### VERSION INFO

set(OpenPose_VERSION_MAJOR 1)
set(OpenPose_VERSION_MINOR 2)
set(OpenPose_VERSION_PATCH 1)
set(OpenPose_VERSION ${OpenPose_VERSION_MAJOR}.${OpenPose_VERSION_MINOR}.${OpenPose_VERSION_PATCH})


### CMAKE HEADERS
cmake_policy(SET CMP0048 NEW)
project(OpenPose VERSION ${OpenPose_VERSION})
cmake_minimum_required(VERSION 2.8.7 FATAL_ERROR) # min. cmake version recommended by Caffe


### FIND THE OS

if (WIN32) # OS is Windows
  message(STATUS "Windows OS support currently is experimental.")
  message(STATUS "Feel free to send us any suggestion or bug you encounter.")
elseif (APPLE) # OS is Apple
  message(FATAL_ERROR "Apple OS is not currently supported.")
elseif (UNIX AND NOT APPLE) # OS is a Linux distribution (it assumes Ubuntu)
  set(EXECUTE_COMMAND lsb_release -rs) 
  execute_process(COMMAND ${EXECUTE_COMMAND} OUTPUT_VARIABLE UBUNTU_VERSION)
  string(SUBSTRING ${UBUNTU_VERSION} 0 2 UBUNTU_MAJOR_VERSION)
  if (${UBUNTU_MAJOR_VERSION} MATCHES "16") # if 16
    set(IS_UBUNTU_16 TRUE)
    set(IS_UBUNTU_14_OR_LESS FALSE)
  else (${UBUNTU_MAJOR_VERSION} MATCHES "16") # if 14 or less
    set(IS_UBUNTU_16 FALSE)
    set(IS_UBUNTU_14_OR_LESS TRUE)
  endif (${UBUNTU_MAJOR_VERSION} MATCHES "16")
endif ()

### FLAGS

if (WIN32)
   # TODO -- Makeshift solution -- This prevents rerunning build again
  # https://gitlab.kitware.com/cmake/cmake/issues/16783
  set(CMAKE_SUPPRESS_REGENERATION ON)

  string (REPLACE "/D_WINDOWS" "" CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
  string (REPLACE "/DWIN32" "" CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})

  # /GL option causes the code to crash -- fix this
  # sdl flags causes error -- error : unknown attribute \"guard\"

  set(CMAKE_CONFIGURATION_TYPES Debug Release CACHE TYPE INTERNAL FORCE)
  
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP")
  string(REPLACE "/W3" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
  string(REPLACE "/GR" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")

  string(REPLACE "/O2" "/Ox" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
  string(REPLACE "/Ob2" "" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /Ot /Oi /Gy /Z7")

  set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /LTCG:incremental /OPT:REF /OPT:ICF")
  
  string(REPLACE "/MDd" "/MD" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
  string(REPLACE "/Zi" "/Z7" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
  string(REPLACE "/RTC1" "" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
elseif (UNIX AND NOT APPLE)
  # Turn on C++11 
  add_definitions(-std=c++11)
  set(CMAKE_CXX_FLAGS_RELEASE "-O3")
endif (WIN32)

# C++ additional flags
if(CMAKE_COMPILER_IS_GNUCXX)
    message(STATUS "GCC detected, adding compile flags")
    set(OP_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fopenmp -Wpedantic -Wall -Wextra -Wfatal-errors")
endif(CMAKE_COMPILER_IS_GNUCXX)

### PROJECT OPTIONS

# Select the DL Framework
set(DL_FRAMEWORK CAFFE CACHE STRING "Select Deep Learning Framework.")
set_property(CACHE DL_FRAMEWORK PROPERTY STRINGS CAFFE)
# set_property(CACHE DL_FRAMEWORK PROPERTY STRINGS CAFFE CAFFE2 TENSORFLOW)

# Suboptions for Caffe DL Framework
include(CMakeDependentOption)
if (${DL_FRAMEWORK} MATCHES "CAFFE")
  CMAKE_DEPENDENT_OPTION(BUILD_CAFFE "Build Caffe as part of OpenPose." ON
      "DL_FRAMEWORK" ON)
  # OpenPose flags
  add_definitions(-DUSE_CAFFE)
endif (${DL_FRAMEWORK} MATCHES "CAFFE")

if (WIN32)
  # Select the Enhanced Instruction Set
  set(INSTRUCTION_SET NONE CACHE STRING "Enable Enhanced Instruction Set")
  set_property(CACHE INSTRUCTION_SET PROPERTY STRINGS NONE SSE SSE2 AVX AVX2 IA32)

  # Suboptions for Enhanced Instruction Set
  if (${INSTRUCTION_SET} MATCHES "SSE")
    add_definitions("/arch:SSE")
  elseif (${INSTRUCTION_SET} MATCHES "SSE2")
    add_definitions("/arch:SSE2")
  elseif (${INSTRUCTION_SET} MATCHES "AVX")
    add_definitions("/arch:AVX")
  elseif (${INSTRUCTION_SET} MATCHES "AVX2")
    add_definitions("/arch:AVX2")
  elseif (${INSTRUCTION_SET} MATCHES "IA32")
    add_definitions("/arch:IA32")
  endif (${INSTRUCTION_SET} MATCHES "SSE")
endif (WIN32)

# Set the acceleration library
set(GPU_MODE CUDA CACHE STRING "Select the acceleration GPU library or CPU otherwise.")
set_property(CACHE GPU_MODE PROPERTY STRINGS CUDA)
# set_property(CACHE GPU_MODE PROPERTY STRINGS CUDA OPENCL CPU_ONLY)
if (${GPU_MODE} MATCHES "CUDA")
  # OpenPose flags
  add_definitions(-DUSE_CUDA)
elseif (${GPU_MODE} MATCHES "CPU_ONLY")
  # OpenPose flag for Caffe
  add_definitions(-DCPU_ONLY)
endif ()

# Set/disable profiler
if (PROFILER_ENABLED)
  add_definitions(-DPROFILER_ENABLED)
endif (PROFILER_ENABLED)

# Suboptions for GPU architectures
if (${GPU_MODE} MATCHES "CUDA")
  set(CUDA_ARCH Auto CACHE STRING "Select target NVIDIA GPU achitecture.")
  set_property(CACHE CUDA_ARCH PROPERTY STRINGS Auto All Manual)
endif (${GPU_MODE} MATCHES "CUDA")

# Suboptions for acceleration library
if (${GPU_MODE} MATCHES "CUDA")
  option(USE_CUDNN "Build OpenPose with cuDNN library support." ON)
endif (${GPU_MODE} MATCHES "CUDA")

# Suboptions for OpenPose 3D Reconstruction demo
if (WIN32)
  option(WITH_3D "Build OpenPose 3D Reconstruction demo." OFF)
endif (WIN32)

 
# Download the models
option(DOWNLOAD_COCO_MODEL "Download COCO model." ON)
option(DOWNLOAD_MPI_MODEL "Download MPI model." OFF)
option(DOWNLOAD_HAND_MODEL "Download hand model." ON)  
option(DOWNLOAD_FACE_MODEL "Download face model." ON)

# More options
option(BUILD_EXAMPLES "Build OpenPose examples." ON)
option(BUILD_DOCS "Build OpenPose documentation." OFF)

# Build as shared library
option(BUILD_SHARED_LIBS "Build as shared lib" ON)

# Speed profiler
option(PROFILER_ENABLED "If enabled, OpenPose will be able to print out speed information at runtime." OFF)

### FIND REQUIRED PACKAGES

list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules")

find_package(CUDA)
  
if (UNIX AND NOT APPLE)
  include(cmake/Cuda.cmake)
  find_package(CuDNN)
  find_package(GFlags)
  find_package(Glog)
  find_package(OpenCV)

  # Set CUDA Flags
  set(CUDA_NVCC_FLAGS "${CUDA_NVCC_FLAGS} -std=c++11")

  if (NOT CUDA_FOUND)
    message(STATUS "CUDA not found.") 
    execute_process(COMMAND cat install_cuda.sh WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/ubuntu)
    message(FATAL_ERROR "Install CUDA using the above commands.")
  endif (NOT CUDA_FOUND)

  if (USE_CUDNN AND NOT CUDNN_FOUND)
    message(STATUS "cuDNN not found.") 
    execute_process(COMMAND cat install_cudnn.sh WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/ubuntu)
    message(FATAL_ERROR "Install cuDNN using the above commands. or turn off cuDNN by setting USE_CUDNN to OFF.")
  endif (USE_CUDNN AND NOT CUDNN_FOUND)

  if (NOT GLOG_FOUND)
    message(FATAL_ERROR "Glog not found. Install Glog from the command line using the command(s) -\ 
        sudo apt-get install libgoogle-glog-dev")
  endif (NOT GLOG_FOUND)

  if (NOT GFLAGS_FOUND)
    message(FATAL_ERROR "GFlags not found. Install GFlags from the command line using the command(s) --\ 
      sudo apt-get install libgflags-dev")
  endif (NOT GFLAGS_FOUND)

  if (NOT OpenCV_FOUND)
    message(FATAL_ERROR "OpenCV not found. Install OpenCV from the command line using the command(s) --\
      sudo apt-get install libopencv-dev")
  endif (NOT OpenCV_FOUND)

endif (UNIX AND NOT APPLE)

include(cmake/Utils.cmake)

if (WIN32)

  if("${CMAKE_VERSION}" VERSION_GREATER 3.6.3)
    set_property(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY VS_STARTUP_PROJECT OpenPoseDemo)
  endif("${CMAKE_VERSION}" VERSION_GREATER 3.6.3)

  set_property(GLOBAL PROPERTY USE_FOLDERS ON)
  set(FIND_LIB_PREFIX ${CMAKE_SOURCE_DIR}/3rdparty/windows)

  # Download Windows 3rd party
  message(STATUS "Downloading windows dependencies...")
  set(OP_WIN_URL "http://posefs1.perception.cs.cmu.edu/OpenPose/3rdparty/windows")
  set(OP_WIN_DIR "${CMAKE_SOURCE_DIR}/3rdparty/windows")

  #TODO Add hashes
  download_zip("opencv_310.zip" ${OP_WIN_URL} ${FIND_LIB_PREFIX} 1e5240a64b814b3c0b822f136be78ad7)
  download_zip("caffe3rdparty_2017_07_14.zip" ${OP_WIN_URL} ${FIND_LIB_PREFIX} ec0f800c8fb337e33304f3375bd06a80)
  download_zip("caffe_2018_01_18.zip" ${OP_WIN_URL} ${FIND_LIB_PREFIX} 4b8e548cc7ea20abea472950dd5301bd)
  if (WITH_3D)
    download_zip("freeglut_2018_01_14.zip" ${OP_WIN_URL} ${FIND_LIB_PREFIX} BB182187285E06880F0EDE3A39530091)
  endif (WITH_3D)
  message(STATUS "Windows dependencies downloaded.")

  find_library(OpenCV_LIBS opencv_world310 HINTS ${FIND_LIB_PREFIX}/opencv/x64/vc14/lib)
  find_library(GFLAGS_LIBRARY_RELEASE gflags HINTS ${FIND_LIB_PREFIX}/caffe3rdparty/lib)
  find_library(GFLAGS_LIBRARY_DEBUG gflagsd HINTS ${FIND_LIB_PREFIX}/caffe3rdparty/lib)
  find_library(GLOG_LIBRARY_RELEASE glog HINTS ${FIND_LIB_PREFIX}/caffe3rdparty/lib)
  find_library(GLOG_LIBRARY_DEBUG glogd HINTS ${FIND_LIB_PREFIX}/caffe3rdparty/lib)
  find_library(OpenCV_LIBS opencv_world310 HINTS ${FIND_LIB_PREFIX}/opencv/x64/vc14/lib)
  find_library(Caffe_LIB caffe HINTS ${FIND_LIB_PREFIX}/caffe/lib)
  find_library(Caffe_Proto_LIB caffeproto HINTS ${FIND_LIB_PREFIX}/caffe/lib)
  if (WITH_3D)
    find_library(Spinnaker_LIB spinnaker_v140 HINTS ${FIND_LIB_PREFIX}/spinnaker/lib)
    find_library(Freeglut_LIB freeglut HINTS ${FIND_LIB_PREFIX}/freeglut/lib)
    message(STATUS "\${Freeglut_LIB} = ${Freeglut_LIB}")
  endif (WITH_3D)
  set(Caffe_LIBS ${Caffe_LIB};${Caffe_Proto_LIB})
  set(OpenCV_INCLUDE_DIRS "3rdparty/windows/opencv/include")
  set(Caffe_INCLUDE_DIRS "3rdparty/windows/caffe/include;3rdparty/windows/caffe/include2")
  set(Boost_INCLUDE_DIRS "3rdparty/windows/caffe3rdparty/include/boost-1_61")
  set(WINDOWS_INCLUDE_DIRS "3rdparty/windows/caffe3rdparty/include")
  if (WITH_3D)
    set(SPINNAKER_INCLUDE_DIRS "3rdparty/windows/spinnaker/include")
    set(FREEGLUT_INCLUDE_DIRS "3rdparty/windows/freeglut/include")
  endif (WITH_3D)
endif (WIN32)

### CAFFE

if (UNIX AND NOT APPLE)

  if (${DL_FRAMEWORK} MATCHES "CAFFE")

    # Check if the user specified caffe paths
    if (Caffe_INCLUDE_DIRS AND Caffe_LIBS AND NOT BUILD_CAFFE)
      message(STATUS "\${Caffe_INCLUDE_DIRS} set by the user to " ${Caffe_INCLUDE_DIRS})
      message(STATUS "\${Caffe_LIBS} set by the user to " ${Caffe_LIBS})
      set(Caffe_FOUND 1)
    endif (Caffe_INCLUDE_DIRS AND Caffe_LIBS AND NOT BUILD_CAFFE)

    # Check if caffe is installed in known paths
    if (NOT Caffe_FOUND AND NOT BUILD_CAFFE) 
      message(STATUS "Looking for caffe around in expected paths.")
      find_package(Caffe)
    endif (NOT Caffe_FOUND AND NOT BUILD_CAFFE)

    # Else build from scratch
    if (BUILD_CAFFE)

      # Download Caffe
      message(STATUS "Caffe will be downloaded from source now. NOTE: This process might take several minutes depending
          on your internet connection.")
      execute_process(COMMAND git submodule update --init --recursive)
      
      # Build Caffe
      message(STATUS "Caffe will be built from source now.")
      include(ExternalProject)
      set(CAFFE_PREFIX caffe)
      set(CAFFE_URL ${CMAKE_SOURCE_DIR}/3rdparty/caffe)

      ExternalProject_Add(openpose_caffe
          SOURCE_DIR ${CAFFE_URL}
          PREFIX ${CAFFE_PREFIX}
          CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
              -DUSE_CUDNN=${USE_CUDNN}
              -DBUILD_docs=OFF
              -DBUILD_python=OFF
              -DBUILD_python_layer=OFF
              -DUSE_LEVELDB=OFF
              -DUSE_LMDB=OFF
              -DUSE_OPENCV=OFF)
              # -DOpenCV_DIR=${OpenCV_DIR})

      ExternalProject_Get_Property(openpose_caffe install_dir)

      set(Caffe_INCLUDE_DIRS ${CMAKE_BINARY_DIR}/caffe/include)
      # TODO -- Find a better soln.
      set(Caffe_LIBS ${CMAKE_BINARY_DIR}/caffe/lib/libcaffe.so)

    endif (BUILD_CAFFE)

    if (NOT Caffe_FOUND AND NOT BUILD_CAFFE)
      message(FATAL_ERROR "Caffe not found. Either turn on the BUILD_CAFFE option or specify the path of Caffe includes 
          and libs using -DCaffe_INCLUDE_DIRS and -DCaffe_LIBS")
    endif (NOT Caffe_FOUND AND NOT BUILD_CAFFE)

  endif (${DL_FRAMEWORK} MATCHES "CAFFE")

endif (UNIX AND NOT APPLE)

### PROJECT INCLUDES

# Specify the include directories
include_directories(
  include
  ${CUDA_INCLUDE_DIRS}
  ${GFLAGS_INCLUDE_DIR}
  ${GLOG_INCLUDE_DIR}
  ${Caffe_INCLUDE_DIRS}
  ${OpenCV_INCLUDE_DIRS})
if (WIN32)
  include_directories(
    ${Boost_INCLUDE_DIRS}
    ${WINDOWS_INCLUDE_DIRS})
  if (WITH_3D)
    include_directories(
      ${SPINNAKER_INCLUDE_DIRS}
      ${FREEGLUT_INCLUDE_DIRS})
  endif (WITH_3D)
endif (WIN32)

### ADD SUBDIRECTORIES

add_subdirectory(src)
if (BUILD_EXAMPLES)
  add_subdirectory(examples)
  if (WITH_3D)
    add_subdirectory(examples_beta)
  endif (WITH_3D)
endif (BUILD_EXAMPLES)

### DOWNLOAD MODELS

# Download the models if flag is set
message(STATUS "Download the models.")

# URL to the models
set(OPENPOSE_URL "http://posefs1.perception.cs.cmu.edu/OpenPose/models/")
  
download_model("body (COCO)" ${DOWNLOAD_COCO_MODEL} pose/coco/pose_iter_440000.caffemodel
    5156d31f670511fce9b4e28b403f2939) # Body (COCO)
download_model("body (MPI)" ${DOWNLOAD_MPI_MODEL} pose/mpi/pose_iter_160000.caffemodel
    2ca0990c7562bd7ae03f3f54afa96e00) # Body (MPI)
download_model("face" ${DOWNLOAD_FACE_MODEL} face/pose_iter_116000.caffemodel
    e747180d728fa4e4418c465828384333) # Face
download_model("hand" ${DOWNLOAD_HAND_MODEL} hand/pose_iter_102000.caffemodel
    a82cfc3fea7c62f159e11bd3674c1531) # Hand

message(STATUS "Models Downloaded.")

### GENERATE DOCUMENTATION

if (UNIX AND NOT APPLE)

  if (BUILD_DOCS)
    find_package(Doxygen)
    if (DOXYGEN_FOUND)
      # Set input and output files
      set(DOXYGEN_FILE ${CMAKE_SOURCE_DIR}/doc/doc_autogeneration.doxygen)

      # Custom target to build the documentation
      add_custom_target(doc_doxygen ALL
          COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYGEN_FILE}
          WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/doc
          COMMENT "Generating API documentation with Doxygen"
          VERBATIM)
    else (DOXYGEN_FOUND)
      message("Doxygen need to be installed to generate the doxygen documentation")
    endif (DOXYGEN_FOUND)
  endif (BUILD_DOCS)

endif (UNIX AND NOT APPLE)

### INSTALL

if (UNIX AND NOT APPLE)
  # Install the headers
  install(DIRECTORY ${CMAKE_SOURCE_DIR}/include/openpose DESTINATION include)
  install(EXPORT OpenPose DESTINATION lib/OpenPose)
  if (BUILD_CAFFE)
    install(DIRECTORY ${CMAKE_BINARY_DIR}/caffe/include/caffe DESTINATION include)
    install(DIRECTORY ${CMAKE_BINARY_DIR}/caffe/lib/ DESTINATION lib)
  endif (BUILD_CAFFE)

  # Compute installation prefix relative to this file
  configure_file(
      ${CMAKE_SOURCE_DIR}/cmake/OpenPoseConfig.cmake.in
      ${CMAKE_BINARY_DIR}/cmake/OpenPoseConfig.cmake @ONLY)

  install(FILES ${CMAKE_BINARY_DIR}/cmake/OpenPoseConfig.cmake
      DESTINATION lib/OpenPose)

  # Uninstall target
  configure_file(
      "${CMAKE_SOURCE_DIR}/cmake/cmake_uninstall.cmake.in"
      "${CMAKE_BINARY_DIR}/cmake_uninstall.cmake"
      IMMEDIATE @ONLY)

  add_custom_target(uninstall
      COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake)
endif (UNIX AND NOT APPLE)