cmake_minimum_required(VERSION 3.22)

project(kge LANGUAGES CXX VERSION 0.0.1)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

include(FetchContent)
FetchContent_Declare(
		klib
		GIT_REPOSITORY https://git.wntrmute.dev/kyle/klib
		GIT_TAG        master
		FIND_PACKAGE_ARGS NAMES klib
)
FetchContent_MakeAvailable(klib)

find_package(SDL2 REQUIRED)
find_package(OpenGL REQUIRED)
find_package(klib REQUIRED)
find_package(Freetype)
if (DEFINED FREETYPE_INCLUDE_DIRS)
	add_definitions(-DIMGUI_ENABLE_FREETYPE)
	set(FREETYPE_SOURCES
		ext/imgui/misc/freetype/imgui_freetype.cpp
		ext/imgui/misc/freetype/imgui_freetype.h)
endif()

if(MSVC)
	add_compile_options("/W4" "$<$<CONFIG:RELEASE>:/O2>")
else()
	add_compile_options("-Wall" "-Wextra" "-Werror" "$<$<CONFIG:RELEASE>:-O3>")
	if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
		add_compile_options("-stdlib=libc++")
	else()
		# nothing special for gcc at the moment
	endif()
endif()

add_library(imgui STATIC
        # Main Imgui files
        ext/imgui/imgui.cpp
        ext/imgui/imgui.h
        ext/imgui/imgui_draw.cpp
        ext/imgui/imgui_tables.cpp
        ext/imgui/imgui_widgets.cpp
        ext/imgui/imgui_demo.cpp

        ext/imgui/backends/imgui_impl_sdl2.cpp
        ext/imgui/backends/imgui_impl_sdl2.h
        ext/imgui/backends/imgui_impl_opengl3.cpp
        ext/imgui/backends/imgui_impl_opengl3.h

	$<IF:$<TARGET_EXISTS:Freetype::Freetype>,${FREETYPE_SOURCES},>)
add_library(imgui::imgui ALIAS imgui)
target_link_libraries(imgui
        PUBLIC
        OpenGL::GL
	$<IF:$<TARGET_EXISTS:Freetype::Freetype>,Freetype::Freetype,>
        $<TARGET_NAME_IF_EXISTS:SDL2::SDL2main>
        $<IF:$<TARGET_EXISTS:SDL2::SDL2>,SDL2::SDL2,SDL2::SDL2-static>)
target_include_directories(imgui PUBLIC
        ext/imgui/
        ext/imgui/backends/
        ext/imgui/misc/freetype
	$<IF:$<TARGET_EXISTS:Freetype::Freetype>,${FREETYPE_INCLUDE_DIRS},>)

include_directories(ext/ ${SDL2_INCLUDE_DIRS} ${KLIB_INCLUDE_DIRS})

configure_file(kge.desktop.in kge.desktop @ONLY)
add_executable(kge
        kge.cc
)
target_link_libraries(kge imgui ${KLIB_LIBRARIES})
install(TARGETS kge RUNTIME DESTINATION bin COMPONENT dist)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/kge.desktop
		DESTINATION share/applications
		COMPONENT dist)

include(CMakePack.txt)