#include "mapobject.h"
#include <stdlib.h>

MapObject * MapObjectInit(Sprite *sprite){
    MapObject *new = malloc(sizeof(MapObject));

    new->sprite = sprite;
    new->next = 0;
    new->prev = 0;

    return new;
}

MapObjectList * MapObjectListInit(){
    MapObjectList *new = malloc(sizeof(MapObjectList));
    new->head = 0;
    new->tail = 0;
    return new;
}

void MapObjectListPrintForward(MapObjectList *mapObjects){

}

void MapObjectListInsert(MapObjectList *mapObjects, MapObject *data){
    if(mapObjects->head == 0){
        mapObjects->head = data;
        mapObjects->tail = data;
    }
    else{
        mapObjects->tail->next = data;
        data->prev = mapObjects->tail;
        mapObjects->tail = data;
    }
}
void MapObjectListRemove(MapObjectList *mapObjects, MapObject *remove){
    if(remove == 0){
        printf("WARNING: TRIED TO REMOVE NULLPOINTER\n");
    }
    else if(mapObjects->head == remove && mapObjects->tail == remove){
        mapObjects->head = 0;
        mapObjects->tail = 0;
    }
    else if(mapObjects->head == remove){
        remove->next->prev = 0;
        mapObjects->head = remove->next;
    }
    else if(mapObjects->tail == remove){
        remove->prev->next = 0;
        mapObjects->tail = remove->prev;
    }
    else{
        remove->prev->next = remove->next;
        remove->next->prev = remove->prev;
    }

    remove->next = 0;
    remove->prev = 0;
}