// Copyright 2024 Memgraph Ltd.
//
// Use of this software is governed by the Business Source License
// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
// License, and you may not use this file except in compliance with the Business Source License.
//
// As of the Change Date specified in that file, in accordance with
// the Business Source License, use of this software will be governed
// by the Apache License, Version 2.0, included in the file
// licenses/APL.txt.

#pragma once

#include "storage/v2/delta.hpp"
#include "utils/skip_list.hpp"

namespace memgraph::utils {

inline std::optional<std::string> GetOldDiskKeyOrNull(storage::Delta *head) {
  while (head->next != nullptr) {
    head = head->next;
  }
  if (head->action == storage::Delta::Action::DELETE_DESERIALIZED_OBJECT) {
    return head->old_disk_key.value.as_opt_str();
  }
  return std::nullopt;
}

template <typename TSkipListAccessor>
inline bool ObjectExistsInCache(TSkipListAccessor &accessor, storage::Gid gid) {
  return accessor.find(gid) != accessor.end();
}

inline uint64_t GetEarliestTimestamp(storage::Delta *head) {
  if (head == nullptr) return 0;
  while (head->next != nullptr) {
    head = head->next;
  }
  return head->timestamp->load(std::memory_order_acquire);
}

}  // namespace memgraph::utils