGlobalParameter("y", 2.221);
    force.addEnergyParameterDerivative("y");
    HarmonicBondForce* v1 = new HarmonicBondForce();
    v1->addBond(2, 3, 5.2, 1.1);
    force.addCollectiveVariable("v1", v1);
    HarmonicAngleForce* v2 = new HarmonicAngleForce();
    v2->addAngle(3, 11, 15, 0.4, 0.2);
    force.addCollectiveVariable("v2", v2);
    vector<double> values(10);
    for (int i = 0; i < 10; i++)
        values[i] = sin((double) i);
    force.addTabulatedFunction("f", new Continuous1DFunction(values, 0.5, 1.5));

    // Serialize and then deserialize it.

    stringstream buffer;
    XmlSerializer::serialize<CustomCVForce>(&force, "Force", buffer);
    CustomCVForce* copy = XmlSerializer::deserialize<CustomCVForce>(buffer);

    // Compare the two forces to see if they are identical.

    CustomCVForce& force2 = *copy;
    ASSERT_EQUAL(force.getForceGroup(), force2.getForceGroup());
    ASSERT_EQUAL(force.getName(), force2.getName());
    ASSERT_EQUAL(force.getEnergyFunction(), force2.getEnergyFunction());
    ASSERT_EQUAL(force.getNumGlobalParameters(), force2.getNumGlobalParameters());
    for (int i = 0; i < force.getNumGlobalParameters(); i++) {
        ASSERT_EQUAL(force.getGlobalParameterName(i), force2.getGlobalParameterName(i));
        ASSERT_EQUAL(force.getGlobalParameterDefaultValue(i), force2.getGlobalParameterDefaultValue(i));
    }
    ASSERT_EQUAL(force.getNumEnergyParameterDerivatives(), force2.getNumEnergyParameterDerivatives());
    for (int i = 0; i < force.getNumEnergyParameterDerivatives(); i++)
        ASSERT_EQUAL(force.getEnergyParameterDerivativeName(i), force2.getEnergyParameterDerivativeName(i));
    ASSERT_EQUAL(force.getNumCollectiveVariables(), force2.getNumCollectiveVariables());
    for (int i = 0; i < force.getNumCollectiveVariables(); i++) {
        ASSERT_EQUAL(force.getCollectiveVariableName(i), force2.getCollectiveVariableName(i));
        stringstream buffer1, buffer2;
        XmlSerializer::serialize<Force>(&force.getCollectiveVariable(i), "Force", buffer1);
        XmlSerializer::serialize<Force>(&force2.getCollectiveVariable(i), "Force", buffer2);
        ASSERT_EQUAL(buffer1.str(), buffer2.str());
    }
    ASSERT_EQUAL(force.getNumTabulatedFunctions(), force2.getNumTabulatedFunctions());
    for (int i = 0; i < force.getNumTabulatedFunctions(); i++) {
        double min1, min2, max1, max2;
        vector<double> val1, val2;
        dynamic_cast<Continuous1DFunction&>(force.getTabulatedFunction(i)).getFunctionParameters(val1, min1, max1);
        dynamic_cast<Continuous1DFunction&>(force2.getTabulatedFunction(i)).getFunctionParameters(val2, min2, max2);
        ASSERT_EQUAL(force.getTabulatedFunctionName(i), force2.getTabulatedFunctionName(i));
        ASSERT_EQUAL(min1, min2);
        ASSERT_EQUAL(max1, max2);
        ASSERT_EQUAL(val1.size(), val2.size());
        for (int j = 0; j < (int) val1.size(); j++)
            ASSERT_EQUAL(val1[j], val2[j]);
    }
}

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