cmake_minimum_required(VERSION 2.6)
project(GUDHIExPersCohom)

# problem with Visual Studio link on Boost program_options
add_definitions( -DBOOST_ALL_NO_LIB )
add_definitions( -DBOOST_ALL_DYN_LINK )

add_executable(plain_homology plain_homology.cpp)
target_link_libraries(plain_homology ${Boost_SYSTEM_LIBRARY})
add_test(plain_homology ${CMAKE_CURRENT_BINARY_DIR}/plain_homology)

add_executable(persistence_from_simple_simplex_tree persistence_from_simple_simplex_tree.cpp)
target_link_libraries(persistence_from_simple_simplex_tree ${Boost_SYSTEM_LIBRARY})
add_test(persistence_from_simple_simplex_tree ${CMAKE_CURRENT_BINARY_DIR}/persistence_from_simple_simplex_tree 1 0)

add_executable(rips_persistence rips_persistence.cpp)
target_link_libraries(rips_persistence ${Boost_SYSTEM_LIBRARY} ${Boost_PROGRAM_OPTIONS_LIBRARY})
   
add_test(rips_persistence_3 ${CMAKE_CURRENT_BINARY_DIR}/rips_persistence ${CMAKE_SOURCE_DIR}/data/points/Kl.txt -r 0.25 -d 3 -p 3 -m 100)
   
add_executable(persistence_from_file persistence_from_file.cpp)
target_link_libraries(persistence_from_file ${Boost_SYSTEM_LIBRARY} ${Boost_PROGRAM_OPTIONS_LIBRARY})
add_test(persistence_from_file_3_2_0 ${CMAKE_CURRENT_BINARY_DIR}/persistence_from_file ${CMAKE_SOURCE_DIR}/data/points/bunny_5000.st -p 2 -m 0)
add_test(persistence_from_file_3_3_100 ${CMAKE_CURRENT_BINARY_DIR}/persistence_from_file ${CMAKE_SOURCE_DIR}/data/points/bunny_5000.st -p 3 -m 100)

if(GMPXX_FOUND AND GMP_FOUND)
  message("GMPXX_LIBRARIES = ${GMPXX_LIBRARIES}")
  message("GMP_LIBRARIES = ${GMP_LIBRARIES}")

  add_executable(rips_multifield_persistence rips_multifield_persistence.cpp )
  target_link_libraries(rips_multifield_persistence ${Boost_SYSTEM_LIBRARY} ${Boost_PROGRAM_OPTIONS_LIBRARY} ${GMPXX_LIBRARIES} ${GMP_LIBRARIES})
  add_test(rips_multifield_persistence_2_71 ${CMAKE_CURRENT_BINARY_DIR}/rips_multifield_persistence ${CMAKE_SOURCE_DIR}/data/points/Kl.txt -r 0.25 -d 3 -p 2 -q 71 -m 100)

  add_executable ( performance_rips_persistence performance_rips_persistence.cpp )
  target_link_libraries(performance_rips_persistence ${Boost_SYSTEM_LIBRARY} ${Boost_PROGRAM_OPTIONS_LIBRARY} ${GMPXX_LIBRARIES} ${GMP_LIBRARIES})

  if(CGAL_FOUND)
    add_executable(alpha_shapes_persistence alpha_shapes_persistence.cpp)
    target_link_libraries(alpha_shapes_persistence ${Boost_SYSTEM_LIBRARY} ${GMPXX_LIBRARIES} ${GMP_LIBRARIES} ${CGAL_LIBRARY})
    add_test(alpha_shapes_persistence_2_0_5 ${CMAKE_CURRENT_BINARY_DIR}/alpha_shapes_persistence ${CMAKE_SOURCE_DIR}/data/points/bunny_5000 2 0.5)
    #add_test(alpha_shapes_persistence_3_3_100 ${CMAKE_CURRENT_BINARY_DIR}/alpha_shapes_persistence ${CMAKE_SOURCE_DIR}/data/points/bunny_5000.st -p 3 -m 100)

    if (NOT CGAL_VERSION VERSION_LESS 4.7.0)
      message(STATUS "CGAL version: ${CGAL_VERSION}.")

      include( ${CGAL_USE_FILE} )
      # In CMakeLists.txt, when include(${CGAL_USE_FILE}), CXX_FLAGS are overwritten.
      # cf. http://doc.cgal.org/latest/Manual/installation.html#title40
      # A workaround is to add "-std=c++11" again.
      # A fix would be to use https://cmake.org/cmake/help/v3.1/prop_gbl/CMAKE_CXX_KNOWN_FEATURES.html 
      # or even better https://cmake.org/cmake/help/v3.1/variable/CMAKE_CXX_STANDARD.html
      # but it implies to use cmake version 3.1 at least.
      if(NOT MSVC)
        include(CheckCXXCompilerFlag)
        CHECK_CXX_COMPILER_FLAG(-std=c++11 COMPILER_SUPPORTS_CXX11)
        if(COMPILER_SUPPORTS_CXX11)
          set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
        endif()
      endif()
      # - End of workaround

      find_package(Eigen3 3.1.0)
      if (EIGEN3_FOUND)
        message(STATUS "Eigen3 version: ${EIGEN3_VERSION}.")
        include( ${EIGEN3_USE_FILE} )
      
        add_executable (alpha_complex_persistence alpha_complex_persistence.cpp)
        target_link_libraries(alpha_complex_persistence  ${Boost_SYSTEM_LIBRARY} ${CGAL_LIBRARY} ${Boost_PROGRAM_OPTIONS_LIBRARY})

      else()
        message(WARNING "Eigen3 not found. Version 3.1.0 is required for Alpha shapes feature.")
      endif()
    else()
      message(WARNING "CGAL version: ${CGAL_VERSION} is too old to compile Alpha shapes feature. Version 4.6.0 is required.")
    endif ()
  else()
    # message(WARNING "CGAL not found.")
  endif()
   
else()
  # message(WARNING "GMP not found.")
endif()