#include "cj_types.j"

library ItemLifeSys initializer Init
{
    private item array itemPool;
    private float array itemLifeTime
    private int itemCount = 0;
    private constant float lifeTime = 120.0;
    private timer sysTimer = null;
    private constant float sysPeriod = 1.0;

    private void Core()
    {
        int i = 0;
        while(i < itemCount)
        {
            if (itemLifeTime[i] > 0.0)
            {
                itemLifeTime[i]-=sysPeriod;
                i++;
            }
            else
            {
                itemCount--;
                RemoveItem(itemPool[i]);
                itemPool[i] = null;
                itemLifeTime[i] = 0.0;
                if (i != itemCount)
                {
                    itemPool[i] = itemPool[itemCount];
                    itemLifeTime[i] = itemLifeTime[itemCount];
                }
                if(itemCount == 0)
                {
                    DestroyTimer(sysTimer);
                }
            }
        }
    }
    
    #define AddItemLifeTime(droppedItem) =
    {
        itemPool[itemCount] = droppedItem;
        itemLifeTime[itemCount] = lifeTime;
        if (itemCount == 0)
        {
            sysTimer = CreateTimer();
            TimerStart(sysTimer,sysPeriod, true, function Core);
        }
        itemCount++;
    }
    
    OnEvent(EVENT_PLAYER_UNIT_DROP_ITEM, AddItemLifeTime(GetManipulatedItem()));
}