/*
  Copyright (c) 2014 DataStax

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

  http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
*/

#include "cassandra.hpp"

#include "iterator.hpp"
#include "result_iterator.hpp"
#include "collection_iterator.hpp"
#include "row_iterator.hpp"

extern "C" {

CassIterator*
cass_iterator_from_result(const CassResult* result) {
  return CassIterator::to(new cass::ResultIterator(result));
}

CassIterator*
cass_iterator_from_row(const CassRow* row) {
  return CassIterator::to(new cass::RowIterator(row));
}

CassIterator*
cass_iterator_from_collection(const CassValue* value) {
  if(cass_value_is_collection(value)) {
    return CassIterator::to(new cass::CollectionIterator(value));
  }
  return nullptr;
}

void
cass_iterator_free(
    CassIterator* iterator) {
  delete iterator->from();
}

cass_bool_t
cass_iterator_next(
    CassIterator* iterator) {
  return static_cast<cass_bool_t>(iterator->from()->next());
}

const CassRow*
cass_iterator_get_row(
    CassIterator *iterator) {
    cass::Iterator* internal_it = iterator->from();
    if(internal_it->type != cass::CASS_ITERATOR_TYPE_RESULT) {
      return nullptr;
    }
    cass::ResultIterator* result_it = static_cast<cass::ResultIterator*>(internal_it);
    return CassRow::to(&result_it->row());
}

const CassValue*
cass_iterator_get_column(
    CassIterator *iterator) {
  cass::Iterator* internal_it = iterator->from();
  if(internal_it->type != cass::CASS_ITERATOR_TYPE_ROW) {
    return nullptr;
  }
  cass::RowIterator* row_it = static_cast<cass::RowIterator*>(internal_it);
  return CassValue::to(row_it->column());
}

const CassValue*
cass_iterator_get_value(
    CassIterator *iterator) {
  cass::Iterator* internal_it = iterator->from();
  if(internal_it->type != cass::CASS_ITERATOR_COLLECTION) {
    return nullptr;
  }
  cass::CollectionIterator* collection_it = static_cast<cass::CollectionIterator*>(internal_it);
  return CassValue::to(collection_it->value());
}

} // extern "C"