/*
 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
 *
 * 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.optimisation;

import org.drools.core.base.RuleNameMatchesAgendaFilter;
import org.drools.verifier.TestBaseOld;
import org.drools.verifier.components.Restriction;
import org.drools.verifier.components.RuleComponent;
import org.drools.verifier.data.VerifierReport;
import org.drools.verifier.data.VerifierReportFactory;
import org.drools.verifier.report.components.Severity;
import org.drools.verifier.report.components.VerifierMessage;
import org.drools.verifier.report.components.VerifierMessageBase;
import org.junit.Test;
import org.kie.api.runtime.KieSession;

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

import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

public class RestrictionOrderTest extends TestBaseOld {

    @Test
    public void testRestrictionOrderInsideOperator() throws Exception {
        KieSession session = getStatelessKieSession(this.getClass().getResourceAsStream("RestrictionOrder.drl"));

        VerifierReport result = VerifierReportFactory.newVerifierReport();
        Collection<? extends Object> testData = getTestData(this.getClass().getResourceAsStream("OptimisationRestrictionOrderTest.drl"),
                                                            result.getVerifierData());

        //        for ( Object object : testData ) {
        //            if ( object instanceof SubPattern ) {
        //                SubPattern s = (SubPattern) object;
        //                System.out.println( " - " + s );
        //                for ( PatternComponent o : s.getItems() ) {
        //                    System.out.println( " -- " + o + " : " + o.getOrderNumber() );
        //                }
        //            }
        //        }

        session.setGlobal("result",
                          result);

        for (Object o : testData) {
            session.insert(o);
        }
        session.fireAllRules(new RuleNameMatchesAgendaFilter("Optimise restrictions inside operator"));

        Iterator<VerifierMessageBase> iter = result.getBySeverity(Severity.NOTE).iterator();

        Collection<String> ruleNames = new ArrayList<String>();
        while (iter.hasNext()) {
            Object o = (Object) iter.next();
            if (o instanceof VerifierMessage) {
                String name = ((VerifierMessage) o).getCauses().toArray(new Restriction[2])[0].getRuleName();

                ruleNames.add(name);
            }
        }

        assertTrue(ruleNames.remove("Wrong descr order 1"));

        if (!ruleNames.isEmpty()) {
            for (String string : ruleNames) {
                fail("Rule " + string + " caused an error.");
            }
        }
    }

    @Test
    public void testPredicateOrderInsideOperator() throws Exception {
        KieSession session = getStatelessKieSession(this.getClass().getResourceAsStream("RestrictionOrder.drl"));

        VerifierReport result = VerifierReportFactory.newVerifierReport();
        Collection<? extends Object> testData = getTestData(this.getClass().getResourceAsStream("OptimisationRestrictionOrderTest.drl"),
                                                            result.getVerifierData());

        session.setGlobal("result",
                          result);

        for (Object o : testData) {
            session.insert(o);
        }
        session.fireAllRules(new RuleNameMatchesAgendaFilter("Optimise predicates inside operator"));

        Iterator<VerifierMessageBase> iter = result.getBySeverity(Severity.NOTE).iterator();

        Collection<String> ruleNames = new ArrayList<String>();
        while (iter.hasNext()) {
            Object o = (Object) iter.next();
            if (o instanceof VerifierMessage) {
                String name = ((VerifierMessage) o).getCauses().toArray(new RuleComponent[2])[0].getRuleName();

                ruleNames.add(name);
            }
        }

        assertTrue(ruleNames.remove("Wrong eval order 1"));

        if (!ruleNames.isEmpty()) {
            for (String string : ruleNames) {
                fail("Rule " + string + " caused an error.");
            }
        }
    }
}