#ifndef GHOSTS_H_SENTRY
#define GHOSTS_H_SENTRY

#include "field.h"

enum {
    red_y               = 14,
    red_x               = 15,
    red_home_y          = -1,
    red_home_x          = 25,
    pink_y              = red_y + 1,
    pink_x              = red_x - 2,
    pink_home_y         = red_home_y,
    pink_home_x         = 2,
    blue_y              = red_y,
    blue_x              = red_x-1,
    blue_home_y         = 29,
    blue_home_x         = 27,
    orange_y            = red_y + 1,
    orange_x            = red_x - 3,
    orange_home_y       = blue_home_y,
    orange_home_x       = 0,
    pink_shift          = 4,
    blue_shift          = 2,
    orange_search_limit = 8,
    red_prison_y        = 14,
    red_prison_x        = 14,
    pink_prison_y       = red_prison_y + 1,
    pink_prison_x       = red_prison_x,
    blue_prison_y       = red_prison_y,
    blue_prison_x       = red_prison_x - 1,
    orange_prison_y     = red_prison_y + 1,
    orange_prison_x     = red_prison_x - 1,
    liberation_y        = 12
};

enum ghost_color { red, pink, blue, orange };
enum behavior_mode { chase, scatter, frightened };
enum movement_direction { left, right, up, down, none };

struct coordinates {
    int y;
    int x;
};

struct prison {
    int prison_counter;
    struct coordinates position;
    int active;
};

struct capture {
    struct coordinates previous_pac_position;
    struct coordinates previous_ghost_position;
    int status;
};

struct ghost_type {
    struct coordinates position;
    struct coordinates home_position;
    enum ghost_color color;
    int frightened_status;
    enum movement_direction direction;
    struct prison prison_params;
    struct capture capture_info;
    int reached_pacman;
};

void initialize_ghost(struct ghost_type *ghost, enum ghost_color color);

void pull_out_ghosts(int *get_out_stage,
                     struct ghost_type *red_ghost,
                     struct ghost_type *pink_ghost,
                     struct ghost_type *blue_ghost,
                     struct ghost_type *orange_ghost);

struct queue;
void clear_ghost_positions(game_space field, const struct queue *eaten_coins,
                           const struct ghost_type *red_ghost,
                           const struct ghost_type *pink_ghost,
                           const struct ghost_type *blue_ghost,
                           const struct ghost_type *orange_ghost);

void make_ghost_moves(game_space field,
                      struct ghost_type *red_ghost,
                      struct ghost_type *pink_ghost,
                      struct ghost_type *blue_ghost,
                      struct ghost_type *orange_ghost,
                      struct queue *eaten_coins);

struct pacman;
void redirect(game_space field, enum intersection_type paths,
              struct ghost_type *ghost, struct coordinates target_point,
              void (*pathfinder)(game_space, struct ghost_type*,
                    struct coordinates target_point));

void random_redirect(game_space field, struct ghost_type *ghost);

void breadth_first_search(game_space field, struct ghost_type *ghost,
                          struct coordinates target_point);

void compute_distance_between_points(game_space field, struct ghost_type *ghost,
                                     struct coordinates target_point);

struct coordinates identify_target_in_front(struct pacman pac, int shift);
struct coordinates identify_blue_target(struct pacman pac,
                                        const struct ghost_type *red_ghost);

void reverse_all_ghosts(struct ghost_type *red_ghost,
                        struct ghost_type *pink_ghost,
                        struct ghost_type *blue_ghost,
                        struct ghost_type *orange_ghost);

void set_frightened_status(int status, struct ghost_type *red_ghost,
                           struct ghost_type *pink_ghost,
                           struct ghost_type *blue_ghost,
                           struct ghost_type *orange_ghost);

int is_pac_nearby(struct pacman pac, struct ghost_type ghost);

void set_capture_info(struct ghost_type *ghost, const struct pacman *pac);

void catch_ghost(const game_space field, struct ghost_type *ghost);

#endif