#ifndef HISTORY_H
#define HISTORY_H

#include <stdbool.h>

// one element in the buffer
typedef struct History_element_s {
    void* prevEl_p;
    char* line;
    void* nextEl_p;
} History_element_t;

// defines all vars for the buffer to operate
typedef struct History_s {
    History_element_t* FirstEl_p;
    History_element_t* LastEl_p;
    History_element_t* CurrEl_p;
    unsigned char size;
} History_t;

// create a fifo buffer and initilizes it with zeros
extern History_t* History_init();

// destroy a fifo buffer (free up its space)
extern int History_deinit(History_t* history, bool freeLines);

// put value i in buffer if there is still memory avaliable
extern int History_put(History_t *history, char* line);

// get value from buffer and writes it to *line
extern int History_getPrev(History_t* history, char** line);
extern int History_getNext(History_t* history, char** line);

extern int History_getCurrPos(History_t* history);

extern int History_getFullHistory(History_t* history, char*** list);

extern unsigned int History_getSize(History_t *history);

#endif