/**
 *    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/platform/basic.h"

#include "mongo/db/s/global_user_write_block_state.h"
#include "mongo/db/write_block_bypass.h"

#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kSharding


namespace mongo {

namespace {
const auto serviceDecorator = ServiceContext::declareDecoration<GlobalUserWriteBlockState>();
}  // namespace

GlobalUserWriteBlockState* GlobalUserWriteBlockState::get(ServiceContext* serviceContext) {
    return &serviceDecorator(serviceContext);
}

GlobalUserWriteBlockState* GlobalUserWriteBlockState::get(OperationContext* opCtx) {
    return get(opCtx->getServiceContext());
}

void GlobalUserWriteBlockState::enableUserWriteBlocking(OperationContext* opCtx) {
    _globalUserWritesBlocked.store(true);
}

void GlobalUserWriteBlockState::disableUserWriteBlocking(OperationContext* opCtx) {
    _globalUserWritesBlocked.store(false);
}

void GlobalUserWriteBlockState::checkUserWritesAllowed(OperationContext* opCtx,
                                                       const NamespaceString& nss) const {
    invariant(opCtx->lockState()->isLocked());
    uassert(ErrorCodes::UserWritesBlocked,
            "User writes blocked",
            !_globalUserWritesBlocked.load() ||
                WriteBlockBypass::get(opCtx).isWriteBlockBypassEnabled() || nss.isOnInternalDb() ||
                nss.isTemporaryReshardingCollection() || nss.isSystemDotProfile());
}

bool GlobalUserWriteBlockState::isUserWriteBlockingEnabled(OperationContext* opCtx) const {
    invariant(opCtx->lockState()->isLocked());
    return _globalUserWritesBlocked.load();
}

void GlobalUserWriteBlockState::enableUserShardedDDLBlocking(OperationContext* opCtx) {
    _userShardedDDLBlocked.store(true);
}

void GlobalUserWriteBlockState::disableUserShardedDDLBlocking(OperationContext* opCtx) {
    _userShardedDDLBlocked.store(false);
}

void GlobalUserWriteBlockState::checkShardedDDLAllowedToStart(OperationContext* opCtx,
                                                              const NamespaceString& nss) const {
    invariant(serverGlobalParams.clusterRole == ClusterRole::ShardServer);
    uassert(ErrorCodes::UserWritesBlocked,
            "User writes blocked",
            !_userShardedDDLBlocked.load() ||
                WriteBlockBypass::get(opCtx).isWriteBlockBypassEnabled() || nss.isOnInternalDb());
}

void GlobalUserWriteBlockState::enableUserIndexBuildBlocking(OperationContext* opCtx) {
    _userIndexBuildsBlocked.store(true);
}

void GlobalUserWriteBlockState::disableUserIndexBuildBlocking(OperationContext* opCtx) {
    _userIndexBuildsBlocked.store(false);
}

Status GlobalUserWriteBlockState::checkIfIndexBuildAllowedToStart(
    OperationContext* opCtx, const NamespaceString& nss) const {
    if (_userIndexBuildsBlocked.load() &&
        !WriteBlockBypass::get(opCtx).isWriteBlockBypassEnabled() && !nss.isOnInternalDb()) {
        return Status(ErrorCodes::UserWritesBlocked, "User writes blocked");
    }
    return Status::OK();
}

}  // namespace mongo