cmake_minimum_required(VERSION 3.14)
cmake_policy(SET CMP0046 NEW)
cmake_policy(SET CMP0063 NEW)
cmake_policy(SET CMP0071 NEW)

project(spingle C)

include(CheckCSourceCompiles)

find_package(OpenGL REQUIRED)
find_package(SDL2   REQUIRED)

find_package(PkgConfig)

if(PKG_CONFIG_FOUND)
	pkg_check_modules(FLAC   IMPORTED_TARGET flac>=1.3.3)
	pkg_check_modules(Vorbis IMPORTED_TARGET vorbis>=1.3.6
	                                         vorbisfile>=1.3.6
	                                         ogg>=1.3.4)
	pkg_check_modules(Opus   IMPORTED_TARGET opus>=1.3.1
	                                         opusfile>=0.11
	                                         ogg>=1.3.4)
	pkg_check_modules(MikMod IMPORTED_TARGET libmikmod>=3.3.11)
endif()

check_c_source_compiles(
	"int main(int argc, char *argv[]) {
		static void *const ar[] = {&&c0, &&c1, &&c2, &&c3};
		goto *ar[argc];
		c0: return 1;
		c1: return 2;
		c2: return 3;
		c3: return 4;
		return 0;
	}"
	HAVE_COMPUTED_GOTO)

set(srcs
	source/anorm_dots.h
	source/anorms.h
	source/arch_def.c
	source/arch_def.h
	source/bgmusic.c
	source/bgmusic.h
	source/bspfile.h
	source/cdaudio.h
	source/cfgfile.c
	source/cfgfile.h
	source/chase.c
	source/cl_demo.c
	source/cl_input.c
	source/cl_main.c
	source/cl_parse.c
	source/cl_tent.c
	source/client.h
	source/cmd.c
	source/cmd.h
	source/common.c
	source/common.h
	source/console.c
	source/console.h
	source/crc.c
	source/crc.h
	source/cvar.c
	source/cvar.h
	source/draw.h
	source/filenames.h
	source/gl_draw.c
	source/gl_fog.c
	source/gl_mesh.c
	source/gl_model.c
	source/gl_model.h
	source/gl_refrag.c
	source/gl_rlight.c
	source/gl_rmain.c
	source/gl_rmisc.c
	source/gl_screen.c
	source/gl_sky.c
	source/gl_texmgr.c
	source/gl_texmgr.h
	source/gl_warp.c
	source/gl_warp_sin.h
	source/glquake.h
	source/host.c
	source/host_cmd.c
	source/image.c
	source/image.h
	source/input.h
	source/keys.c
	source/keys.h
	source/lib/lodepng.h
	source/lib/stb_image_write.h
	source/mathlib.c
	source/mathlib.h
	source/menu.c
	source/menu.h
	source/modelgen.h
	source/net.h
	source/net_defs.h
	source/net_dgrm.c
	source/net_dgrm.h
	source/net_loop.c
	source/net_loop.h
	source/net_main.c
	source/net_sys.h
	source/platform.h
	source/pr_cmds.c
	source/pr_defs.h
	source/pr_edict.c
	source/pr_edict.h
	source/pr_exec.c
	source/pr_global.h
	source/pr_load.c
	source/pr_ops.h
	source/pr_string.c
	source/progs.h
	source/protocol.h
	source/q_ctype.h
	source/q_defs.h
	source/q_sound.h
	source/q_stdinc.h
	source/r_alias.c
	source/r_brush.c
	source/r_part.c
	source/r_sprite.c
	source/r_world.c
	source/render.h
	source/sbar.c
	source/sbar.h
	source/screen.h
	source/server.h
	source/snd_codec.c
	source/snd_codec.h
	source/snd_codeci.h
	source/snd_dma.c
	source/snd_flac.c
	source/snd_mem.c
	source/snd_mix.c
	source/snd_mod.c
	source/snd_opus.c
	source/snd_umx.c
	source/snd_vorbis.c
	source/spritegn.h
	source/strl_fn.c
	source/sv_main.c
	source/sv_move.c
	source/sv_phys.c
	source/sv_user.c
	source/sys.h
	source/vid.h
	source/view.c
	source/view.h
	source/wad.c
	source/wad.h
	source/world.c
	source/world.h
	source/zone.c
	source/zone.h)

set(srcs_linux
	source/linux/pl_linux.c
	source/linux/qs_bmp.h)

set(srcs_osx
	source/osx/pl_osx.c)

set(srcs_unix
	source/unix/net_bsd.c
	source/unix/net_udp.c
	source/unix/net_udp.h
	source/unix/sys_sdl_unix.c)

set(srcs_windows
	source/windows/net_win.c
	source/windows/net_wins.c
	source/windows/net_wins.h
	source/windows/net_wipx.c
	source/windows/net_wipx.h
	source/windows/pl_win.c
	source/windows/spingle.rc
	source/windows/sys_sdl_win.c
	source/windows/wsaerror.h)

set(srcs_sdl
	source/sdl/cd_sdl.c
	source/sdl/endian_sdl.h
	source/sdl/gl_vidsdl.c
	source/sdl/in_sdl.c
	source/sdl/main_sdl.c
	source/sdl/snd_sdl.c)

set(libs
	m
	OpenGL::GL
	${SDL2_LIBRARIES})

set(defs "")

list(APPEND srcs ${srcs_sdl})

if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
	set(USE_WINSOCK_2 TRUE CACHE BOOL "Use WinSock2 for networking")
	list(APPEND srcs ${srcs_windows})
	list(APPEND libs winmm)
	if(USE_WINSOCK_2)
		list(APPEND libs ws2_32)
		list(APPEND defs _USE_WINSOCK2)
	else()
		list(APPEND libs wsock32)
	endif()
elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux")
	list(APPEND srcs ${srcs_unix} ${srcs_linux})
elseif(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
	list(APPEND srcs ${srcs_unix} ${srcs_osx})
else()
	message(FATAL_ERROR "platform not supported")
endif()

if(HAVE_COMPUTED_GOTO)
	list(APPEND defs HAVE_COMPUTED_GOTO=1)
endif()

macro(agw_checked_library define library)
	if(${library}_FOUND)
		list(APPEND defs ${define}=1)
		list(APPEND libs PkgConfig::${library})
	endif()
endmacro()

agw_checked_library(USE_CODEC_FLAC   FLAC)
agw_checked_library(USE_CODEC_VORBIS Vorbis)
agw_checked_library(USE_CODEC_OPUS   Opus)
agw_checked_library(USE_CODEC_MOD    MikMod)

add_executable(quake WIN32 ${srcs})
target_compile_options(quake PUBLIC
	$<$<C_COMPILER_ID:AppleClang,Clang,GNU>:
		-Wall -Wextra -Werror -Wno-missing-field-initializers>
	# why are these even warnings?
	$<$<C_COMPILER_ID:GNU>: -Wno-array-bounds -Wno-stringop-truncation>
	$<$<C_COMPILER_ID:MSVC>: /W4>)
target_include_directories(quake SYSTEM PUBLIC ${SDL2_INCLUDE_DIRS})
target_include_directories(quake PUBLIC source)
target_compile_definitions(quake PUBLIC ${defs})
target_link_libraries(quake ${libs})