/**
 * Copyright 2005-2016 The Kuali Foundation
 *
 * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
 *
 * 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.kuali.rice.krms.impl.ui;

import org.kuali.rice.krad.data.DataObjectService;
import org.kuali.rice.krad.service.KRADServiceLocator;
import org.kuali.rice.krms.api.repository.proposition.PropositionParameterType;
import org.kuali.rice.krms.api.repository.proposition.PropositionType;
import org.kuali.rice.krms.impl.repository.PropositionBo;
import org.kuali.rice.krms.impl.repository.PropositionParameterBo;
import org.kuali.rice.krms.impl.repository.TermBo;

import java.util.List;

/**
 * abstract data class for the rule tree {@link Node}s
 * 
 * @author Kuali Rice Team (rice.collab@kuali.org)
 *
 */
public class SimplePropositionNode extends RuleTreeNode {
    private static final long serialVersionUID = -629088492909384804L;
    public static final String NODE_TYPE = "ruleTreeNode simplePropositionNode";
    protected String parameterDisplayString;

    // needed for inquiry view
    public SimplePropositionNode() {
    }

    public SimplePropositionNode(PropositionBo proposition){
        super(proposition);
        setupParameterDisplayString();
    }
    
    private void setupParameterDisplayString(){
        if (proposition != null && proposition.getPropositionTypeCode().equalsIgnoreCase(PropositionType.SIMPLE.getCode())){
            // Simple Propositions should have 3 parameters ordered in reverse polish notation.
            // TODO: enhance to get term names for term type parameters.
            List<PropositionParameterBo> parameters = proposition.getParameters();
            if (parameters != null && parameters.size() == 3){
                setParameterDisplayString(getParamValue(parameters.get(0)) 
                        + " " + getParamValue(parameters.get(2))
                        + " " + getParamValue(parameters.get(1)));
            } else {
                // should not happen
            }
        }
    }
    
    private String getParamValue(PropositionParameterBo prop){
        if (PropositionParameterType.TERM.getCode().equalsIgnoreCase(prop.getParameterType())){
            //TODO: use termBoService
            String termId = prop.getValue();
            TermBo term = null;
            if (termId!=null) {
                term = getDataObjectService().find(TermBo.class,termId);
            }
            if (term!=null){
                return term.getSpecification().getName();
            }
            return "";
        } else {
            return prop.getValue();
        }
    }
    /**
     * @return the parameterDisplayString
     */
    public String getParameterDisplayString() {
        return this.parameterDisplayString;
    }

    /**
     * @param parameterDisplayString the parameterDisplayString to set
     */
    public void setParameterDisplayString(String parameterDisplayString) {
        this.parameterDisplayString = parameterDisplayString;
    }

    public DataObjectService getDataObjectService() {
        return KRADServiceLocator.getDataObjectService();
    }
    
}
