#pragma once

#include "utils/array_store.hpp"
#include "utils/void.hpp"

// Common menthods for translating Vertex/Edge representations from serialized
// form into database form.
// Implementor should override those methods which he needs, and ignore the
// rest.
// Caller is responisble to structure his calls as following:
//
//
// End goal would be to enforce these rules during compile time.
class GraphDecoder
{
public:
    // Starts reading vertex.
    Id vertex_start();

    // Returns number of stored labels.
    size_t label_count();

    // Wiil read label into given storage.
    std::string const &label();

    // Ends reading vertex
    void vertex_end() {}

    // Starts reading edge. Return from to ids of connected vertices.
    std::pair<Id, Id> edge_start();

    // Reads edge_type into given storage.
    std::string const &edge_type();

    // Ends reading edge.
    void edge_end() {}

    // Returns number of stored propertys.
    size_t property_count();

    // Reads property name into given storage.
    std::string const &property_name();

    // Reads property and calls T::handle for that property .
    template <class T>
    T property();
};