include(CheckCCompilerFlag)
include(CheckCXXCompilerFlag)

set(CMAKE_C_FLAGS "")

check_c_compiler_flag("-Wno-sign-compare" C_NO_SIGN_COMPARE)
if (C_NO_SIGN_COMPARE)
	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-sign-compare")
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-sign-compare")
endif()

check_c_compiler_flag("-Wno-shadow" C_NO_SHADOW)
if (C_NO_SHADOW)
	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-shadow")
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-shadow")
endif()

check_c_compiler_flag("-Wno-cast-qual" C_NO_CAST_QUAL)
if (C_NO_CAST_QUAL)
	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-cast-qual")
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-cast-qual")
endif()

if (USE_STACKTRACES)
	add_subdirectory(backward)
endif()
add_subdirectory(benchmark)
add_subdirectory(glm)
add_subdirectory(stb_image)
add_subdirectory(lua54)
add_subdirectory(meshoptimizer)
add_subdirectory(lzfse)
add_subdirectory(gtest)
add_subdirectory(simplecpp)
add_subdirectory(yocto)

find_package(PkgConfig)
if (NOT PkgConfig_FOUND)
message(STATUS "PkgConfig not found")
endif()

set(USE_SDL_VERSION 3 CACHE STRING "SDL version to use (2 or 3)")
set_property(CACHE USE_SDL_VERSION PROPERTY STRINGS 2 3)

if (USE_SDL_VERSION EQUAL 3)
	if (PkgConfig_FOUND)
		pkg_check_modules(SDL3 sdl3)
		if (SDL3_FOUND)
			message(STATUS "SDL3 system wide installation found")
			add_library(sdl3 INTERFACE)
			target_include_directories(sdl3 INTERFACE ${SDL3_INCLUDE_DIRS} ${SDL3_INCLUDE_DIRS}/SDL3 /usr/include/SDL3)
			target_link_libraries(sdl3 INTERFACE ${SDL3_LINK_LIBRARIES})
			add_library(SDL3::SDL3 ALIAS sdl3)
		else()
			set(USE_SDL_VERSION 2 CACHE STRING "SDL version to use (2 or 3)" FORCE)
		endif()
	else()
		set(USE_SDL_VERSION 2 CACHE STRING "SDL version to use (2 or 3)" FORCE)
	endif()
endif()

if (USE_SDL_VERSION EQUAL 2)
	if (NOT USE_LIBS_FORCE_LOCAL)
		if (PkgConfig_FOUND)
			pkg_check_modules(SDL2 sdl2)
			if (SDL2_FOUND)
				message(STATUS "SDL system wide installation found")
			endif()
		endif()
		if (NOT SDL2_FOUND)
			find_package(SDL2)
		endif()
	endif()
	if (SDL2_FOUND OR EMSCRIPTEN)
		add_library(sdl2 INTERFACE)
		target_include_directories(sdl2 INTERFACE ${SDL2_INCLUDE_DIRS})
		target_link_libraries(sdl2 INTERFACE ${SDL2_LINK_LIBRARIES})
		add_library(SDL2::SDL2 ALIAS sdl2)
	else()
		set(SDL_CMAKE_DEBUG_POSTFIX "" CACHE STRING "Name suffix for debug builds" FORCE)
		set(SDL2_DISABLE_INSTALL ON CACHE BOOL "" FORCE)
		set(SDL2_DISABLE_UNINSTALL ON CACHE BOOL "" FORCE)
		set(SDL_STATIC_ENABLED_BY_DEFAULT ON CACHE BOOL "" FORCE)
		set(SDL_SHARED_ENABLED_BY_DEFAULT OFF CACHE BOOL "" FORCE)
		set(SDL_TEST_ENABLED_BY_DEFAULT OFF CACHE BOOL "" FORCE)
		set(SDL_FORCE_STATIC_VCRT ON CACHE BOOL "" FORCE)
		add_subdirectory(sdl2)
		add_library(sdl2 INTERFACE)
		target_link_libraries(sdl2 INTERFACE SDL2::SDL2main SDL2-static)
	endif()
	set(SDL_PCH
		<SDL.h>
		<SDL_stdinc.h>
		<SDL_atomic.h>
	)
	target_precompile_headers(sdl2 INTERFACE ${SDL_PCH})
endif()