EventCalendar.h

#ifndef __EVENT_CALENDAR_EVENT_CALENDAR_H__
#define __EVENT_CALENDAR_EVENT_CALENDAR_H__

#include <vector>
#include "EventType.h"
#include "../Constants/Constants.h"

namespace MDSimulation
{
    class EventCalendar
    {
    private:

        struct CalendarNode
        {
            CalendarNode* Parent;   
            CalendarNode* Left;     
            CalendarNode* Right;    
            CalendarNode* CircleAL; 
            CalendarNode* CircleAR; 
            CalendarNode* CircleBL; 
            CalendarNode* CircleBR; 
            double Time;    
            int ObjectA;    
            int ObjectB;    
            EventType Type; 
            CalendarNode();
            CalendarNode(const CalendarNode& other);

            void Insert(CalendarNode* ins);

            CalendarNode* Delete();

            std::pair<unsigned long, unsigned long> MinMax() const;
        };

        std::vector<CalendarNode> ListAnchor;  // Entry point for circularly linked lists

        CalendarNode* FreeList;     
        CalendarNode* Root;         
        bool HasStepped;            
        double CurrentEventTime;    
        int CurrentEventObjectA;    
        int CurrentEventObjectB;    
        EventType CurrentEventType; 
        CalendarNode* AllocateNode();

        void FreeNode(CalendarNode* node);

        CalendarNode* SafeDelete(CalendarNode* node);

        bool NodeInTree(CalendarNode const * const node);

    public:

        EventCalendar(const unsigned particleCount);

        ~EventCalendar();

        void ScheduleEvent(const double time, const EventType type,
                           const int idA=Constants::NULL_PARTICLE,
                           const int idB=Constants::NULL_PARTICLE);

        void NextEvent();

        bool HasMoreEvents();

        void ClearCalendar();

        double GetCurrentTime() const;

        int GetCurrentObjectA() const;

        int GetCurrentObjectB() const;

        double BalanceRatio() const;

        EventType GetCurrentEventType() const;
    };
}

#endif  /* __EVENT_CALENDAR_H__ */