cmake_minimum_required (VERSION 3.1)
project (Particles)
cmake_policy(VERSION 3.3)

set(CMAKE_CXX_STANDARD 14)

###############################################################
# Include FFTW library and header files
###############################################################

# Not the most elegant way
set(FFTW_LIBRARIES "/usr/lib/x86_64-linux-gnu/libfftw3.so")
set(FFTW_INCLUDES "/usr/include")

# Alternative way that does not currently work:
#set(FFTW_LIBRARIES CACHE PATH "library where to search libfftw3")
#find_library(FFTW_LIBRARY libfftw3 ${FFTW_LIBRARIES} /usr/lib)
#set(FFTW_INCLUDES CACHE PATH "path where to search fftw include files")
#find_path(FFTW_INCLUDE fftw3.h ${FFTW_INCLUDES} /usr/include/)

include_directories("${FFTW_INCLUDES}")
message("FFTW_LIBRARIES = ${FFTW_LIBRARIES}")
message("FFTW_INCLUDES = ${FFTW_INCLUDES}")

################################################################
# libpart
################################################################

add_library(part
  compute_boundary.cc
  compute_verlet_integration.cc 
  particle.cc 
  planet.cc
  compute_gravity.cc 
  csv_reader.cc 
  particles_factory_interface.cc 
  planets_factory.cc 
  compute_contact.cc 
  compute_kinetic_energy.cc 
  csv_writer.cc 
  system.cc 
  compute_energy.cc 
  compute_potential_energy.cc 
  ping_pong_ball.cc
  material_point.cc 
  system_evolution.cc 
  ping_pong_balls_factory.cc 
  compute_interaction.cc
  compute_temperature.cc
  material_points_factory.cc 
  )

add_executable(particles main.cc)
target_link_libraries(particles part)

################################################################
# Google test
################################################################

add_subdirectory(googletest)

add_executable(test_kepler test_kepler.cc)
add_executable(test_fft test_fft.cc)
target_link_libraries(test_kepler part gtest_main gtest pthread)
target_link_libraries(test_fft part gtest_main gtest ${FFTW_LIBRARIES} pthread)

################################################################
# Doxygen
################################################################

find_package(Doxygen)
if (DOXYGEN_FOUND)

# to set other options, read: https://cmake.org/cmake/help/v3.9/module/FindDoxygen.html
doxygen_add_docs(
    doxygen
    ${PROJECT_SOURCE_DIR}
    COMMENT "Generate html pages"
)
add_custom_target(doc DEPENDS doxygen)
endif(DOXYGEN_FOUND)