penguin.hpp

#ifndef __PENGUIN_HPP__
#define __PENGUIN_HPP__

#include "game.hpp"
#include "json.hpp"
using json = nlohmann::json;
#include <random>
#include <array>
#include <iostream>
#include <memory>

namespace game
{
	struct penguin_state
	{
		uint64_t one_fish = 1152921504606846975; //Position of one-fish tiles (bitboard)
		uint64_t two_fish = 0; //Position of two-fish tiles (bitboard)
		uint64_t three_fish = 0; //Position of three-fish tiles (bitboard)

		//Penguins
		uint32_t peng_red[4] = {0, 1, 6, 7};
		uint32_t peng_blue[4] = {59, 58, 53, 54};

		int score_red = 0;
		int score_blue = 0;

		bool current_player_red = true; //True if red must play now. Red always starts

		int nb_moves_red = 0; //Number of moves the red player can play
		int nb_moves_blue = 0;

		bool canPlay_red = true;
		bool canPlay_blue = true;
	};
	//Describes the possible content of a peguin game tile
	enum tile_content {RED_PENGUIN,BLUE_PENGUIN,ONE_FISH,TWO_FISH,THREE_FISH,OBSTACLE};

	// Useful macros to get values out of penguins
	#define PENGUIN_POS(penguin) ((penguin) & 63)
	#define PENGUIN_TOT_MOVES(penguin) (((penguin) >> 6) & 63)
	#define PENGUIN_MOVES_A(penguin) (((penguin) >> 12) & 7)
	#define PENGUIN_MOVES_B(penguin) (((penguin) >> 15) & 7)
	#define PENGUIN_MOVES_C(penguin) (((penguin) >> 18) & 7)
	#define PENGUIN_MOVES_D(penguin) (((penguin) >> 21) & 7)
	#define PENGUIN_MOVES_E(penguin) (((penguin) >> 24) & 7)
	#define PENGUIN_MOVES_F(penguin) (((penguin) >> 27) & 7)

	class penguin : public game<penguin_state>
	{
		public:
			penguin();
			penguin(const penguin& pen) = default;
			penguin& operator=(const penguin& pen) = default;
			bool end_of_game() const; //Is the game ended? (draw or won)
			int value(std::uint8_t player) const; //Returns if the player win, loose or nothing
			bool won(std::uint8_t player) const;
			bool lost(std::uint8_t player) const;
			bool draw(std::uint8_t player) const;
			uint8_t current_player() const; //The player that has to play next (at the beginning, the first player)
			std::uint16_t number_of_moves() const; //Number of moves that you can play
			void play(std::uint16_t m); //Play the move m (updates the state).
			void undo(std::uint16_t m) {}
			std::string player_to_string(std::uint8_t player) const; //String representation of a player
			std::string move_to_string(std::uint16_t m) const; //String representation of a move (for example, A1)
			json to_JSON() const;
			std::string to_string() const; //String representation of the entire game
			std::set<int> to_input_vector() const;
			void from_input_vector(const std::set<int>& input);
			penguin_state get_state(); //Return the state
			void set_state(const penguin_state& state); //Replace the current state with the one passed as a parameter
			std::shared_ptr<game<penguin_state>> do_copy() const;
			std::uint64_t hash(std::uint16_t m) const;
			std::uint64_t hash() const;
			/**
				Returns the content of a tile
				i : the line, between 0 and 7
				j : the column, between 0 and 7 if i is pair else between 0 and 8
			*/	
			const tile_content get_tile(std::uint8_t tile_index) const;

		private:
			penguin_state state;
			void move_penguin(uint32_t* p, uint16_t rel_move);
			uint64_t create_obstacles_bitboard();
			int update_penguin_moves(uint32_t* p, uint64_t obstacles);

			const uint8_t RED = 0;
			const uint8_t BLUE = 1;

	};
	std::ostream& operator<<(std::ostream& os, const penguin& pen);
}

#endif