CXX = g++
CXXFLAGS = -std=c++20 -O3 -Wall -Wextra -Wpedantic
LDFLAGS = -lsfml-graphics -lsfml-window -lsfml-system

NAME = osu++

INCLUDE = include
CXXFLAGS += -I$(INCLUDE)

SRC = src
BIN = target
PREPROCESSED = preprocessed

_PROG = HitObjectDrawable.cpp main.cpp osuparser.cpp TextureManager.cpp
PROG = $(addprefix $(SRC)/, $(_PROG))

OBJ = $(_PROG:.cpp=.o)

.PHONY: all clean

all: dirs $(NAME)

dirs:
	mkdir -p $(BIN)
	mkdir -p $(PREPROCESSED)

$(NAME): $(OBJ)
	$(CXX) $(addprefix $(BIN)/, $^) $(LDFLAGS) -o $(BIN)/$@

%.o: $(SRC)/%.cpp
	$(CXX) -c $< $(CXXFLAGS) -o $(BIN)/$@

clean:
	rm -rf $(addprefix $(BIN)/, $(OBJ))
	rm -rf $(BIN)/$(NAME)
	rm -rf $(BIN)
	rm -rf $(PREPROCESSED)

_PP_HXX = osuparser.hpp config.hpp
_PP_CXX = osuparser.cpp
_PP = $(_PP_HXX) $(_PP_CXX)
PP = $(addprefix $(PREPROCESSED)/, $(_PP))

# the awks below will remove all includes, pragmas and blank lines from the top of the file
# until they hit something else
#
# that something else could be an awk marker comment which saves part of the includes
# from being eaten by awk - ones useful when debugging the output of these godforsaken macros
#
# doing that makes clang-format considerably faster (c++ std moment)
# but also removes my own headers which makes some of the macros not evaluate
#
# that issue is fixed by adding a comment that'll stop the awk before my macros
# and after all the others
pp: dirs $(PP)

$(PREPROCESSED)/%.hpp: $(INCLUDE)/%.hpp
	$(eval TMP := $(shell mktemp).hpp)
	awk '/^#include/ || /^#pragma/ || /^[[:space:]]*$$/ {if(!f)next} // {f=1;print}' $< > $(TMP)
	$(CXX) $(CXXFLAGS) -E $(TMP) > $@
	clang-format -i $@
	rm -rf $(TMP)

$(PREPROCESSED)/%.cpp: $(SRC)/%.cpp
	$(eval TMP := $(shell mktemp).cpp)
	awk '/^#include/ || /^#pragma/ || /^[[:space:]]*$$/ {if(!f)next} // {f=1;print}' $< > $(TMP)
	$(CXX) $(CXXFLAGS) -E $(TMP) > $@
	clang-format -i $@
	rm -rf $(TMP)