/**
 *    Copyright (C) 2021-present MongoDB, Inc.
 *
 *    This program is free software: you can redistribute it and/or modify
 *    it under the terms of the Server Side Public License, version 1,
 *    as published by MongoDB, Inc.
 *
 *    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
 *    Server Side Public License for more details.
 *
 *    You should have received a copy of the Server Side Public License
 *    along with this program. If not, see
 *    <http://www.mongodb.com/licensing/server-side-public-license>.
 *
 *    As a special exception, the copyright holders give permission to link the
 *    code of portions of this program with the OpenSSL library under certain
 *    conditions as described in each individual source file and distribute
 *    linked combinations including the program with the OpenSSL library. You
 *    must comply with the Server Side Public License in all respects for
 *    all of the code used other than as permitted herein. If you modify file(s)
 *    with this exception, you may extend this exception to your version of the
 *    file(s), but you are not obligated to do so. If you do not wish to do so,
 *    delete this exception statement from your version. If you delete this
 *    exception statement from all source files in the program, then also delete
 *    it in the license file.
 */

#include "mongo/platform/basic.h"

#include "mongo/db/timeseries/timeseries_options.h"
#include "mongo/unittest/unittest.h"
#include "mongo/util/time_support.h"


namespace mongo {

auto createTimeseriesOptionsWithGranularity(BucketGranularityEnum granularity) {
    auto options = TimeseriesOptions{};
    options.setGranularity(granularity);
    return options;
}

TEST(TimeseriesOptionsTest, RoundTimestampToGranularity) {
    TimeseriesOptions optionsSeconds =
        createTimeseriesOptionsWithGranularity(BucketGranularityEnum::Seconds);
    TimeseriesOptions optionsMinutes =
        createTimeseriesOptionsWithGranularity(BucketGranularityEnum::Minutes);
    TimeseriesOptions optionsHours =
        createTimeseriesOptionsWithGranularity(BucketGranularityEnum::Hours);
    std::vector<std::tuple<TimeseriesOptions, std::string, std::string>> testCases{
        {optionsSeconds, "2021-01-01T00:00:15.555Z", "2021-01-01T00:00:00.000Z"},
        {optionsSeconds, "2021-01-01T00:00:30.555Z", "2021-01-01T00:00:00.000Z"},
        {optionsSeconds, "2021-01-01T00:00:45.555Z", "2021-01-01T00:00:00.000Z"},

        {optionsMinutes, "2021-01-01T00:15:00.000Z", "2021-01-01T00:00:00.000Z"},
        {optionsMinutes, "2021-01-01T00:30:00.000Z", "2021-01-01T00:00:00.000Z"},
        {optionsMinutes, "2021-01-01T00:45:00.000Z", "2021-01-01T00:00:00.000Z"},

        {optionsHours, "2021-01-01T06:00:00.000Z", "2021-01-01T00:00:00.000Z"},
        {optionsHours, "2021-01-01T12:00:00.000Z", "2021-01-01T00:00:00.000Z"},
        {optionsHours, "2021-01-01T18:00:00.000Z", "2021-01-01T00:00:00.000Z"},
    };

    for (const auto& [granularity, input, expectedOutput] : testCases) {
        auto inputDate = dateFromISOString(input);
        ASSERT_OK(inputDate);
        auto roundedDate =
            timeseries::roundTimestampToGranularity(inputDate.getValue(), granularity);
        ASSERT_EQ(dateToISOStringUTC(roundedDate), expectedOutput);
    }
}

}  // namespace mongo