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#ifndef SNAKE_H

#define	SNAKE_H

#include "CUBE.h"

#define SNAKE_BODY_COLOR        BLUE

#define SNAKE_HEAD_COLOR        RED

#define SNAKE_CANDY_COLOR       GREEN

#define SNAKE_COLLISION_COLOR   ORANGE

#define SNAKE_LEVEL_STEP    10

typedef struct {

    unsigned x  :8;

    unsigned y  :8;

    unsigned z  :8;

    unsigned    :8;

} SNAKE_POINT;

typedef union {

    struct {

        unsigned up         :1;

        unsigned down       :1;

        unsigned left       :1;

        unsigned backward   :1;

        unsigned right      :1;

        unsigned forward    :1;

        unsigned            :2;

    };

    uint8_t value;

} SNAKE_DIRECTION;

typedef struct {

    SNAKE_POINT body[CUBE_PIXELS];

    SNAKE_POINT direction;

    SNAKE_POINT candy_loc;

    uint8_t last_direction;

    uint32_t pos_head;

    uint32_t pos_tail;

    uint32_t length;

    uint32_t level;

    uint32_t delay;

} SNAKE_DATA;

void Snake_Init(SNAKE_DATA *data);

void Snake_Main(void);

void Snake_Update_Direction(uint8_t p1, uint8_t p2);

void Snake_Update_Frame(void);

SNAKE_POINT Snake_Generate_Candy(void);

#endif	/* SNAKE_H */