/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
 * Software engineering by Intevation GmbH
 *
 * This file is Free Software under the GNU AGPL (>=v3)
 * and comes with ABSOLUTELY NO WARRANTY! Check out the
 * documentation coming with Dive4Elements River for details.
 */

package org.dive4elements.river.client.client.ui.bundu;

import java.util.ArrayList;
import java.util.List;

import org.dive4elements.river.client.client.ui.AbstractUIProvider;
import org.dive4elements.river.client.client.ui.PanelHelper;
import org.dive4elements.river.client.client.ui.StringArrayParseHelper;
import org.dive4elements.river.client.client.ui.ValidationHelper;
import org.dive4elements.river.client.shared.model.Data;
import org.dive4elements.river.client.shared.model.DataItem;
import org.dive4elements.river.client.shared.model.DataList;
import org.dive4elements.river.client.shared.model.DefaultData;
import org.dive4elements.river.client.shared.model.DefaultDataItem;

import com.smartgwt.client.widgets.Canvas;
import com.smartgwt.client.widgets.Label;
import com.smartgwt.client.widgets.form.DynamicForm;
import com.smartgwt.client.widgets.form.fields.StaticTextItem;
import com.smartgwt.client.widgets.form.fields.TextItem;
import com.smartgwt.client.widgets.layout.HLayout;
import com.smartgwt.client.widgets.layout.VLayout;

public class QSeriesLengthPanel extends AbstractUIProvider {
    private static final long serialVersionUID = 1L;

    private TextItem inputItem;

    protected String getDatakey() {
        return "year_input_q_series";
    }

    private Canvas createWidget(final DataList data) {
        final VLayout layout = new VLayout();

        final Label title = new Label(data.get(0).getDescription());
        title.setHeight("35px");

        final DynamicForm form = new DynamicForm();

        form.setNumCols(4);
        this.inputItem = PanelHelper.createItem("NAME_TO_PREVENT_ERROR_MSG");
        this.inputItem.setValue(40);
        this.inputItem.setShowTitle(false);
        this.inputItem.setWidth(100);
        final StaticTextItem textItem = new StaticTextItem("IRRELEVANT_NAME");

        textItem.setValue("[a]"); // internationalisieren?
        textItem.setShowTitle(false);
        form.setFields(this.inputItem);

        form.setFields(this.inputItem, textItem);

        layout.addMember(title);
        layout.addMember(form);
        return layout;
    }

    @Override
    protected final Data[] getData() { // THIS is a Copy from abstractSingleItemPanel :-(
        final List<String> errors = this.validate(); // do not allow advance state
        if (errors.size() > 0) {
            showErrors(errors);
        }
        if (this.inputItem != null && !this.inputItem.getValueAsString().isEmpty()) {
            final List<Data> data = new ArrayList<Data>();

            final DataItem yearsdata = new DefaultDataItem(getDatakey(), getDatakey(), StringArrayParseHelper.trimRawString(this.inputItem.getValueAsString()));
            data.add(new DefaultData(getDatakey(), null, null, new DataItem[] { yearsdata }));

            return data.toArray(new Data[data.size()]);
        }
        return new Data[0];
    }

    @Override
    public Canvas createOld(final DataList dataList) {
        final List<Data> items = dataList.getAll();
        final Data years = getData(items, getDatakey());
        final DataItem[] yearsItems = years.getItems();

        final StringBuilder builder = new StringBuilder();
        final int year = Integer.valueOf(yearsItems[0].getStringValue());
        builder.append(year).append(" ");

        if (year > 1) {
            builder.append(this.MSG.years_general());
        } else {
            builder.append(this.MSG.year());
        }

        final Label old = new Label(builder.toString());
        final HLayout layout = new HLayout();
        layout.setWidth("400px");

        final Label label = new Label(dataList.getLabel());
        label.setWidth("200px");

        final Canvas back = getBackButton(dataList.getState());

        layout.addMember(label);
        layout.addMember(old);
        layout.addMember(back);

        return layout;
    }

    @Override
    public Canvas create(final DataList data) {
        final VLayout layout = new VLayout();

        final Canvas submit = getNextButton();
        final Canvas widget = createWidget(data);

        layout.addMember(widget);
        layout.addMember(submit);

        return layout;
    }

    @Override
    public List<String> validate() {
        final List<String> errors = new ArrayList<String>();
        errors.addAll(ValidationHelper.checkForEmpty(this.inputItem, this.MSG));
        try {
            final int value = Integer.valueOf(this.inputItem.getValueAsString());
            if (value <= 0) {
                errors.add(this.MSG.error_invalid_integer_positive_required());
            }
        }
        catch (final NumberFormatException e) {
            errors.add(this.MSG.error_invalid_integer());
        }
        return errors;

    }

}