PROGRAM=confec
PROGRAM_DRMFREE=cave-confec
INCLUDES=include/fworld.h include/civilian.h
# Change the value of CXXSTD depending on what is supported by your compiler. Older compilers may require c++1z
CXXSTD=c++17

# SDL2
SDL2_VER=2.0.16
SDL2_DIR=SDL2-$(SDL2_VER)
SDL2_TAR=$(SDL2_DIR).tar.gz
SDL2_WIN_TAR=SDL2-devel-$(SDL2_VER)-mingw.tar.gz

# Boost
BOOST_VER_MAJOR=1
BOOST_VER_MINOR=76
BOOST_VER_PATCH=0
BOOST_VER_DOTTED=$(BOOST_VER_MAJOR).$(BOOST_VER_MINOR).$(BOOST_VER_PATCH)
BOOST_DIR=boost_$(BOOST_VER_MAJOR)_$(BOOST_VER_MINOR)_$(BOOST_VER_PATCH)
BOOST_TAR=$(BOOST_DIR).tar.bz2

# OpenSSL
OPENSSL_VER_MAJOR=1
OPENSSL_VER_MINOR=1
OPENSSL_VER_PATCH=1g
OPENSSL_VER_DOTTED=$(OPENSSL_VER_MAJOR).$(OPENSSL_VER_MINOR).$(OPENSSL_VER_PATCH)
OPENSSL_DIR=openssl-$(OPENSSL_VER_DOTTED)
OPENSSL_TAR=$(OPENSSL_DIR).tar.gz

LINCC := gcc -march=x86-64 -include $(shell readlink -f include/force_link_glibc_2.25.h)
LINCXX := $(CXX) -march=x86-64 -include $(shell readlink -f include/force_link_glibc_2.25.h)
#CXXDYNAMIC=$(LINCXX) $(CXXFLAGS) -O3 -D__LIGHT__ -D__BEAST__ -o $(PROGRAM)-dynamic $(PROGRAM).cpp libs.o libboost_system.a -Wl,-rpath,. -L. -l:libSDL2.so -lssl -lcrypto -pthread
CXXDYNAMIC=$(LINCXX) $(CXXFLAGS) -O3 -D__LIGHT__ -o $(PROGRAM)-dynamic $(PROGRAM).cpp libs.o -Wl,-rpath,. -L. -l:libSDL2.so -pthread
MACCXX=clang++ -march=x86-64
WINCXX=i686-w64-mingw32-g++-posix -march=pentium4 -static-libgcc -static-libstdc++
#CXXFLAGS=-Iinclude -I$(OPENSSL_DIR)/include -I$(BOOST_DIR) -std=$(CXXSTD) -Wall -Wextra -Wfatal-errors
CXXFLAGS=-Iinclude -I$(BOOST_DIR) -std=$(CXXSTD) -Wall -Wextra -Wfatal-errors
WIN_CMAKE_FLAGS=-DCMAKE_C_COMPILER=i686-w64-mingw32-gcc-win32 -DCMAKE_CXX_COMPILER=i686-w64-mingw32-g++-win32 -DCMAKE_C_COMPILER_WORKS=1 -DCMAKE_CXX_COMPILER_WORKS=1
MAC_OPENSSL_SSL=libssl-mac.a
MAC_OPENSSL_CRYPTO=libcrypto-mac.a
WIN_OPENSSL_SSL=libssl-$(OPENSSL_VER_MAJOR)_$(OPENSSL_VER_MINOR).dll
WIN_OPENSSL_CRYPTO=libcrypto-$(OPENSSL_VER_MAJOR)_$(OPENSSL_VER_MINOR).dll
WEB_PREFIX=sudo docker run --rm -v $(shell pwd):/src -u emscripten trzeci/emscripten
WEB_FLAGS_LEGACY=-s TOTAL_MEMORY=134217728
WEB_FLAGS_NEW=-s INITIAL_MEMORY=134217728
WEB_FLAGS=$(WEB_FLAGS_LEGACY) -fno-rtti -fno-exceptions --llvm-lto 1 -s ELIMINATE_DUPLICATE_FUNCTIONS=1 -s "ENVIRONMENT='web'" -s USE_SDL=0 -s SIMD=0 -s WASM=0 -s "EXTRA_EXPORTED_RUNTIME_METHODS=['Pointer_stringify']" --preload-file data
WEB_SDL_OPT=--disable-render --disable-render-d3d --disable-directx --disable-video-vulkan --disable-filesystem --disable-diskaudio --disable-dummyaudio --disable-libudev --disable-haptic
WEB_SDL_CONFIGURE=emconfigure ../configure --host=asmjs-unknown-emscripten --disable-assembly --disable-threads --disable-cpuinfo $(WEB_SDL_OPT)

# Uncomment the line below to default to the DRM-free version.
drmfree-gnu: $(PROGRAM_DRMFREE)

steam-gnu: $(PROGRAM)-static

$(PROGRAM)-static: libs.o libboost_system.a libSDL2.a $(PROGRAM).cpp $(INCLUDES)
	# Building Steam version with Boost::Beast for GNU/Linux.
	$(LINCXX) $(CXXFLAGS) -static-libgcc -static-libstdc++ -O3 -D__LIGHT__ -D__BEAST__ -D__STEAM__ -o $@ $(PROGRAM).cpp libs.o libboost_system.a libSDL2.a \
	-Wl,-rpath,. -L. -ldl -lssl -lcrypto -pthread -lsteam_api

#$(PROGRAM_DRMFREE): libs.o libboost_system.a libSDL2.a $(PROGRAM).cpp $(INCLUDES)
	# Building DRM-free version with Boost::Beast for GNU/Linux.
	#$(LINCXX) $(CXXFLAGS) -static-libgcc -static-libstdc++ -O3 -D__LIGHT__ -D__BEAST__ -o $@ $(PROGRAM).cpp libs.o libboost_system.a libSDL2.a \
	#-Wl,-rpath,. -L. -ldl -lssl -lcrypto -pthread

$(PROGRAM_DRMFREE): libs.o libSDL2.a $(PROGRAM).cpp $(INCLUDES)
	# Building DRM-free version for GNU/Linux.
	$(LINCXX) $(CXXFLAGS) -static-libgcc -static-libstdc++ -O3 -D__LIGHT__ -o $@ $(PROGRAM).cpp libs.o libSDL2.a -Wl,-rpath,. -L. -ldl -pthread

#$(PROGRAM)-dynamic: libs.o libboost_system.a $(PROGRAM).cpp $(INCLUDES)
$(PROGRAM)-dynamic: libs.o $(PROGRAM).cpp $(INCLUDES)
	$(CXXDYNAMIC)

# VR support, lol. Not currently implemented.
ccvr: libs.o libboost_system.a libSDL2.a $(PROGRAM).cpp $(INCLUDES)
	$(LINCXX) $(CXXFLAGS) -static-libgcc -static-libstdc++ -O3 -D__LIGHT__ -D__BEAST__ -D__STEAM__ -o $@ $(PROGRAM).cpp libs.o libboost_system.a libSDL2.a \
	-Wl,-rpath,. -L. -ldl -lssl -lcrypto -pthread -lopenxr_loader -lsteam_api

# debug build settings may be outdated and broken
debug: clean libs.o libboost_system.a libSDL2.a $(PROGRAM).cpp
	$(LINCXX) -Iinclude -I$(BOOST_DIR) -std=$(CXXSTD) -Wall -Wextra -Wfatal-errors -g -D__STEAM__ -o $@ $(PROGRAM).cpp libs.o libboost_system.a libSDL2.a -Wl,-rpath,. -L. -ldl -lssl -lcrypto -pthread -lsteam_api

lint:
	clang-tidy $(PROGRAM).cpp -checks=cert-*-cpp -header-filter=fdungeon.h -- $(CXXDYNAMIC)

drmfree: $(PROGRAM_DRMFREE) $(PROGRAM_DRMFREE).exe

demo: $(PROGRAM)-demo-static $(PROGRAM)-demo.exe

# demo build settings may be outdated and broken
$(PROGRAM)-demo-static: libs.o libboost_system.a libSDL2.a $(PROGRAM).cpp $(INCLUDES)
	$(LINCXX) $(CXXFLAGS) -static-libgcc -static-libstdc++ -O3 -D__LIGHT__ -D__STEAM__ -D__DEMO__ -o $@ $(PROGRAM).cpp libs.o libboost_system.a libSDL2.a \
	-Wl,-rpath,. -L. -ldl -lssl -lcrypto -pthread -lsteam_api

$(PROGRAM)-demo.exe: libs-win.o libboost_system-win.a $(WIN_OPENSSL_SSL) $(WIN_OPENSSL_CRYPTO) $(PROGRAM).cpp $(INCLUDES)
	$(WINCXX) $(CXXFLAGS) -I$(OPENSSL_DIR)/include -O3 -D__LIGHT__ -D__STEAM__ -D__DEMO__ -o $@ $(PROGRAM).cpp libs-win.o libboost_system-win.a \
	-L. -l:$(WIN_OPENSSL_SSL) -l:$(WIN_OPENSSL_CRYPTO) -lwsock32 -lws2_32 -lmingw32 -l:SDL2.dll -l:libSDL2main.a -l:steam_api.dll \
	-static -lpthread

# TODO: Rewrite server.
ccserver: ccserver.cpp $(INCLUDES)
	$(LINCXX) $(CXXFLAGS) -O3 -o $@ ccserver.cpp -Wl,-rpath,. -L. -pthread

# Uncomment the line with the $(BOOST_DIR) dependency when building with Boost::Beast.
#libs.o: libs.cpp micropather.cpp include/tm_json.h $(BOOST_DIR)
libs.o: libs.cpp micropather.cpp include/tm_json.h
	$(LINCXX) $(CXXFLAGS) -O3 -o $@ libs.cpp -c

# Build SDL2 for Linux as compatibly as possible.
libSDL2.a: $(SDL2_DIR)
	rm -r -f $(SDL2_DIR)/build
	mkdir -p $(SDL2_DIR)/build
	export CC="$(LINCC)" ;\
	cd $(SDL2_DIR)/build; ../configure --disable-sndio --disable-esd \
	--disable-arts --disable-video-directfb --disable-rpath \
	--enable-alsa --enable-alsa-shared --enable-pulseaudio \
	--enable-pulseaudio-shared --enable-x11-shared --enable-sdl-dlopen \
	--disable-input-tslib CFLAGS="-O3" && make
	cp $(SDL2_DIR)/build/build/.libs/libSDL2.a $@
	touch $@

# Mac builds currently link boost::filesystem regardless of C++ standard version. The assumption on Mac is c++1z
$(PROGRAM)-mac: libs-mac.o SDL2.framework libboost_filesystem.a $(MAC_OPENSSL_SSL) $(MAC_OPENSSL_CRYPTO) $(PROGRAM).cpp $(INCLUDES)
	# Building Steam version with Boost::Beast for Mac.
	$(MACCXX) $(CXXFLAGS) -O3 -D__LIGHT__ -D__BEAST__ -D__STEAM__ -o $@ $(PROGRAM).cpp libs-mac.o $(MAC_OPENSSL_SSL) $(MAC_OPENSSL_CRYPTO) \
	-F. -L. -Wl,-rpath,"." -framework SDL2 -ldl -pthread -lboost_filesystem -lsteam_api

#$(PROGRAM_DRMFREE)-mac: libs-mac.o SDL2.framework libboost_filesystem.a $(MAC_OPENSSL_SSL) $(MAC_OPENSSL_CRYPTO) $(PROGRAM).cpp $(INCLUDES)
	# Building DRM-free version with Boost::Beast for Mac.
	#$(MACCXX) $(CXXFLAGS) -O3 -D__LIGHT__ -D__BEAST__ -o $@ $(PROGRAM).cpp libs-mac.o $(MAC_OPENSSL_SSL) $(MAC_OPENSSL_CRYPTO) \
	#-F. -L. -Wl,-rpath,"." -framework SDL2 -ldl -pthread -lboost_filesystem

$(PROGRAM_DRMFREE)-mac: libs-mac.o SDL2.framework libboost_filesystem.a $(PROGRAM).cpp $(INCLUDES)
	# Building DRM-free version for Mac.
	$(MACCXX) $(CXXFLAGS) -O3 -D__LIGHT__ -o $@ $(PROGRAM).cpp libs-mac.o -F. -L. -Wl,-rpath,"." -framework SDL2 -ldl -pthread -lboost_filesystem

libs-mac.o: libs.cpp micropather.cpp include/tm_json.h $(BOOST_DIR)
	$(MACCXX) $(CXXFLAGS) -O3 -o $@ libs.cpp -c

$(PROGRAM).exe: libs-win.o libboost_system-win.a $(WIN_OPENSSL_SSL) $(WIN_OPENSSL_CRYPTO) $(PROGRAM).cpp $(INCLUDES)
	# Building Steam version with Boost::Beast for Windows.
	$(WINCXX) $(CXXFLAGS) -I$(OPENSSL_DIR)/include -O3 -D__LIGHT__ -D__BEAST__ -D__STEAM__ -o $@ $(PROGRAM).cpp libs-win.o libboost_system-win.a \
	-L. -l:$(WIN_OPENSSL_SSL) -l:$(WIN_OPENSSL_CRYPTO) -lwsock32 -lws2_32 -lmingw32 -l:SDL2.dll -l:libSDL2main.a -l:steam_api.dll \
	-static -lpthread

#$(PROGRAM_DRMFREE).exe: libs-win.o libboost_system-win.a $(WIN_OPENSSL_SSL) $(WIN_OPENSSL_CRYPTO) $(PROGRAM).cpp $(INCLUDES)
	# Building DRM-free version with Boost::Beast for Windows.
	#$(WINCXX) $(CXXFLAGS) -I$(OPENSSL_DIR)/include -O3 -D__LIGHT__ -D__BEAST__ -o $@ $(PROGRAM).cpp libs-win.o libboost_system-win.a \
	#-L. -l:$(WIN_OPENSSL_SSL) -l:$(WIN_OPENSSL_CRYPTO) -lwsock32 -lws2_32 -lmingw32 -l:SDL2.dll -l:libSDL2main.a \
	#-static -lpthread

$(PROGRAM_DRMFREE).exe: libs-win.o $(PROGRAM).cpp $(INCLUDES)
	# Building DRM-free version for Windows.
	$(WINCXX) $(CXXFLAGS) -O3 -D__LIGHT__ -o $@ $(PROGRAM).cpp libs-win.o -L. -lmingw32 -l:SDL2.dll -l:libSDL2main.a -static -lpthread

# You get the picture.
#libs-win.o: include/SDL2 libSDL2main.a SDL2.dll libs.cpp micropather.cpp include/tm_json.h $(BOOST_DIR) $(OPENSSL_DIR)
	#$(WINCXX) $(CXXFLAGS) -I$(OPENSSL_DIR)/include -O3 -o $@ libs.cpp -c

libs-win.o: include/SDL2 libSDL2main.a SDL2.dll libs.cpp micropather.cpp include/tm_json.h
	$(WINCXX) $(CXXFLAGS) -O3 -o $@ libs.cpp -c

include/SDL2: $(SDL2_WIN_TAR)
	$(RM) -r $@
	tar xzvf $(SDL2_WIN_TAR) --strip-components=2 SDL2-$(SDL2_VER)/i686-w64-mingw32/$@
	touch $@

libSDL2main.a: $(SDL2_WIN_TAR)
	tar xzvf $(SDL2_WIN_TAR) --strip-components=3 SDL2-$(SDL2_VER)/i686-w64-mingw32/lib/$@
	touch $@

SDL2.dll: $(SDL2_WIN_TAR)
	tar xzvf $(SDL2_WIN_TAR) --strip-components=3 SDL2-$(SDL2_VER)/i686-w64-mingw32/bin/$@
	touch $@

$(SDL2_WIN_TAR):
	wget https://libsdl.org/release/$(SDL2_WIN_TAR)

html: libs-web.o libSDL2-web.a $(PROGRAM).cpp $(INCLUDES)
	mkdir -p $@
	$(WEB_PREFIX) emcc $(WEB_FLAGS) $(CXXFLAGS) --closure 1 -Oz -D__LIGHT__ -o $@/index.html $(PROGRAM).cpp libs-web.o libSDL2-web.a -lwebsocket.js

web: index-template.html web/index.js
	cp -f index-template.html $@/index.html
	cp -f favicon.ico $@
	touch $@

web/index.js: libs-web.o libSDL2-web.a $(PROGRAM).cpp $(INCLUDES)
	mkdir -p web
	$(WEB_PREFIX) emcc $(WEB_FLAGS) $(CXXFLAGS) --closure 1 -Oz -D__LIGHT__ -o $@ $(PROGRAM).cpp libs-web.o libSDL2-web.a -lwebsocket.js

libs-web.o: libs.cpp micropather.cpp include/tm_json.h
	$(WEB_PREFIX) emcc $(WEB_FLAGS) $(CXXFLAGS) -Oz -o $@ libs.cpp -c

libSDL2-web.a: $(SDL2_DIR)
	rm -r -f $(SDL2_DIR)/build
	mkdir -p $(SDL2_DIR)/build
	$(WEB_PREFIX) /bin/bash -c "cd $(SDL2_DIR)/build; $(WEB_SDL_CONFIGURE) CFLAGS=\"-Oz\" && emmake make"
	cp $(SDL2_DIR)/build/build/.libs/libSDL2.a $@
	touch $@

$(SDL2_DIR): $(SDL2_TAR)
	$(RM) -r $@
	tar xvf $(SDL2_TAR)
	touch $@

$(SDL2_TAR):
	wget https://libsdl.org/release/$(SDL2_TAR)

libboost_system.a: $(BOOST_DIR)
	cp $(BOOST_DIR)/stage/lib/$@ .
	touch $@

libboost_filesystem.a: $(BOOST_DIR)
	# POSIX target
	cd $(BOOST_DIR) && ./b2 --with-filesystem cxxflags="-std=$(CXXSTD)" release
	cp $(BOOST_DIR)/stage/lib/$@ .
	touch $@

libboost_system-win.a: $(BOOST_DIR)
	# Windows target
	# https://stackoverflow.com/questions/5411282#11907834
	# https://stackoverflow.com/questions/27342524#55919915
	cd $(BOOST_DIR) && \
	echo "using gcc : mingw32 : i686-w64-mingw32-g++-posix ;" > win-config.jam && \
	./bootstrap.sh && \
	./b2 --with-system --user-config=win-config.jam toolset=gcc-mingw32 target-os=windows cxxflags="-std=$(CXXSTD)" --layout=tagged architecture=x86 address-model=32 release
	touch $(BOOST_DIR)
	cp $(BOOST_DIR)/stage/lib/libboost_system-mt-x32.a $@
	touch $@

$(BOOST_DIR): $(BOOST_TAR)
	$(RM) -r $@
	tar xvf $(BOOST_TAR)
	# POSIX target
	cd $@ && ./bootstrap.sh && ./b2 --with-system cxxflags="-std=$(CXXSTD)" release
	touch $@

$(BOOST_TAR):
	wget https://boostorg.jfrog.io/artifactory/main/release/$(BOOST_VER_DOTTED)/source/$(BOOST_TAR)

$(MAC_OPENSSL_SSL): $(OPENSSL_DIR)
	# Mac target
	cd $(OPENSSL_DIR) && ./Configure gcc && make
	touch $(OPENSSL_DIR)
	cp $(OPENSSL_DIR)/libssl.a $(MAC_OPENSSL_SSL)
	touch $(MAC_OPENSSL_SSL)
	cp $(OPENSSL_DIR)/libcrypto.a $(MAC_OPENSSL_CRYPTO)
	touch $(MAC_OPENSSL_CRYPTO)

$(WIN_OPENSSL_SSL): $(OPENSSL_DIR)
	# Windows target
	cd $(OPENSSL_DIR) && ./Configure mingw --cross-compile-prefix=i686-w64-mingw32- && make
	touch $(OPENSSL_DIR)
	cp $(OPENSSL_DIR)/$(WIN_OPENSSL_SSL) .
	touch $(WIN_OPENSSL_SSL)
	cp $(OPENSSL_DIR)/$(WIN_OPENSSL_CRYPTO) .
	touch $(WIN_OPENSSL_CRYPTO)

$(OPENSSL_DIR): $(OPENSSL_TAR)
	$(RM) -r $@
	tar xvf $(OPENSSL_TAR)
	touch $@

$(OPENSSL_TAR):
	wget https://www.openssl.org/source/$(OPENSSL_TAR)

clean:
	$(RM) debug $(PROGRAM)-static $(PROGRAM)-dynamic $(PROGRAM_DRMFREE) $(PROGRAM)-demo-static libs.o \
	$(PROGRAM).exe $(PROGRAM_DRMFREE).exe $(PROGRAM)-demo.exe libs-win.o libs-web.o ccserver