#include <stdio.h>
#include <math.h>
#include <stdlib.h>

typedef char const* (*PTRFUN)();

typedef struct {
    PTRFUN *vtable;
    char* imeLjubimca;
} Animal;

typedef void (*funptrVF)(Animal*);

void AnimalPrintGreeting(Animal *obj) {
    printf("%s pozdravlja: %s!", obj->imeLjubimca, obj->vtable[0]());
}

void AnimalPrintMenu(Animal *obj) {
    printf("%s voli %s!", obj->imeLjubimca, obj->vtable[1]());
}

PTRFUN AnimalVTable[2] = {
        (PTRFUN)NULL,
        (PTRFUN)NULL
};

AnimalInit(Animal* obj) {
    obj->vtable = AnimalVTable;
}

//|||||||||||||||||||||||||||||||||||||
//razred Dog
//|||||||||||||||||||||||||||||||||||||

typedef struct{
    PTRFUN *vtable;
} Dog;

char const* dogGreet(void){
    return "vau!";
}

char const* dogMenu(void){
    return "kuhanu govedinu";
}

PTRFUN DogVTable[2] = {
        (PTRFUN)dogGreet,
        (PTRFUN)dogMenu
};

Animal* createDog(char* imeLjubimca) {
    Animal* obj = (Animal*)malloc(sizeof(Dog));
    constructDog(obj, &imeLjubimca);
    return obj;
}

void constructDog(Animal* obj, char* imeLjubimca) {
    AnimalInit((Animal*) obj);
    obj->vtable = DogVTable;
    obj->imeLjubimca = imeLjubimca;
}


//|||||||||||||||||||||||||||||||||||||
//razred Cat
//|||||||||||||||||||||||||||||||||||||


typedef struct{
    PTRFUN *vtable;
} Cat;

char const* catGreet(void){
    return "mijau!";
}

char const* catMenu(void){
    return "konzerviranu tunjevinu";
}

PTRFUN CatVTable[2] = {
        (PTRFUN)catGreet,
        (PTRFUN)catMenu
};

Animal* createCat(char* imeLjubimca) {
    Animal* obj = (Animal*)malloc(sizeof(Cat));
    constructCat(obj, &imeLjubimca);
    return obj;
}

void constructCat(Animal* obj, char* imeLjubimca) {
    AnimalInit((Animal*) obj);
    obj->vtable = CatVTable;
    obj->imeLjubimca = imeLjubimca;
}

void testAnimals(void){
    struct Animal* p1 = createDog("Hamlet");
    struct Animal* p2 = createCat("Ofelija");
    struct Animal* p3 = createDog("Polonije");

    animalPrintGreeting(p1);
    animalPrintGreeting(p2);
    animalPrintGreeting(p3);

    animalPrintMenu(p1);
    animalPrintMenu(p2);
    animalPrintMenu(p3);

    free(p1); free(p2); free(p3);
}

int main(){
    testAnimals();
    return 0;
}