# A minimum version for cmake command is required.
cmake_minimum_required(VERSION 3.8)

# TODO Add check whether the provided value is valid.


# ===================================================================================================================
# Include a file with default setting. Some of them might be overriden by command line, such as the C or C++ compiler.
# ===================================================================================================================
if(NOT PATH_FILE)
    message(FATAL_ERROR "-DPATH_FILE must be present in the command line and point to a file that specify the paths and settings to use in the build. A default one is defined in cmake/Paths.cmake; feel free to copy and adapt it to your needs.")
endif()

include(${PATH_FILE})


if(MOREFEM_CHECK_UPDATE_GHOSTS_CALL_RELEVANCE)
    message("ADDING FLAG MOREFEM_CHECK_UPDATE_GHOSTS_CALL_RELEVANCE")
    add_definitions(-DMOREFEM_CHECK_UPDATE_GHOSTS_CALL_RELEVANCE)
endif()

if(MOREFEM_EXTENDED_TIME_KEEP)
    message("ADDING FLAG MOREFEM_EXTENDED_TIME_KEEP")
    add_definitions(-DMOREFEM_EXTENDED_TIME_KEEP)
endif()

if(MOREFEM_CHECK_NAN_AND_INF)
    message("ADDING FLAG MOREFEM_CHECK_NAN_AND_INF")
    add_definitions(-DMOREFEM_CHECK_NAN_AND_INF)
endif()


# ===================================================================================================================
# Set some values in the path file that night be overridden by cache variables.
# WARNING: all those calls must occur BEFORE the call to project, so that overriding remains possible.
# ===================================================================================================================

# From https://cmake.org/pipermail/cmake/2008-September/023808.html
# Ensure if the user doesn't specify arenything in command line debug is chosen (CMake default is no optimization and no debug symbol, which is rather useless).
if(DEFINED CMAKE_BUILD_TYPE)
   set(CMAKE_BUILD_TYPE ${CMAKE_BUILD_TYPE} CACHE STRING "Choose the type of
build, options are: None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used) Debug
Release RelWithDebInfo MinSizeRel.")
else()
   set(CMAKE_BUILD_TYPE Debug CACHE STRING "Choose the type of build,
options are: None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used) Debug Release
RelWithDebInfo MinSizeRel.")
endif()

# Set C and CXX compilers from the values read in the setting file. Might be overridden in command line.

if (NOT DEFINED CMAKE_C_COMPILER)
    set(CMAKE_C_COMPILER ${MPI_CC})
endif()

if (NOT DEFINED CMAKE_CXX_COMPILER)
    set(CMAKE_CXX_COMPILER ${MPI_CXX})
endif()


# ===================================================================================================================
# Set project.
# ===================================================================================================================
project( "MoReFEM_CMAKE")

MESSAGE("CC: " ${CC})
MESSAGE("CMAKE_C_COMPILER: " ${CMAKE_C_COMPILER})


set_property(GLOBAL PROPERTY USE_FOLDERS OFF)


set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)

set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)

MESSAGE("Module path: ${CMAKE_MODULE_PATH}")

include(CustomCommands)



# All --all_load in target_link_libraries of executables if STATIC library are chose.
    
if(LIBRARY_TYPE MATCHES STATIC)
    set(ALL_LOAD_FLAG "-all_load")
else()
    set(ALL_LOAD_FLAG "")
endif()

#MESSAGE("ALL_LOAD_FLAG: ${ALL_LOAD_FLAG}")

MESSAGE("Generated with config types: ${CMAKE_CONFIGURATION_TYPES}")

include(compiler)

# Add LTO support in non debug mode.
if (${CMAKE_BUILD_TYPE} STREQUAL "Debug")
    set(CMAKE_INTERPROCEDURAL_OPTIMIZATION FALSE)
else()
    set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
endif()        

include_directories(${CMAKE_CURRENT_SOURCE_DIR}/Sources /
                    ${CMAKE_CURRENT_SOURCE_DIR}/Sources/ThirdParty/Source/Tclap/include /
                    ${OPS_DIR} /
                    ${SELDON_DIR} /
                    ${OPEN_MPI_INCL_DIR} /
                    ${PETSC_GENERAL_INCL_DIR} /
                    ${PETSC_DEBUG_INCL_DIR} /
                    ${PARMETIS_INCL_DIR} /
                    ${LUA_INCL_DIR} /
                    ${BOOST_INCL_DIR}                    
                    )

# TO complete for release mode! (see SCons)
add_definitions(-DOPS_WITH_EXCEPTION)
add_definitions(-DSELDON_WITH_LAPACK -DSELDON_WITH_LAPACK  -DSELDON_WITH_BLAS -DSELDON_WITH_COMPILED_LIBRARY -DSELDON_CHECK_BOUNDS -DSELDON_CHECK_DIMENSIONS)


morefem_find_library(LIB_OPEN_MPI "mpi" ${OPEN_MPI_LIB_DIR} "Openmpi")
morefem_find_library(LIB_OPEN_MPI_CXX "mpi_cxx" ${OPEN_MPI_LIB_DIR} "Openmpi (C++)")
morefem_find_library(LIB_PETSC "petsc" ${PETSC_DEBUG_LIB_DIR} "Petsc")
morefem_find_library(LIB_PARMETIS "parmetis" ${PARMETIS_LIB_DIR} "Parmetis")
morefem_find_library(LIB_LUA "lua" ${LUA_LIB_DIR} "Lua")
morefem_find_library(LIB_BOOST_FILESYSTEM "boost_filesystem" ${BOOST_LIB_DIR} "Boost filesystem")
morefem_find_library(LIB_BOOST_SYSTEM "boost_system" ${BOOST_LIB_DIR} "Boost system")

set(MOREFEM_COMMON_DEP
    ${LIB_OPEN_MPI}
    ${LIB_OPEN_MPI_CXX}
    ${LIB_PETSC} 
    ${LIB_PARMETIS} 
    ${LIB_LUA} 
    ${LIB_BOOST_FILESYSTEM} 
    ${LIB_BOOST_SYSTEM}                      
    "-framework Accelerate" 
)


add_subdirectory(Sources)