#pragma once

#include "fwd.hpp"

#include <QDateTime>
#include <cstddef>
#include <vector>

struct KnowledgeId
{
	size_t id;
};

class KnowledgeFragment
{
private:
	QDateTime createTime;
	QDateTime modifyTime;
	KnowledgeId id;

public:
    KnowledgeFragment(KnowledgeId id);

    KnowledgeId getId() const;
};

class KnowledgeDatabase
{
private:
    std::vector<KnowledgeFragment> storage;
    std::vector<size_t> index; // Mapping from KnowledgeId (index) to `storage` index
    KnowledgeId nextId;

public:
    KnowledgeId allocateFragment();
    bool deleteFragment(KnowledgeId id);
    KnowledgeFragment* getFragment(KnowledgeId id);
};