k.h

#ifndef _K_H
#define _K_H
#include <stdbool.h>
#include <math.h>
#include <string.h>
#include <ncurses.h>
#include <unistd.h>

// size of the board
#define SIZE 4

struct game {
    // game board
    char board[SIZE][SIZE];
    // current score
    int score;
};

bool move_UP(struct game *game);
bool move_DOWN(struct game *game);
bool move_RIGHT(struct game *game);
bool move_LEFT(struct game *game);
int search(char *letters, char letterToFind);
void trace_score(int col, int raw, struct game *game);
void get_input(int *dy, int *dx);
void copy_content(struct game *game, struct game *copy);

/**
 * Adds random A or B tile to the game
 * This is very dumb function. The board must have at least one empty tile. If
 * there is no empty tile, function will end in infinite loop.
 * @param game reference to the game object
 */
void add_random_tile(struct game *game);


/**
 * Makes move in given direction
 * If it is possible, function makes move in given direction, updates the
 * current game state (board and score) and returns true. If it is not
 * possible to move, returns false.
 * @param game reference to the game object
 * @param dy movement in y-axe
 * @param dx movement in y-axe
 * @return true, if game state was updated, false otherwise
 */
bool update(struct game *game, int dy, int dx);


/**
 * Checks whether it is possible to make move
 * Function checks game board if it is possible to make another move. The
 * move is possible, if there are two tiles with the same letter nearby or
 * there is at least one empty tile.
 * @param game the game object with board to check
 * @return true, if another movement is possible, or false otherwise.
 */
bool is_move_possible(const struct game game);


/**
 * Checks whether game is already won
 * Returns true, if tile with letter 'K' is located on the board. Returns
 * false, if it is not.
 * @param game the game object with board to check
 * @return true, if game is won, or false otherwise.
*/
bool is_game_won(const struct game game);

#endif