#include "eval.h"
#include "util.h"
#include <stdint.h>

extern int
sha1digest(uint8_t *digest, char *hexdigest, const uint8_t *data, size_t databytes);

void
create_hash(recipe * r)
{
  char data[FOOD_MAX_ARRAY] = "\0";
  
  for (int i = 0; i < r->in; i++) {
    strcat(data, r->i[i]->name);
    strcat(data, r->i[i]->qty);
  }
  if (r->sn) {
    for (int i = 0; i < r->sn; i++)
      strcat(data, r->s[i]->inst);
  }
  sha1digest(NULL, r->sha1, (uint8_t *)data, strlen(data));
}

int
eval_step(step * s)
{
  s->duration = strdup(s->inst);
  s->result = strdup(s->inst);
  return 0;
}

int
resolve_steps(recipe * r)
{
  if (!r) return 1;

  int rc = 0;
  for (int i=0; i < r->sn; i++) {
    rc += eval_step(r->s[i]);
  }

  if (rc > 0) {
    return 1;
  }

  return 0;
}

recipe *
eval(recipe * r)
{
  if (!r) return NULL;
  recipe * _r = new_recipe();

  merge_items(_r, r);
  merge_steps(_r, r);
  copy_metadata(_r, r);
  copy_subrecipes(_r, r, 0 /* shallow copy off */);

  create_hash(_r);

  resolve_steps(_r);
  
  return _r;
}