#include "rocksdb/env.h"

#include "rocks/ctypes.hpp"
#include "rocks/rust_export.h"

using namespace ROCKSDB_NAMESPACE;

using std::shared_ptr;

extern "C" {
void rocks_iter_destroy(rocks_iterator_t* iter) {
  delete iter->rep;
  delete iter;
}

unsigned char rocks_iter_valid(const rocks_iterator_t* iter) { return iter->rep->Valid(); }

void rocks_iter_seek_to_first(rocks_iterator_t* iter) { iter->rep->SeekToFirst(); }

void rocks_iter_seek_to_last(rocks_iterator_t* iter) { iter->rep->SeekToLast(); }

void rocks_iter_seek(rocks_iterator_t* iter, const char* k, size_t klen) { iter->rep->Seek(Slice(k, klen)); }

void rocks_iter_seek_for_prev(rocks_iterator_t* iter, const char* k, size_t klen) {
  iter->rep->SeekForPrev(Slice(k, klen));
}

void rocks_iter_next(rocks_iterator_t* iter) { iter->rep->Next(); }

void rocks_iter_prev(rocks_iterator_t* iter) { iter->rep->Prev(); }

const char* rocks_iter_key(const rocks_iterator_t* iter, size_t* klen) {
  Slice s = iter->rep->key();
  *klen = s.size();
  return s.data();
}

const char* rocks_iter_value(const rocks_iterator_t* iter, size_t* vlen) {
  Slice s = iter->rep->value();
  *vlen = s.size();
  return s.data();
}

void rocks_iter_get_status(const rocks_iterator_t* iter, rocks_status_t** status) {
  SaveError(status, std::move(iter->rep->status()));
}

void rocks_iter_get_property(const rocks_iterator_t* iter, const char* prop, size_t prop_len, void* value,
                             rocks_status_t** status) {
  std::string cval;
  auto st = iter->rep->GetProperty(std::string(prop, prop_len), &cval);
  if (!SaveError(status, std::move(st))) {
    rust_string_assign(value, cval.data(), cval.size());
  }
}

rocks_iterator_t* rocks_new_empty_iterator() {
  auto it = NewEmptyIterator();
  return new rocks_iterator_t{it};
}
}