#include "sprite-animator.h"

void update_frame(animation_player_t *anim){
    if (anim->frame_speed == 0){
        return;
    }

    anim->frame_counter++;
    if (anim->frame_counter >= (FPS / anim->frame_speed)){
        anim->frame_counter = 0;

        anim->frame_current = anim->frame_current + anim->index_increment;
        if (anim->frame_current >= anim->index_end) {
            anim->frame_current = anim->index_start + anim->index_offset;
        }

        anim->frame_rec.x = (anim->frame_current % 8) * anim->frame_width;
        anim->frame_rec.y = (anim->frame_current / 8) * anim->frame_height;
    }
}

void draw_frame(animation_player_t *anim, Vector2 pos, Color tint){
    DrawTextureRec(*anim->sheet, anim->frame_rec, pos, tint);
}

animation_player_t make_animation_player
(Texture2D *texture, int row, int col, int start, int end, int inc, int offset){
    float w = texture->width / col;
    float h = texture->height / row;
    return (animation_player_t){
        .sheet = texture,
        .frame_counter = 0,
        .frame_speed = 5,
        .frame_width = w,
        .frame_height = h,
        .index_start = start,
        .index_end = end,
        .index_increment = inc,
        .index_offset = offset,
        .frame_current = start,
        .frame_rec = (Rectangle){ 0, 0, w, h }
    };
}

void draw_frame_box(animation_player_t *anim, Vector2 pos){
    DrawRectangleLines(pos.x, pos.y, anim->frame_width, anim->frame_height, SKYBLUE);
}