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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.dialog;

import java.util.prefs.Preferences;

import javax.swing.JCheckBox;
import javax.swing.JOptionPane;

import org.apache.cayenne.modeler.Application;
import org.apache.cayenne.modeler.dialog.pref.GeneralPreferences;

/**
 * Used to confirm deleting items in the model.
 * 
 */
public class ConfirmRemoveDialog {

    private static final String DELETE = "Delete";

    private boolean shouldDelete = true;

    /**
     * If false, no question will be asked no matter what settings are
     */
    private boolean allowAsking;

    public ConfirmRemoveDialog(boolean allowAsking) {
        this.allowAsking = allowAsking;
    }

    private void showDialog(String name) {

        JCheckBox neverPromptAgainBox = new JCheckBox("Always delete without prompt.");

        Object message[] = {
                String.format("Are you sure you would like to delete the %s?", name),
                neverPromptAgainBox
        };

        JOptionPane pane = new JOptionPane(message, JOptionPane.QUESTION_MESSAGE);
        pane.setOptions(new Object[]{ DELETE, "Cancel" });
        pane.setInitialValue(DELETE);
        pane.createDialog(Application.getFrame(), "Confirm Delete").setVisible(true);

        shouldDelete = DELETE.equals(pane.getValue());

        // If the user clicks "cancel" or window close button, we'll just ignore whatever's in the checkbox because
        // it's non-sensical.
        if (shouldDelete) {
            Preferences pref = Application.getInstance().getPreferencesNode(
                    GeneralPreferences.class,
                    "");
            pref.putBoolean(
                    GeneralPreferences.DELETE_PROMPT_PREFERENCE,
                    neverPromptAgainBox.isSelected());
        }
    }

    public boolean shouldDelete(String type, String name) {
        return shouldDelete(String.format("%s named '%s'", type, name));
    }

    public boolean shouldDelete(String name) {
        if (allowAsking) {

            Preferences pref = Application.getInstance().getPreferencesNode(
                    GeneralPreferences.class,
                    "");

            // See if the user has opted not to showDialog the delete dialog.
            if ((pref == null)
                    || !pref.getBoolean(
                            GeneralPreferences.DELETE_PROMPT_PREFERENCE,
                            false)) {
                showDialog(name);
            }
        }

        return shouldDelete;
    }
}