#ifndef __HF__INTERPRETER_H__
#define __HF__INTERPRETER_H__

#include <stdbool.h>
#include <stddef.h>

#include "hashmap.h"
#include "parser.h"
#include "result.h"

#define HF__INTERPRETER__WORDS_CAP 23

struct hf__interpreter__word {
  struct hf__node *body;
  size_t body_len;
};

extern const hf__hashmap__free_value_t hf__interpreter__word_free;

#define HF__INTERPRETER__CALL_STACK_CAP_MAX 1024

struct hf__interpreter {
  struct hf__node *call_stack;
  size_t call_stack_len;
  size_t call_stack_cap;
  size_t call_stack_cap_max;

  struct hf__hashmap words; // struct hf__interpreter__word *

  int *stack;
  size_t stack_len;
  size_t stack_size;

  bool is_running;
  int exit_code;
};

extern void hf__interpreter__free(struct hf__interpreter *interpreter);

typedef struct hf__result (*hf__interpreter__word_func_t)(
    struct hf__interpreter *const, const struct hf__node *const);

extern int hf__interpreter__bool_to_flag(const bool x);

extern const hf__interpreter__word_func_t
    HF__INTERPRETER__WORD_FUNCTION[__HF__NODE_TYPE__N];

extern void hf__interpreter__stack_push(int **arr, size_t *const len,
                                        size_t *const cap, int item);

extern struct hf__result
hf__interpreter__run(struct hf__interpreter *const interpreter);

#endif