/// @file        Connection.hpp
/// @description Callback handler for event connections
/// @author      Josh O'Leary - Redacted Software
/// @revision    3
/// @lastedit    2024-02-21
/// @license     Unlicense - Public Domain

#pragma once

#include <functional>
#include <Event.h>

template <typename delegate, typename ... Args>
class BasicEvent;

/// A type that represents a handle to an active event connection.
template <typename delegate, typename ... Args>
class Connection {
private:
public:
    Connection(BasicEvent<delegate, Args...> *creator, delegate cb);
    bool Disconnect(); // Breaks the event connection, but does not destroy the instance
    void Invoke(Args... e);
private:
    BasicEvent<delegate, Args...> * owner;
    delegate callback;
    bool active = true;
};

template<typename delegate, typename... Args>
Connection<delegate, Args...>::Connection(BasicEvent<delegate, Args...> *creator, delegate cb) : owner(creator), callback(std::move(cb)) {}


template <typename delegate, typename... Args>
void Connection<delegate, Args...>::Invoke(Args... e) { callback(e...); }

template <typename delegate, typename ... Args>
bool Connection<delegate, Args...>::Disconnect() {
    if (active) {
        owner->Disconnect(this);
        active = false;
        return true;
    }
    return false;
}