#include "state.h"
#include "world.h"

#include <SDL2/SDL.h>

const char     *tc_window_title_g = "Techneck";
techneck_s      tc_game_state_g;

void tc_init_renderer(techneck_s *techneck)
{
    SDL_Init(SDL_INIT_EVERYTHING);
    
    techneck->renderer.window                   = SDL_CreateWindow(
        tc_window_title_g,
        SDL_WINDOWPOS_CENTERED,
        SDL_WINDOWPOS_CENTERED,
        1200,
        800,
        SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE
    );
    
    techneck->renderer.active_camera.position.x = 0.0f;
    techneck->renderer.active_camera.position.y = 0.0f;
    techneck->renderer.active_camera.position.z = 0.0f;
    
    techneck->renderer.gl_context               = SDL_GL_CreateContext(techneck->renderer.window);
    gladLoadGLLoader(&SDL_GL_GetProcAddress);
    gladLoadGL();
    
    techneck->renderer.draw_shader                 = tc_make_shader_program("vertex_shader.glsl", "fragment_shader.glsl");
    
    glEnable(GL_DEPTH_TEST);
    //glEnable(GL_CULL_FACE);
    //glCullFace(GL_BACK);
}

void tc_load_textures()
{
    tc_game_state_g.block_texture_atlas = tc_load_image_from_disk("assets/block_atlas.png");
    tc_game_state_g.block_texture_atlas->name = "Atlas";
    tc_upload_image(tc_game_state_g.block_texture_atlas);
    
    tc_image_s             *dirt        =
        tc_create_subimage(tc_game_state_g.block_texture_atlas, 0, 0, 8, 8);
    dirt->name                  = "dirt";
    
    tc_image_s             *grass       =
        tc_create_subimage(tc_game_state_g.block_texture_atlas, 8, 0, 8, 8);
    grass->name                 = "grass-side";
    
    tc_image_s             *grass_top   =
        tc_create_subimage(tc_game_state_g.block_texture_atlas, 8, 8, 8, 8);
    grass_top->name             = "grass-top";
    
    tc_image_s             *stone       =
        tc_create_subimage(tc_game_state_g.block_texture_atlas, 16, 0, 8, 8);
    stone->name                 = "stone";
}

void tc_init()
{
    tc_init_renderer(&tc_game_state_g);
    tc_game_state_g.asset_storage      = tc_init_asset_storage("assets/");
    tc_load_textures();
    tc_game_state_g.block_registry     = tc_init_blocks();
    tc_create_blocks();
    tc_init_worlds();
    tc_game_state_g.main_world         = tc_new_world(&tc_default_terrain_generator_g);
    
    puts("Finished initializing!");
}

void tc_cleanup()
{
    SDL_GL_DeleteContext(tc_game_state_g.renderer.gl_context);
    SDL_DestroyWindow(tc_game_state_g.renderer.window);
}