package org.activityinfo.ui.client.component.filter;

/*
 * #%L
 * ActivityInfo Server
 * %%
 * Copyright (C) 2009 - 2013 UNICEF
 * %%
 * This program 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.
 * 
 * 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 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/gpl-3.0.html>.
 * #L%
 */

import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.SpanElement;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.ui.Widget;
import org.activityinfo.legacy.shared.command.Filter;

public abstract class FilterWidget extends Widget implements FilterPanel {

    private static FilterWidgetUiBinder uiBinder = GWT.create(FilterWidgetUiBinder.class);

    interface FilterWidgetUiBinder extends UiBinder<Element, FilterWidget> {
    }

    @UiField
    protected SpanElement dimensionSpan;
    @UiField
    protected SpanElement stateSpan;
    // @UiField Element removeIcon;

    private Filter value = new Filter();
    private Filter baseFilter = new Filter();

    public FilterWidget() {
        setElement(uiBinder.createAndBindUi(this));
        sinkEvents(Event.ONCLICK);
    }

    @Override
    public final void onBrowserEvent(Event event) {
        if (event.getTypeInt() == Event.ONCLICK) {
            choose(event);
        }
    }

    protected final void setState(String html) {
        stateSpan.setInnerHTML(html);
    }

    protected abstract void choose(Event event);

    @Override
    public final Filter getValue() {
        return value;
    }

    @Override
    public final void setValue(Filter value) {
        setValue(value, true);
    }

    @Override
    public final void setValue(Filter value, boolean fireEvents) {
        if (value == null) {
            value = new Filter();
        }
        this.value = value;
        if (fireEvents) {
            ValueChangeEvent.fire(this, this.value);
        }
        updateView();
    }

    protected void updateView() {

    }

    @Override
    public final HandlerRegistration addValueChangeHandler(ValueChangeHandler<Filter> handler) {
        return addHandler(handler, ValueChangeEvent.getType());
    }

    @Override
    public void applyBaseFilter(Filter filter) {
        this.baseFilter = filter;
    }

    protected void setBaseFilter(Filter baseFilter) {
        this.baseFilter = baseFilter;
    }

    protected Filter getBaseFilter() {
        return baseFilter;
    }

    @Override
    public String toString() {
        return dimensionSpan.getInnerText() + ": " + stateSpan.getInnerText();
    }
}