#
# DCMTK
#

superbuild_include_once()

set(proj DCMTK)

set(${proj}_DEPENDENCIES "")

superbuild_include_dependencies(PROJECT_VAR proj)

if(${CMAKE_PROJECT_NAME}_USE_SYSTEM_${proj})
  unset(DCMTK_DIR CACHE)
  find_package(DCMTK REQUIRED)
endif()

# Sanity checks
if(DEFINED DCMTK_DIR AND NOT EXISTS ${DCMTK_DIR})
  message(FATAL_ERROR "DCMTK_DIR variable is defined but corresponds to non-existing directory")
endif()

if(NOT DEFINED DCMTK_DIR AND NOT ${CMAKE_PROJECT_NAME}_USE_SYSTEM_${proj})
  set(revision_tag ae3b946f6e6231)
  if(${proj}_REVISION_TAG)
    set(revision_tag ${${proj}_REVISION_TAG})
  endif()

  set(location_args )
  if(${proj}_URL)
    set(location_args URL ${${proj}_URL})
  elseif(${proj}_GIT_REPOSITORY)
    set(location_args GIT_REPOSITORY ${${proj}_GIT_REPOSITORY}
                      GIT_TAG ${revision_tag})
  else()
    set(location_args GIT_REPOSITORY "${git_protocol}://git.dcmtk.org/dcmtk.git"
                      GIT_TAG ${revision_tag})
  endif()

  set(ep_project_include_arg)
  if(CTEST_USE_LAUNCHERS)
    set(ep_project_include_arg
      "-DCMAKE_PROJECT_DCMTK_INCLUDE:FILEPATH=${CMAKE_ROOT}/Modules/CTestUseLaunchers.cmake")
  endif()

  ExternalProject_Add(${proj}
    ${${proj}_EXTERNAL_PROJECT_ARGS}
    SOURCE_DIR ${CMAKE_BINARY_DIR}/${proj}
    BINARY_DIR ${proj}-build
    PREFIX ${proj}${ep_suffix}
    ${location_args}
    CMAKE_GENERATOR ${gen}
    UPDATE_COMMAND ""
    BUILD_COMMAND ""
    LIST_SEPARATOR ${sep}
    CMAKE_ARGS
      -DDCMTK_INSTALL_BINDIR:STRING=bin/${CMAKE_CFG_INTDIR}
      -DDCMTK_INSTALL_LIBDIR:STRING=lib/${CMAKE_CFG_INTDIR}
    CMAKE_CACHE_ARGS
      ${ep_common_cache_args}
      ${ep_project_include_arg}
      -DBUILD_SHARED_LIBS:BOOL=OFF
      -DDCMTK_WITH_DOXYGEN:BOOL=OFF
      -DDCMTK_WITH_ZLIB:BOOL=OFF # see github issue #25
      -DDCMTK_WITH_OPENSSL:BOOL=OFF # see github issue #25
      -DDCMTK_WITH_PNG:BOOL=OFF # see github issue #25
      -DDCMTK_WITH_TIFF:BOOL=OFF  # see github issue #25
      -DDCMTK_WITH_XML:BOOL=OFF  # see github issue #25
      -DDCMTK_WITH_ICONV:BOOL=OFF  # see github issue #178
      -DDCMTK_FORCE_FPIC_ON_UNIX:BOOL=ON
      -DDCMTK_OVERWRITE_WIN32_COMPILER_FLAGS:BOOL=OFF
    DEPENDS
      ${${proj}_DEPENDENCIES}
    )
  set(DCMTK_DIR ${ep_install_dir})

# This was used during heavy development on DCMTK itself.
# Disabling it for now. (It also leads to to build errors
# with the XCode CMake generator on Mac).
#
#    ExternalProject_Add_Step(${proj} force_rebuild
#      COMMENT "Force ${proj} re-build"
#      DEPENDERS build    # Steps that depend on this step
#      ALWAYS 1
#      WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/${proj}-build
#      DEPENDS
#        ${proj_DEPENDENCIES}
#      )

  # Since DCMTK is statically build, there is not need to add its corresponding
  # library output directory to CTK_EXTERNAL_LIBRARY_DIRS

else()
  superbuild_add_empty_external_project(${proj} "${${proj}_DEPENDENCIES}")
endif()

mark_as_superbuild(
  VARS DCMTK_DIR:PATH
  LABELS "FIND_PACKAGE"
  )