# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you 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.

if(NOT USE_PT_TVMDSOOP STREQUAL "OFF")
  find_package(Python3 COMPONENTS Interpreter Development)
  include_directories(${Python3_INCLUDE_DIRS})

  message(STATUS "Python3_INCLUDE_DIRS: ${Python3_INCLUDE_DIRS}")

  execute_process(COMMAND ${Python3_EXECUTABLE} -c "import torch; print(torch.__path__[0].strip())"
    OUTPUT_VARIABLE PT_PATH
    RESULT_VARIABLE PT_STATUS)
  if (NOT ${PT_STATUS} EQUAL 0)
    message(FATAL_ERROR "Fail to get pytorch path")
  endif()

  string(REGEX REPLACE "\n" "" PT_PATH "${PT_PATH}")

  set(PT_COMPILE_FLAGS_STR "-I${PT_PATH}/include -D_GLIBCXX_USE_CXX11_ABI=0")
  set(PT_LINK_FLAGS_STR "-L${PT_PATH}/lib -l:libtorch.so -l:libtorch_python.so")

  if(NOT USE_CUDA STREQUAL "OFF")
    add_definitions(-DPT_TVMDSOOP_ENABLE_GPU)
  endif()


  string(REGEX REPLACE "\n" " " PT_FLAGS "${PT_COMPILE_FLAGS} ${PT_LINK_FLAGS}")
  separate_arguments(PT_COMPILE_FLAGS UNIX_COMMAND ${PT_COMPILE_FLAGS_STR})
  separate_arguments(PT_LINK_FLAGS UNIX_COMMAND ${PT_LINK_FLAGS_STR})


  set(LIBRARY_NAME pt_tvmdsoop)
  tvm_file_glob(GLOB_RECURSE PTTVM_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/src/contrib/torch/**/*.cc)
  add_library(${LIBRARY_NAME} SHARED ${PTTVM_SRCS})
  set(PTTVM_LINK_FLAGS -ltvm -L${CMAKE_CURRENT_BINARY_DIR})

  if (NOT BUILD_PT_TVMDSOOP_ONLY STREQUAL "ON")
    add_dependencies(${LIBRARY_NAME} tvm) 
  endif()

  target_compile_options(${LIBRARY_NAME} PUBLIC ${PTTVM_COMPILE_FLAGS} ${PT_COMPILE_FLAGS})
  target_link_libraries(${LIBRARY_NAME} PUBLIC ${PTTVM_LINK_FLAGS} ${PT_LINK_FLAGS})

endif()