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package atom.app.kie;

import atom.app.Activity;
import atom.app.KieActivity;
import atom.kie.AbstractTask;
import org.kie.api.runtime.process.WorkItem;
import org.kie.api.runtime.process.WorkItemManager;
import org.kie.internal.runtime.StatefulKnowledgeSession;

import javax.jcr.Node;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import java.math.BigDecimal;
import java.util.Calendar;
import java.util.Map;

/**
 * Update entity work item handler with KIE session.
 *
 * @author Alex Voloshyn
 * @author Vladimir Ovcharov
 * @version 1.4 3/10/15
 */
public final class UpdateEntityTaskWorkItemHandler extends AbstractTask {
    /**
     * Default constructor with KIE session.
     *
     * @param kieSession KIE session to use
     */
    public UpdateEntityTaskWorkItemHandler(
            final StatefulKnowledgeSession kieSession) {
        super(kieSession);
    }

    @Override
    public void executeWorkItem(final WorkItem item,
                                final WorkItemManager manager) {
        final String identifier = (String) item.getParameters().remove("id");
        final Activity activity =
                (Activity) getVariable(item, KieActivity.ACTIVITY);
        try {
            final Session session = activity.getNewJcrSession();
            final Node entity = session.getNodeByIdentifier(identifier);
            item.getParameters().remove("TaskName");
            for (Map.Entry entry
                    : item.getParameters().entrySet()) {
                final String key = entry.getKey();
                final int lastIndex = key.lastIndexOf('/');
                final Node node;
                final String property;
                if (lastIndex > -1) {
                    final String path = key.substring(0, lastIndex);
                    if (entity.hasNode(path)) {
                        property = key.substring(lastIndex + 1, key.length());
                        node = entity.getNode(path);
                    } else {
                        property = key;
                        node = entity;
                    }
                } else {
                    property = key;
                    node = entity;
                }

                final Object value = entry.getValue();
                if (value instanceof String) {
                    if ("null".equals(value)) {
                        node.setProperty(property, (String) null);
                    } else {
                        node.setProperty(property, (String) value);
                    }
                } else if (value instanceof Calendar) {
                    node.setProperty(property, (Calendar) value);
                } else if (value instanceof Boolean) {
                    node.setProperty(property, (Boolean) value);
                } else if (value instanceof Long) {
                    node.setProperty(property, (Long) value);
                } else if (value instanceof Double) {
                    node.setProperty(property, (Double) value);
                } else if (value instanceof BigDecimal) {
                    node.setProperty(property, (BigDecimal) value);
                }
            }
            session.save();
            session.logout();
        } catch (RepositoryException e) {
            e.printStackTrace();
        }
        manager.completeWorkItem(item.getId(), item.getResults());
    }

    @Override
    public void abortWorkItem(final WorkItem item,
                              final WorkItemManager manager) {
        manager.abortWorkItem(item.getId());
    }

}