/*
 * Copyright 2011 JBoss Inc 
 *
 * Licensed 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.jbpm.formbuilder.client.command;

import org.jbpm.formapi.client.CommonGlobals;
import org.jbpm.formapi.client.FormBuilderException;
import org.jbpm.formapi.client.bus.ui.NotificationEvent;
import org.jbpm.formapi.client.bus.ui.NotificationEvent.Level;
import org.jbpm.formapi.shared.api.FormRepresentation;
import org.jbpm.formbuilder.client.FormBuilderGlobals;
import org.jbpm.formbuilder.client.FormBuilderService;
import org.jbpm.formbuilder.client.bus.GetFormRepresentationEvent;
import org.jbpm.formbuilder.client.bus.GetFormRepresentationResponseEvent;
import org.jbpm.formbuilder.client.bus.GetFormRepresentationResponseHandler;
import org.jbpm.formbuilder.client.messages.I18NConstants;

import com.google.gwt.event.shared.EventBus;
import com.google.gwt.user.client.ui.MenuItem;

public class ExportFormCommand implements BaseCommand {

    private final I18NConstants i18n = FormBuilderGlobals.getInstance().getI18n();
    protected final EventBus bus = CommonGlobals.getInstance().getEventBus();
    private final FormBuilderService server = FormBuilderGlobals.getInstance().getService();
    private final String saveType = getClass().getName();
    private final String language;
    
    public ExportFormCommand(String language) {
        this.language = language;
        this.bus.addHandler(GetFormRepresentationResponseEvent.TYPE, new GetFormRepresentationResponseHandler() {
            @Override
            public void onEvent(GetFormRepresentationResponseEvent event) {
                FormRepresentation form = event.getRepresentation();
                String type = event.getSaveType();
                if (saveType.equals(type)) {
                    getTemplate(form);
                }
            }
        });
    }
    
    private void getTemplate(FormRepresentation form) {
        try {
            server.loadFormTemplate(form, language);
        } catch (FormBuilderException e) {
            bus.fireEvent(new NotificationEvent(Level.ERROR, i18n.UnexpectedWhileExportForm(this.saveType), e));
        }
    }
    
    @Override
    public void execute() {
        this.bus.fireEvent(new GetFormRepresentationEvent(this.saveType));
    }

    @Override
    public void setItem(MenuItem item) {
        /* do nothing */
    }

    @Override
    public void setEmbeded(String profile) {
        //shouldn't be disabled when embedded
    }
}