# TODO
# http://www.cmake.org/pipermail/cmake/2003-August/004185.html
# http://www.cmake.org/pipermail/cmake/2003-January/001092.html

INCLUDE_DIRECTORIES(
  ${GDCM_SOURCE_DIR}/src
  ${PYTHON_INCLUDE_PATH}
  ${GDCM_BINARY_DIR}/
)

#-----------------------------------------------------------------------------
# SWIG Wrapping
#

# Since the file gdcm_wrap.cxx does not exist, mark it as GENERATED:
SET_SOURCE_FILES_PROPERTIES(gdcm_wrap.cxx GENERATED)
ADD_LIBRARY(pygdcm gdcm_wrap.cxx)

TARGET_LINK_LIBRARIES(pygdcm 
  ${PYTHON_LIBRARY}
  gdcm
)
# http://www.cmake.org/pipermail/cmake/2003-August/004190.html
# SET_TARGET_PROPERTIES(pygdcm PROPERTIES PREFIX "_")

#-----------------------------------------------------------------------------
# SWIG Wrapping
#

# As of 09/10/2003 there was no FindSWIG.cmake
# later we should use SWIG instead of swig
# Build our custom command :
ADD_CUSTOM_COMMAND(
  TARGET    pygdcm
  COMMAND   swig
  ARGS      -python -c++ -I${GDCM_SOURCE_DIR}/src -o 
            ${GDCM_BINARY_DIR}/gdcmPython/gdcm_wrap.cxx 
            ${GDCM_SOURCE_DIR}/gdcmPython/gdcm.i 
  SOURCE    ${GDCM_SOURCE_DIR}/gdcmPython/gdcm.i
  OUTPUTS   ${GDCM_BINARY_DIR}/gdcmPython/gdcm_wrap.cxx
  COMMENT   "Generating gdcm_wrap.cxx/gdcm.py based on gdcm.i"
)

# This swig command will also outputs gdcm.py :
SET_SOURCE_FILES_PROPERTIES(gdcm.py GENERATED)

#-----------------------------------------------------------------------------
# VTK Wrapping
# 
IF(GDCM_VTK)
  INCLUDE_DIRECTORIES(
    ${GDCM_SOURCE_DIR}/vtk
  )

  SET(vtkgdcmPython_la_SOURCES
      ${GDCM_SOURCE_DIR}/vtk/vtkGdcmReader.cxx
  )
  SET_SOURCE_FILES_PROPERTIES(vtkGdcmReaderPython.cxx GENERATED)
  
  # Configure Python module, which is the plugin itself
  IF (GDCM_WRAP_PYTHON)
    VTK_WRAP_PYTHON2(vtkgdcmPython gdcmfoo
                   ${vtkgdcmPython_la_SOURCES})
    # The C++ files must be made into a C++ library
    ADD_LIBRARY(vtkgdcmPython SHARED ${gdcmfoo})
    # set the libraries to link against
    TARGET_LINK_LIBRARIES (vtkgdcmPython
                           pygdcm
                           vtkgdcm
                           vtkCommonPython
                           vtkIOPython)
  ENDIF (GDCM_WRAP_PYTHON)
  
  #generate a setup.py according to VTK installation 
  #put it in subdir in order to not override old one
  # as it is a pain...override existing file...
  
  GET_FILENAME_COMPONENT(VTKPATH ${VTK_DIR}/../../ ABSOLUTE)
  CONFIGURE_FILE(
      ${GDCM_SOURCE_DIR}/gdcmPython/setup.py.in
      ${GDCM_BINARY_DIR}/setup.py
  )
  #MESSAGE(STATUS ${VTKPATH})
ENDIF(GDCM_VTK)

#-----------------------------------------------------------------------------
# Install stuff:

#Should install in path of PYTHON_LIBRARY and not the default CMAKE_INSTALL_PREFIX

GET_FILENAME_COMPONENT(PYTHON_LIB_INSTALL ${PYTHON_LIBRARY} PATH)
GET_FILENAME_COMPONENT(SITEPACKAGE 
  ${PYTHON_LIB_INSTALL}/../site-packages ABSOLUTE)
#MESSAGE(STATUS ${SITEPACKAGE})
#INSTALL_FILES(/include "\\.h$")
#INSTALL_TARGETS(/lib/ gdcm)

# gdcm.py is a file generated by swig
# then from python you can do import gdcm, and it will load _gdcm.so
#INSTALL_TARGETS(/lib/ gdcm.py)
#INSTALL_PROGRAMS(/lib/ gdcm.py)
#INSTALL_FILES(/lib/ .py gdcm.py)

# When installing swig-generated python module one should pay attention
# to library naming convention, see here for more detail:
# http://www.swig.org/Doc1.3/Python.html#n6
# even with the $swig -module mylib, there is always a trailing underscore added