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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
 *
 *    https://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.action;

import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.io.File;
import java.util.prefs.Preferences;

import javax.swing.JOptionPane;
import javax.swing.KeyStroke;

import org.apache.cayenne.CayenneRuntimeException;
import org.apache.cayenne.configuration.ConfigurationNode;
import org.apache.cayenne.modeler.Application;
import org.apache.cayenne.modeler.dialog.validator.ValidatorDialog;
import org.apache.cayenne.modeler.event.ProjectOnSaveEvent;
import org.apache.cayenne.modeler.util.CayenneAction;
import org.apache.cayenne.pref.RenamedPreferences;
import org.apache.cayenne.project.Project;
import org.apache.cayenne.project.ProjectSaver;
import org.apache.cayenne.project.validation.ProjectValidator;
import org.apache.cayenne.resource.URLResource;
import org.apache.cayenne.validation.ValidationResult;

/**
 * A "Save As" action that allows user to pick save location.
 * 
 */
public class SaveAsAction extends CayenneAction {

    private ProjectOpener fileChooser;

    public static String getActionName() {
        return "Save As...";
    }

    public SaveAsAction(Application application) {
        this(getActionName(), application);
    }

    protected SaveAsAction(String name, Application application) {
        super(name, application);
        this.fileChooser = new ProjectOpener();
    }

    @Override
    public KeyStroke getAcceleratorKey() {
        return KeyStroke.getKeyStroke(KeyEvent.VK_S,
                Toolkit.getDefaultToolkit().getMenuShortcutKeyMask() | InputEvent.SHIFT_MASK);
    }

    /**
     * Saves project and related files. Saving is done to temporary files, and
     * only on successful save, master files are replaced with new versions.
     */
    protected boolean saveAll() throws Exception {
        Project p = getCurrentProject();

        String oldPath = null;
        if (p.getConfigurationResource() != null) {
            oldPath = p.getConfigurationResource().getURL().getPath();
        }

        File projectDir = fileChooser.newProjectDir(Application.getFrame(), p);
        if (projectDir == null) {
            return false;
        }

        if (projectDir.exists() && !projectDir.canWrite()) {
            JOptionPane.showMessageDialog(Application.getFrame(), "Can't save project - unable to write to file \""
                    + projectDir.getPath() + "\"", "Can't Save Project", JOptionPane.ERROR_MESSAGE);
            return false;
        }

        getProjectController().getFileChangeTracker().pauseWatching();

        URLResource res = new URLResource(projectDir.toURI().toURL());

        ProjectSaver saver = getApplication().getInjector().getInstance(ProjectSaver.class);

        boolean isNewProject = p.getConfigurationResource() == null;
        Preferences tempOldPref = null;
        if (isNewProject) {
            tempOldPref = getApplication().getMainPreferenceForProject();
        }

        saver.saveAs(p, res);

        if (oldPath != null && oldPath.length() != 0
                && !oldPath.equals(p.getConfigurationResource().getURL().getPath())) {

            String newName = p.getConfigurationResource().getURL().getPath().replace(".xml", "");
            String oldName = oldPath.replace(".xml", "");

            Preferences oldPref = getProjectController().getPreferenceForProject();
            String projPath = oldPref.absolutePath().replace(oldName, "");
            Preferences newPref = getProjectController().getPreferenceForProject().node(projPath + newName);
            RenamedPreferences.copyPreferences(newPref, getProjectController().getPreferenceForProject(), false);
        } else if (isNewProject) {
            if (tempOldPref != null) {

                String newProjectName = getApplication().getNewProjectTemporaryName();

                if (tempOldPref.absolutePath().contains(newProjectName)) {

                    String projPath = tempOldPref.absolutePath().replace("/" + newProjectName, "");
                    String newName = p.getConfigurationResource().getURL().getPath().replace(".xml", "");

                    Preferences newPref = getApplication().getMainPreferenceForProject().node(projPath + newName);

                    RenamedPreferences.copyPreferences(newPref, tempOldPref, false);
                    tempOldPref.removeNode();
                    Application.getInstance().getFrameController().getLastDirectory().setDirectory(projectDir);
                }
            }
        }

        RenamedPreferences.removeNewPreferences();

        File file = new File(p.getConfigurationResource().getURL().toURI());
        getApplication().getFrameController().addToLastProjListAction(file);
        Application.getFrame().fireRecentFileListChanged();

        // Reset the watcher now
        getProjectController().getFileChangeTracker().reconfigure();

        return true;
    }

    /**
     * This method is synchronized to prevent problems on double-clicking
     * "save".
     */
    @Override
    public void performAction(ActionEvent e) {
        performAction();
    }

    public void performAction() {

        ProjectValidator projectValidator = getApplication().getInjector().getInstance(ProjectValidator.class);
        ValidationResult validationResult = projectValidator.validate(getCurrentProject().getRootNode());
        
        getProjectController().fireProjectOnSaveEvent(new ProjectOnSaveEvent(SaveAsAction.class));
        
        try {
            if (!saveAll()) {
                return;
            }
        } catch (Exception ex) {
            throw new CayenneRuntimeException("Error on save", ex);
        }

        getApplication().getFrameController().projectSavedAction();

        // If there were errors or warnings at validation, display them
        if (validationResult.getFailures().size() > 0) {
            ValidatorDialog.showDialog(Application.getFrame(), validationResult.getFailures());
        }
    }

    /**
     * Returns true if path contains a Project object and the
     * project is modified.
     */
    @Override
    public boolean enableForPath(ConfigurationNode object) {
        if (object == null) {
            return false;
        }

        Project project = getApplication().getProject();
        return project != null && project.isModified();
    }
}