/*
 * This file is part of LibrePlan
 *
 * Copyright (C) 2009-2010 Fundación para o Fomento da Calidade Industrial e
 *                         Desenvolvemento Tecnolóxico de Galicia
 * Copyright (C) 2010-2011 Igalia, S.L.
 *
 * 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/>.
 */

package org.libreplan.web.reports;

import net.sf.jasperreports.engine.JRDataSource;
import org.zkoss.util.Locales;
import org.zkoss.zk.ui.Component;
import org.zkoss.zkplus.spring.SpringUtil;
import org.zkoss.zul.Listbox;
import org.zkoss.zul.Listitem;

import java.text.DateFormatSymbols;
import java.util.Calendar;
import java.util.Map;

/**
 * @author Diego Pino Garcia <dpino@igalia.com>
 */
public class HoursWorkedPerWorkerInAMonthController extends LibrePlanReportController {

    private static final String REPORT_NAME = "hoursWorkedPerWorkerInAMonthReport";

    private IHoursWorkedPerWorkerInAMonthModel hoursWorkedPerWorkerInAMonthModel;

    private Listbox lbYears;

    private Listbox lbMonths;

    public HoursWorkedPerWorkerInAMonthController(){
        hoursWorkedPerWorkerInAMonthModel =
                (IHoursWorkedPerWorkerInAMonthModel) SpringUtil.getBean("hoursWorkedPerWorkerInAMonthModel");
    }

    @Override
    public void doAfterCompose(Component comp) throws Exception {
        super.doAfterCompose(comp);
        comp.setAttribute("controller", this, true);
        hoursWorkedPerWorkerInAMonthModel.init();
        initYears();
        initMonths();
    }

    private void initMonths() {
        String months[] = DateFormatSymbols.getInstance(Locales.getCurrent()).getMonths();
        // Using 12 instead of months.length because of the array has 13 positions.
        // The reason to return 13 positions is because of some lunar calendars would have 13 months instead of 12.
        for (int i = 0; i < 12; i++) {
            Listitem month = new Listitem();
            month.setLabel(months[i]);
            month.setValue("" + (i + 1));
            if (Calendar.getInstance().get(Calendar.MONTH) == i)
                month.setSelected(true);
            else
                month.setSelected(false);
            lbMonths.appendChild(month);
        }
    }

    private void initYears() {
        int beginYear = hoursWorkedPerWorkerInAMonthModel.getBeginDisplayYears();
        int endYear = hoursWorkedPerWorkerInAMonthModel.getEndDisplayYears();
        if (beginYear != 0 && endYear != 0) {
            for (int i = beginYear; i <= endYear; i++) {
                Listitem year = new Listitem();
                year.setLabel("" + i);
                year.setValue("" + i);
                if (Calendar.getInstance().get(Calendar.YEAR) == i)
                    year.setSelected(true);
                else
                    year.setSelected(false);
                lbYears.appendChild(year);
            }
        } else {
            int year = Calendar.getInstance().get(Calendar.YEAR);
            Listitem itemYear = new Listitem();
            itemYear.setLabel("" + year);
            itemYear.setValue("" + year);
            lbYears.appendChild(itemYear);
        }
    }

    @Override
    protected String getReportName() {
        return REPORT_NAME;
    }

    private String getSelectedMonth() {
        return getSelectedValue(lbMonths);
    }

    private String getSelectedValue(Listbox listbox) {
        Listitem item = listbox.getSelectedItem();

        return (item != null) ? (String) item.getValue() : getFirst(listbox);
    }

    private String getFirst(Listbox listbox) {
        final Listitem item = listbox.getItems().iterator().next();
        return (String) item.getValue();
    }

    private String getSelectedYear() {
        return getSelectedValue(lbYears);
    }

    @Override
    protected JRDataSource getDataSource() {
        return hoursWorkedPerWorkerInAMonthModel.getHoursWorkedPerWorkerReport(
                asInt(getSelectedYear()), asInt(getSelectedMonth()));
    }

    private Integer asInt(String str) {
        return Integer.parseInt(str);
    }

    @Override
    protected Map<String, Object> getParameters() {
        Map<String, Object> result = super.getParameters();

        result.put("year", getSelectedYear());
        result.put("month", monthAsLiteral(getSelectedMonth()));
        result.put("showNote", hoursWorkedPerWorkerInAMonthModel.isShowReportMessage());

        return result;
    }

    private String monthAsLiteral(String monthNumber) {
        Integer number = Integer.parseInt(monthNumber);
        String months[] = DateFormatSymbols.getInstance(Locales.getCurrent()).getMonths();

        return months[number - 1];
    }

}