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#pragma once

#include <iostream>
#include <string>

using namespace std::string_view_literals;

class IdentityDocument {
public:
    void (IdentityDocument::*vMethod)()const;
    void (IdentityDocument::*vdel)();
    IdentityDocument()
        : unique_id_(++unique_id_count_) 
    {
            this->vMethod = (void (IdentityDocument::*)()const)&IdentityDocument::ID;
            this->vdel = (void (IdentityDocument::*)())&IdentityDocument::Del;
        std::cout << "IdentityDocument::Ctor() : "sv << unique_id_ << std::endl;
    }

    ~IdentityDocument() {
        --unique_id_count_;
        std::cout << "IdentityDocument::Dtor() : "sv << unique_id_ << std::endl;
    }

    IdentityDocument(const IdentityDocument& other)
        : unique_id_(++unique_id_count_) 
    {
            this->vMethod = (void (IdentityDocument::*)()const)&IdentityDocument::ID;
            this->vdel = (void (IdentityDocument::*)())&IdentityDocument::Del;
        std::cout << "IdentityDocument::CCtor() : "sv << unique_id_ << std::endl;
    }

    IdentityDocument& operator=(const IdentityDocument&) = delete;

    void PrintID() const {
        std::cout << "base print" << std::endl;
        (this->*vMethod)();
    }

    static void PrintUniqueIDCount() {
        std::cout << "unique_id_count_ : "sv << unique_id_count_ << std::endl;
    }

    int GetID() const {
        return unique_id_;
    }
    
    void Delete()
    {
        (this->*vdel)();
    }

private:
    void Del()
    {
        delete this;
    }
    void ID() const {
        std::cout << "IdentityDocument::PrintID() : "sv << unique_id_ << std::endl;
    }
    static int unique_id_count_;
    int unique_id_;
};

int IdentityDocument::unique_id_count_ = 0;