cmake_minimum_required( VERSION 3.12.4 )
project( KiT-RT VERSION 0.1.0 LANGUAGES CXX )

### OPTIONS #####################################
option( BUILD_TESTS "builds all available unit tests" OFF )
option( BUILD_GUI "additionally builds a user interface" OFF )
#################################################

### COMPILER ####################################
set( CMAKE_CXX_STANDARD 17 )
set( CMAKE_CXX_STANDARD_REQUIRED ON )
set( KITRT_RELEASE_OPTIONS -march=native -w )
set( KITRT_RELWITHDEBINFO_OPTIONS -march=native -pg -no-pie )
set( KITRT_DEBUG_OPTIONS -Wall -Wextra -Wpedantic )
#################################################


### LIBRARIES ###################################
set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake ${CMAKE_MODULE_PATH})

find_package( OpenMP REQUIRED )

find_package( MPI REQUIRED )
include_directories( ${MPI_INCLUDE_PATH} )

find_package( LAPACK REQUIRED )
include_directories( ${LAPACK_INCLUDE_DIR} )

find_package( BLAS )

find_package( VTK COMPONENTS vtkIOGeometry vtkFiltersCore REQUIRED )

find_package( Python3 COMPONENTS Interpreter Development NumPy REQUIRED )
include_directories( ${Python3_INCLUDE_DIRS} ${Python3_NumPy_INCLUDE_DIRS} )
add_compile_definitions( KITRT_PYTHON_PATH="${CMAKE_SOURCE_DIR}/python" )

add_compile_definitions( BLAZE_USE_SHARED_MEMORY_PARALLELIZATION=0 )
message( STATUS "Blaze: Shared memory parallelization disabled" )
if( BLAS_FOUND )
    message( STATUS "Blaze: BLAS mode enabled" )
    add_compile_definitions( BLAZE_BLAS_MODE=1 )
    include_directories( ${BLAS_INCLUDE_DIR} )
else()
    message( STATUS "Blaze: BLAS mode disabled" )
    add_compile_definitions( BLAZE_BLAS_MODE=0 )
endif()
include( blaze-cache-config )
include_directories( ${CMAKE_SOURCE_DIR}/ext/blaze )

add_compile_definitions( METIS_EXPORT= )
set( DISABLE_PARMETIS_PROGRAMS ON )
set( ParMETIS_PATH ${CMAKE_CURRENT_SOURCE_DIR}/ext/parmetis )
include_directories( ${ParMETIS_PATH}/include )
include_directories( ${ParMETIS_PATH}/metis/include )
add_subdirectory( ${ParMETIS_PATH} )

include_directories( ${CMAKE_SOURCE_DIR}/ext/cpptoml/include )
include_directories( ${CMAKE_SOURCE_DIR}/ext/spdlog/include )

set( CORE_LIBRARIES ${Python3_LIBRARIES} ${LAPACK_LIBRARIES} ${BLAS_LIBRARIES} ${MPI_LIBRARIES} ${VTK_LIBRARIES} OpenMP::OpenMP_CXX parmetis -lstdc++fs )
#################################################


### MISC ########################################
execute_process(
    COMMAND git rev-parse HEAD
    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
    OUTPUT_VARIABLE GIT_HASH
    OUTPUT_STRIP_TRAILING_WHITESPACE
)
add_compile_definitions( GIT_HASH="${GIT_HASH}" )
#################################################


### BUILD KIT-RT ################################
file( GLOB_RECURSE SRCS RELATIVE ${CMAKE_SOURCE_DIR} "src/*.cpp" "include/*.h" )
include_directories( ${CMAKE_SOURCE_DIR}/include )
add_executable( ${CMAKE_PROJECT_NAME} ${SRCS} ${EXT_SRCS} )
target_link_libraries( ${CMAKE_PROJECT_NAME} ${CORE_LIBRARIES} )
set_target_properties( ${CMAKE_PROJECT_NAME} PROPERTIES RUNTIME_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/bin" )
target_compile_options( ${CMAKE_PROJECT_NAME} PUBLIC "$<$<CONFIG:DEBUG>:${KITRT_DEBUG_OPTIONS}>" )
target_compile_options( ${CMAKE_PROJECT_NAME} PUBLIC "$<$<CONFIG:RELWITHDEBINFO>:${KITRT_RELWITHDEBINFO_OPTIONS}>" )
target_compile_options( ${CMAKE_PROJECT_NAME} PUBLIC "$<$<CONFIG:RELEASE>:${KITRT_RELEASE_OPTIONS}>" )
#################################################


### BUILD UNIT TESTS ############################
if( BUILD_TESTS )
    include( CTest )
    set( CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/ext/Catch2/contrib ${CMAKE_MODULE_PATH} )
    include( Catch )
    set( CATCH_INCLUDE_DIR ${CMAKE_SOURCE_DIR}/ext/Catch2/single_include/catch2 )
    add_library( Catch INTERFACE )
    target_include_directories( Catch INTERFACE ${CATCH_INCLUDE_DIR} )
    file( GLOB_RECURSE TEST_SRCS RELATIVE ${CMAKE_SOURCE_DIR} "tests/*.cpp" )
    list( REMOVE_ITEM SRCS "src/main.cpp" )
    add_executable( unit_tests ${TEST_SRCS} ${SRCS} ${EXT_SRCS} )
    target_compile_definitions( unit_tests PUBLIC BUILD_TESTING )
    target_compile_definitions( unit_tests PUBLIC TESTS_PATH="${CMAKE_SOURCE_DIR}/tests/" )
    target_link_libraries( unit_tests Catch ${CORE_LIBRARIES} )
    target_compile_options( unit_tests PUBLIC "$<$<CONFIG:DEBUG>:${KITRT_DEBUG_OPTIONS}>" )
    if( CMAKE_COMPILER_IS_GNUCXX )
        set( CODE_COVERAGE_OPTIONS --coverage -g -O0 -w )
        target_compile_options( unit_tests PUBLIC "$<$<CONFIG:DEBUG>:${CODE_COVERAGE_OPTIONS}>" )
        target_link_libraries( unit_tests Catch gcov )
    endif()
    target_compile_options( unit_tests PUBLIC "$<$<CONFIG:RELWITHDEBINFO>:${KITRT_RELWITHDEBINFO_OPTIONS}>" )
    target_compile_options( unit_tests PUBLIC "$<$<CONFIG:RELEASE>:${KITRT_RELEASE_OPTIONS}>" )
    catch_discover_tests( unit_tests )
endif()
#################################################


### BUILD GUI ###################################
if( BUILD_GUI )
    find_package( Qt5 COMPONENTS Core Widgets Gui OpenGL REQUIRED )
    find_package( VTK COMPONENTS vtkGUISupportQt vtkInteractionStyle vtkInteractionWidgets vtkRenderingAnnotation vtkRenderingCore vtkRenderingFreeType vtkRenderingOpenGL2 REQUIRED )
    include_directories( ${CMAKE_SOURCE_DIR}/include/gui )
    file( GLOB_RECURSE GUI_SRCS RELATIVE ${CMAKE_SOURCE_DIR} "src/gui/*" )
    file( GLOB_RECURSE GUI_INCL RELATIVE ${CMAKE_SOURCE_DIR} "include/gui/*" )
    add_executable( ${CMAKE_PROJECT_NAME}_gui ${SRCS} ${EXT_SRCS} ${GUI_SRCS} ${GUI_INCL})
    target_compile_definitions( ${CMAKE_PROJECT_NAME}_gui PUBLIC BUILD_GUI )
    set_target_properties( ${CMAKE_PROJECT_NAME}_gui PROPERTIES AUTOMOC ON )
    set_target_properties( ${CMAKE_PROJECT_NAME}_gui PROPERTIES AUTOUIC ON )
    set_target_properties( ${CMAKE_PROJECT_NAME}_gui PROPERTIES AUTORCC ON )
    set( GUI_LIBRARIES Qt5::Core Qt5::Widgets Qt5::Gui Qt5::OpenGL ${VTK_LIBRARIES} )
    target_link_libraries( ${CMAKE_PROJECT_NAME}_gui ${CORE_LIBRARIES} ${GUI_LIBRARIES} )
    set_target_properties( ${CMAKE_PROJECT_NAME}_gui PROPERTIES RUNTIME_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/bin" )
    target_compile_options( ${CMAKE_PROJECT_NAME}_gui PUBLIC "$<$<CONFIG:DEBUG>:${KITRT_DEBUG_OPTIONS}>" )
    target_compile_options( ${CMAKE_PROJECT_NAME}_gui PUBLIC "$<$<CONFIG:RELWITHDEBINFO>:${KITRT_RELWITHDEBINFO_OPTIONS}>" )
    target_compile_options( ${CMAKE_PROJECT_NAME}_gui PUBLIC "$<$<CONFIG:RELEASE>:${KITRT_RELEASE_OPTIONS}>" )
endif()
#################################################