// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

#include "test/util/include/test_utils.h"

#include "core/framework/ort_value.h"
#include "core/graph/onnx_protobuf.h"
#include "core/session/inference_session.h"
#include "core/framework/tensorprotoutils.h"

#include "test/util/include/asserts.h"
#include "test/util/include/test/test_environment.h"
#include "test/util/include/inference_session_wrapper.h"

#include "gmock/gmock.h"

namespace onnxruntime {
namespace test {
static void VerifyOutputs(const std::vector<std::string>& output_names,
                          const std::vector<OrtValue>& expected_fetches,
                          const std::vector<OrtValue>& fetches,
                          const EPVerificationParams& params) {
  ASSERT_EQ(expected_fetches.size(), fetches.size());

  for (size_t i = 0, end = expected_fetches.size(); i < end; ++i) {
    auto& ltensor = expected_fetches[i].Get<Tensor>();
    auto& rtensor = fetches[i].Get<Tensor>();
    ASSERT_EQ(ltensor.Shape().GetDims(), rtensor.Shape().GetDims());
    auto element_type = ltensor.GetElementType();
    switch (element_type) {
      case ONNX_NAMESPACE::TensorProto_DataType_INT32:
        EXPECT_THAT(ltensor.DataAsSpan<int32_t>(), ::testing::ContainerEq(rtensor.DataAsSpan<int32_t>()))
            << " mismatch for " << output_names[i];
        break;
      case ONNX_NAMESPACE::TensorProto_DataType_INT64:
        EXPECT_THAT(ltensor.DataAsSpan<int64_t>(), ::testing::ContainerEq(rtensor.DataAsSpan<int64_t>()))
            << " mismatch for " << output_names[i];
        break;
      case ONNX_NAMESPACE::TensorProto_DataType_UINT8:
        EXPECT_THAT(ltensor.DataAsSpan<uint8_t>(), ::testing::ContainerEq(rtensor.DataAsSpan<uint8_t>()))
            << " mismatch for " << output_names[i];
        break;
      case ONNX_NAMESPACE::TensorProto_DataType_FLOAT: {
        EXPECT_THAT(ltensor.DataAsSpan<float>(),
                    ::testing::Pointwise(::testing::FloatNear(params.fp32_abs_err), rtensor.DataAsSpan<float>()));
        break;
      }
      default:
        ORT_THROW("Unhandled data type. Please add 'case' statement for ", element_type);
    }
  }
}

int CountAssignedNodes(const Graph& current_graph, const std::string& ep_type) {
  int count = 0;

  for (const auto& node : current_graph.Nodes()) {
    if (node.GetExecutionProviderType() == ep_type) {
      ++count;
    }

    if (node.ContainsSubgraph()) {
      for (const auto& entry : node.GetSubgraphs()) {
        count += CountAssignedNodes(*entry, ep_type);
      }
    }
  }

  return count;
}

void RunAndVerifyOutputsWithEP(const ORTCHAR_T* model_path, const char* log_id,
                               std::unique_ptr<IExecutionProvider> execution_provider,
                               const NameMLValMap& feeds,
                               const EPVerificationParams& params) {
  // read raw data from model provided by the model_path
  std::ifstream stream(model_path, std::ios::in | std::ios::binary);
  std::string model_data((std::istreambuf_iterator<char>(stream)), std::istreambuf_iterator<char>());
  RunAndVerifyOutputsWithEP(model_data, log_id, std::move(execution_provider), feeds, params);
}

void RunAndVerifyOutputsWithEP(const std::string& model_data, const char* log_id,
                               std::unique_ptr<IExecutionProvider> execution_provider,
                               const NameMLValMap& feeds,
                               const EPVerificationParams& params) {
  SessionOptions so;
  so.session_logid = log_id;
  RunOptions run_options;
  run_options.run_tag = so.session_logid;

  //
  // get expected output from CPU EP
  //
  InferenceSessionWrapper session_object{so, GetEnvironment()};
  ASSERT_STATUS_OK(session_object.Load(model_data.data(), static_cast<int>(model_data.size())));
  ASSERT_STATUS_OK(session_object.Initialize());

  const auto& graph = session_object.GetGraph();
  const auto& outputs = graph.GetOutputs();

  // fetch all outputs
  std::vector<std::string> output_names;
  output_names.reserve(outputs.size());
  for (const auto* node_arg : outputs) {
    if (node_arg->Exists()) {
      output_names.push_back(node_arg->Name());
    }
  }

  std::vector<OrtValue> expected_fetches;
  ASSERT_STATUS_OK(session_object.Run(run_options, feeds, output_names, &expected_fetches));

  auto provider_type = execution_provider->Type();  // copy string so the std::move doesn't affect us

  //
  // get output with EP enabled
  //
  InferenceSessionWrapper session_object2{so, GetEnvironment()};
  ASSERT_STATUS_OK(session_object2.RegisterExecutionProvider(std::move(execution_provider)));
  ASSERT_STATUS_OK(session_object2.Load(model_data.data(), static_cast<int>(model_data.size())));
  ASSERT_STATUS_OK(session_object2.Initialize());

  // make sure that some nodes are assigned to the EP, otherwise this test is pointless...
  const auto& graph2 = session_object2.GetGraph();
  auto ep_nodes = CountAssignedNodes(graph2, provider_type);
  if (params.ep_node_assignment == ExpectedEPNodeAssignment::All) {
    // Verify the entire graph is assigned to the EP
    ASSERT_EQ(ep_nodes, graph2.NumberOfNodes()) << "Not all nodes were assigned to " << provider_type;
  } else if (params.ep_node_assignment == ExpectedEPNodeAssignment::None) {
    // Check if expected failure path is correctly handled by ep. (only used in NNAPI EP QDQ model test case for now)
    ASSERT_EQ(ep_nodes, 0) << "No nodes are supposed to be assigned to " << provider_type;
  } else {
    ASSERT_GT(ep_nodes, 0) << "No nodes were assigned to " << provider_type;
  }

  // Run with EP and verify the result
  std::vector<OrtValue> fetches;
  ASSERT_STATUS_OK(session_object2.Run(run_options, feeds, output_names, &fetches));
  VerifyOutputs(output_names, expected_fetches, fetches, params);

  if (params.graph_verifier) {
    (*params.graph_verifier)(graph2);
  }
}

#if !defined(DISABLE_SPARSE_TENSORS)
void SparseIndicesChecker(const ONNX_NAMESPACE::TensorProto& indices_proto, gsl::span<const int64_t> expected_indicies) {
  using namespace ONNX_NAMESPACE;
  Path model_path;
  std::vector<uint8_t> unpack_buffer;
  gsl::span<const int64_t> ind_span;
  std::vector<int64_t> converted_indices;
  TensorShape ind_shape(indices_proto.dims().data(), indices_proto.dims().size());
  const auto elements = gsl::narrow<size_t>(ind_shape.Size());
  const bool has_raw_data = indices_proto.has_raw_data();
  switch (indices_proto.data_type()) {
    case ONNX_NAMESPACE::TensorProto_DataType_INT64: {
      if (has_raw_data) {
        const auto& rd = indices_proto.raw_data();
        ASSERT_EQ(rd.size(), elements * sizeof(int64_t));
        ASSERT_STATUS_OK(utils::UnpackInitializerData(indices_proto, model_path, unpack_buffer));
        ind_span = gsl::make_span(unpack_buffer).as_span<const int64_t>();
      } else {
        ind_span = gsl::make_span(indices_proto.int64_data().cbegin(), indices_proto.int64_data().cend());
      }
      break;
    }
    case ONNX_NAMESPACE::TensorProto_DataType_INT32: {
      if (has_raw_data) {
        const auto& rd = indices_proto.raw_data();
        ASSERT_EQ(rd.size(), elements * sizeof(int32_t));
        ASSERT_STATUS_OK(utils::UnpackInitializerData(indices_proto, model_path, unpack_buffer));
        auto int32_span = gsl::make_span(unpack_buffer).as_span<const int32_t>();
        converted_indices.insert(converted_indices.cend(), int32_span.cbegin(), int32_span.cend());
      } else {
        converted_indices.insert(converted_indices.cend(), indices_proto.int32_data().cbegin(), indices_proto.int32_data().cend());
      }
      ind_span = gsl::make_span(converted_indices);
      break;
    }
    case ONNX_NAMESPACE::TensorProto_DataType_INT16: {
      ASSERT_TRUE(has_raw_data);
      const auto& rd = indices_proto.raw_data();
      ASSERT_EQ(rd.size(), elements * sizeof(int16_t));
      ASSERT_STATUS_OK(utils::UnpackInitializerData(indices_proto, model_path, unpack_buffer));
      auto int16_span = gsl::make_span(unpack_buffer).as_span<const int16_t>();
      converted_indices.insert(converted_indices.cend(), int16_span.cbegin(), int16_span.cend());
      ind_span = gsl::make_span(converted_indices);
      break;
    }
    case ONNX_NAMESPACE::TensorProto_DataType_INT8: {
      ASSERT_TRUE(has_raw_data);
      const auto& rd = indices_proto.raw_data();
      ASSERT_EQ(rd.size(), elements);
      ASSERT_STATUS_OK(utils::UnpackInitializerData(indices_proto, model_path, unpack_buffer));
      auto int8_span = gsl::make_span(unpack_buffer).as_span<const int8_t>();
      converted_indices.insert(converted_indices.cend(), int8_span.cbegin(), int8_span.cend());
      ind_span = gsl::make_span(converted_indices);
      break;
    }
    default:
      ASSERT_TRUE(false);
  }
  ASSERT_THAT(ind_span, testing::ContainerEq(expected_indicies));
}

#endif  // DISABLE_SPARSE_TENSORS

}  // namespace test
}  // namespace onnxruntime
