// Copyright (c) 2020 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 <memory>
#include <string>
#include <vector>
#include "lite/core/kernel.h"
#include "lite/core/op_registry.h"
#include "lite/core/program.h"
#include "lite/core/types.h"
#include "lite/kernels/npu/bridges/engine.h"
#include "lite/kernels/npu/bridges/registry.h"
#include "rknpu/rknpu_pub.h"

namespace paddle {
namespace lite {
namespace kernels {
namespace rknpu {

class SubgraphEngine : public subgraph::Engine {
 public:
  SubgraphEngine(KernelContext *ctx,
                 int block_idx,
                 cpp::BlockDesc *block_desc,
                 const std::vector<std::string> &input_names,
                 const std::vector<std::string> &output_names,
                 Scope *scope)
      : subgraph::Engine(
            ctx, block_idx, block_desc, input_names, output_names, scope) {}

 protected:
  bool PrepareWorkspaceForDeviceProgram() override;
  bool BuildDeviceProgram() override;
  bool LaunchDeviceProgram() override;

  std::string model_name_;
  std::vector<std::string> device_inames_;
  std::vector<std::string> device_onames_;
  std::vector<std::shared_ptr<rk::nn::Tensor>> device_itensors_{};
  std::vector<std::shared_ptr<rk::nn::Tensor>> device_otensors_{};
  std::unique_ptr<rk::nn::Exection> device_program_{nullptr};
};

class SubgraphCompute
    : public KernelLite<TARGET(kRKNPU), PRECISION(kInt8), DATALAYOUT(kNCHW)> {
 public:
  using param_t = operators::SubgraphParam;

  void PrepareForRun() override;

  void Run() override;

  virtual ~SubgraphCompute() = default;

 private:
  std::unique_ptr<SubgraphEngine> engine_;
};

}  // namespace rknpu
}  // namespace kernels
}  // namespace lite
}  // namespace paddle