text: #pragma once
  #include <crpch.h>
  
  #include "Crystal/Core/Base.h"
  
  namespace Crystal
  {
  	//Events are Blocking.
  	//Should prob be non-blocking later.
  
  	enum class EventType
  	{
  		None = 0,
  		WindowClose, WindowResize, WindowFocus, WindowLostFocus, WindowMoved,
  		AppTick, AppUpdate, AppRender,
  		KeyPressed, KeyReleased, KeyTyped,
  		MouseButtonPressed, MouseButtonReleased, MouseMoved, MouseScrolled
  	};
  
  	enum EventCategory
  	{
  		None = 0,
  		EventCategoryApplication = BIT(0),
  		EventCategoryInput       = BIT(1),
  		EventCategoryKeyboard    = BIT(2),
  		EventCategoryMouse       = BIT(3),
  		EventCategoryMouseButton = BIT(4)
  	};
  
  #define EVENT_CLASS_TYPE(type)	static  EventType GetStaticType() { return EventType::type; } \
  								virtual EventType GetEventType() const override { return GetStaticType(); }\
  								virtual const char* GetName() const override { return #type; }
  
  #define EVENT_CLASS_CATEGORY(category) virtual int GetCategoryFlags() const override { return category; }
  
  	class Event
  	{
  	public:
  		virtual ~Event() = default;
  
  		bool Handled = false;
  
  		virtual EventType GetEventType() const = 0;
  		virtual const char* GetName() const = 0;  //Debug only?
  		virtual int GetCategoryFlags() const = 0; //Debug only?
  		virtual std::string ToString() const { return GetName(); }
  
  		bool IsInCategory(EventCategory category)
  		{
  			return GetCategoryFlags() & category;
  		}
  	};
  
  	class EventDispatcher
  	{
  	public:
  		EventDispatcher(Event& event)
  			: m_Event(event){}
  
  		template<typename T, typename F>
  		bool Dispatch(const F& func)
  		{
  			if (m_Event.GetEventType() == T::GetStaticType())
  			{
  				m_Event.Handled = func(static_cast<T&>(m_Event));
  				return true;
  			}
  			return false;
  		}
  	private:
  		Event& m_Event;
  	};
  
  	inline std::ostream& operator<<(std::ostream& os, const Event& e)
  	{
  		return os << e.ToString();
  	}
  }
  