/* Copyright 2018 The TensorFlow 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.
==============================================================================*/

/* Wrap trt_conversion */
%{
#define SWIG_FILE_WITH_INIT
%}
%include "std_pair.i"
%include "tensorflow/python/platform/base.i"

%{
PyObject* pair_helper(std::pair<string, string>* in) {
  PyObject *first(nullptr), *second(nullptr), *tuple(nullptr);
  first = PyBytes_FromStringAndSize(in->first.data(), in->first.length());
  if (!first) {
    if (!PyErr_Occurred()) {
      PyErr_SetString(PyExc_TypeError, "Pair conversion first argument failed");
    }
    return NULL;
  }
  second = PyBytes_FromStringAndSize(in->second.data(), in->second.length());
  if (!second) {
    if (!PyErr_Occurred()) {
      PyErr_SetString(PyExc_TypeError,
                      "Pair conversion second argument failed");
    }
    return NULL;
  }
  tuple = Py_BuildValue("(OO)", first, second);
  if (!tuple) {
    if (!PyErr_Occurred()) {
      PyErr_SetString(PyExc_TypeError,
                      "Tuple creation from pair<string,string> failed!");
    }
    return NULL;
  }
  return tuple;
}

struct version_struct{
  int vmajor;
  int vminor;
  int vpatch;
};

PyObject* version_helper(version_struct* in) {
  PyObject *tuple(nullptr);
  tuple = Py_BuildValue("(iii)", in->vmajor, in->vminor, in->vpatch);
  if (!tuple) {
    if (!PyErr_Occurred()) {
      PyErr_SetString(PyExc_TypeError,
                      "Tuple creation from version structure failed!");
    }
    return NULL;
  }
  return tuple;
}
/* Define converters for vector<int> */
template<>
bool _PyObjAs(PyObject *pyobj, int* dest) {
  *dest = PyLong_AsLong(pyobj);
  return true;
}

template<>
PyObject *_PyObjFrom(const int& src) {
  return PyLong_FromLong(src);
}

%}

_LIST_OUTPUT_TYPEMAP(int, PyLong_FromLong);

%typemap(out) std::pair<string, string> {
  PyObject *tuple = pair_helper(&$1);
  if (!tuple) SWIG_fail;
  $result = tuple;
}

%typemap(out) version_struct {
  PyObject *tuple = version_helper(&$1);
  if (!tuple) SWIG_fail;
  $result = tuple;
}

%{
#include "tensorflow/core/lib/core/errors.h"
#include "tensorflow/core/lib/core/status.h"
#include "tensorflow/core/util/stat_summarizer.h"
#include "tensorflow/contrib/tensorrt/convert/convert_graph.h"
#include "tensorflow/contrib/tensorrt/convert/utils.h"
#include "tensorflow/contrib/tensorrt/test/utils.h"
%}

%ignoreall
%unignore tensorflow;
%unignore calib_convert;
%unignore get_linked_tensorrt_version;
%unignore get_loaded_tensorrt_version;
%unignore is_tensorrt_enabled;
%unignore enable_test_value;
%unignore clear_test_values;
%unignore add_test_value;
%unignore get_test_value;

%{

std::pair<string, string> calib_convert(
    string graph_def_string, bool is_dyn_op
    // unfortunately we can't use TF_Status here since it
    // is in c/c_api and brings in a lot of other libraries
    // which in turn declare ops. These ops are included
    // statically in our library and cause an abort when
    // module is loaded due to double registration
    // until Tensorflow properly exposes these headers
    // we have to work around this by returning a string
    // and converting it to exception on python side.
    //,TF_Status* out_status) {
) {
#if GOOGLE_CUDA && GOOGLE_TENSORRT
  string out_status;

  tensorflow::GraphDef graph_def;
  if (!graph_def.ParseFromString(graph_def_string)) {
    out_status = "InvalidArgument;Couldn't interpret input as a GraphDef";
    return std::pair<string, string>{out_status, ""};
  }
  graph_def_string.resize(0);
  tensorflow::GraphDef out_graph;
  tensorflow::Status conversion_status =
      tensorflow::tensorrt::convert::ConvertCalibGraphToInferGraph(
          graph_def, &out_graph, is_dyn_op);
  if (!conversion_status.ok()) {
    auto retCode = (int)conversion_status.code();
    char buff[2000];
    snprintf(buff, 2000, "%d;%s", retCode,
             conversion_status.error_message().c_str());
    out_status = buff;
    return std::pair<string, string>{out_status, ""};
  }
  string result;
  if (!out_graph.SerializeToString(&result)) {
    out_status = "InvalidArgument;Couldn't serialize output as a GraphDef";
    return std::pair<string, string>{out_status, ""};
  }
  out_status = "OK;All good!";
  return std::pair<string, string>{out_status, result};
#else
  // Returns FAILED_PRECONDITION.
  return std::pair<string, string>{"9;TensorRT is not enabled!", ""};
#endif  // GOOGLE_CUDA && GOOGLE_TENSORRT
}

version_struct get_linked_tensorrt_version() {
  // Return the version at the link time.
  version_struct s;
#if GOOGLE_CUDA && GOOGLE_TENSORRT
  const auto &lv = tensorflow::tensorrt::convert::GetLinkedTensorRTVersion();
  s.vmajor = lv[0];
  s.vminor = lv[1];
  s.vpatch = lv[2];
#endif  // GOOGLE_CUDA && GOOGLE_TENSORRT
  return s;
}

version_struct get_loaded_tensorrt_version() {
  // Return the version from the loaded library.
  version_struct s;
#if GOOGLE_CUDA && GOOGLE_TENSORRT
  const auto &lv = tensorflow::tensorrt::convert::GetLoadedTensorRTVersion();
  s.vmajor = lv[0];
  s.vminor = lv[1];
  s.vpatch = lv[2];
#endif  // GOOGLE_CUDA && GOOGLE_TENSORRT
  return s;
}

bool is_tensorrt_enabled() {
  return tensorflow::tensorrt::IsGoogleTensorRTEnabled();
}

void enable_test_value() {
  tensorflow::tensorrt::test::EnableTestValue();
}

#if PY_MAJOR_VERSION < 3
#define TRT_PY_TO_CPP_STRING PyString_AsString
#define TRT_CPP_TO_PY_STRING PyString_FromString
#else
#define TRT_PY_TO_CPP_STRING PyUnicode_AsUTF8
#define TRT_CPP_TO_PY_STRING PyUnicode_FromString
#endif

void clear_test_values(PyObject* pattern) {
  tensorflow::tensorrt::test::ClearTestValues(
      string(TRT_PY_TO_CPP_STRING(pattern)));
}

void add_test_value(PyObject* label, PyObject* value) {
  tensorflow::tensorrt::test::AddTestValue(
      string(TRT_PY_TO_CPP_STRING(label)), string(TRT_PY_TO_CPP_STRING(value)));
}

PyObject* get_test_value(PyObject* label) {
  string value = tensorflow::tensorrt::test::GetTestValue(
      string(TRT_PY_TO_CPP_STRING(label)));
  return TRT_CPP_TO_PY_STRING(value.c_str());
}

%}

std::pair<string, string> calib_convert(
    string graph_def_string, bool is_dyn_op);
version_struct get_linked_tensorrt_version();
version_struct get_loaded_tensorrt_version();
bool is_tensorrt_enabled();
void enable_test_value();
void clear_test_values(PyObject* pattern);
void add_test_value(PyObject* label, PyObject* value);
PyObject* get_test_value(PyObject* label);

%unignoreall