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 *   Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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.
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package org.apache.cayenne.modeler.util.state;

import org.apache.cayenne.configuration.DataChannelDescriptor;
import org.apache.cayenne.configuration.DataNodeDescriptor;
import org.apache.cayenne.map.Attribute;
import org.apache.cayenne.map.DataMap;
import org.apache.cayenne.map.DbEntity;
import org.apache.cayenne.map.Entity;
import org.apache.cayenne.map.ObjEntity;
import org.apache.cayenne.modeler.ProjectController;
import org.apache.cayenne.modeler.event.AttributeDisplayEvent;
import org.apache.cayenne.modeler.event.EntityDisplayEvent;

import java.util.ArrayList;
import java.util.List;

class AttributeDisplayEventType extends EntityDisplayEventType {

    AttributeDisplayEventType(ProjectController controller) {
        super(controller);
    }

    @Override
    public void fireLastDisplayEvent() {
        DataChannelDescriptor dataChannel = (DataChannelDescriptor) controller.getProject().getRootNode();
        if (!dataChannel.getName().equals(preferences.getDomain())) {
            return;
        }

        DataNodeDescriptor dataNode = dataChannel.getNodeDescriptor(preferences.getNode());
        DataMap dataMap = dataChannel.getDataMap(preferences.getDataMap());
        if (dataMap == null) {
            return;
        }

        Entity entity = getLastEntity(dataMap);
        if (entity == null) {
            return;
        }

        Attribute[] attributes = getLastEntityAttributes(entity);

        EntityDisplayEvent entityDisplayEvent = new EntityDisplayEvent(this, entity, dataMap, dataNode, dataChannel);
        AttributeDisplayEvent attributeDisplayEvent = new AttributeDisplayEvent(this, attributes, entity, dataMap, dataChannel);

        if (entity instanceof ObjEntity) {
            controller.fireObjEntityDisplayEvent(entityDisplayEvent);
            controller.fireObjAttributeDisplayEvent(attributeDisplayEvent);
        } else if (entity instanceof DbEntity) {
            controller.fireDbEntityDisplayEvent(entityDisplayEvent);
            controller.fireDbAttributeDisplayEvent(attributeDisplayEvent);
        }
    }

    @Override
    public void saveLastDisplayEvent() {
        preferences.setEvent(AttributeDisplayEvent.class.getSimpleName());
        preferences.setDomain(controller.getCurrentDataChanel().getName());
        preferences.setNode(controller.getCurrentDataNode() != null ? controller.getCurrentDataNode().getName() : "");
        preferences.setDataMap(controller.getCurrentDataMap().getName());

        if (controller.getCurrentObjEntity() != null) {
            preferences.setObjEntity(controller.getCurrentObjEntity().getName());
            preferences.setObjAttrs(parseToString(controller.getCurrentObjAttributes()));
            preferences.setDbEntity(null);
        } else if (controller.getCurrentDbEntity() != null) {
            preferences.setDbEntity(controller.getCurrentDbEntity().getName());
            preferences.setDbAttrs(parseToString(controller.getCurrentDbAttributes()));
            preferences.setObjEntity(null);
        }
    }

    protected Attribute[] getLastEntityAttributes(Entity entity) {
        List<Attribute> attributeList = new ArrayList<>();

        String attrs = (entity instanceof ObjEntity) ? preferences.getObjAttrs() : preferences.getDbAttrs();
        for (String attrName : attrs.split(",")) {
            Attribute attr = entity.getAttribute(attrName);
            if(attr != null) {
                attributeList.add(attr);
            }
        }

        return attributeList.toArray(new Attribute[0]);
    }

}