#ifndef REPL_H
#define REPL_H

#include "memory_pool.h"

#define REPL_LINE_BUFFER_SIZE 128
#define REPL_RESULT_BUFFER_SIZE 128

typedef enum {
	REPL_OK,
	REPL_ERROR,
	REPL_EXIT,
} repl_status_t;

typedef int (*get_byte_fn_t)(void);
typedef const expression_t *(*read_fn_t)(
    memory_pool_t *pool, const char *input, int len);
typedef int (*evaluate_fn_t)(const expression_t *expression);
typedef void (*print_fn_t)(const char *output, int len);

typedef struct {
	get_byte_fn_t get_byte;
	read_fn_t read;
	evaluate_fn_t evaluate;
	print_fn_t print;
	memory_pool_t pool;
	char line_buffer[REPL_LINE_BUFFER_SIZE];
	char result_buffer[REPL_RESULT_BUFFER_SIZE];
} repl_t;

void init_repl(repl_t *repl);
void step_repl(repl_t *repl);
void run_repl(repl_t *repl);

#endif