//
// Copyright (c) 2009-present Benjamin Kaufmann
//
// This file is part of Clasp. See https://potassco.org/clasp/
//
// 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 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.
//

// Add the libclasp directory to the list of
// include directories of your build system.
#include "example.h"
#include <clasp/clasp_facade.h>
#include <clasp/solver.h>

// This example demonstrates how user code can influence model enumeration.

static void excludeModel(const Clasp::Solver& s, const Clasp::Model& m) {
    Clasp::LitVec clause;
    for (uint32_t i = 1; i <= s.decisionLevel(); ++i) { clause.push_back(~s.decision(i)); }
    m.ctx->commitClause(clause);
}

void example4() {
    Clasp::ClaspConfig config;
    config.solve.enumMode  = Clasp::EnumOptions::enum_user;
    config.solve.numModels = 0;

    // The "interface" to the clasp library.
    Clasp::ClaspFacade libclasp;

    Clasp::Asp::LogicProgram& asp = libclasp.startAsp(config);
    addSimpleProgram(asp);

    libclasp.prepare();

    // Start the actual solving process.
    for (Clasp::ClaspFacade::SolveHandle h = libclasp.solve(Clasp::SolveMode::yield); h.next();) {
        // print the model
        printModel(libclasp.ctx.output, *h.model());
        // exclude this model
        excludeModel(*libclasp.ctx.solver(h.model()->sId), *h.model());
    }
    std::cout << "No more models!" << std::endl;
}
