/**
 * Copyright 2010 JBoss Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.drools.verifier.redundancy;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;

import org.drools.StatelessSession;
import org.drools.base.RuleNameMatchesAgendaFilter;
import org.drools.verifier.TestBase;
import org.drools.verifier.VerifierComponentMockFactory;
import org.drools.verifier.components.LiteralRestriction;
import org.drools.verifier.components.Pattern;
import org.drools.verifier.components.SubPattern;
import org.drools.verifier.components.SubRule;
import org.drools.verifier.components.VerifierRule;
import org.drools.verifier.data.VerifierReport;
import org.drools.verifier.data.VerifierReportFactory;
import org.drools.verifier.report.components.Cause;
import org.drools.verifier.report.components.Redundancy;
import org.drools.verifier.report.components.Severity;
import org.drools.verifier.report.components.VerifierMessageBase;

public class NotesTest extends TestBase {

    public void testRedundantRestrictionsInPatternPossibilities() throws Exception {
        StatelessSession session = getStatelessSession( this.getClass().getResourceAsStream( "Notes.drl" ) );

        session.setAgendaFilter( new RuleNameMatchesAgendaFilter( "Find redundant restrictions from pattern possibilities" ) );

        Pattern pattern = VerifierComponentMockFactory.createPattern1();

        Collection<Object> objects = new ArrayList<Object>();
        LiteralRestriction left = LiteralRestriction.createRestriction( pattern,
                                                                        "" );

        LiteralRestriction right = LiteralRestriction.createRestriction( pattern,
                                                                         "" );

        Redundancy redundancy = new Redundancy( left,
                                                right );

        SubPattern possibility = new SubPattern( pattern,
                                                 0 );
        possibility.add( left );
        possibility.add( right );

        objects.add( left );
        objects.add( right );
        objects.add( redundancy );
        objects.add( possibility );

        VerifierReport result = VerifierReportFactory.newVerifierReport();
        session.setGlobal( "result",
                           result );

        session.executeWithResults( objects );

        Collection<VerifierMessageBase> notes = result.getBySeverity( Severity.NOTE );

        // Has at least one item.
        assertEquals( 1,
                      notes.size() );

        VerifierMessageBase note = notes.iterator().next();
        Iterator<Cause> causes = note.getCauses().iterator();

        assertEquals( left,
                      causes.next() );
        assertEquals( right,
                      causes.next() );
    }

    public void testRedundantPatternPossibilitiesInRulePossibilities() throws Exception {
        StatelessSession session = getStatelessSession( this.getClass().getResourceAsStream( "Notes.drl" ) );

        session.setAgendaFilter( new RuleNameMatchesAgendaFilter( "Find redundant pattern possibilities from rule possibilities" ) );

        VerifierRule rule = VerifierComponentMockFactory.createRule1();
        Pattern pattern = VerifierComponentMockFactory.createPattern1();

        Collection<Object> objects = new ArrayList<Object>();
        SubPattern left = new SubPattern( pattern,
                                          0 );

        SubPattern right = new SubPattern( pattern,
                                           1 );

        Redundancy redundancy = new Redundancy( left,
                                                right );

        SubRule possibility = new SubRule( rule,
                                           0 );
        possibility.add( left );
        possibility.add( right );

        objects.add( left );
        objects.add( right );
        objects.add( redundancy );
        objects.add( possibility );

        VerifierReport result = VerifierReportFactory.newVerifierReport();
        session.setGlobal( "result",
                           result );

        session.executeWithResults( objects );

        Collection<VerifierMessageBase> notes = result.getBySeverity( Severity.NOTE );

        // Has at least one item.
        assertEquals( 1,
                      notes.size() );

        VerifierMessageBase note = notes.iterator().next();
        Iterator<Cause> causes = note.getCauses().iterator();

        assertEquals( left,
                      causes.next() );
        assertEquals( right,
                      causes.next() );
    }
}