path: root/extension/src/openvic2/map/Map.cpp

#include "openvic2/map/Map.hpp"

#include <cassert>
#include <unordered_set>

#include "openvic2/Logger.hpp"

using namespace OpenVic2;

Mapmode::Mapmode(index_t new_index, std::string const& new_identifier, colour_func_t new_colour_func)
   : HasIdentifier{ new_identifier }, index{ new_index }, colour_func{ new_colour_func } {
   assert(colour_func != nullptr);
}

Mapmode::index_t Mapmode::get_index() const {
   return index;
}

colour_t Mapmode::get_colour(Map const& map, Province const& province) const {
   return colour_func ? colour_func(map, province) : NULL_COLOUR;
}

Map::Map() : provinces{ "provinces" }, regions{ "regions" }, mapmodes{ "mapmodes" } {}

return_t Map::add_province(std::string const& identifier, colour_t colour) {
   if (provinces.get_item_count() >= MAX_INDEX) {
      Logger::error("The map's province list is full - there can be at most ", MAX_INDEX, " provinces");
      return FAILURE;
   }
   if (identifier.empty()) {
      Logger::error("Invalid province identifier - empty!");
      return FAILURE;
   }
   if (colour == NULL_COLOUR || colour > MAX_COLOUR) {
      Logger::error("Invalid province colour: ", Province::colour_to_hex_string(colour));
      return FAILURE;
   }
   Province new_province{ static_cast<index_t>(provinces.get_item_count() + 1), identifier, colour };
   Province const* old_province = get_province_by_colour(colour);
   if (old_province != nullptr) {
      Logger::error("Duplicate province colours: ", old_province->to_string(), " and ", new_province.to_string());
      return FAILURE;
   }
   return provinces.add_item(std::move(new_province));
}

void Map::lock_provinces() {
   provinces.lock();
}

return_t Map::set_water_province(std::string const& identifier) {
   if (water_provinces_locked) {
      Logger::error("The map's water provinces have already been locked!");
      return FAILURE;
   }
   Province* province = get_province_by_identifier(identifier);
   if (province == nullptr) {
      Logger::error("Unrecognised water province identifier: ", identifier);
      return FAILURE;
   }
   if (province->is_water()) {
      Logger::error("Province ", identifier, " is already a water province!");
      return FAILURE;
   }
   province->water = true;
   water_province_count++;
   return SUCCESS;
}

void Map::lock_water_provinces() {
   water_provinces_locked = true;
   Logger::info("Locked water provinces after registering ", water_province_count);
}

return_t Map::add_region(std::string const& identifier, std::vector<std::string> const& province_identifiers) {
   if (identifier.empty()) {
      Logger::error("Invalid region identifier - empty!");
      return FAILURE;
   }
   Region new_region{ identifier };
   return_t ret = SUCCESS;
   for (std::string const& province_identifier : province_identifiers) {
      Province* province = get_province_by_identifier(province_identifier);
      if (province != nullptr) {
         if (new_region.contains_province(province)) {
            Logger::error("Duplicate province identifier ", province_identifier);
            ret = FAILURE;
         } else {
            size_t other_region_index = reinterpret_cast<size_t>(province->get_region());
            if (other_region_index != 0) {
               other_region_index--;
               if (other_region_index < regions.get_item_count())
                  Logger::error("Province ", province_identifier, " is already part of ", regions.get_item_by_index(other_region_index)->get_identifier());
               else
                  Logger::error("Province ", province_identifier, " is already part of an unknown region with index ", other_region_index);
               ret = FAILURE;
            } else new_region.provinces.insert(province);
         }
      } else {
         Logger::error("Invalid province identifier ", province_identifier);
         ret = FAILURE;
      }
   }
   if (!new_region.get_province_count()) {
      Logger::error("No valid provinces in region's list");
      return FAILURE;
   }

   // Used to detect provinces listed in multiple regions, will
   // be corrected once regions is stable (i.e. lock_regions).
   Region* tmp_region_index = reinterpret_cast<Region*>(regions.get_item_count());
   for (Province* province : new_region.get_provinces())
      province->region = tmp_region_index;
   if (regions.add_item(std::move(new_region)) != SUCCESS) ret = FAILURE;
   return ret;
}

void Map::lock_regions() {
   regions.lock();
   for (Region& region : regions.get_items())
      for (Province* province : region.get_provinces())
         province->region = &region;
}

size_t Map::get_province_count() const {
   return provinces.get_item_count();
}

Province* Map::get_province_by_index(index_t index) {
   return index != NULL_INDEX ? provinces.get_item_by_index(index - 1) : nullptr;
}

Province const* Map::get_province_by_index(index_t index) const {
   return index != NULL_INDEX ? provinces.get_item_by_index(index - 1) : nullptr;
}

Province* Map::get_province_by_identifier(std::string const& identifier) {
   return provinces.get_item_by_identifier(identifier);
}

Province const* Map::get_province_by_identifier(std::string const& identifier) const {
   return provinces.get_item_by_identifier(identifier);
}

Province* Map::get_province_by_colour(colour_t colour) {
   if (colour != NULL_COLOUR)
      for (Province& province : provinces.get_items())
         if (province.get_colour() == colour) return &province;
   return nullptr;
}

Province const* Map::get_province_by_colour(colour_t colour) const {
   if (colour == NULL_COLOUR) { return nullptr; }
   for (Province const& province : provinces.get_items()) {
      if (province.get_colour() == colour)
         return &province;
   }
   return nullptr;
}

index_t Map::get_province_index_at(size_t x, size_t y) const {
   if (x < width && y < height) return province_index_image[x + y * width];
   return NULL_INDEX;
}

Region* Map::get_region_by_identifier(std::string const& identifier) {
   return regions.get_item_by_identifier(identifier);
}

Region const* Map::get_region_by_identifier(std::string const& identifier) const {
   return regions.get_item_by_identifier(identifier);
}

static colour_t colour_at(uint8_t const* colour_data, int32_t idx) {
   return (colour_data[idx * 3] << 16) | (colour_data[idx * 3 + 1] << 8) | colour_data[idx * 3 + 2];
}

return_t Map::generate_province_index_image(size_t new_width, size_t new_height, uint8_t const* colour_data) {
   if (!province_index_image.empty()) {
      Logger::error("Province index image has already been generated!");
      return FAILURE;
   }
   if (!provinces.is_locked()) {
      Logger::error("Province index image cannot be generated until after provinces are locked!");
      return FAILURE;
   }
   if (new_width < 1 || new_height < 1) {
      Logger::error("Invalid province image dimensions: ", new_width, "x", new_height);
      return FAILURE;
   }
   if (colour_data == nullptr) {
      Logger::error("Province colour data pointer is null!");
      return FAILURE;
   }
   width = new_width;
   height = new_height;
   province_index_image.resize(width * height);

   std::vector<bool> province_checklist(provinces.get_item_count());
   return_t ret = SUCCESS;
   std::unordered_set<colour_t> unrecognised_colours;

   for (int32_t y = 0; y < height; ++y) {
      for (int32_t x = 0; x < width; ++x) {
         const int32_t idx = x + y * width;
         const colour_t colour = colour_at(colour_data, idx);
         if (x > 0) {
            const int32_t jdx = idx - 1;
            if (colour_at(colour_data, jdx) == colour) {
               province_index_image[idx] = province_index_image[jdx];
               continue;
            }
         }
         if (y > 0) {
            const int32_t jdx = idx - width;
            if (colour_at(colour_data, jdx) == colour) {
               province_index_image[idx] = province_index_image[jdx];
               continue;
            }
         }
         Province const* province = get_province_by_colour(colour);
         if (province != nullptr) {
            const index_t index = province->get_index();
            province_index_image[idx] = index;
            province_checklist[index - 1] = true;
            continue;
         }
         if (unrecognised_colours.find(colour) == unrecognised_colours.end()) {
            unrecognised_colours.insert(colour);
            Logger::error("Unrecognised province colour ", Province::colour_to_hex_string(colour), " at (", x, ", ", y, ")");
            ret = FAILURE;
         }
         province_index_image[idx] = NULL_INDEX;
      }
   }

   for (size_t idx = 0; idx < province_checklist.size(); ++idx) {
      if (!province_checklist[idx]) {
         Logger::error("Province missing from shape image: ", provinces.get_item_by_index(idx)->to_string());
         ret = FAILURE;
      }
   }
   return ret;
}

size_t Map::get_width() const {
   return width;
}

size_t Map::get_height() const {
   return height;
}

std::vector<index_t> const& Map::get_province_index_image() const {
   return province_index_image;
}

return_t Map::add_mapmode(std::string const& identifier, Mapmode::colour_func_t colour_func) {
   if (identifier.empty()) {
      Logger::error("Invalid mapmode identifier - empty!");
      return FAILURE;
   }
   if (colour_func == nullptr) {
      Logger::error("Mapmode colour function is null for identifier: ", identifier);
      return FAILURE;
   }
   return mapmodes.add_item({ mapmodes.get_item_count(), identifier, colour_func });
}

void Map::lock_mapmodes() {
   mapmodes.lock();
}

size_t Map::get_mapmode_count() const {
   return mapmodes.get_item_count();
}

Mapmode const* Map::get_mapmode_by_index(size_t index) const {
   return mapmodes.get_item_by_index(index);
}

Mapmode const* Map::get_mapmode_by_identifier(std::string const& identifier) const {
   return mapmodes.get_item_by_identifier(identifier);
}

return_t Map::generate_mapmode_colours(Mapmode::index_t index, uint8_t* target) const {
   if (target == nullptr) {
      Logger::error("Mapmode colour target pointer is null!");
      return FAILURE;
   }
   Mapmode const* mapmode = mapmodes.get_item_by_index(index);
   if (mapmode == nullptr) {
      Logger::error("Invalid mapmode index: ", index);
      return FAILURE;
   }
   target += 4; // Skip past Province::NULL_INDEX
   for (Province const& province : provinces.get_items()) {
      const colour_t colour = mapmode->get_colour(*this, province);
      *target++ = (colour >> 16) & 0xFF;
      *target++ = (colour >> 8) & 0xFF;
      *target++ = colour & 0xFF;
      *target++ = province.is_water() ? 0 : 255;
   }
   return SUCCESS;
}

return_t Map::generate_province_buildings(BuildingManager const& manager) {
   return_t ret = SUCCESS;
   for (Province& province : provinces.get_items())
      if (manager.generate_province_buildings(province) != SUCCESS) ret = FAILURE;
   return ret;
}

void Map::update_state(Date const& today) {
   for (Province& province : provinces.get_items())
      province.update_state(today);
}

void Map::tick(Date const& today) {
   for (Province& province : provinces.get_items())
      province.tick(today);
}