/* -------------------------------------------------------------------------- *
 *                                   OpenMM                                   *
 * -------------------------------------------------------------------------- *
 * This is part of the OpenMM molecular simulation toolkit.                   *
 * See https://openmm.org/development.                                        *
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 * Portions copyright (c) 2010-2016 Stanford University and the Authors.      *
 * Authors: Peter Eastman                                                     *
 * Contributors:                                                              *
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#include "openmm/internal/AssertionUtilities.h"
#include "openmm/CMAPTorsionForce.h"
#include "openmm/serialization/XmlSerializer.h"
#include <iostream>
#include <sstream>

using namespace OpenMM;
using namespace std;

void testSerialization() {
    // Create a Force.

    CMAPTorsionForce force;
    force.setForceGroup(3);
    force.setName("custom name");
    vector<double> map1(9);
    for (int i = 0; i < 9; i++)
        map1[i] = 0.1*i;
    force.addMap(3, map1);
    vector<double> map2(16);
    for (int i = 0; i < 16; i++)
        map2[i] = 0.2*i;
    force.addMap(4, map2);
    force.addTorsion(0, 0, 1, 2, 3, 2, 3, 4, 5);
    force.addTorsion(0, 0, 2, 3, 4, 5, 6, 7, 8);
    force.addTorsion(1, 2, 3, 4, 7, 1, 2, 3, 4);
    force.addTorsion(1, 5, 1, 2, 3, 2, 3, 4, 8);
    force.setUsesPeriodicBoundaryConditions(true);

    // Serialize and then deserialize it.

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

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

    CMAPTorsionForce& force2 = *copy;
    ASSERT_EQUAL(force.getForceGroup(), force2.getForceGroup());
    ASSERT_EQUAL(force.getName(), force2.getName());
    ASSERT_EQUAL(force.usesPeriodicBoundaryConditions(), force2.usesPeriodicBoundaryConditions());
    ASSERT_EQUAL(force.getNumMaps(), force2.getNumMaps());
    for (int i = 0; i < force.getNumMaps(); i++) {
        int size1, size2;
        vector<double> energy1, energy2;
        force.getMapParameters(i, size1, energy1);
        force2.getMapParameters(i, size2, energy2);
        ASSERT_EQUAL(size1, size2);
        ASSERT_EQUAL(energy1.size(), energy2.size());
        for (int j = 0; j < (int) energy1.size(); j++)
            ASSERT_EQUAL(energy1[j], energy2[j]);
    }
    ASSERT_EQUAL(force.getNumTorsions(), force2.getNumTorsions());
    for (int i = 0; i < force.getNumTorsions(); i++) {
        int map1, map2;
        int a11, a21, a31, a41, a12, a22, a32, a42;
        int b11, b21, b31, b41, b12, b22, b32, b42;
        force.getTorsionParameters(i, map1, a11, a21, a31, a41, b11, b21, b31, b41);
        force2.getTorsionParameters(i, map2, a12, a22, a32, a42, b12, b22, b32, b42);
        ASSERT_EQUAL(map1, map2);
        ASSERT_EQUAL(a11, a12);
        ASSERT_EQUAL(a21, a22);
        ASSERT_EQUAL(a31, a32);
        ASSERT_EQUAL(a41, a42);
        ASSERT_EQUAL(b11, b12);
        ASSERT_EQUAL(b21, b22);
        ASSERT_EQUAL(b31, b32);
        ASSERT_EQUAL(b41, b42);
    }
}

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