#ifndef TC_WORLD_UPDATER_INTERNAL_H
#define TC_WORLD_UPDATER_INTERNAL_H

#include <world/world.h>
#include <utility/location.h>
#include <utility/promise.h>

typedef struct  tc_world_updater_queue              tc_world_updater_queue_s;
typedef struct  tc_world_updater_command            tc_world_updater_command_s;

typedef enum
{
    TC_WORLD_UPDATER_COMMAND_UNKNOWN,
    TC_WORLD_UPDATER_COMMAND_MOVE_CHUNKLOADER,
    TC_WORLD_UPDATER_COMMAND_PLACE_BLOCK,
    TC_WORLD_UPDATER_COMMAND_STOP,
    TC_WORLD_UPDATER_COMMAND_ADD_WORLD,
    TC_WORLD_UPDATER_COMMAND_ADD_CHUNKLOADER,
    TC_WORLD_UPDATER_COMMAND_DELETE_CHUNKLOADER,
    TC_WORLD_UPDATER_COMMAND_GET_WORLD,
    TC_WORLD_UPDATER_COMMAND_GET_CHUNKLOADER,
    TC_WORLD_UPDATER_COMMAND_GET_CHUNKLIST
    
} tc_world_update_command_e;

struct tc_world_updater_command
{
    tc_world_updater_command_s             *next;
    tc_world_updater_command_s             *previous;
    
    tc_world_update_command_e               type;
    
    union command
    {
        struct move_chunkloader_command
        {
            u32_t                                   loader_id;
            tc_chunk_location_s                     new_location;
        } move_chunkloader;
        
        struct place_block_command
        {
            tc_block_s                              block;
            tc_block_location_s                     location;
            
        } place_block;
        
        struct get_item
        {
            u32_t                                   index;
            u32_t                                   promise;
            
        } get_item;
        
    } specific;
    
    bool_t                                  is_used;
};

struct tc_world_updater_queue
{
    tc_world_updater_command_s             *first;
    tc_world_updater_command_s             *last;
    bool_t                                  in_action;
    
    u32_t                                   capacity;
    tc_world_updater_command_s             *commands;
};

void                                tc_worldupdate_initialize_promises  ();
tc_world_updater_queue_s            tc_new_world_updater_queue          (u32_t capacity);
bool_t                              tc_issue_world_updater_command      (
    tc_world_updater_queue_s *queue, tc_world_updater_command_s command
);

tc_world_updater_command_s          tc_world_updater_query_next_command
    (tc_world_updater_queue_s *queue);


tc_promise_s                        tc_worldupdate_reserve_world_promise            ();
tc_promise_s                        tc_worldupdate_reserve_chunkloader_promise      ();
tc_promise_s                        tc_worldupdate_reserve_chunklist_promise        ();

void                                tc_worldupate_set_world_promise         (u32_t identifier, tc_world_s *world);
void                                tc_worldupate_set_chunkloader_promise   (u32_t identifier, tc_chunkloader_s *chunkloader);
void                                tc_worldupate_set_chunklist_promise     (u32_t identifier, tc_chunklist_s *chunklist);

tc_world_updater_queue_s            tc_new_world_updater_queue
    (u32_t capacity);

void                                tc_worldupdater_execute_move_chunkloader    (tc_world_updater_command_s command);
void                                tc_worldupdater_execute_place_block         (tc_world_updater_command_s command);
void                                tc_worldupdater_execute_stop                (tc_world_updater_command_s command);
void                                tc_worldupdater_execute_add_world           (tc_world_updater_command_s command);
void                                tc_worldupdater_execute_add_chunkloader     (tc_world_updater_command_s command);
void                                tc_worldupdater_execute_delete_chunkloader  (tc_world_updater_command_s command);
void                                tc_worldupdater_execute_get_world           (tc_world_updater_command_s command);
void                                tc_worldupdater_execute_get_chunkloader     (tc_world_updater_command_s command);
void                                tc_worldupdater_execute_get_chunklist       (tc_world_updater_command_s command);

#endif // TC_WORLD_UPDATER_INTERNAL_H