/*
 * Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#pragma once

#include "NvOnnxParser.h"
#include "ImporterContext.hpp"
#include "common.hpp"
#include "utils.hpp"
#include "builtin_op_importers.hpp"

namespace onnx2trt {

class ModelImporter final : public nvonnxparser::IParser {
  string_map<NodeImporter> _op_importers;
  ImporterContext _importer_ctx;
  std::list<::ONNX_NAMESPACE::ModelProto> _onnx_models; // Needed for ownership of weights
  int _current_node;
  std::vector<Status> _errors;

  Status importModel(::ONNX_NAMESPACE::ModelProto const &model,
                     uint32_t weight_count,
                     onnxTensorDescriptorV1 const *weight_descriptors);
  NodeImportResult importNode(::ONNX_NAMESPACE::NodeProto const& node,
                              std::vector<TensorOrWeights>& inputs,
                              std::vector<std::string>& output_names);
public:
  ModelImporter(nvinfer1::INetworkDefinition* network,
                nvinfer1::ILogger* logger)
    : _op_importers(getBuiltinOpImporterMap()),
      _importer_ctx(network, logger) {}
  bool parseWithWeightDescriptors(
      void const *serialized_onnx_model, size_t serialized_onnx_model_size,
      uint32_t weight_count,
      onnxTensorDescriptorV1 const *weight_descriptors) override;
  bool parse(void const *serialized_onnx_model,
             size_t serialized_onnx_model_size) override;
  bool parseFromFile(const char* onnxModelFile, int verbosity) override;
  bool supportsModel(void const *serialized_onnx_model,
                     size_t serialized_onnx_model_size,
         SubGraphCollection_t &sub_graph_collection) override;

  bool supportsOperator(const char* op_name) const override;
  void destroy() override { delete this; }
  //virtual void registerOpImporter(std::string op,
  //                                NodeImporter const &node_importer) override {
  //  // Note: This allows existing importers to be replaced
  //  _op_importers[op] = node_importer;
  //}
  //virtual Status const &setInput(const char *name,
  //                               nvinfer1::ITensor *input) override;
  //virtual Status const& setOutput(const char* name, nvinfer1::ITensor** output) override;
  int getNbErrors() const override { return _errors.size(); }
  nvonnxparser::IParserError const* getError(int index) const override {
    assert(0 <= index && index < (int)_errors.size());
    return &_errors[index];
  }
  void clearErrors() override { _errors.clear(); }
};

} // namespace onnx2trt