# Definition of the custom target user_version
add_custom_target(user_version)

if(DEFINED USER_VERSION_DIR)
  # set the GUDHI_USER_VERSION_DIR with USER_VERSION_DIR defined by the user
  set(GUDHI_USER_VERSION_DIR ${CMAKE_CURRENT_BINARY_DIR}/${USER_VERSION_DIR})
else()
  # set the GUDHI_USER_VERSION_DIR with timestamp and Gudhi version number
  string(TIMESTAMP DATE_AND_TIME "%Y-%m-%d-%H-%M-%S")
  set(GUDHI_USER_VERSION_DIR ${CMAKE_CURRENT_BINARY_DIR}/${DATE_AND_TIME}_GUDHI_${GUDHI_VERSION})
endif()

add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
                   make_directory ${GUDHI_USER_VERSION_DIR}
                   COMMENT "user_version creation in ${GUDHI_USER_VERSION_DIR}")

foreach(GUDHI_MODULE ${GUDHI_MODULES_FULL_LIST})
  set(GUDHI_DOXYGEN_IMAGE_PATH "${GUDHI_DOXYGEN_IMAGE_PATH}    doc/${GUDHI_MODULE}/ \\  \n")
endforeach(GUDHI_MODULE ${GUDHI_MODULES_FULL_LIST})

# Generate Doxyfile for Doxygen - cf. root CMakeLists.txt for explanation
configure_file(${CMAKE_SOURCE_DIR}/src/Doxyfile.in "${CMAKE_CURRENT_BINARY_DIR}/src/Doxyfile" @ONLY)
add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
        copy ${CMAKE_CURRENT_BINARY_DIR}/src/Doxyfile ${GUDHI_USER_VERSION_DIR}/Doxyfile)

# Generate bib files for Doxygen - cf. root CMakeLists.txt for explanation
string(TIMESTAMP GUDHI_VERSION_YEAR "%Y")
configure_file(${CMAKE_SOURCE_DIR}/biblio/how_to_cite_gudhi.bib.in "${CMAKE_CURRENT_BINARY_DIR}/biblio/how_to_cite_gudhi.bib" @ONLY)
file(COPY "${CMAKE_SOURCE_DIR}/biblio/bibliography.bib" DESTINATION "${CMAKE_CURRENT_BINARY_DIR}/biblio/")

# append cgal citation inside bibliography - sphinx cannot deal with more than one bib file
file(READ "${CMAKE_SOURCE_DIR}/biblio/how_to_cite_cgal.bib" CGAL_CITATION_CONTENT)
file(APPEND "${CMAKE_CURRENT_BINARY_DIR}/biblio/bibliography.bib" "${CGAL_CITATION_CONTENT}")

# Copy biblio directory for user version
add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
                   copy_directory ${CMAKE_CURRENT_BINARY_DIR}/biblio ${GUDHI_USER_VERSION_DIR}/biblio)

add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
                   copy ${CMAKE_SOURCE_DIR}/README.md ${GUDHI_USER_VERSION_DIR}/README.md)
add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
                   copy ${CMAKE_SOURCE_DIR}/LICENSE ${GUDHI_USER_VERSION_DIR}/LICENSE)
add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
                   copy ${CMAKE_SOURCE_DIR}/src/CMakeLists.txt ${GUDHI_USER_VERSION_DIR}/CMakeLists.txt)
add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
                   copy ${CMAKE_SOURCE_DIR}/src/GUDHIConfigVersion.cmake.in ${GUDHI_USER_VERSION_DIR}/GUDHIConfigVersion.cmake.in)
add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
                   copy ${CMAKE_SOURCE_DIR}/src/GUDHIConfig.cmake.in ${GUDHI_USER_VERSION_DIR}/GUDHIConfig.cmake.in)
add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
                   copy ${CMAKE_SOURCE_DIR}/CMakeGUDHIVersion.txt ${GUDHI_USER_VERSION_DIR}/CMakeGUDHIVersion.txt)

# As cython generates .cpp files in source, we have to copy all except cpp files from python directory
file(GLOB_RECURSE PYTHON_FILES ${CMAKE_SOURCE_DIR}/${GUDHI_PYTHON_PATH}/*)
foreach(PYTHON_FILE ${PYTHON_FILES})
  get_filename_component(PYTHON_FILE_EXT ${PYTHON_FILE} EXT)
  if (NOT "${PYTHON_FILE_EXT}" STREQUAL ".cpp")
    string(REPLACE "${CMAKE_SOURCE_DIR}/${GUDHI_PYTHON_PATH}/" "" RELATIVE_PYTHON_FILE ${PYTHON_FILE})
    add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
                   copy ${PYTHON_FILE} ${GUDHI_USER_VERSION_DIR}/python/${RELATIVE_PYTHON_FILE})
  endif()
endforeach()

add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
                   copy_directory ${CMAKE_SOURCE_DIR}/data ${GUDHI_USER_VERSION_DIR}/data)
add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
                   copy_directory ${CMAKE_SOURCE_DIR}/src/cmake ${GUDHI_USER_VERSION_DIR}/cmake)
add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
                   copy_directory ${CMAKE_SOURCE_DIR}/src/GudhUI ${GUDHI_USER_VERSION_DIR}/GudhUI)

if(HERA_WASSERSTEIN_INCLUDE_DIR STREQUAL HERA_WASSERSTEIN_INTERNAL_INCLUDE_DIR OR
    HERA_BOTTLENECK_INCLUDE_DIR STREQUAL HERA_BOTTLENECK_INTERNAL_INCLUDE_DIR)
  add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
                     copy_directory ${CMAKE_SOURCE_DIR}/ext/hera ${GUDHI_USER_VERSION_DIR}/ext/hera)
endif()

set(GUDHI_DIRECTORIES "doc;example;concept;utilities")

set(GUDHI_INCLUDE_DIRECTORIES "include/gudhi")

foreach(GUDHI_MODULE ${GUDHI_MODULES_FULL_LIST})
  foreach(GUDHI_DIRECTORY ${GUDHI_DIRECTORIES})
    # Find files
    file(GLOB GUDHI_FILES ${CMAKE_SOURCE_DIR}/src/${GUDHI_MODULE}/${GUDHI_DIRECTORY}/*)

    foreach(GUDHI_FILE ${GUDHI_FILES})
      get_filename_component(GUDHI_FILE_NAME ${GUDHI_FILE} NAME)
      # GUDHI_FILE can be a file or a directory
      if(IS_DIRECTORY ${GUDHI_FILE})
        add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
                           copy_directory ${GUDHI_FILE} ${GUDHI_USER_VERSION_DIR}/${GUDHI_DIRECTORY}/${GUDHI_MODULE}/${GUDHI_FILE_NAME})
      else()
        add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
                           copy ${GUDHI_FILE} ${GUDHI_USER_VERSION_DIR}/${GUDHI_DIRECTORY}/${GUDHI_MODULE}/${GUDHI_FILE_NAME})
      endif()
    endforeach()
  endforeach(GUDHI_DIRECTORY ${GUDHI_DIRECTORIES})

  foreach(GUDHI_INCLUDE_DIRECTORY ${GUDHI_INCLUDE_DIRECTORIES})
    # include files
    file(GLOB GUDHI_INCLUDE_FILES ${CMAKE_SOURCE_DIR}/src/${GUDHI_MODULE}/${GUDHI_INCLUDE_DIRECTORY}/*)

    foreach(GUDHI_INCLUDE_FILE ${GUDHI_INCLUDE_FILES})
      get_filename_component(GUDHI_INCLUDE_FILE_NAME ${GUDHI_INCLUDE_FILE} NAME)
      # GUDHI_INCLUDE_FILE can be a file or a directory
      if(IS_DIRECTORY ${GUDHI_INCLUDE_FILE})
        add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
                           copy_directory ${GUDHI_INCLUDE_FILE} ${GUDHI_USER_VERSION_DIR}/${GUDHI_INCLUDE_DIRECTORY}/${GUDHI_INCLUDE_FILE_NAME})
      else()
        add_custom_command(TARGET user_version PRE_BUILD COMMAND ${CMAKE_COMMAND} -E
                           copy ${GUDHI_INCLUDE_FILE} ${GUDHI_USER_VERSION_DIR}/${GUDHI_INCLUDE_DIRECTORY}/${GUDHI_INCLUDE_FILE_NAME})
      endif()
    endforeach()
  endforeach(GUDHI_INCLUDE_DIRECTORY ${GUDHI_INCLUDE_DIRECTORIES})

endforeach(GUDHI_MODULE ${GUDHI_MODULES_FULL_LIST})