/* ******************************************************************************
 *
 *
 * This program and the accompanying materials are made available under the
 * terms of the Apache License, Version 2.0 which is available at
 * https://www.apache.org/licenses/LICENSE-2.0.
 *
 *  See the NOTICE file distributed with this work for additional
 *  information regarding copyright ownership.
 * 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.
 *
 * SPDX-License-Identifier: Apache-2.0
 ******************************************************************************/

//
// @author raver119@gmail.com
//
#include <array/ConstantDescriptor.h>
#include <array/DataTypeUtils.h>
#include <helpers/ModularHasher.h>
#include <stdexcept>

namespace sd {
ConstantDescriptor::ConstantDescriptor(double *values, int length) {
  for (int e = 0; e < length; e++) _floatValues.emplace_back(values[e]);
}

ConstantDescriptor::ConstantDescriptor(LongType const *values, int length) {
  for (int e = 0; e < length; e++) _integerValues.emplace_back(values[e]);
}

ConstantDescriptor::ConstantDescriptor(std::initializer_list<double> values) { _floatValues = values; }

ConstantDescriptor::ConstantDescriptor(std::vector<LongType> &values) { _integerValues = values; }

ConstantDescriptor::ConstantDescriptor(std::vector<double> &values) { _floatValues = values; }

// equal to operator
bool ConstantDescriptor::operator==(const ConstantDescriptor &other) const {
  return std::tie(_floatValues, _integerValues) == std::tie(other._floatValues, other._integerValues);
}

// less than operator
bool ConstantDescriptor::operator<(const ConstantDescriptor &other) const {
  return std::tie(_floatValues, _integerValues) < std::tie(other._floatValues, other._integerValues);
}

bool ConstantDescriptor::isInteger() const { return !_integerValues.empty(); }

bool ConstantDescriptor::isFloat() const { return !_floatValues.empty(); }

const std::vector<LongType> &ConstantDescriptor::integerValues() const { return _integerValues; }

const std::vector<double> &ConstantDescriptor::floatValues() const { return _floatValues; }

LongType ConstantDescriptor::length() const {
  return isInteger() ? _integerValues.size() : isFloat() ? _floatValues.size() : 0L;
}
}  // namespace sd

namespace std {
size_t hash<sd::ConstantDescriptor>::operator()(const sd::ConstantDescriptor &k) const {
  uint64_t hash = sd::helpers::detail::ModularHasher::hash_scalar(k.isInteger());

  // Hash the appropriate vector based on type
  if (k.isInteger()) {
    hash = sd::helpers::detail::ModularHasher::hash_vector(k.integerValues(), hash);
  } else {
    hash = sd::helpers::detail::ModularHasher::hash_vector(k.floatValues(), hash);
  }

  return hash;

}
}  // namespace std