// Copyright (c) 2022 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 "fastdeploy/runtime/backends/backend.h"
#include "fastdeploy/runtime/backends/rknpu2/option.h"
#include "fastdeploy/core/fd_tensor.h"
#include "rknn_api.h"  // NOLINT
#include <cstring>
#include <iostream>
#include <memory>
#include <string>
#include <vector>

namespace fastdeploy {
class RKNPU2Backend : public BaseBackend {
 public:
  RKNPU2Backend() = default;

  virtual ~RKNPU2Backend();

  bool Init(const RuntimeOption& runtime_option);

  int NumInputs() const override {
    return static_cast<int>(inputs_desc_.size());
  }

  int NumOutputs() const override {
    return static_cast<int>(outputs_desc_.size());
  }

  TensorInfo GetInputInfo(int index) override;
  TensorInfo GetOutputInfo(int index) override;
  std::vector<TensorInfo> GetInputInfos() override;
  std::vector<TensorInfo> GetOutputInfos() override;
  bool Infer(std::vector<FDTensor>& inputs, std::vector<FDTensor>* outputs,
             bool copy_to_fd = true) override;

 private:
  // BaseBackend API
  void BuildOption(const RKNPU2BackendOption& option);
  
  // RKNN API
  bool LoadModel(void* model);

  bool GetSDKAndDeviceVersion();

  bool SetCoreMask(const rknpu2::CoreMask& core_mask) const;

  bool GetModelInputOutputInfos();

  // The object of rknn context.
  rknn_context ctx{};
  // The structure rknn_sdk_version is used to indicate the version
  // information of the RKNN SDK.
  rknn_sdk_version sdk_ver{};
  // The structure rknn_input_output_num represents the number of
  // input and output Tensor
  rknn_input_output_num io_num{};
  std::vector<TensorInfo> inputs_desc_;
  std::vector<TensorInfo> outputs_desc_;

  rknn_tensor_attr* input_attrs_ = nullptr;
  rknn_tensor_attr* output_attrs_ = nullptr;

  rknn_tensor_mem** input_mems_;
  rknn_tensor_mem** output_mems_;

  bool infer_init = false;

  RKNPU2BackendOption option_;

  static void DumpTensorAttr(rknn_tensor_attr& attr);
  static FDDataType RknnTensorTypeToFDDataType(rknn_tensor_type type);
  static rknn_tensor_type FDDataTypeToRknnTensorType(FDDataType type);
};
}  // namespace fastdeploy