#include "assets.h"
#include "state.h"

#include <stdlib.h>

#define STB_IMAGE_IMPLEMENTATION
#include <stb_image.h>

tc_asset_storage_s tc_init_asset_storage(char *asset_folder_path)
{
    tc_asset_storage_s          assets;
    assets.images_capacity          = 256;
    assets.num_images               = 0;
    assets.images                   = calloc(sizeof(tc_image_s *), assets.images_capacity);
    
    return assets;
}

void tc_upload_image(tc_image_s *image)
{
    glGenTextures(1, &image->gl_identifier);
    glBindTexture(GL_TEXTURE_2D, image->gl_identifier);
    
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    
    glTexImage2D(GL_TEXTURE_2D,
        0,
        GL_RGBA,
        image->width, image->height,
        0,
        GL_RGBA,
        GL_UNSIGNED_BYTE,
        image->pixels
    );
}

tc_image_s * tc_load_image_from_disk(char *path)
{
    tc_image_s                 *image               = malloc(sizeof(tc_image_s));
    image->attributes_capacity      = 8;
    image->attributes               = calloc(sizeof(tc_asset_attribute_s), image->attributes_capacity);
    image->num_attributes           = 0;
    image->pixels                   = stbi_load(path, &image->width, &image->height, NULL, 4);
    image->len_name                 = 0;
    image->name                     = NULL;
    
    if(tc_game_state_g.asset_storage.num_images >= tc_game_state_g.asset_storage.images_capacity)
    {
        tc_game_state_g.asset_storage.images_capacity  *= 2;
        tc_game_state_g.asset_storage.images            =
            realloc(tc_game_state_g.asset_storage.images,
            sizeof(tc_image_s *) * tc_game_state_g.asset_storage.images_capacity
        );
    }
    
    tc_game_state_g.asset_storage.images[tc_game_state_g.asset_storage.num_images] = image;
    
    return image;
}