/**
 * MailArchiver is an application that provides services for storing and managing e-mail messages through a Web Services SOAP interface.
 * Copyright (C) 2012  Marcio Andre Scholl Levien and Fernando Alberto Reuter Wendt and Jose Ronaldo Nogueira Fonseca Junior
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/******************************************************************************\
*
*  This product was developed by
*
*        SERVIÇO FEDERAL DE PROCESSAMENTO DE DADOS (SERPRO),
*
*  a government company established under Brazilian law (5.615/70),
*  at Department of Development of Porto Alegre.
*
\******************************************************************************/

package serpro.mailarchiver.view.admin;

import java.io.File;

import org.springframework.beans.factory.annotation.Autowired;

import org.vaadin.easyuploads.MultiFileUpload;
import org.vaadin.easyuploads.UploadField;
import org.vaadin.easyuploads.UploadField.FieldType;

import static com.eventrouter.MessagePublisher.*;

import com.vaadin.data.Property;
import com.vaadin.ui.AbstractSelect;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.ComboBox;
import com.vaadin.ui.Component;
import com.vaadin.ui.Label;

import serpro.mailarchiver.domain.metaarchive.Folder;
import serpro.mailarchiver.service.find.FFolder;
import serpro.mailarchiver.session.Session;
import serpro.mailarchiver.util.transaction.WithReadOnlyTx;
import serpro.mailarchiver.view.BaseComponent;
import serpro.mailarchiver.util.Logger;

class Upload extends BaseComponent.VerticalLayout {

    private static final Logger log = Logger.getLocalLogger();

    Upload() {
        new UploadController(getDisplayId());
    }

    @Override
    public final String getDisplayId() {
        return "upload";
    }

    @Autowired
    private FFolder findFolder;

    private final static int MAX_DEPTH = 20;
    final ComboBox[] comboStack = new ComboBox[MAX_DEPTH];
    private boolean changing;

    @WithReadOnlyTx
    private void refreshComboItems(int depth) {

        Session.setThreadSession(AdminConsoleApp.getInstance().getSession());

        ComboBox cbox = comboStack[depth];
        cbox.removeAllItems();

        String folderId = (depth > 0) ? (String) comboStack[depth-1].getValue() : "home";

        Folder folder = findFolder.byId(folderId);

        for(Folder child : folder.getChildren()) {
            cbox.addItem(child.getOid());
            cbox.setItemCaption(child.getOid(), child.getName());
        }

        cbox.setValue(null);
        cbox.setEnabled(true);
        cbox.setVisible(true);
    }

    @Override
    public Upload init() {

        for(int i = 0; i < MAX_DEPTH; i++) {
            final ComboBox cbox = new ComboBox();
            comboStack[i] = cbox;
            cbox.setWidth("250px");
            cbox.setData(i);
            cbox.setFilteringMode(AbstractSelect.Filtering.FILTERINGMODE_OFF);
            cbox.setImmediate(true);
            cbox.setEnabled(false);
            cbox.setVisible(false);

            cbox.addListener(new Property.ValueChangeListener() {
                @Override
                public void valueChange(Property.ValueChangeEvent valueChangeEvent) {
                    Object o = valueChangeEvent.getProperty().getValue();
                    if(changing) {
                        return;
                    }
                    changing = true;
                    int i = ((Integer)cbox.getData());
                    if(o == null) {
                        for(int j = i + 1; j < MAX_DEPTH; j++) {
                            ComboBox cb = comboStack[j];
                            if(cb.isVisible()) {
                                cb.removeAllItems();
                                cb.setEnabled(false);
                                cb.setVisible(false);
                            }
                        }
                        refreshComboItems(i);
                    }
                    else {
                        for(int j = i + 2; j < MAX_DEPTH; j++) {
                            ComboBox cb = comboStack[j];
                            if(cb.isVisible()) {
                                cb.removeAllItems();
                                cb.setEnabled(false);
                                cb.setVisible(false);
                            }
                        }
                        refreshComboItems(i + 1);
                    }
                    changing = false;
                }
            });

            addComponent(cbox);
        }

        refreshComboItems(0);

        addComponent(hr());

        final UploadField msgUp = new UploadField();
        msgUp.setFieldType(FieldType.BYTE_ARRAY);
        msgUp.setCaption("Selecione uma mensagem para carregar no meta arquivamento");
        Button btnLoad = new Button("Carregar");
        btnLoad.addListener(new Button.ClickListener() {
            @Override
            public void buttonClick(ClickEvent event) {
                publish("/mailarchiver/tests/upload", msgUp.getValue(), getSelectedFolderId());
            }
        });
        addComponent(msgUp);
        addComponent(btnLoad);

        addComponent(hr());

        addComponent(new Label("Teste de multifile upload"));
        final MultiFileUpload multiFileUpload = new MultiFileUpload() {
            @Override
            protected void handleFile(File file, String filename, String mimeType, long length) {
                publish("/mailarchiver/tests/upload", file, filename, getSelectedFolderId());
            }
        };
        multiFileUpload.setCaption("MultiFile Upload");
        addComponent(multiFileUpload);

        return this;
    }

    private String getSelectedFolderId() {
        for(int j = MAX_DEPTH - 1; j >= 0; j--) {
            ComboBox cb = comboStack[j];
            if(cb.isVisible()) {
                Object o = cb.getValue();
                if(o != null) {
                    return (String) o;
                }
            }
        }

        return "home";
    }

    private Component hr() {
        return new Label("<hr>", Label.CONTENT_XHTML);
    }

}