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.extjs.gxt.ui.client.Style;
import com.extjs.gxt.ui.client.store.ListStore;
import com.extjs.gxt.ui.client.widget.CheckBoxListView;
import com.extjs.gxt.ui.client.widget.Dialog;
import com.extjs.gxt.ui.client.widget.button.Button;
import com.extjs.gxt.ui.client.widget.layout.FitLayout;
import org.activityinfo.i18n.shared.I18N;
import org.activityinfo.legacy.shared.command.DimensionType;
import org.activityinfo.legacy.shared.command.Filter;
import org.activityinfo.legacy.shared.model.AttributeDTO;
import org.activityinfo.legacy.shared.model.AttributeGroupDTO;
import org.activityinfo.ui.client.style.legacy.icon.IconImageBundle;

import java.util.HashSet;
import java.util.Set;

public class AttributeGroupFilterDialog extends Dialog {

    private AttributeGroupDTO group;
    private ListStore<AttributeDTO> store;
    private CheckBoxListView<AttributeDTO> listView;

    private SelectionCallback<Set<Integer>> callback;

    public AttributeGroupFilterDialog(AttributeGroupDTO group) {
        this.group = group;

        initializeComponent();
        createList();
    }

    private void initializeComponent() {
        setHeadingText(I18N.MESSAGES.filterBy(group.getName()));
        setIcon(IconImageBundle.ICONS.filter());
        setWidth(250);
        setHeight(350);
        setLayout(new FitLayout());
        setScrollMode(Style.Scroll.NONE);
    }

    private void createList() {
        store = new ListStore<AttributeDTO>();
        listView = new CheckBoxListView<AttributeDTO>();
        listView.setStore(store);
        listView.setDisplayProperty("name");
        add(listView);
    }

    public Set<Integer> getSelectedIds() {
        Set<Integer> set = new HashSet<Integer>();
        for (AttributeDTO model : listView.getChecked()) {
            set.add(model.getId());
        }
        return set;
    }

    public void show(Filter baseFilter, final Filter currentFilter, SelectionCallback<Set<Integer>> callback) {
        this.callback = callback;
        show();
        Set<Integer> ids = currentFilter.getRestrictions(DimensionType.Attribute);
        store.removeAll();
        store.add(group.getAttributes());
        for (AttributeDTO attr : store.getModels()) {
            if (ids.contains(attr.getId())) {
                listView.setChecked(attr, true);
            }
        }
    }

    @Override
    protected void onButtonPressed(Button button) {
        if (button.getItemId().equals("ok")) {
            callback.onSelected(getSelectedIds());
        }
        callback = null;
        hide();
    }
}