/*******************************************************************************
 * Copyright (c) 2014 Elphel, Inc.
 * Copyright (c) 2006 Elphel, Inc and Excelsior, LLC.
 * This file is a part of VDT plug-in.
 * VDT plug-in is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * VDT plug-in is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 *  Additional permission under GNU GPL version 3 section 7:
 * If you modify this Program, or any covered work, by linking or combining it
 * with Eclipse or Eclipse plugins (or a modified version of those libraries),
 * containing parts covered by the terms of EPL/CPL, the licensors of this
 * Program grant you additional permission to convey the resulting work.
 * {Corresponding Source for a non-source form of such a combination shall
 * include the source code for the parts of Eclipse or Eclipse plugins used
 * as well as that of the covered work.}
 *******************************************************************************/
package com.elphel.vdt.ui.tools.params;


import java.io.File;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.debug.core.ILaunchConfiguration;
import org.eclipse.debug.core.ILaunchConfigurationWorkingCopy;
import org.eclipse.swt.widgets.Composite;

import com.elphel.vdt.Txt;
import com.elphel.vdt.core.tools.params.Parameter;
import com.elphel.vdt.ui.MessageUI;
import com.elphel.vdt.ui.options.component.BrowseableField;
import com.elphel.vdt.ui.options.component.FileComponent;
import com.elphel.vdt.ui.tools.LaunchConfigurationTab;

public class FileTabComponent extends AbstractTabComponent {

    public FileTabComponent( LaunchConfigurationTab tab
                           , Parameter toolParameter ) 
    {
        super(tab, new FileComponent(toolParameter));
    }

    public void createControl(Composite parent) {
        super.createControl(parent);
        WidgetListener listener = new WidgetListener();
        getLocationField().addSelectionListener(listener);
        getLocationField().addModifyListener(listener);
    }
    
    private BrowseableField getLocationField() {
        return ((FileComponent)component).getLocationField();
    }

    public void initializeFrom(ILaunchConfiguration configuration) {
        String location= "";
        try {
            location = configuration.getAttribute(ATTR_NAME_VALUE, "");
        } catch (CoreException ce) {
            MessageUI.showErrorMessage(ce, Txt.s("LaunchTab.Error.ReadConfiguration"));
        }
        getLocationField().getBrowsedNameField().setText(location);
    }

    public void performApply(ILaunchConfigurationWorkingCopy configuration) {
        String location = getLocationField().getBrowsedNameField().getText().trim();
        setAttributes(configuration, location);
    }

    public boolean isValid(boolean newConfig) {
        String location = getLocationField().getBrowsedNameField().getText().trim();
        if (location.length() < 1) {
            if (newConfig) {
                tab.setErrorMessage(null);
                tab.setMessage(Txt.s("LaunchTab.File.Message.Info", component.getParam().getLabel()));
            } else {
                tab.setErrorMessage(Txt.s("LaunchTab.Location.Error.CannotBeEmpty", component.getParam().getLabel()));
                tab.setMessage(null);
            }
            return false;
        }
        
        File file = new File(location);
        if (!file.exists()) { // The file does not exist.
            if (!newConfig) {
                tab.setErrorMessage(Txt.s("LaunchTab.Location.Error.DoesNotExist", component.getParam().getLabel()));
            }
            return false;
        }
        if (!file.isFile()) {
            if (!newConfig) {
                tab.setErrorMessage(Txt.s("LaunchTab.Location.Message.IsNotFile", component.getParam().getLabel()));
            }
            return false;
        }
        return true;
    } // isValid()
    
} //class FileTabComponent