/**
 * Copyright 2019 Huawei Technologies Co., Ltd
 *
 * 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 "parallel/context.h"

#include <algorithm>
#include <cstdint>
#include <functional>
#include <memory>
#include <numeric>
#include <utility>

#include "common/utils.h"
#include "parallel/device_manager.h"

namespace mindspore {
namespace parallel {
std::vector<std::string> PARALLEL_MODE_LIST = {STAND_ALONE, DATA_PARALLEL, HYBRID_PARALLEL, SEMI_AUTO_PARALLEL,
                                               AUTO_PARALLEL};
std::vector<std::string> STRATEGY_SEARCH_MODE_LIST = {DYNAMIC_PROGRAMMING, RECURSIVE_PROGRAMMING};

std::shared_ptr<ParallelContext> ParallelContext::inst_context_ = nullptr;

std::shared_ptr<ParallelContext> ParallelContext::GetInstance() {
  if (inst_context_ == nullptr) {
    inst_context_.reset(new (std::nothrow) ParallelContext());
  }
  return inst_context_;
}

ParallelContext::ParallelContext() { Reset(); }

void ParallelContext::Reset() {
  mirror_mean_ = false;
  cast_before_mirror_ = true;
  loss_repeated_mean_ = true;
  device_num_ = 1;
  global_rank_ = 0;
  communication_backend_ = HCCL_BACKEND;
  device_num_is_set_ = false;
  global_rank_is_set_ = false;
  parallel_mode_ = STAND_ALONE;
  parameter_broadcast_ = false;
  parameter_broadcast_is_set_ = false;
  enable_all_reduce_fusion_ = false;
}

void ParallelContext::set_device_num(int32_t device_num) {
  device_num_ = device_num;
  device_num_is_set_ = true;
}

void ParallelContext::set_global_rank(int32_t global_rank) {
  global_rank_ = global_rank;
  global_rank_is_set_ = true;
}

void ParallelContext::set_mirror_mean(bool mirror_mean) { mirror_mean_ = mirror_mean; }

void ParallelContext::set_cast_before_mirror(bool cast_before_mirror) { cast_before_mirror_ = cast_before_mirror; }

void ParallelContext::set_loss_repeated_mean(bool loss_repeated_mean) { loss_repeated_mean_ = loss_repeated_mean; }

void ParallelContext::set_communication_backend(const std::string &communication_backend) {
  communication_backend_ = communication_backend;
}

bool ParallelContext::set_parallel_mode(const std::string &parallel_mode) {
  auto iter = std::find(PARALLEL_MODE_LIST.begin(), PARALLEL_MODE_LIST.end(), parallel_mode);
  if (iter == PARALLEL_MODE_LIST.end()) {
    MS_LOG(INFO) << "Invalid parallel mode:" << parallel_mode;
    return false;
  }
  parallel_mode_ = parallel_mode;
  return true;
}

bool ParallelContext::set_strategy_search_mode(const std::string &strategy_search_mode) {
  auto iter = std::find(STRATEGY_SEARCH_MODE_LIST.begin(), STRATEGY_SEARCH_MODE_LIST.end(), strategy_search_mode);
  if (iter == STRATEGY_SEARCH_MODE_LIST.end()) {
    MS_LOG(INFO) << "Invalid strategy search mode mode: " << strategy_search_mode;
    return false;
  }
  strategy_search_mode_ = strategy_search_mode;
  return true;
}

void ParallelContext::set_parameter_broadcast(bool parameter_broadcast) {
  parameter_broadcast_ = parameter_broadcast;
  parameter_broadcast_is_set_ = true;
}

void ParallelContext::set_all_reduce_fusion_split_indices(const std::vector<uint32_t> indices) {
  all_reduce_fusion_split_indices_ = indices;
}

const std::vector<uint32_t> ParallelContext::all_reduce_fusion_split_indices() const {
  return all_reduce_fusion_split_indices_;
}

void ParallelContext::set_all_reduce_fusion_split_sizes(const std::vector<uint32_t> sizes) {
  all_reduce_fusion_split_sizes_ = sizes;
}

const std::vector<uint32_t> ParallelContext::all_reduce_fusion_split_sizes() const {
  return all_reduce_fusion_split_sizes_;
}
}  // namespace parallel
}  // namespace mindspore