/**
 * @file gobang.h
 * @author ??????(3364451258@qq.com??15236416560@163.com??lhy3364451258@outlook.com)
 * @brief ?????????????
 * @version 3.0
 * @date 2025-06-30
 *
 * @copyright Copyright (c) 2025
 *
 * @note ??????gobang.c???????????????????????????????
 * @note ??????
 * 1. ???5x5??25x25??????????
 * 2. ????????????????AI????
 * 3. ?????????????????????
 * 4. ???????????0-base????
 * 5. ?????????????????
 * 6. ??????????????????????????????????
 * 7. ????????????????????????
 */

#ifndef GO_BANG_H
#define GO_BANG_H

#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <stdbool.h>
#include <time.h>
#include <string.h>

// ????
/**
 * @brief ????????????
 * @note 25x25????????????????????????????????????AI??????
 */
#define MAX_BOARD_SIZE 25 // ????????????(5x5??25x25)

/**
 * @brief ???????
 * @note ???1/2????????????????????????????
 */
#define PLAYER 1  // ???????????
#define AI 2      // AI????????
#define PLAYER1 1 // ???1????????
#define PLAYER2 2 // ???2????????

/**
 * @brief ??????????
 * @note ??????PLAYER/AI??????
 */
#define EMPTY 0 // ??????????

/**
 * @brief ?????????
 * @note ?????????????????????????????
 */
#define MAX_STEPS (MAX_BOARD_SIZE * MAX_BOARD_SIZE) // ??????????????????

// ??????????
extern int BOARD_SIZE;                            // ?????????????(???15)
extern int board[MAX_BOARD_SIZE][MAX_BOARD_SIZE]; // ?????????????
extern int step_count;                            // ?????????????
extern bool use_forbidden_moves;                  // ?????????????
extern int use_timer;                             // ????????????
extern int time_limit;                            // ??????????
extern const int direction[4][2];

/**
 * @brief ?????????????
 * @note ?????????????????AI??????
 * @note ??????:
 * - player: ????????(PLAYER/AI)
 * - x/y: 0-based????????
 */
typedef struct
{
    int player; // ????????
    int x, y;   // ????????
} Step;

extern Step steps[MAX_STEPS]; // ???????????????????

bool handle_player_turn(int current_player);

/**
 * @brief ?????????????
 * @note ????????????????????????
 * @note ??????:
 * - continuous_chess: ??????????????
 * - check_start: ??????????????????(??????)
 * - check_end: ??????????????????(??????)
 */
typedef struct
{
    int continuous_chess; // ????????????
    bool check_start;     // ????????????????????
    bool check_end;       // ????????????????????
} DirInfo;

// ????????
/**
 * @brief ???????????????
 */
void empty_board();

/**
 * @brief ????????????
 */
void print_board();

/**
 * @brief ??????????????????????
 * @param x ??????(0-base)
 * @param y ??????(0-base)
 * @return true ?????????????
 * @return false ????????????????
 */
bool have_space(int x, int y);

/**
 * @brief ???????????
 */
void setup_board_size();

/**
 * @brief ??????????
 * @note ????????????????????????
 */
void setup_game_options();

/**
 * @brief ???????????
 * @param player1 ???1????
 * @param player2 ???2????
 * @return int ??????????
 */
int determine_first_player(int player1, int player2);

/**
 * @brief ???????????
 * @param x ??????(0-base)
 * @param y ??????(0-base)
 * @param player ?????
 * @return true ?????
 * @return false ???????
 */
bool is_forbidden_move(int x, int y, int player);

/**
 * @brief ??????????
 * @param x ??????(0-base)
 * @param y ??????(0-base)
 * @return true ??????
 * @return false ???????(????????)
 */
bool player_move(int x, int y, int player);

/**
 * @brief ???????????????????????????
 * @param x ?????????
 * @param y ?????????
 * @param dx ??????????(-1,0,1)
 * @param dy ??????????(-1,0,1)
 * @param player ?????(PLAYER/AI)
 * @return DirInfo ???????????????????????????
 */
DirInfo count_specific_direction(int x, int y, int dx, int dy, int player);

/**
 * @brief ????????????????????????????
 * @param x ??????(0-base)
 * @param y ??????(0-base)
 * @param player ?????(PLAYER/AI)
 * @return true ??????????
 * @return false ????????????
 */
bool check_win(int x, int y, int player);

/**
 * @brief ??????????
 * @return true ??????
 * @return false ???????(????????)
 * @note ????????AI????????????
 */
bool return_move(int steps_to_undo);

/**
 * @brief ???????????
 * ????????????????????????
 */
void review_process(int game_mode);

/**
 * @brief ???????????????????????
 * @param player ??????????(PLAYER/AI)
 * @return int ???(???????????????)
 */
int evaluate_performance(int player);

/**
 * @brief ?????????????
 * @param x ??????
 * @param y ??????
 * @param player ?????
 * @return int ?????????
 */
int calculate_step_score(int x, int y, int player);

/**
 * @brief ???????????????????
 * @param filename ???????????
 * @return int ??????:
 *   0: ???
 *   1: ?????????
 *   2: ????????
 *   3: ??????????
 */
int save_game_to_file(const char *filename, int game_mode);

/**
 * @brief ????????????????????
 */
void handle_save_record(int game_mode);

/**
 * @brief ???????????????
 * @param filename ???????????
 * @return true ??????
 * @return false ???????
 */
int load_game_from_file(const char *filename);

#endif // GO_BANG_H