# CFLAGS are compiler flags and LIBFLAGS could be renamed LINKER_FLAGS
OS = $(shell uname)
CC = g++
CFLAGS = -std=c++17 -Wall -pedantic -rdynamic
# -rdynamic is to generate debug info for dynamic symbols on debian-based 
# systems (tested on Linux Mint)
# for OSX, using -g generates a newgame.dSYS directory which has debug symbols.
# However, this has no effect on the stack trace, so there must be a way to specify a *.dSYS directory when running ./newgame
# or to instead put thos symbols directly into the executable, like -rdynamic does for Linux
#-Wextra -fno-inline

ifeq ($(OS),Darwin)
	DEP = -framework Cocoa -framework OpenGL -framework IOKit -framework CoreVideo -lglfw -lglew
endif
ifeq ($(OS),Linux)
	DEP = -lglfw3 -lGLEW -lGL -ldl -lX11 -lXrandr -lXxf86vm -lXinerama -lXcursor -pthread
endif

IMGUI_FILES = IMGUI/imgui_demo.cpp IMGUI/imgui_draw.cpp IMGUI/imgui.cpp

# If I were generating .o files as well, I should use $? instead of $^
# as this well prevent regenerating .o files for unchanged .cpp files

openglref: new-game.cpp logger.cpp utils.cpp crash-logger.cpp imgui_impl_glfw_gl3.cpp $(IMGUI_FILES)
	$(CC) $^ $(DEP) $(CFLAGS) -o $@

openglgame: main-opengl.cpp opengl-game.cpp crash-logger.cpp logger.cpp game-gui-glfw.cpp imgui_impl_glfw_gl3.cpp $(IMGUI_FILES)
	$(CC) $^ $(DEP) $(CFLAGS) -o $@ -DGLEW_STATIC

CXX_FLAGS = -std=c++17 -Wall -pedantic# -O3 -rdynamic

ifeq ($(OS),Darwin)
	VULKAN_SDK_PATH = /Users/dportnoy15/Development/vulkan-sdk-macos-1.1.108.0/macOS
endif
ifeq ($(OS),Linux)
	VULKAN_SDK_PATH = /home/dportnoy/Desktop/VulkanSDK/1.1.106.0/x86_64
endif

LIB_PATHS =  -I$(VULKAN_SDK_PATH)/include
ifeq ($(OS),Darwin)
	LIB_PATHS := -Wl,-rpath,$(VULKAN_SDK_PATH)/lib $(LIB_PATHS)
endif
ifeq ($(OS),Linux)
	LIB_PATHS := -L$(VULKAN_SDK_PATH)/lib $(LIB_PATHS)
endif

LIBS = `pkg-config --static --libs sdl2 sdl2_image sdl2_ttf`
ifeq ($(OS),Darwin)
	LIBS := $(VULKAN_SDK_PATH)/lib/libvulkan.dylib $(LIBS)
endif
ifeq ($(OS),Linux)
	LIBS = `pkg-config --static --libs sdl2`
	LIBS := -lvulkan $(LIBS) -lSDL2_image -lSDL2_ttf # TODO: figure out how to statically link these, ideally using pkg-config
endif

LIB_FLAGS = $(LIB_PATHS) $(LIBS)

vulkanref: vulkan-ref.cpp game-gui-sdl.cpp
	$(CC) $(CXX_FLAGS) -o $@ $^ $(LIB_FLAGS) -DGAMEGUI_INCLUDE_VULKAN

vulkangame: main-vulkan.cpp vulkan-game.cpp crash-logger.cpp logger.cpp vulkan-utils.cpp game-gui-sdl.cpp
	$(CC) $(CXX_FLAGS) -o $@ $^ $(LIB_FLAGS) -DGAMEGUI_INCLUDE_VULKAN

.PHONY: shaders
shaders:
	cd shaders && ../compile.sh && cd ..

clean:
	rm -f openglref
	rm -f vulkanref
	rm -f openglgame
	rm -f vulkangame
	rm -f shaders/*.spv