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#pragma once

#include <functional>

#include "openvic-simulation/country/CountryInstance.hpp"
#include "openvic-simulation/diplomacy/CountryRelation.hpp"
#include "openvic-simulation/economy/GoodInstance.hpp"
#include "openvic-simulation/map/MapInstance.hpp"
#include "openvic-simulation/map/Mapmode.hpp"
#include "openvic-simulation/military/UnitInstance.hpp"
#include "openvic-simulation/misc/SimulationClock.hpp"
#include "openvic-simulation/types/Date.hpp"

namespace OpenVic {
   struct DefinitionManager;
   struct Bookmark;

   struct InstanceManager {
      using gamestate_updated_func_t = std::function<void()>;

   private:
      DefinitionManager const& PROPERTY(definition_manager);

      CountryInstanceManager PROPERTY_REF(country_instance_manager);
      CountryRelationManager PROPERTY_REF(country_relation_manager);
      GoodInstanceManager PROPERTY_REF(good_instance_manager);
      UnitInstanceManager PROPERTY_REF(unit_instance_manager);
      /* Near the end so it is freed after other managers that may depend on it,
       * e.g. if we want to remove military units from the province they're in when they're destructed. */
      MapInstance PROPERTY_REF(map_instance);
      SimulationClock PROPERTY_REF(simulation_clock);

      bool PROPERTY_CUSTOM_PREFIX(game_instance_setup, is);
      bool PROPERTY_CUSTOM_PREFIX(game_session_started, is);

   public:
      inline constexpr bool is_bookmark_loaded() const {
         return bookmark != nullptr;
      }

   private:
      time_t session_start; /* SS-54, as well as allowing time-tracking */
      Bookmark const* PROPERTY(bookmark);
      Date PROPERTY(today);
      gamestate_updated_func_t gamestate_updated;
      bool gamestate_needs_update, currently_updating_gamestate;

      void set_gamestate_needs_update();
      void update_gamestate();
      void tick();

   public:
      InstanceManager(
         DefinitionManager const& new_definition_manager, gamestate_updated_func_t gamestate_updated_callback,
         SimulationClock::state_changed_function_t clock_state_changed_callback
      );

      bool setup();
      bool load_bookmark(Bookmark const* new_bookmark);
      bool start_game_session();

      bool expand_selected_province_building(size_t building_index);
   };
}