#
# PythonQt
#
SET(PythonQt_DEPENDS)
ctkMacroShouldAddExternalProject(PYTHONQT_LIBRARIES add_project)
IF(${add_project})
  
  # Sanity checks
  IF(DEFINED PYTHONQT_INSTALL_DIR AND NOT EXISTS ${PYTHONQT_INSTALL_DIR})
    MESSAGE(FATAL_ERROR "PYTHONQT_INSTALL_DIR variable is defined but corresponds to non-existing directory")
  ENDIF()

  SET(PythonQt_enabling_variable PYTHONQT_LIBRARIES)
  
  SET(proj PythonQt)
  SET(proj_DEPENDENCIES)
  
  SET(PythonQt_DEPENDS ${proj})
  
  IF(NOT DEFINED PYTHONQT_INSTALL_DIR)
  #   MESSAGE(STATUS "Adding project:${proj}")
    
    SET(ep_PythonQt_args)
    
    # Should PythonQt use VTK 
    IF(CTK_LIB_Scripting/Python/Core_PYTHONQT_USE_VTK)
      LIST(APPEND proj_DEPENDENCIES VTK)
      LIST(APPEND ep_PythonQt_args -DVTK_DIR:PATH=${VTK_DIR})
    ENDIF()
    LIST(APPEND ep_PythonQt_args -DPythonQt_USE_VTK:BOOL=${CTK_LIB_Scripting/Python/Core_PYTHONQT_USE_VTK})
    
    # Enable Qt libraries PythonQt wrapping if required
    foreach(qtlib core gui network opengl sql svg uitools webkit xml xmlpatterns)
      STRING(TOUPPER ${qtlib} qtlib_uppercase)
      LIST(APPEND ep_PythonQt_args -DPythonQt_Wrap_Qt${qtlib}:BOOL=${CTK_LIB_Scripting/Python/Core_PYTHONQT_WRAP_QT${qtlib_uppercase}})
    endforeach()

    # Python is required
    FIND_PACKAGE(PythonLibs)
    IF(NOT PYTHONLIBS_FOUND)
      MESSAGE(FATAL_ERROR "error: Python is required to build ${PROJECT_NAME}")
    ENDIF()

    # Set CMake OSX variable to pass down the external project
    set(CMAKE_OSX_EXTERNAL_PROJECT_ARGS)
    if(APPLE)
      list(APPEND CMAKE_OSX_EXTERNAL_PROJECT_ARGS
        -DCMAKE_OSX_ARCHITECTURES=${CMAKE_OSX_ARCHITECTURES}
        -DCMAKE_OSX_SYSROOT=${CMAKE_OSX_SYSROOT}
        -DCMAKE_OSX_DEPLOYMENT_TARGET=${CMAKE_OSX_DEPLOYMENT_TARGET})
    endif()
    
    SET(revision_tag 3171a94e16ba9bfee137)
    IF(${proj}_REVISION_TAG)
      SET(revision_tag ${${proj}_REVISION_TAG})
    ENDIF()

    ExternalProject_Add(${proj}
      SOURCE_DIR ${CMAKE_BINARY_DIR}/${proj}
      BINARY_DIR ${proj}-build
      PREFIX ${proj}${ep_suffix}
      GIT_REPOSITORY "${git_protocol}://github.com/commontk/PythonQt.git"
      GIT_TAG ${revision_tag}
      CMAKE_GENERATOR ${gen}
      UPDATE_COMMAND ""
      BUILD_COMMAND ""
      CMAKE_ARGS
        -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
        -DCMAKE_CXX_FLAGS:STRING=${ep_common_cxx_flags}
        #-DCMAKE_C_FLAGS:STRING=${ep_common_c_flags} # Not used
        -DCMAKE_INSTALL_PREFIX:PATH=${ep_install_dir}
        ${CMAKE_OSX_EXTERNAL_PROJECT_ARGS}
        -DQT_QMAKE_EXECUTABLE:FILEPATH=${QT_QMAKE_EXECUTABLE}
        -DPYTHON_INCLUDE_DIR:PATH=${PYTHON_INCLUDE_DIR}
        -DPYTHON_LIBRARY:FILEPATH=${PYTHON_LIBRARY}
        ${ep_PythonQt_args}
      DEPENDS
        ${proj_DEPENDENCIES}
      )
    SET(PYTHONQT_INSTALL_DIR ${ep_install_dir})
    
    # Since the full path of PythonQt library is used, there is not need to add 
    # its corresponding library output directory to CTK_EXTERNAL_LIBRARY_DIRS
  
  ELSE()
    ctkMacroEmptyExternalProject(${proj} "${proj_DEPENDENCIES}")
  ENDIF()
    
  LIST(APPEND CTK_SUPERBUILD_EP_ARGS 
    -DPYTHONQT_INSTALL_DIR:PATH=${PYTHONQT_INSTALL_DIR}
    -DPYTHON_EXECUTABLE:FILEPATH=${PYTHON_EXECUTABLE}   # FindPythonInterp expects PYTHON_EXECUTABLE variable to be defined
    -DPYTHON_INCLUDE_DIR:PATH=${PYTHON_INCLUDE_DIR}     # FindPythonQt expects PYTHON_INCLUDE_DIR variable to be defined
    -DPYTHON_LIBRARY:FILEPATH=${PYTHON_LIBRARY}         # FindPythonQt expects PYTHON_LIBRARY variable to be defined
    )

  SET(${PythonQt_enabling_variable}_INCLUDE_DIRS PYTHONQT_INCLUDE_DIR PYTHON_INCLUDE_DIRS)
  SET(${PythonQt_enabling_variable}_FIND_PACKAGE_CMD PythonQt)
ENDIF()