/*
 * Copyright (c) 2017, University of Oslo
 *
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the HISP project nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.hisp.dhis.android.core.period;

import android.os.Build;
import android.support.annotation.RequiresApi;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Locale;

class WeeklyPeriodGenerator {
    private final Calendar calendar;
    private final PeriodType periodType;
    private final int weekStartDay;
    private final String suffix;

    WeeklyPeriodGenerator(Calendar calendar, PeriodType periodType, int weekStartDay, String suffix) {
        this.calendar = (Calendar) calendar.clone();
        this.periodType = periodType;
        this.weekStartDay = weekStartDay;
        this.suffix = suffix;
    }

    List<PeriodModel> generatePeriodsForLastWeeks(int weeks) throws RuntimeException {

        if (weeks < 1) throw new RuntimeException("Number of weeks must be positive.");

        SimpleDateFormat idFormatter = new SimpleDateFormat("yyyy", Locale.US);

        List<PeriodModel> periods = new ArrayList<>();
        calendar.getTime();
        calendar.setFirstDayOfWeek(weekStartDay);
        calendar.setMinimalDaysInFirstWeek(4);
        calendar.add(Calendar.WEEK_OF_YEAR, -weeks + 1);

        for (int i = 0; i < weeks; i++) {
            calendar.set(Calendar.DAY_OF_WEEK, weekStartDay);
            Date startDate = calendar.getTime();
            calendar.set(Calendar.DAY_OF_WEEK, weekStartDay + 6);
            Date endDate = calendar.getTime();
            calendar.set(Calendar.DAY_OF_WEEK, weekStartDay + 3);
            Date fourthWeekDay = calendar.getTime();

            String year = idFormatter.format(fourthWeekDay);
            Integer weekOfYear = calendar.get(Calendar.WEEK_OF_YEAR);

            PeriodModel period = PeriodModel.builder()
                    .periodId(year + suffix + weekOfYear)
                    .periodType(periodType)
                    .startDate(startDate)
                    .endDate(endDate)
                    .build();
            periods.add(period);
            calendar.add(Calendar.WEEK_OF_YEAR, 1);
        }
        return periods;
    }
}

@@ -1594,81 +1594,8 @@
 d;%0A%0A
-import android.os.Build;%0Aimport android.support.annotation.RequiresApi;%0A%0A
 impo

remove unused imports