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/*
 * Copyright 2018 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.jbpm.casemgmt.cmmn.xml;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;

import org.drools.core.xml.ExtensibleXmlParser;
import org.jbpm.process.core.Work;
import org.jbpm.workflow.core.Node;
import org.jbpm.workflow.core.node.DataAssociation;
import org.jbpm.workflow.core.node.HumanTaskNode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Element;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

public class HumanTaskHandler extends AbstractCaseNodeHandler {

    private static final Logger logger = LoggerFactory.getLogger(HumanTaskHandler.class);

    protected Node createNode(Attributes attrs) {
        return new HumanTaskNode();
    }

    protected void handleNode(final Node node,
                              final Element element,
                              final String uri,
                              final String localName,
                              final ExtensibleXmlParser parser) throws SAXException {
        super.handleNode(node, element, uri, localName, parser);
        HumanTaskNode humanTaskNode = (HumanTaskNode) node;
        Work work = humanTaskNode.getWork();
        work.setName("Human Task");

        String performerRef = element.getAttribute("performerRef");

        if (performerRef != null) {
            humanTaskNode.getWork().setParameter("ActorId", performerRef);
        }

        Map inputs = new HashMap<>();
        Map outputs = new HashMap<>();
        Map inputTypes = new HashMap<>();
        Map outputTypes = new HashMap<>();
        loadDataInputsAndOutputs(element, inputs, outputs, inputTypes, outputTypes, parser);

        humanTaskNode.setMetaData("DataInputs", inputTypes);
        humanTaskNode.setMetaData("DataOutputs", outputTypes);
        humanTaskNode.getWork().setParameter("NodeName", humanTaskNode.getName());
        humanTaskNode.getWork().setParameter("TaskName", humanTaskNode.getName().replaceAll("\\s", ""));

        for (Entry entry : inputs.entrySet()) {
            humanTaskNode.addInAssociation(new DataAssociation(entry.getValue(), entry.getKey(), Collections.emptyList(), null));
        }

        for (Entry entry : outputs.entrySet()) {

            humanTaskNode.addOutAssociation(new DataAssociation(entry.getKey(), entry.getValue(), Collections.emptyList(), null));
        }
    }

    @Override
    public Class generateNodeFor() {
        return HumanTaskNode.class;
    }

}