/*
 * Copyright (c) 1999-2012, Ecole des Mines de Nantes
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Ecole des Mines de Nantes nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package samples;

import org.kohsuke.args4j.CmdLineException;
import org.kohsuke.args4j.CmdLineParser;
import org.kohsuke.args4j.Option;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import solver.Solver;
import solver.explanations.ExplanationFactory;
import solver.propagation.hardcoded.PropagatorEngine;
import solver.search.loop.monitors.SearchMonitorFactory;

/**
 * <br/>
 *
 * @author Charles Prud'homme
 * @since 31/03/11
 */
public abstract class AbstractProblem {

    enum Level {
        SILENT(-10), QUIET(0), VERBOSE(10), SOLUTIONS(20), SEARCH(30);

        int level;

        Level(int level) {
            this.level = level;
        }


        public int getLevel() {
            return level;
        }
    }

    @Option(name = "-log", usage = "Quiet resolution", required = false)
    Level level = Level.VERBOSE;

    @Option(name = "-seed", usage = "Seed for Shuffle propagation engine.", required = false)
    protected long seed = 29091981;

    @Option(name = "-exp", usage = "Explanation engine.", required = false)
    protected ExplanationFactory expeng = ExplanationFactory.NONE;

    protected Solver solver;

    private boolean userInterruption = true;

    public void printDescription() {
    }

    public Solver getSolver() {
        return solver;
    }

    public abstract void createSolver();

    public abstract void buildModel();

    public abstract void configureSearch();

    public abstract void solve();

    public abstract void prettyOut();

    public final boolean readArgs(String... args) {
        CmdLineParser parser = new CmdLineParser(this);
        parser.setUsageWidth(160);
        try {
            parser.parseArgument(args);
        } catch (CmdLineException e) {
            System.err.println(e.getMessage());
            System.err.println("java " + this.getClass() + " [options...]");
            parser.printUsage(System.err);
            System.err.println();
            return false;
        }
        return true;
    }

    protected void overrideExplanation() {
        expeng.make(solver);
    }

    private final boolean userInterruption() {
        return userInterruption;
    }

    public final void execute(String... args) {
        if (this.readArgs(args)) {
            final Logger log = LoggerFactory.getLogger("bench");
            this.printDescription();
            this.createSolver();
            this.buildModel();
            this.configureSearch();

            overrideExplanation();

            solver.set(new PropagatorEngine(solver));

            if (level.getLevel() > Level.QUIET.getLevel()) {
                SearchMonitorFactory.log(solver,
                        level.getLevel() > Level.VERBOSE.getLevel(),
                        level.getLevel() > Level.SOLUTIONS.getLevel());
            }
            Runtime.getRuntime().addShutdownHook(new Thread() {
                public void run() {
                    if (userInterruption()) {
                        if (level.getLevel() > Level.SILENT.getLevel()) {
                            log.info("User interruption...");
                        }
                    }
                    if (level.getLevel() > Level.QUIET.getLevel()) {
                        prettyOut();
                    }
                    if (level.getLevel() > Level.QUIET.getLevel()) {
                        log.info("{}", solver.getMeasures().toString());
                    } else if (level.getLevel() > Level.SILENT.getLevel()) {
                        log.info("[STATISTICS {}]", solver.getMeasures().toOneLineString());
                    }

                }
            });

            this.solve();
            userInterruption = false;
        }
    }

}

@@ -4520,238 +4520,8 @@
 ) %7B%0A
-                    if (userInterruption()) %7B%0A                        if (level.getLevel() %3E Level.SILENT.getLevel()) %7B%0A                            log.info(%22User interruption...%22);%0A                        %7D%0A                    %7D%0A
     
@@ -4973,24 +4973,269 @@
            %7D
+%0A                    if (userInterruption()) %7B%0A                        if (level.getLevel() %3E Level.SILENT.getLevel()) %7B%0A                            log.info(%22Unexpected resolution interruption!%22);%0A                        %7D%0A                    %7D
 %0A%0A          

Move log on user interruption at the end