/**
 * Copyright 2019-2020 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.
 */

#ifndef INC_GRAPH_NODE_H_
#define INC_GRAPH_NODE_H_

#include <map>
#include <memory>
#include <string>
#include <unordered_set>
#include <utility>
#include <vector>

#include "graph/ge_attr_value.h"
#include "graph/op_desc.h"
#include "graph/range_vistor.h"
#include "utils/attr_utils.h"

namespace ge {
class ComputeGraph;

using ComputeGraphPtr = std::shared_ptr<ComputeGraph>;

class Node;

using NodePtr = std::shared_ptr<Node>;
using ConstNodePtr = std::shared_ptr<const Node>;
using NodeRef = std::weak_ptr<Node>;

class Anchor;

using AnchorPtr = std::shared_ptr<Anchor>;

class InDataAnchor;

using InDataAnchorPtr = std::shared_ptr<InDataAnchor>;

class OutDataAnchor;

using OutDataAnchorPtr = std::shared_ptr<OutDataAnchor>;

class ControlAnchor;

using ControlAnchorPtr = std::shared_ptr<ControlAnchor>;

class InControlAnchor;

using InControlAnchorPtr = std::shared_ptr<InControlAnchor>;

class OutControlAnchor;

using OutControlAnchorPtr = std::shared_ptr<OutControlAnchor>;

using OpDescPtr = std::shared_ptr<OpDesc>;

using ConstNode = const Node;

typedef std::vector<std::multimap<std::string, ge::AnchorPtr>> kFusionDataFlowVec_t;

// Node is a component of ComputeGraph
class Node : public std::enable_shared_from_this<Node> {
  friend class ComputeGraph;
  friend class ModelSerializeImp;

 public:
  template <class T>
  using Vistor = RangeVistor<T, std::shared_ptr<ConstNode>>;
  ~Node();
  Node(const Node &) = delete;
  Node &operator=(const Node &) = delete;
  bool operator==(const Node &r_node) const;

 protected:
  Node() = default;
  Node(const OpDescPtr &op, const ComputeGraphPtr &ownerGraph);

 public:
  graphStatus Init();

  std::string GetName() const;
  std::string GetType() const;

  ComputeGraphPtr GetOwnerComputeGraph() const;
  graphStatus SetOwnerComputeGraph(const ComputeGraphPtr &graph);

  Vistor<InDataAnchorPtr> GetAllInDataAnchors() const;
  Vistor<OutDataAnchorPtr> GetAllOutDataAnchors() const;
  uint32_t GetAllInDataAnchorsSize() const;
  uint32_t GetAllOutDataAnchorsSize() const;
  Vistor<AnchorPtr> GetAllOutAnchors() const;
  Vistor<AnchorPtr> GetAllInAnchors() const;
  InDataAnchorPtr GetInDataAnchor(int idx) const;
  OutDataAnchorPtr GetOutDataAnchor(int idx) const;
  InControlAnchorPtr GetInControlAnchor() const;
  OutControlAnchorPtr GetOutControlAnchor() const;
  Vistor<NodePtr> GetInNodes() const;
  Vistor<NodePtr> GetOutNodes() const;
  AnchorPtr GetInAnchor(int idx) const;
  AnchorPtr GetOutAnchor(int idx) const;

  bool IsAllInNodesSeen(std::unordered_set<Node *> &nodes_seen) const;

  // All inData nodes
  Vistor<NodePtr> GetInDataNodes() const;
  // All inControl nodes
  Vistor<NodePtr> GetInControlNodes() const;
  // GetInAllNodes = InDataNodes + InControlNodes
  Vistor<NodePtr> GetInAllNodes() const;

  // All outData nodes
  Vistor<NodePtr> GetOutDataNodes() const;
  uint32_t GetOutDataNodesSize() const;
  // All outControl nodes
  Vistor<NodePtr> GetOutControlNodes() const;
  // GetOutAllNodes = OutDataNodes + InControlNodes
  Vistor<NodePtr> GetOutAllNodes() const;

  // Get all indata nodes and its outanchor
  Vistor<std::pair<NodePtr, OutDataAnchorPtr>> GetInDataNodesAndAnchors() const;

  // Get all outdata nodes and its inanchor
  Vistor<std::pair<NodePtr, InDataAnchorPtr>> GetOutDataNodesAndAnchors() const;

  graphStatus InferShapeAndType() const;
  graphStatus Verify() const;

  graphStatus InferOriginFormat() const;

  OpDescPtr GetOpDesc() const;

  graphStatus UpdateOpDesc(const OpDescPtr &op);

  graphStatus AddLinkFrom(const NodePtr &input_node);

  graphStatus AddLinkFrom(const uint32_t &index, NodePtr input_node);

  graphStatus AddLinkFrom(const string &name, NodePtr input_node);

  graphStatus AddLinkFromForParse(const NodePtr &input_node);

  void AddSendEventId(uint32_t event_id) { send_event_id_list_.push_back(event_id); }

  void AddRecvEventId(uint32_t event_id) { recv_event_id_list_.push_back(event_id); }

  const std::vector<uint32_t> &GetSendEventIdList() const { return send_event_id_list_; }

  const std::vector<uint32_t> &GetRecvEventIdList() const { return recv_event_id_list_; }
  void GetFusionInputFlowList(kFusionDataFlowVec_t &fusion_input_list) {
    fusion_input_list = fusion_input_dataflow_list_;
  }

  void GetFusionOutputFlowList(kFusionDataFlowVec_t &fusion_output_list) {
    fusion_output_list = fusion_output_dataflow_list_;
  }

  void SetFusionInputFlowList(kFusionDataFlowVec_t &fusion_input_list) {
    fusion_input_dataflow_list_ = fusion_input_list;
  }

  void SetFusionOutputFlowList(kFusionDataFlowVec_t &fusion_output_list) {
    fusion_output_dataflow_list_ = fusion_output_list;
  }

  void SetOrigNode(const NodePtr &orignode) { orig_node_ = orignode; }

  NodePtr GetOrigNode(void) { return orig_node_; }

 private:
  bool NodeMembersAreEqual(const Node &r_node) const;
  bool NodeAttrsAreEqual(const Node &r_node) const;
  bool NodeInConnectsAreEqual(const Node &r_node) const;
  bool NodeOutConnectsAreEqual(const Node &r_node) const;
  bool NodeAnchorIsEqual(const AnchorPtr &l_anchor, const AnchorPtr &r_anchor, size_t i) const;
  OpDescPtr op_;
  std::weak_ptr<ComputeGraph> owner_graph_;
  vector<InDataAnchorPtr> in_data_anchors_;
  vector<OutDataAnchorPtr> out_data_anchors_;
  InControlAnchorPtr in_control_anchor_;
  OutControlAnchorPtr out_control_anchor_;
  map<string, GeAttrValue> attrs_;
  bool has_init_{false};
  bool anchor_status_updated_{false};
  std::vector<uint32_t> send_event_id_list_;
  std::vector<uint32_t> recv_event_id_list_;

  kFusionDataFlowVec_t fusion_input_dataflow_list_;
  kFusionDataFlowVec_t fusion_output_dataflow_list_;

  NodePtr orig_node_;
  friend class NodeUtils;
  friend class OnnxUtils;
};
}  // namespace ge

#endif  // INC_GRAPH_NODE_H_