#pragma once
#include <unordered_map>
#include <memory>
#include "event.h"
#include "keyCodes.h"
#include "eventHandler.h"
#include <vector>
// using EventType = std::uint32_t;
// using EventId = std::uint64_t;

class EventManager {
public:
    EventManager(const EventManager&) = delete;
    const EventManager& operator=(const EventManager&) = delete;
    static EventManager& getInstance() {
        static EventManager instance;
        return instance;
    }

    void shutdown();
    void subscribe(int eventType, std::unique_ptr<IEventHandlerWrapper>&& handler, int eventId);
    void unsubscribe(int eventType, const std::string& handlerName, int eventId);
    void triggerEvent(const Event& event_, int eventId);
    void queueEvent(std::unique_ptr<Event>&& event_, int eventId);
    void dispatchEvents();

private:
    EventManager() = default;
    std::vector<std::pair<std::unique_ptr<Event>, int>> m_eventsQueue;
    std::unordered_map<int, std::vector<std::unique_ptr<IEventHandlerWrapper>>> m_subscribers;
    std::unordered_map<int, std::unordered_map<int, std::vector<std::unique_ptr<IEventHandlerWrapper>>>> m_subscribersByEventId;
};


template<typename EventType>
inline void subscribe(const EventHandler<EventType>& callback, int eventId = 0, const bool unsubscribeOnSuccess = false)
{
    std::unique_ptr<IEventHandlerWrapper> handler = std::make_unique<EventHandlerWrapper<EventType>>(callback, unsubscribeOnSuccess);
    EventManager::getInstance().subscribe(EventType::getStaticEventType(), std::move(handler), eventId);
}

template<typename EventType>
inline void unsubscribe(const EventHandler<EventType>& callback, int eventId = 0)
{
    const std::string handlerName = callback.target_type().name();
    EventManager::getInstance().unsubscribe(EventType::getStaticEventType(), handlerName, eventId);
}

inline void triggerEvent(const Event& triggeredEvent, int eventId = 0)
{
    EventManager::getInstance().triggerEvent(triggeredEvent, eventId);
}

inline void queueEvent(std::unique_ptr<Event>&& queuedEvent, int eventId = 0)
{
    EventManager::getInstance().queueEvent(std::forward<std::unique_ptr<Event>>(queuedEvent), eventId);
}