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path: root/extension/src/openvic-extension/singletons/GameSingleton.cpp
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#include "GameSingleton.hpp"

#include <functional>

#include <godot_cpp/core/class_db.hpp>
#include <godot_cpp/core/error_macros.hpp>
#include <godot_cpp/variant/utility_functions.hpp>

#include <openvic-simulation/utility/Logger.hpp>

#include "godot_cpp/variant/dictionary.hpp"
#include "openvic-extension/classes/GFXPieChartTexture.hpp"
#include "openvic-extension/singletons/AssetManager.hpp"
#include "openvic-extension/singletons/LoadLocalisation.hpp"
#include "openvic-extension/utility/ClassBindings.hpp"
#include "openvic-extension/utility/Utilities.hpp"
#include "openvic-simulation/research/Technology.hpp"

using namespace godot;
using namespace OpenVic;

using OpenVic::Utilities::godot_to_std_string;
using OpenVic::Utilities::std_to_godot_string;
using OpenVic::Utilities::std_to_godot_string_name;
using OpenVic::Utilities::std_view_to_godot_string;

/* Maximum width or height a GPU texture can have. */
static constexpr int32_t GPU_DIM_LIMIT = 0x3FFF;

/* StringNames cannot be constructed until Godot has called StringName::setup(),
 * so we must use these wrapper functions to delay their initialisation. */
StringName const& GameSingleton::_signal_gamestate_updated() {
   static const StringName signal_gamestate_updated = "gamestate_updated";
   return signal_gamestate_updated;
}
StringName const& GameSingleton::_signal_province_selected() {
   static const StringName signal_province_selected = "province_selected";
   return signal_province_selected;
}
StringName const& GameSingleton::_signal_clock_state_changed() {
   static const StringName signal_clock_state_changed = "clock_state_changed";
   return signal_clock_state_changed;
}

void GameSingleton::_bind_methods() {
   OV_BIND_SMETHOD(setup_logger);

   OV_BIND_METHOD(GameSingleton::load_defines_compatibility_mode, { "file_paths" });
   OV_BIND_SMETHOD(search_for_game_path, { "hint_path" }, DEFVAL(String {}));

   OV_BIND_METHOD(GameSingleton::setup_game, { "bookmark_index" });

   OV_BIND_METHOD(GameSingleton::get_province_index_from_uv_coords, { "coords" });
   OV_BIND_METHOD(GameSingleton::get_province_info_from_index, { "index" });

   OV_BIND_METHOD(GameSingleton::get_map_width);
   OV_BIND_METHOD(GameSingleton::get_map_height);
   OV_BIND_METHOD(GameSingleton::get_map_aspect_ratio);
   OV_BIND_METHOD(GameSingleton::get_terrain_texture);
   OV_BIND_METHOD(GameSingleton::get_province_shape_image_subdivisions);
   OV_BIND_METHOD(GameSingleton::get_province_shape_texture);
   OV_BIND_METHOD(GameSingleton::get_province_colour_texture);

   OV_BIND_METHOD(GameSingleton::get_mapmode_count);
   OV_BIND_METHOD(GameSingleton::get_mapmode_identifier);
   OV_BIND_METHOD(GameSingleton::set_mapmode, { "identifier" });
   OV_BIND_METHOD(GameSingleton::is_parchment_mapmode_allowed);
   OV_BIND_METHOD(GameSingleton::get_selected_province_index);
   OV_BIND_METHOD(GameSingleton::set_selected_province, { "index" });

   OV_BIND_METHOD(GameSingleton::get_province_building_count);
   OV_BIND_METHOD(GameSingleton::get_province_building_identifier, { "building_index" });
   OV_BIND_METHOD(GameSingleton::expand_selected_province_building, { "building_index" });
   OV_BIND_METHOD(GameSingleton::get_slave_pop_icon_index);
   OV_BIND_METHOD(GameSingleton::get_administrative_pop_icon_index);
   OV_BIND_METHOD(GameSingleton::get_rgo_owner_pop_icon_index);
   OV_BIND_METHOD(GameSingleton::get_tech_folders);
   OV_BIND_METHOD(GameSingleton::get_tech_areas);
   OV_BIND_METHOD(GameSingleton::get_technologies);

   OV_BIND_METHOD(GameSingleton::set_paused, { "paused" });
   OV_BIND_METHOD(GameSingleton::toggle_paused);
   OV_BIND_METHOD(GameSingleton::is_paused);
   OV_BIND_METHOD(GameSingleton::increase_speed);
   OV_BIND_METHOD(GameSingleton::decrease_speed);
   OV_BIND_METHOD(GameSingleton::get_speed);
   OV_BIND_METHOD(GameSingleton::can_increase_speed);
   OV_BIND_METHOD(GameSingleton::can_decrease_speed);
   OV_BIND_METHOD(GameSingleton::get_longform_date);
   OV_BIND_METHOD(GameSingleton::try_tick);

   ADD_SIGNAL(MethodInfo(_signal_gamestate_updated()));
   ADD_SIGNAL(MethodInfo(_signal_province_selected(), PropertyInfo(Variant::INT, "index")));
   ADD_SIGNAL(MethodInfo(_signal_clock_state_changed()));
}

GameSingleton* GameSingleton::get_singleton() {
   return singleton;
}

void GameSingleton::_on_gamestate_updated() {
   _update_colour_image();
   emit_signal(_signal_gamestate_updated());
}

void GameSingleton::_on_clock_state_changed() {
   emit_signal(_signal_clock_state_changed());
}

/* REQUIREMENTS:
 * MAP-21, MAP-23, MAP-25, MAP-32, MAP-33, MAP-34
 */
GameSingleton::GameSingleton()
   : game_manager {
      std::bind(&GameSingleton::_on_gamestate_updated, this), std::bind(&GameSingleton::_on_clock_state_changed, this)
   } {
   ERR_FAIL_COND(singleton != nullptr);
   singleton = this;
}
GameSingleton::~GameSingleton() {
   ERR_FAIL_COND(singleton != this);
   singleton = nullptr;
}

void GameSingleton::setup_logger() {
   Logger::set_info_func([](std::string&& str) {
      UtilityFunctions::print(std_to_godot_string(str));
   });
   Logger::set_warning_func([](std::string&& str) {
      UtilityFunctions::push_warning(std_to_godot_string(str));
   });
   Logger::set_error_func([](std::string&& str) {
      UtilityFunctions::push_error(std_to_godot_string(str));
   });
}

GameManager const& GameSingleton::get_game_manager() const {
   return game_manager;
}

Dataloader const& GameSingleton::get_dataloader() const {
   return dataloader;
}

Error GameSingleton::setup_game(int32_t bookmark_index) {
   Bookmark const* bookmark = game_manager.get_history_manager().get_bookmark_manager().get_bookmark_by_index(bookmark_index);
   ERR_FAIL_NULL_V_MSG(bookmark, FAILED, vformat("Failed to get bookmark with index: %d", bookmark_index));
   bool ret = game_manager.load_bookmark(bookmark);
   for (Province& province : game_manager.get_map().get_provinces()) {
      province.set_crime(
         game_manager.get_crime_manager().get_crime_modifier_by_index(
            (province.get_index() - 1) % game_manager.get_crime_manager().get_crime_modifier_count()
         )
      );
   }
   return ERR(ret);
}

int32_t GameSingleton::get_province_index_from_uv_coords(Vector2 const& coords) const {
   const size_t x_mod_w = UtilityFunctions::fposmod(coords.x, 1.0f) * get_map_width();
   const size_t y_mod_h = UtilityFunctions::fposmod(coords.y, 1.0f) * get_map_height();
   return game_manager.get_map().get_province_index_at(x_mod_w, y_mod_h);
}

Dictionary GameSingleton::get_province_info_from_index(int32_t index) const {
   static const StringName province_info_province_key = "province";
   static const StringName province_info_region_key = "region";
   static const StringName province_info_slave_status_key = "slave_status";
   static const StringName province_info_colony_status_key = "colony_status";
   static const StringName province_info_terrain_type_key = "terrain_type";
   static const StringName province_info_life_rating_key = "life_rating";
   static const StringName province_info_controller_key = "controller";
   static const StringName province_info_rgo_name_key = "rgo_name";
   static const StringName province_info_rgo_icon_key = "rgo_icon";
   static const StringName province_info_crime_name_key = "crime_name";
   static const StringName province_info_crime_icon_key = "crime_icon";
   static const StringName province_info_total_population_key = "total_population";
   static const StringName province_info_pop_types_key = "pop_types";
   static const StringName province_info_pop_ideologies_key = "pop_ideologies";
   static const StringName province_info_pop_cultures_key = "pop_cultures";
   static const StringName province_info_cores_key = "cores";
   static const StringName province_info_buildings_key = "buildings";

   Province const* province = game_manager.get_map().get_province_by_index(index);
   if (province == nullptr) {
      return {};
   }
   Dictionary ret;

   ret[province_info_province_key] = std_view_to_godot_string(province->get_identifier());

   Region const* region = province->get_region();
   if (region != nullptr) {
      ret[province_info_region_key] = std_view_to_godot_string(region->get_identifier());
   }

   ret[province_info_slave_status_key] = province->get_slave();

   ret[province_info_colony_status_key] = static_cast<int32_t>(province->get_colony_status());

   TerrainType const* terrain_type = province->get_terrain_type();
   if (terrain_type != nullptr) {
      ret[province_info_terrain_type_key] = std_view_to_godot_string(terrain_type->get_identifier());
   }

   ret[province_info_life_rating_key] = province->get_life_rating();

   Country const* controller = province->get_controller();
   if (controller != nullptr) {
      ret[province_info_controller_key] = std_view_to_godot_string(controller->get_identifier());
   }

   Good const* rgo = province->get_rgo();
   if (rgo != nullptr) {
      ret[province_info_rgo_name_key] = std_view_to_godot_string(rgo->get_identifier());
      ret[province_info_rgo_icon_key] = static_cast<int32_t>(rgo->get_index());
   }

   Crime const* crime = province->get_crime();
   if (crime != nullptr) {
      ret[province_info_crime_name_key] = std_view_to_godot_string(crime->get_identifier());
      ret[province_info_crime_icon_key] = static_cast<int32_t>(crime->get_icon());
   }

   ret[province_info_total_population_key] = province->get_total_population();

   fixed_point_map_t<PopType const*> const& pop_types = province->get_pop_type_distribution();
   if (!pop_types.empty()) {
      ret[province_info_pop_types_key] = GFXPieChartTexture::distribution_to_slices_array(pop_types);
   }

   fixed_point_map_t<Ideology const*> const& ideologies = province->get_ideology_distribution();
   if (!ideologies.empty()) {
      ret[province_info_pop_ideologies_key] = GFXPieChartTexture::distribution_to_slices_array(ideologies);
   }

   fixed_point_map_t<Culture const*> const& cultures = province->get_culture_distribution();
   if (!cultures.empty()) {
      ret[province_info_pop_cultures_key] = GFXPieChartTexture::distribution_to_slices_array(cultures);
   }

   std::vector<Country const*> const& cores = province->get_cores();
   if (!cores.empty()) {
      PackedStringArray cores_array;
      cores_array.resize(cores.size());
      for (size_t idx = 0; idx < cores.size(); ++idx) {
         cores_array[idx] = std_view_to_godot_string(cores[idx]->get_identifier());
      }
      ret[province_info_cores_key] = cores_array;
   }

   static const StringName building_info_level_key = "level";
   static const StringName building_info_expansion_state_key = "expansion_state";
   static const StringName building_info_start_date_key = "start_date";
   static const StringName building_info_end_date_key = "end_date";
   static const StringName building_info_expansion_progress_key = "expansion_progress";

   std::vector<BuildingInstance> const& buildings = province->get_buildings();
   if (!buildings.empty()) {
      /* This system relies on the province buildings all being present in the right order. It will have to
       * be changed if we want to support variable combinations and permutations of province buildings. */
      TypedArray<Dictionary> buildings_array;
      buildings_array.resize(buildings.size());
      for (size_t idx = 0; idx < buildings.size(); ++idx) {
         BuildingInstance const& building = buildings[idx];

         Dictionary building_dict;
         building_dict[building_info_level_key] = static_cast<int32_t>(building.get_level());
         building_dict[building_info_expansion_state_key] = static_cast<int32_t>(building.get_expansion_state());
         building_dict[building_info_start_date_key] = std_to_godot_string(building.get_start_date().to_string());
         building_dict[building_info_end_date_key] = std_to_godot_string(building.get_end_date().to_string());
         building_dict[building_info_expansion_progress_key] = building.get_expansion_progress();

         buildings_array[idx] = building_dict;
      }
      ret[province_info_buildings_key] = buildings_array;
   }
   return ret;
}

int32_t GameSingleton::get_map_width() const {
   return game_manager.get_map().get_width();
}

int32_t GameSingleton::get_map_height() const {
   return game_manager.get_map().get_height();
}

float GameSingleton::get_map_aspect_ratio() const {
   return static_cast<float>(get_map_width()) / static_cast<float>(get_map_height());
}

Ref<Texture2DArray> GameSingleton::get_terrain_texture() const {
   return terrain_texture;
}

Ref<Image> GameSingleton::get_flag_image(Country const* country, StringName const& flag_type) const {
   ERR_FAIL_NULL_V(country, nullptr);
   const typename decltype(flag_image_map)::const_iterator it = flag_image_map.find(country);
   ERR_FAIL_COND_V_MSG(
      it == flag_image_map.end(), nullptr,
      vformat("Failed to find flags for country: %s", std_view_to_godot_string(country->get_identifier()))
   );
   const typename decltype(it->second)::const_iterator it2 = it->second.find(flag_type);
   ERR_FAIL_COND_V_MSG(
      it2 == it->second.end(), nullptr,
      vformat("Failed to find %s flag for country: %s", flag_type, std_view_to_godot_string(country->get_identifier()))
   );
   return it2->second;
}

Vector2i GameSingleton::get_province_shape_image_subdivisions() const {
   return image_subdivisions;
}

Ref<Texture2DArray> GameSingleton::get_province_shape_texture() const {
   return province_shape_texture;
}

Ref<ImageTexture> GameSingleton::get_province_colour_texture() const {
   return province_colour_texture;
}

Error GameSingleton::_update_colour_image() {
   Map const& map = game_manager.get_map();
   ERR_FAIL_COND_V_MSG(
      !map.provinces_are_locked(), FAILED, "Cannot generate province colour image before provinces are locked!"
   );

   /* We reshape the list of colours into a square, as each texture dimensions cannot exceed 16384. */
   static constexpr int32_t PROVINCE_INDEX_SQRT = 1 << (sizeof(Province::index_t) * CHAR_BIT / 2);
   static constexpr int32_t colour_image_width = PROVINCE_INDEX_SQRT * sizeof(Mapmode::base_stripe_t) / sizeof(colour_argb_t);
   /* Province count + null province, rounded up to next multiple of PROVINCE_INDEX_SQRT.
    * Rearranged from: (map.get_province_count() + 1) + (PROVINCE_INDEX_SQRT - 1) */
   static const int32_t colour_image_height = (map.get_province_count() + PROVINCE_INDEX_SQRT) / PROVINCE_INDEX_SQRT;

   static PackedByteArray colour_data_array;
   static const int64_t colour_data_array_size = colour_image_width * colour_image_height * sizeof(colour_argb_t);
   colour_data_array.resize(colour_data_array_size);

   Error err = OK;
   if (!map.generate_mapmode_colours(mapmode_index, colour_data_array.ptrw())) {
      err = FAILED;
   }

   if (province_colour_image.is_null()) {
      province_colour_image.instantiate();
      ERR_FAIL_NULL_V_EDMSG(province_colour_image, FAILED, "Failed to create province colour image");
   }
   /* Width is doubled as each province has a (base, stripe) colour pair. */
   province_colour_image->set_data(
      colour_image_width, colour_image_height, false, Image::FORMAT_RGBA8, colour_data_array
   );
   if (province_colour_texture.is_null()) {
      province_colour_texture = ImageTexture::create_from_image(province_colour_image);
      ERR_FAIL_NULL_V_EDMSG(province_colour_texture, FAILED, "Failed to create province colour texture");
   } else {
      province_colour_texture->update(province_colour_image);
   }
   return err;
}

int32_t GameSingleton::get_mapmode_count() const {
   return game_manager.get_map().get_mapmode_count();
}

String GameSingleton::get_mapmode_identifier(int32_t index) const {
   Mapmode const* mapmode = game_manager.get_map().get_mapmode_by_index(index);
   if (mapmode != nullptr) {
      return std_view_to_godot_string(mapmode->get_identifier());
   }
   return String {};
}

Error GameSingleton::set_mapmode(String const& identifier) {
   Mapmode const* mapmode = game_manager.get_map().get_mapmode_by_identifier(godot_to_std_string(identifier));
   ERR_FAIL_NULL_V_MSG(mapmode, FAILED, vformat("Failed to find mapmode with identifier: %s", identifier));
   mapmode_index = mapmode->get_index();
   return _update_colour_image();
}

bool GameSingleton::is_parchment_mapmode_allowed() const {
   // TODO - parchment bool per mapmode?
   // TODO - move mapmode index to SIM/Map?
   /* Disallows parchment mapmode for the cosmetic terrain mapmode */
   static constexpr std::string_view cosmetic_terrain_mapmode = "mapmode_terrain";
   Mapmode const* mapmode = game_manager.get_map().get_mapmode_by_index(mapmode_index);
   return mapmode != nullptr && mapmode->get_identifier() != cosmetic_terrain_mapmode;
}

int32_t GameSingleton::get_selected_province_index() const {
   return game_manager.get_map().get_selected_province_index();
}

void GameSingleton::set_selected_province(int32_t index) {
   game_manager.get_map().set_selected_province(index);
   _update_colour_image();
   emit_signal(_signal_province_selected(), index);
}

int32_t GameSingleton::get_province_building_count() const {
   return game_manager.get_economy_manager().get_building_type_manager().get_province_building_types().size();
}

String GameSingleton::get_province_building_identifier(int32_t index) const {
   std::vector<BuildingType const*> const& province_building_types =
      game_manager.get_economy_manager().get_building_type_manager().get_province_building_types();
   ERR_FAIL_COND_V_MSG(
      index < 0 || index >= province_building_types.size(), {}, vformat("Invalid province building index: %d", index)
   );
   return std_view_to_godot_string(province_building_types[index]->get_identifier());
}

Error GameSingleton::expand_selected_province_building(int32_t building_index) {
   ERR_FAIL_COND_V_MSG(
      !game_manager.expand_selected_province_building(building_index), FAILED,
      vformat("Failed to expand the currently selected province's building index %d", building_index)
   );
   return OK;
}

int32_t GameSingleton::get_slave_pop_icon_index() const {
   const PopType::sprite_t sprite = game_manager.get_pop_manager().get_slave_sprite();
   ERR_FAIL_COND_V_MSG(sprite <= 0, 0, "Slave sprite unset!");
   return sprite;
}

int32_t GameSingleton::get_administrative_pop_icon_index() const {
   const PopType::sprite_t sprite = game_manager.get_pop_manager().get_administrative_sprite();
   ERR_FAIL_COND_V_MSG(sprite <= 0, 0, "Administrative sprite unset!");
   return sprite;
}

int32_t GameSingleton::get_rgo_owner_pop_icon_index() const {
   const PopType::sprite_t sprite = game_manager.get_economy_manager().get_production_type_manager().get_rgo_owner_sprite();
   ERR_FAIL_COND_V_MSG(sprite <= 0, 0, "RGO owner sprite unset!");
   return sprite;
}

Dictionary GameSingleton::get_tech_folders() const{
   std::vector<TechnologyFolder> const& fetched_folders = game_manager.get_research_manager().get_technology_manager().get_technology_folders();
   static const StringName technology_folder_identifier_key = "identifier";

   Dictionary folders;
   for (size_t i = 0; i < fetched_folders.size(); i++) {
      Dictionary folder;
      folder[technology_folder_identifier_key] = std_to_godot_string(std::string(fetched_folders[i].get_identifier()));
      folders[i] = folder;
   }
   return folders;
}

Dictionary GameSingleton::get_tech_areas() const{
   std::vector<TechnologyArea> const& fetched_areas = game_manager.get_research_manager().get_technology_manager().get_technology_areas();
   static const StringName technology_area_identifier_key = "identifier";
   static const StringName technology_area_folder_key = "folder";
   
   Dictionary areas;
   for (size_t i = 0; i < fetched_areas.size(); i++) {
      Dictionary area;
      area[technology_area_identifier_key] = std_to_godot_string(std::string(fetched_areas[i].get_identifier()));
      area[technology_area_folder_key] = std_to_godot_string(std::string(fetched_areas[i].get_folder().get_identifier()));
      areas[i] = area;
   }
   return areas;
}

Dictionary GameSingleton::get_technologies() const{
   std::vector<Technology> const& fetched_technologies = game_manager.get_research_manager().get_technology_manager().get_technologies();
   static const StringName technology_info_identifier_key = "identifier";
   static const StringName technology_info_area_key = "area";
   static const StringName technology_info_year_key = "year";
   static const StringName technology_info_cost_key = "cost";
   static const StringName technology_info_unit_key = "unit";
   static const StringName technology_info_activated_unit_key = "activated_units";
   static const StringName technology_info_activated_buildings_key = "activated_buildings";
   static const StringName technology_info_ai_chance_key = "ai_chance";
   Dictionary techs;
   for (size_t i = 0; i < fetched_technologies.size(); i++) {
      Dictionary tech;
      tech[technology_info_identifier_key] = std_to_godot_string(std::string(fetched_technologies[i].get_identifier()));
      tech[technology_info_area_key] = std_to_godot_string(std::string(fetched_technologies[i].get_area().get_identifier()));
      tech[technology_info_year_key] = static_cast<int32_t>(fetched_technologies[i].get_year());
      tech[technology_info_cost_key] = static_cast<int32_t>(fetched_technologies[i].get_cost());
      tech[technology_info_unit_key] = std_to_godot_string("WIP");
      tech[technology_info_activated_unit_key] = std_to_godot_string("WIP");
      tech[technology_info_activated_buildings_key] = std_to_godot_string("WIP");
      tech[technology_info_ai_chance_key] = std_to_godot_string("WIP");
      techs[i] = tech;
   }
   return techs;
}


void GameSingleton::set_paused(bool paused) {
   game_manager.get_simulation_clock().set_paused(paused);
}

void GameSingleton::toggle_paused() {
   game_manager.get_simulation_clock().toggle_paused();
}

bool GameSingleton::is_paused() const {
   return game_manager.get_simulation_clock().is_paused();
}

void GameSingleton::increase_speed() {
   game_manager.get_simulation_clock().increase_simulation_speed();
}

void GameSingleton::decrease_speed() {
   game_manager.get_simulation_clock().decrease_simulation_speed();
}

int32_t GameSingleton::get_speed() const {
   return game_manager.get_simulation_clock().get_simulation_speed();
}

bool GameSingleton::can_increase_speed() const {
   return game_manager.get_simulation_clock().can_increase_simulation_speed();
}

bool GameSingleton::can_decrease_speed() const {
   return game_manager.get_simulation_clock().can_decrease_simulation_speed();
}

String GameSingleton::get_longform_date() const {
   return Utilities::date_to_formatted_string(game_manager.get_today());
}

void GameSingleton::try_tick() {
   game_manager.get_simulation_clock().conditionally_advance_game();
}

Error GameSingleton::_load_map_images() {
   ERR_FAIL_COND_V_MSG(province_shape_texture.is_valid(), FAILED, "Map images have already been loaded!");

   Error err = OK;

   const Vector2i province_dims {
      static_cast<int32_t>(game_manager.get_map().get_width()),
      static_cast<int32_t>(game_manager.get_map().get_height())
   };

   // For each dimension of the image, this finds the small number of equal subdivisions
   // required get the individual texture dims under GPU_DIM_LIMIT
   for (int i = 0; i < 2; ++i) {
      image_subdivisions[i] = 1;
      while (province_dims[i] / image_subdivisions[i] > GPU_DIM_LIMIT || province_dims[i] % image_subdivisions[i] != 0) {
         ++image_subdivisions[i];
      }
   }

   Map::shape_pixel_t const* province_shape_data = game_manager.get_map().get_province_shape_image().data();
   const Vector2i divided_dims = province_dims / image_subdivisions;
   TypedArray<Image> province_shape_images;
   province_shape_images.resize(image_subdivisions.x * image_subdivisions.y);
   for (int32_t v = 0; v < image_subdivisions.y; ++v) {
      for (int32_t u = 0; u < image_subdivisions.x; ++u) {
         PackedByteArray index_data_array;
         index_data_array.resize(divided_dims.x * divided_dims.y * sizeof(Map::shape_pixel_t));

         for (int32_t y = 0; y < divided_dims.y; ++y) {
            memcpy(
               index_data_array.ptrw() + y * divided_dims.x * sizeof(Map::shape_pixel_t),
               province_shape_data + (v * divided_dims.y + y) * province_dims.x + u * divided_dims.x,
               divided_dims.x * sizeof(Map::shape_pixel_t)
            );
         }

         const Ref<Image> province_shape_subimage =
            Image::create_from_data(divided_dims.x, divided_dims.y, false, Image::FORMAT_RGB8, index_data_array);
         if (province_shape_subimage.is_null()) {
            UtilityFunctions::push_error("Failed to create province shape image (", u, ", ", v, ")");
            err = FAILED;
         }
         province_shape_images[u + v * image_subdivisions.x] = province_shape_subimage;
      }
   }

   province_shape_texture.instantiate();
   if (province_shape_texture->create_from_images(province_shape_images) != OK) {
      UtilityFunctions::push_error("Failed to create terrain texture array!");
      err = FAILED;
   }

   if (_update_colour_image() != OK) {
      err = FAILED;
   }

   return err;
}

Error GameSingleton::_load_terrain_variants() {
   ERR_FAIL_COND_V_MSG(terrain_texture.is_valid(), FAILED, "Terrain variants have already been loaded!");

   static const StringName terrain_texturesheet_path = "map/terrain/texturesheet.tga";

   AssetManager* asset_manager = AssetManager::get_singleton();
   ERR_FAIL_NULL_V(asset_manager, FAILED);
   // Load the terrain texture sheet and prepare to slice it up
   Ref<Image> terrain_sheet = asset_manager->get_image(terrain_texturesheet_path);
   ERR_FAIL_NULL_V_MSG(terrain_sheet, FAILED, vformat("Failed to load terrain texture sheet: %s", terrain_texturesheet_path));

   static constexpr int32_t SHEET_DIMS = 8, SHEET_SIZE = SHEET_DIMS * SHEET_DIMS;

   const int32_t sheet_width = terrain_sheet->get_width(), sheet_height = terrain_sheet->get_height();
   ERR_FAIL_COND_V_MSG(
      sheet_width < 1 || sheet_width % SHEET_DIMS != 0 || sheet_width != sheet_height, FAILED, vformat(
         "Invalid terrain texture sheet dims: %dx%d (must be square with dims positive multiples of %d)",
         sheet_width, sheet_height, SHEET_DIMS
      )
   );
   const int32_t slice_size = sheet_width / SHEET_DIMS;

   TypedArray<Image> terrain_images;
   {
      /* This is a placeholder image so that we don't have to branch to avoid looking up terrain index 0 (water).
       * It should never appear in game, and so is bright red to to make it obvious if it slips through. */
      const Ref<Image> water_image = Utilities::make_solid_colour_image(
         { 1.0f, 0.0f, 0.0f }, slice_size, slice_size, terrain_sheet->get_format()
      );
      ERR_FAIL_NULL_V_EDMSG(water_image, FAILED, "Failed to create water terrain image");
      terrain_images.append(water_image);
   }
   Error err = OK;
   for (int32_t idx = 0; idx < SHEET_SIZE; ++idx) {
      const Rect2i slice { idx % SHEET_DIMS * slice_size, idx / SHEET_DIMS * slice_size, slice_size, slice_size };
      const Ref<Image> terrain_image = terrain_sheet->get_region(slice);
      if (terrain_image.is_null() || terrain_image->is_empty()) {
         UtilityFunctions::push_error(
            "Failed to extract terrain texture slice ", slice, " from ", terrain_texturesheet_path
         );
         err = FAILED;
      }
      terrain_images.append(terrain_image);
   }

   terrain_texture.instantiate();
   ERR_FAIL_COND_V_MSG(
      terrain_texture->create_from_images(terrain_images) != OK, FAILED, "Failed to create terrain texture array!"
   );
   return err;
}

Error GameSingleton::_load_flag_images() {
   ERR_FAIL_COND_V_MSG(!flag_image_map.empty(), FAILED, "Flag images have already been loaded!");

   GovernmentTypeManager const& government_type_manager = game_manager.get_politics_manager().get_government_type_manager();
   ERR_FAIL_COND_V_MSG(
      !government_type_manager.government_types_are_locked(), FAILED,
      "Cannot load flag images before government types are locked!"
   );
   CountryManager const& country_manager = game_manager.get_country_manager();
   ERR_FAIL_COND_V_MSG(
      !country_manager.countries_are_locked(), FAILED, "Cannot load flag images before countries are locked!"
   );

   AssetManager* asset_manager = AssetManager::get_singleton();
   ERR_FAIL_NULL_V(asset_manager, FAILED);

   static const String flag_directory = "gfx/flags/";
   static const String flag_separator = "_";
   static const String flag_extension = ".tga";

   std::vector<StringName> flag_types;
   for (std::string const& type : government_type_manager.get_flag_types()) {
      flag_types.emplace_back(std_to_godot_string_name(type));
   }

   flag_image_map.reserve(country_manager.get_countries().size());

   Error ret = OK;
   for (Country const& country : country_manager.get_countries()) {
      ordered_map<StringName, Ref<Image>>& flag_images = flag_image_map[&country];
      flag_images.reserve(flag_types.size());
      const String country_name = std_view_to_godot_string(country.get_identifier());
      for (StringName const& flag_type : flag_types) {
         const StringName flag_path =
            flag_directory + country_name + (flag_type.is_empty() ? "" : flag_separator + flag_type) + flag_extension;
         const Ref<Image> flag_image = asset_manager->get_image(flag_path);
         if (flag_image.is_valid()) {
            flag_images.emplace(flag_type, flag_image);
         } else {
            UtilityFunctions::push_error("Failed to load flag image: ", flag_path);
            ret = FAILED;
         }
      }
   }
   return ret;
}

Error GameSingleton::load_defines_compatibility_mode(PackedStringArray const& file_paths) {
   Dataloader::path_vector_t roots;
   for (String const& path : file_paths) {
      roots.push_back(godot_to_std_string(path));
   }

   Error err = OK;

   if (!dataloader.set_roots(roots)) {
      Logger::error("Failed to set dataloader roots!");
      err = FAILED;
   }
   if (!dataloader.load_defines(game_manager)) {
      UtilityFunctions::push_error("Failed to load defines!");
      err = FAILED;
   }
   if (_load_terrain_variants() != OK) {
      UtilityFunctions::push_error("Failed to load terrain variants!");
      err = FAILED;
   }
   if (_load_flag_images() != OK) {
      UtilityFunctions::push_error("Failed to load flag textures!");
      err = FAILED;
   }
   if (_load_map_images() != OK) {
      UtilityFunctions::push_error("Failed to load map images!");
      err = FAILED;
   }
   if (!game_manager.load_hardcoded_defines()) {
      UtilityFunctions::push_error("Failed to hardcoded defines!");
      err = FAILED;
   }
   auto add_message = std::bind_front(&LoadLocalisation::add_message, LoadLocalisation::get_singleton());
   if (!dataloader.load_localisation_files(add_message)) {
      UtilityFunctions::push_error("Failed to load localisation!");
      err = FAILED;
   }

   return err;
}

String GameSingleton::search_for_game_path(String const& hint_path) {
   return std_to_godot_string(Dataloader::search_for_game_path(godot_to_std_string(hint_path)).string());
}