cmake_minimum_required (VERSION 3.1 FATAL_ERROR)
project (libtree++ VERSION 0.1.0 LANGUAGES CXX)
set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake/Modules)
include(GNUInstallDirs)
enable_testing()

#cmake options for the project
option(DOXYGEN "Also build the doxygen documentation" OFF)


# set the required c++ standard
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

include(CTest)
find_package(Git)

#check for git submodules
if(GIT_FOUND AND EXISTS "${PROJECT_SOURCE_DIR}/.git")
# Update submodules as needed
    option(GIT_SUBMODULE "Check submodules during build" ON)
    if(GIT_SUBMODULE AND NOT hasParent)
        message(STATUS "Submodule update")
        execute_process(COMMAND ${GIT_EXECUTABLE} submodule update --init --recursive
                        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
                        RESULT_VARIABLE GIT_SUBMOD_RESULT)
        if(NOT GIT_SUBMOD_RESULT EQUAL "0")
            message(FATAL_ERROR "git submodule update --init failed with ${GIT_SUBMOD_RESULT}, please checkout submodules")
        endif()
    endif()
endif()


INCLUDE(ProcessDOXYGEN)
INCLUDE(ProcessGIT)
INCLUDE(add_my_test)

IF(CMAKE_BUILD_TYPE MATCHES DEBUG)
  set(DEBUG 1)
ENDIF(CMAKE_BUILD_TYPE MATCHES DEBUG)

configure_file(${PROJECT_SOURCE_DIR}/src/config.hpp.in ${PROJECT_SOURCE_DIR}/src/config.hpp @ONLY)


set(generated "${PROJECT_SOURCE_DIR}/src/config.hpp")

add_custom_target(clean-generated COMMAND rm -f ${generated})

add_library(tree STATIC
              src/config.hpp
              include/Tree/tree.hpp
              src/Tree/tree.cpp
)

target_include_directories(tree PUBLIC
  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
  $<INSTALL_INTERFACE:include>
  PRIVATE src
)


IF(CMAKE_BUILD_TYPE MATCHES DEBUG)
  target_compile_options(tree PUBLIC -Wall -g -O0 )
ELSE()
    target_compile_options(tree PUBLIC -O4)
    target_compile_options(tree PUBLIC -O4)
ENDIF()

#
# Everything TEST related
#

add_my_test(TEST test_base
           SOURCES tests/test_base.cpp
           LIBS tree
         )

add_my_test(TEST test_add_child
         SOURCES tests/test_add_child.cpp
         LIBS tree
       )

get_property(_mytests GLOBAL PROPERTY _mytests)
FOREACH( _test ${_mytests})

IF(CMAKE_BUILD_TYPE MATCHES DEBUG)
  target_compile_options(${_test} PUBLIC -Wall -g -O0)
ELSE()
    target_compile_options(${_test} PUBLIC -O4)
ENDIF()
ENDFOREACH()