#ifndef TC_WORLD_H
#define TC_WORLD_H

#include <stdbool.h>

#include <blocks.h>
#include <hook.h>
#include <physics/simulation.h>
#include <utility/math.h>
#include <entity/entity.h>
#include <world/chunk.h>
#include <world/chunk_pool.h>


#define UPDATE_DISTANCE 2


typedef struct  tc_block                tc_block_s;
typedef struct  tc_world                tc_world_s;


typedef struct tc_worldgen              tc_worldgen_s;

struct tc_worldgen {
    char               *name;
    bool_t            (*fn_generate_chunk)              (tc_worldgen_s *gen, tc_chunk_s *chunk);
    
};

struct tc_block
{
    u32_t                       type_identifier;
    tc_vec3f_s                  position;
    tc_vec3f_s                  rotation;
    
};



struct tc_world
{
    tc_chunk_pool_s            *pool;
    tc_worldgen_s              *worldgen;
    
    u32_t                       num_loaders;
    tc_chunkloader_s           *loaders;
    
    tc_chunkloader_s           *spawn_loader;
    tc_physics_simulation_s    *physics;
    
    tc_hooklist_s               on_chunk_create;
    tc_hooklist_s               before_chunk_generate;
    tc_hooklist_s               after_chunk_generate;
    tc_hooklist_s               on_chunk_update;
    tc_hooklist_s               on_chunk_unload;
    tc_hooklist_s               on_chunk_delete;
};

extern tc_worldgen_s tc_default_terrain_generator_g;

void                tc_init_worlds          ();
void                tc_draw_world           (tc_world_s *world);

tc_world_s *        tc_new_world            (tc_worldgen_s *generator);
tc_chunk_s *        tc_new_chunk            (tc_world_s *world, i32_t x, i32_t y, i32_t z); // must be integers

void tc_set_block_in_chunk(
    tc_chunk_s *chunk,
    u8_t x, u8_t y, u8_t z,
    tc_block_s block
);

void                tc_update_world                         (tc_world_s *world);
void                tc_unload_world                         (tc_world_s *world);

bool_t              tc_generate_default_terrain_chunk       (tc_worldgen_s *gen, tc_chunk_s *chunk);

void                tc_create_world_physics                 (tc_world_s *world, void *userdata);

#endif