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#pragma once

#include <string>
#include <cstdint>
#include <vector>
#include <functional>

#include "Types.hpp"

namespace OpenVic2 {
   struct Region;
   struct Map;

   /* REQUIREMENTS:
    * MAP-43, MAP-47
    */
   struct Province {
      friend struct Map;

      using colour_t = uint32_t;
      using index_t = uint16_t;

      static const colour_t NULL_COLOUR = 0, MAX_COLOUR = 0xFFFFFF;
      static const index_t NULL_INDEX = 0, MAX_INDEX = 0xFFFF;
   private:
      index_t index;
      std::string identifier;
      colour_t colour;
      Region* region = nullptr;

      Province(index_t new_index, std::string const& new_identifier, colour_t new_colour);
   public:
      static std::string colour_to_hex_string(colour_t colour);

      index_t get_index() const;
      std::string const& get_identifier() const;
      colour_t get_colour() const;
      Region* get_region() const;
      std::string to_string() const;
   };

   /* REQUIREMENTS:
    * MAP-6, MAP-44, MAP-48
    */
   struct Region {
      friend struct Map;
   private:
      std::string identifier;
      std::vector<Province*> provinces;

      Region(std::string const& new_identifier);
   public:
      std::string const& get_identifier() const;
      size_t get_province_count() const;
      bool contains_province(Province const* province) const;
      std::vector<Province*> const& get_provinces() const;
   };

   struct Mapmode {
      friend struct Map;

      using colour_func_t = std::function<Province::colour_t (Map const&, Province const&)>;
      using index_t = size_t;
   private:
      index_t index;
      std::string identifier;
      colour_func_t colour_func;

      Mapmode(index_t new_index, std::string const& new_identifier, colour_func_t new_colour_func);
   public:
      index_t get_index() const;
      std::string const& get_identifier() const;
      colour_func_t get_colour_func() const;
   };

   /* REQUIREMENTS:
    * MAP-4
    */
   struct Map {
   private:
      std::vector<Province> provinces;
      std::vector<Region> regions;
      bool provinces_locked = false, regions_locked = false;

      size_t width = 0, height = 0;
      std::vector<Province::index_t> province_index_image;
      std::vector<Mapmode> mapmodes;
   public:
      return_t add_province(std::string const& identifier, Province::colour_t colour, std::string& error_message);
      void lock_provinces();
      return_t add_region(std::string const& identifier, std::vector<std::string> const& province_identifiers, std::string& error_message);
      void lock_regions();
      size_t get_province_count() const;

      Province* get_province_by_index(Province::index_t index);
      Province const* get_province_by_index(Province::index_t index) const;
      Province* get_province_by_identifier(std::string const& identifier);
      Province const* get_province_by_identifier(std::string const& identifier) const;
      Province* get_province_by_colour(Province::colour_t colour);
      Province const* get_province_by_colour(Province::colour_t colour) const;

      return_t generate_province_index_image(size_t new_width, size_t new_height, uint8_t const* colour_data, std::string& error_message);
      size_t get_width() const;
      size_t get_height() const;
      std::vector<Province::index_t> const& get_province_index_image() const;

      return_t add_mapmode(std::string const& identifier, Mapmode::colour_func_t colour_func, std::string& error_message);
      size_t get_mapmode_count() const;
      Mapmode const* get_mapmode_by_index(Mapmode::index_t index) const;
      Mapmode const* get_mapmode_by_identifier(std::string const& identifier) const;
      return_t generate_mapmode_colours(Mapmode::index_t index, uint8_t* target, std::string& error_message) const;
   };
}