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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.
 ****************************************************************/

package org.apache.cayenne.modeler.editor;

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import javax.swing.DefaultComboBoxModel;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;

import org.apache.cayenne.configuration.DataChannelDescriptor;
import org.apache.cayenne.map.DataMap;
import org.apache.cayenne.map.EntityResolver;
import org.apache.cayenne.map.ObjEntity;
import org.apache.cayenne.modeler.Application;
import org.apache.cayenne.modeler.ProjectController;
import org.apache.cayenne.modeler.util.CellRenderers;
import org.apache.cayenne.modeler.util.Comparators;
import org.apache.cayenne.query.Query;

import com.jgoodies.forms.builder.PanelBuilder;
import com.jgoodies.forms.layout.CellConstraints;
import com.jgoodies.forms.layout.FormLayout;

/**
 * A panel that supports editing the properties a query not based on ObjEntity, but still
 * supporting DataObjects retrieval.
 * 
 */
public abstract class RawQueryPropertiesPanel extends SelectPropertiesPanel {

    protected JCheckBox dataObjects;
    protected JComboBox entities;

    public RawQueryPropertiesPanel(ProjectController mediator) {
        super(mediator);
    }

    protected void initController() {
        super.initController();
        dataObjects.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent event) {
                setFetchingDataObjects(dataObjects.isSelected());
            }
        });

        entities.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent event) {
                ObjEntity entity = (ObjEntity) entities.getModel().getSelectedItem();
                setEntity(entity);
            }
        });
    }

    protected PanelBuilder createPanelBuilder() {
        CellConstraints cc = new CellConstraints();
        FormLayout layout = new FormLayout(
                "right:max(80dlu;pref), 3dlu, left:max(10dlu;pref), "
                        + "3dlu, left:max(37dlu;pref), 3dlu, fill:max(147dlu;pref)",
                "p, 3dlu, p, 3dlu, p, 3dlu, p, 3dlu, p, 3dlu, p, 3dlu, p, 3dlu, p");

        PanelBuilder builder = new PanelBuilder(layout);
        builder.setDefaultDialogBorder();

        builder.addSeparator("Select Properties", cc.xywh(1, 1, 7, 1));

        builder.addLabel("Result Caching:", cc.xy(1, 3));
        builder.add(cacheStrategy, cc.xywh(3, 3, 5, 1));
        cacheGroupsLabel = builder.addLabel("Cache Groups:", cc.xy(1, 7));
        builder.add(cacheGroups.getComponent(), cc.xywh(3, 7, 5, 1));
        builder.addLabel("Fetch Data Objects:", cc.xy(1, 9));
        builder.add(dataObjects, cc.xy(3, 9));
        builder.add(entities, cc.xywh(5, 9, 3, 1));
        builder.addLabel("Fetch Offset, Rows:", cc.xy(1, 11));
        builder.add(fetchOffset.getComponent(), cc.xywh(3, 11, 3, 1));
        builder.addLabel("Fetch Limit, Rows:", cc.xy(1, 13));
        builder.add(fetchLimit.getComponent(), cc.xywh(3, 13, 3, 1));
        builder.addLabel("Page Size:", cc.xy(1, 15));
        builder.add(pageSize.getComponent(), cc.xywh(3, 15, 3, 1));
        return builder;
    }

    protected void initView() {
        super.initView();

        // create widgets

        dataObjects = new JCheckBox();

        entities = Application.getWidgetFactory().createUndoableComboBox();
        entities.setRenderer(CellRenderers.listRendererWithIcons());

        this.setLayout(new BorderLayout());
        this.add(createPanelBuilder().getPanel(), BorderLayout.CENTER);
    }

    /**
     * Updates the view from the current model state. Invoked when a currently displayed
     * query is changed.
     */
    public void initFromModel(Query query) {
        super.initFromModel(query);
        EntityResolver entRes = new EntityResolver(((DataChannelDescriptor) mediator
                .getProject()
                .getRootNode()).getDataMaps());
        boolean fetchingDO = !query.getMetaData(entRes).isFetchingDataRows();
        dataObjects.setSelected(fetchingDO);

        // TODO: now we only allow ObjEntities from the current map,
        // since query root is fully resolved during map loading,
        // making it impossible to reference other DataMaps.

        DataMap map = mediator.getCurrentDataMap();
        List objEntities = new ArrayList();
        objEntities.addAll(map.getObjEntities());

        if (objEntities.size() > 1) {
            Collections.sort(objEntities, Comparators.getDataMapChildrenComparator());
        }

        entities.setEnabled(fetchingDO && isEnabled());
        DefaultComboBoxModel model = new DefaultComboBoxModel(objEntities.toArray());
        model.setSelectedItem(getEntity(query));
        entities.setModel(model);
    }

    protected abstract void setEntity(ObjEntity selectedEntity);

    protected abstract ObjEntity getEntity(Query query);

    protected void setFetchingDataObjects(boolean dataObjects) {
        entities.setEnabled(dataObjects && isEnabled());

        if (!dataObjects) {
            entities.getModel().setSelectedItem(null);
        }

        setQueryProperty("fetchingDataRows", dataObjects ? Boolean.FALSE : Boolean.TRUE);
    }
}