# Initialize CMake ################################################################################

CMake_Minimum_Required            ( VERSION 3.12.0 FATAL_ERROR )

# Set CMAKE_BUILD_TYPE
If                                ( NOT CMAKE_BUILD_TYPE )
    Set                               ( CMAKE_BUILD_TYPE "Release" CACHE STRING "Choose the type of build!" FORCE )
EndIf                             ( NOT CMAKE_BUILD_TYPE )
Set_Property                      ( CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS Debug Release RelWithDebInfo MinSizeRel )

# Set CMAKE_MODULE_PATH
If                                ( EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/cmake/" )
    Set                               ( CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH}
                                                          "${CMAKE_CURRENT_SOURCE_DIR}/cmake/" )
EndIf                             ( )
If                                ( EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/cmake/" )
    Set                               ( CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH}
                                                          "${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules" )
EndIf                             ( )

# Project #########################################################################################

# Version
Set                               ( LIBHELLOWORLD_VERSION_MAJOR 1 )
Set                               ( LIBHELLOWORLD_VERSION_MINOR 0 )
Set                               ( LIBHELLOWORLD_VERSION_PATCH 0 )
Set                               ( LIBHELLOWORLD_VERSION_BUILD 0 )
Set                               ( LIBHELLOWORLD_VERSION_SHORT "${LIBHELLOWORLD_VERSION_MAJOR}.${LIBHELLOWORLD_VERSION_MINOR}" )
Set                               ( LIBHELLOWORLD_VERSION "${LIBHELLOWORLD_VERSION_SHORT}.${LIBHELLOWORLD_VERSION_PATCH}.${LIBHELLOWORLD_VERSION_BUILD}" )
Set                               ( LIBHELLOWORLD_NAME "libhelloworld-${LIBHELLOWORLD_VERSION_SHORT}" )

# Install directories
Set                               ( LIBHELLOWORLD_INSTALL_DIR_INCLUDE "include/${LIBHELLOWORLD_NAME}" )
Set                               ( LIBHELLOWORLD_INSTALL_DIR_LIB "lib/${LIBHELLOWORLD_NAME}" )
Set                               ( LIBHELLOWORLD_INSTALL_DIR_SHARE "share/${LIBHELLOWORLD_NAME}" )

# Project
Project                           ( libhelloworld
                                    DESCRIPTION "A simple library"
                                    VERSION "${LIBHELLOWORLD_VERSION}" )
Include                           ( CTest )

# C Standard
Set                               ( CMAKE_C_STANDARD   11 )
Set                               ( CMAKE_CXX_STANDARD 17 )
Set                               ( CMAKE_C_STANDARD_REQUIRED   ON )
Set                               ( CMAKE_CXX_STANDARD_REQUIRED ON )

# Subdirectories
Add_SubDirectory                  ( ${CMAKE_CURRENT_SOURCE_DIR}/src )
Add_SubDirectory                  ( ${CMAKE_CURRENT_SOURCE_DIR}/test )

# Install
Include                           ( CMakePackageConfigHelpers )
Write_Basic_Package_Version_File  ( "${CMAKE_CURRENT_BINARY_DIR}/cmake/libhelloworld-config-version.cmake"
                                    VERSION ${LIBHELLOWORLD_VERSION}
                                    COMPATIBILITY AnyNewerVersion )
Configure_File                    ( "${CMAKE_CURRENT_SOURCE_DIR}/cmake/libhelloworld-config.cmake"
                                    "${CMAKE_CURRENT_BINARY_DIR}/cmake/libhelloworld-config.cmake"
                                    @ONLY )

Set                               ( ConfigPackageLocation "${LIBHELLOWORLD_INSTALL_DIR_SHARE}/cmake" )
Install                           ( EXPORT libhelloworld
                                    DESTINATION ${ConfigPackageLocation} )
Install                           ( FILES
                                      "${CMAKE_CURRENT_BINARY_DIR}/cmake/libhelloworld-config.cmake"
                                      "${CMAKE_CURRENT_BINARY_DIR}/cmake/libhelloworld-config-version.cmake"
                                    DESTINATION
                                      ${ConfigPackageLocation}
                                    COMPONENT
                                      Devel )