/**
 *    Copyright (C) 2022-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/logv2/log.h"
#include "mongo/s/sharding_router_test_fixture.h"
#include "mongo/s/stale_shard_version_helpers.h"
#include "mongo/unittest/unittest.h"
#include "mongo/util/assert_util.h"

#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kTest

namespace mongo {
namespace {

class AsyncShardVersionRetry : public ShardingTestFixture {
public:
    NamespaceString nss() const {
        return NamespaceString("test", "foo");
    }

    StringData desc() const {
        return "shardVersionRetryTest"_sd;
    }

    ServiceContext* service() {
        return operationContext()->getServiceContext();
    }

    std::shared_ptr<executor::TaskExecutor> getExecutor() const {
        return executor();
    }

private:
    CancellationSource _cancellationSource;
};

TEST_F(AsyncShardVersionRetry, NoErrorsWithVoidReturnTypeCallback) {
    CancellationSource cancellationSource;
    auto token = cancellationSource.token();
    auto catalogCache = Grid::get(service())->catalogCache();

    auto future = shardVersionRetry(
        service(), nss(), catalogCache, desc(), getExecutor(), token, [&](OperationContext*) {});

    future.get();
}

TEST_F(AsyncShardVersionRetry, NoErrorsWithNonVoidReturnTypeCallback) {
    CancellationSource cancellationSource;
    auto token = cancellationSource.token();
    auto catalogCache = Grid::get(service())->catalogCache();

    auto future = shardVersionRetry(
        service(), nss(), catalogCache, desc(), getExecutor(), token, [&](OperationContext*) {
            return "pass";
        });

    ASSERT_EQ("pass", future.get());
}

TEST_F(AsyncShardVersionRetry, LimitedStaleErrorsShouldReturnCorrectValue) {
    CancellationSource cancellationSource;
    auto token = cancellationSource.token();
    auto catalogCache = Grid::get(service())->catalogCache();

    int tries = 0;
    auto future = shardVersionRetry(
        service(), nss(), catalogCache, desc(), getExecutor(), token, [&](OperationContext*) {
            if (++tries < 5) {
                const CollectionGeneration gen1(OID::gen(), Timestamp(1, 0));
                const CollectionGeneration gen2(OID::gen(), Timestamp(1, 0));
                uassert(
                    StaleConfigInfo(nss(),
                                    ShardVersion(ChunkVersion(gen1, {5, 23}),
                                                 boost::optional<CollectionIndexes>(boost::none)),
                                    ShardVersion(ChunkVersion(gen2, {6, 99}),
                                                 boost::optional<CollectionIndexes>(boost::none)),
                                    ShardId("sB")),
                    "testX",
                    false);
            }

            return 10;
        });

    ASSERT_EQ(10, future.get());
}

TEST_F(AsyncShardVersionRetry, ExhaustedRetriesShouldThrowOriginalException) {
    CancellationSource cancellationSource;
    auto token = cancellationSource.token();
    auto catalogCache = Grid::get(service())->catalogCache();

    int tries = 0;
    auto future = shardVersionRetry(
        service(), nss(), catalogCache, desc(), getExecutor(), token, [&](OperationContext*) {
            if (++tries < 2 * kMaxNumStaleVersionRetries) {
                uassert(StaleDbRoutingVersion(nss().db().toString(),
                                              DatabaseVersion(UUID::gen(), Timestamp(2, 3)),
                                              DatabaseVersion(UUID::gen(), Timestamp(5, 3))),
                        "testX",
                        false);
            }

            return 10;
        });

    ASSERT_THROWS_CODE(future.get(), DBException, ErrorCodes::StaleDbVersion);
}

}  // namespace
}  // namespace mongo