/*
 * Copyright 2015 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.
 * 
 *      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.beliefs.bayes;

import org.drools.core.beliefsystem.BeliefSystem;
import org.drools.core.beliefsystem.ModedAssertion;
import org.drools.core.common.LogicalDependency;
import org.drools.core.util.AbstractBaseLinkedListNode;
import org.kie.internal.runtime.beliefs.Mode;

import java.util.Arrays;

public class BayesHardEvidence<M extends BayesHardEvidence<M>> extends AbstractBaseLinkedListNode<M> implements ModedAssertion<M> {
    private double[] distribution;
    private BeliefSystem<M> beliefSystem;
    private LogicalDependency<M> dep;
    private Mode nextMode;

    public BayesHardEvidence(BeliefSystem<M> beliefSystem,
                             double[] distribution) {
        this.beliefSystem = beliefSystem;
        this.distribution = distribution;
    }

    public BayesHardEvidence(BeliefSystem<M> beliefSystem,
                             double[] distribution,
                             Mode nextMode) {
        this.beliefSystem = beliefSystem;
        this.distribution = distribution;
        this.nextMode = nextMode;
    }

    public LogicalDependency<M> getLogicalDependency() {
        return dep;
    }

    public void setLogicalDependency(LogicalDependency<M> dep) {
        this.dep = dep;
    }

    public double[] getDistribution() {
        return distribution;
    }

    public Mode getNextMode() {
        return nextMode;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) { return true; }
        if (o == null || getClass() != o.getClass()) { return false; }

        BayesHardEvidence that = (BayesHardEvidence) o;

        if (!Arrays.equals(distribution, that.distribution)) { return false; }

        return true;
    }

    @Override
    public int hashCode() {
        return Arrays.hashCode(distribution);
    }

    @Override
    public Object getBeliefSystem() {
        return beliefSystem;
    }
}