#include "../include/animated_texture.h"
#include <stdlib.h>

AnimatedTexture animated_texture_create(
    const char *file_path, int number_of_frames, float speed
) {
    Texture2D texture = LoadTexture(file_path);

    Rectangle current_frame = { 0, 0, texture.width / (float)number_of_frames, texture.height };

    return (AnimatedTexture){
        .number_of_frames = number_of_frames,
        .current_frame = current_frame,
        .duration_left = 1.0f,
        .speed = speed,
        .texture = texture
    };
}

int animated_texture_delete(AnimatedTexture animated_texture) {
    UnloadTexture(animated_texture.texture);

    return EXIT_SUCCESS;
}

void animated_texture_update(AnimatedTexture *animated_texture) {
    float delta_time = GetFrameTime();
    animated_texture->duration_left -= delta_time * animated_texture->speed;

    if (animated_texture->duration_left > 0.0)
        return;

    animated_texture->duration_left = 1.0f;

    Rectangle next_frame = {
        ((int)animated_texture->current_frame.x
         + (int)animated_texture->current_frame.width)
            % animated_texture->texture.width,
        0, animated_texture->current_frame.width,
        animated_texture->current_frame.height
    };

    animated_texture->current_frame = next_frame;
}

void animated_texture_draw(
    AnimatedTexture *animated_texture, Vector2 position, Color tint
) {
    Rectangle dest = { position.x, position.y, animated_texture->current_frame.width, animated_texture->current_frame.height };

    DrawTexturePro(
        animated_texture->texture, animated_texture->current_frame, dest, (Vector2){ 0, 0 }, 0.0f, tint
    );
}