package org.activityinfo.ui.client.component.report.editor.map.layerOptions;

/*
 * #%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.event.MenuEvent;
import com.extjs.gxt.ui.client.event.SelectionListener;
import com.extjs.gxt.ui.client.util.DateWrapper;
import com.extjs.gxt.ui.client.widget.menu.Menu;
import com.extjs.gxt.ui.client.widget.menu.MenuItem;
import com.extjs.gxt.ui.client.widget.menu.SeparatorMenuItem;
import org.activityinfo.i18n.shared.I18N;
import org.activityinfo.legacy.shared.reports.model.DateRange;
import org.activityinfo.ui.client.component.filter.SelectionCallback;
import org.activityinfo.ui.client.style.legacy.icon.IconImageBundle;

public class DateFilterMenu extends Menu {

    private SelectionCallback<DateRange> callback;
    private DateRangeDialog dialog;

    public DateFilterMenu() {

        addLastFourQuarters();
        add(new SeparatorMenuItem());

        addYearRange(0);
        addYearRange(1);
        add(new SeparatorMenuItem());

        add(new MenuItem(I18N.CONSTANTS.customDateRange(), new SelectionListener<MenuEvent>() {
            @Override
            public void componentSelected(MenuEvent ce) {
                showDateRangeDialog();
            }
        }));
        add(new SeparatorMenuItem());

        addRemoveDateFilter();
    }

    private void addRemoveDateFilter() {
        add(new MenuItem(I18N.CONSTANTS.remove(), IconImageBundle.ICONS.delete(), new SelectionListener<MenuEvent>() {
            @Override
            public void componentSelected(MenuEvent ce) {
                if (callback != null) {
                    callback.onSelected(null);
                }
            }
        }));
    }

    public void showAt(int x, int y, SelectionCallback<DateRange> callback) {
        this.callback = callback;
        showAt(x, y);
    }

    private void addYearRange(int yearsAgo) {
        int year = new DateWrapper().getFullYear() - yearsAgo;
        DateWrapper from = new DateWrapper(year, 0, 1);
        DateWrapper to = new DateWrapper(year, 11, 31);

        addFixedRange(Integer.toString(year), new DateRange(from.asDate(), to.asDate()));
    }

    private void addLastFourQuarters() {
        DateWrapper today = new DateWrapper();
        int year = today.getFullYear();
        int quarter = today.getMonth() / 3;

        for (int i = 0; i < 4; ++i) {
            quarter = quarter - 1;
            if (quarter < 0) {
                year = year - 1;
                quarter = 3;
            }
            addQuarterRange(year, quarter);
        }

    }

    private void addQuarterRange(int year, int quarter) {
        DateWrapper from = new DateWrapper(year, quarter * 3, 1);
        DateWrapper to = from.addMonths(3).addDays(-1);

        addFixedRange(I18N.MESSAGES.quarter(year, (quarter + 1)), new DateRange(from.asDate(), to.asDate()));
    }

    private void addFixedRange(String label, final DateRange dateRange) {
        add(new MenuItem(label, new SelectionListener<MenuEvent>() {

            @Override
            public void componentSelected(MenuEvent ce) {
                if (callback != null) {
                    callback.onSelected(dateRange);
                }
            }
        }));
    }

    protected void showDateRangeDialog() {
        if (dialog == null) {
            dialog = new DateRangeDialog();
        }
        dialog.show(callback);
    }

}