cmake_minimum_required( VERSION 3.17 )
project( OCP )

set( N_PROC 2 CACHE STRING "Number of processes used for generating code")


find_package( LLVM REQUIRED )
find_package( MPI REQUIRED )
find_package( VTK REQUIRED
  COMPONENTS
    CommonCore
    WrappingPythonCore
    RenderingCore
    RenderingOpenGL2
    CommonDataModel
    CommonExecutionModel
    freetype
)
message(STATUS "VTK ${VTK_VERSION} found")
find_package( RapidJSON REQUIRED )
find_package( Clang REQUIRED )

set( Python_FIND_VIRTUALENV FIRST )
find_package( Python 3.9 COMPONENTS Interpreter Development REQUIRED )

# find OCCT and dump symbols
find_package( OpenCASCADE REQUIRED )

foreach(target ${OpenCASCADE_LIBRARIES} )
    get_target_property(loc ${target} IMPORTED_LOCATION_RELEASE)
    list( APPEND occt_libs ${loc} )
endforeach()

execute_process(
    COMMAND
    ${Python_EXECUTABLE}
    dump_symbols.py
    "${occt_libs}"
    )


get_target_property( LIBCLANG_PATH libclang IMPORTED_LOCATION_RELEASE )
get_target_property( VTK_INCLUDE_DIR VTK::CommonCore INTERFACE_INCLUDE_DIRECTORIES )

message( STATUS "Include dirs: ${CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES}")

if(NOT ${CMAKE_SYSTEM_NAME} STREQUAL "Darwin")
    foreach( inc IN LISTS CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES)
        list( APPEND CXX_INCLUDES -i ${inc}/ )
    endforeach()
else()
    list( APPEND CXX_INCLUDES -i /opt/usr/local/include/c++/v1/ -i /opt/usr/local/include/ )
endif()

if(${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
    set(PLATFORM Windows)
elseif(${CMAKE_SYSTEM_NAME} STREQUAL "Darwin")
    set(PLATFORM OSX)
else()
    set(PLATFORM Linux)
endif()

set(ENV{PYTHONPATH} ${CMAKE_SOURCE_DIR}/pywrap )

if( NOT EXISTS ${CMAKE_SOURCE_DIR}/OCP )
    message( STATUS "Running pywrap")
    execute_process(
        COMMAND
            ${Python_EXECUTABLE}
            -m bindgen
            -n ${N_PROC}
            -l ${LIBCLANG_PATH}
            -i ${CLANG_INCLUDE_DIRS}/
            -i ${VTK_INCLUDE_DIR}/
            -i ${CLANG_INSTALL_PREFIX}/lib/clang/${LLVM_VERSION}/include/
            ${CXX_INCLUDES}
            all ocp.toml ${PLATFORM}
        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
        COMMAND_ECHO STDOUT
        RESULT_VARIABLE PYWRAP_RESULT
    )

    if( ${PYWRAP_RESULT} GREATER 0)
        message(FATAL_ERROR "Pywrap call failed")
    endif()

endif()

add_subdirectory( ${CMAKE_SOURCE_DIR}/OCP )