// Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
//
// 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.

#pragma once
#include <cstddef>
#include <cstdint>
#include <vector>
namespace paddle {
namespace distributed {

class GraphEdgeBlob {
 public:
  GraphEdgeBlob() {}
  virtual ~GraphEdgeBlob() {}
  size_t size() { return id_arr.size(); }
  virtual void add_edge(uint64_t id, float weight);
  uint64_t get_id(int idx) { return id_arr[idx]; }
  virtual float get_weight(int idx) { return 1; }

 protected:
  std::vector<uint64_t> id_arr;
};

class WeightedGraphEdgeBlob : public GraphEdgeBlob {
 public:
  WeightedGraphEdgeBlob() {}
  virtual ~WeightedGraphEdgeBlob() {}
  virtual void add_edge(uint64_t id, float weight);
  virtual float get_weight(int idx) { return weight_arr[idx]; }

 protected:
  std::vector<float> weight_arr;
};
}
}