#include "animation.h"

#include <stdio.h>
#include <stdlib.h>
#include <SDL\SDL.h>

#include "memory.h"

int
Anim_load(const char *filePath, ANIMATION *anim) {
    if (filePath != NULL) {
        FILE *file = NULL;

        file = fopen(filePath, "r");

        if (file != NULL) {
            fscanf(file, "%u %d\n", &anim->delay, &anim->totalFrames);

            anim->frames = xmalloc(anim->totalFrames * sizeof(int));
            anim->actFrame = 0;

            anim->time.act = 0;
            anim->time.old = 0;

            for (int frame = 0; frame < anim->totalFrames; ++frame) {
                fscanf(file, "%d", &anim->frames[frame]);
            }
            return 0;
        }
    }
    return 1;
}

void
Anim_free(ANIMATION *anim) {
    xfree(anim->frames);
}

void
Anim_play(ANIMATION *anim, int *entityState) {
    anim->time.act = SDL_GetTicks();

    if ((anim->time.act - anim->time.old) > anim->delay) {
        *entityState = anim->frames[anim->actFrame++];

        anim->time.old = anim->time.act++;

        if (anim->actFrame >= anim->totalFrames) {
            anim->actFrame = 0;
        }
    }
}