/**
 *    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.
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 *    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,
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 */

#include "mongo/db/catalog/catalog_helper.h"

#include "mongo/db/catalog/database_holder.h"
#include "mongo/db/catalog_raii.h"
#include "mongo/db/s/database_sharding_state.h"
#include "mongo/db/s/operation_sharding_state.h"
#include "mongo/db/s/sharding_migration_critical_section.h"
#include "mongo/db/s/sharding_state.h"
#include "mongo/s/stale_exception.h"

namespace mongo::catalog_helper {

void assertMatchingDbVersion(OperationContext* opCtx, const StringData& dbName) {
    const auto receivedVersion = OperationShardingState::get(opCtx).getDbVersion(dbName);
    if (!receivedVersion) {
        return;
    }

    {
        auto scopedDss = DatabaseShardingState::acquire(opCtx, dbName, DSSAcquisitionMode::kShared);
        const auto critSecSignal = scopedDss->getCriticalSectionSignal(
            opCtx->lockState()->isWriteLocked() ? ShardingMigrationCriticalSection::kWrite
                                                : ShardingMigrationCriticalSection::kRead);
        uassert(
            StaleDbRoutingVersion(dbName.toString(), *receivedVersion, boost::none, critSecSignal),
            str::stream() << "The critical section for the database " << dbName
                          << " is acquired with reason: " << scopedDss->getCriticalSectionReason(),
            !critSecSignal);
    }

    const auto wantedVersion = DatabaseHolder::get(opCtx)->getDbVersion(opCtx, dbName);
    uassert(StaleDbRoutingVersion(dbName.toString(), *receivedVersion, boost::none),
            str::stream() << "No cached info for the database " << dbName,
            wantedVersion);

    uassert(StaleDbRoutingVersion(dbName.toString(), *receivedVersion, *wantedVersion),
            str::stream() << "Version mismatch for the database " << dbName,
            *receivedVersion == *wantedVersion);
}

void assertIsPrimaryShardForDb(OperationContext* opCtx, const StringData& dbName) {
    invariant(dbName != NamespaceString::kConfigDb);

    uassert(ErrorCodes::IllegalOperation,
            str::stream() << "Received request without the version for the database " << dbName,
            OperationShardingState::get(opCtx).hasDbVersion());

    // Recover the database's information if necessary (not cached or not matching).
    AutoGetDb autoDb(opCtx, dbName, MODE_IS);
    invariant(autoDb.getDb());

    const auto primaryShardId = DatabaseHolder::get(opCtx)->getDbPrimary(opCtx, dbName).value();
    const auto thisShardId = ShardingState::get(opCtx)->shardId();
    uassert(ErrorCodes::IllegalOperation,
            str::stream() << "This is not the primary shard for the database " << dbName
                          << ". Expected: " << primaryShardId << " Actual: " << thisShardId,
            primaryShardId == thisShardId);
}

}  // namespace mongo::catalog_helper