PROJECT_NAME = tiny-kyoukai
BUILD_DIR = build
SOURCE_DIR = src
HEADER_DIR = $(SOURCE_DIR)/includes

#------------------------------------------------------------------------------
#									SETUP
#------------------------------------------------------------------------------

CC = gcc
CFLAGS = -std=c11 -g
LDFLAGS = -g
LIBS = x11 gtk4 gtk4-x11
STATIC_LIBS = 
INCLUDES = -I$(HEADER_DIR)
ifdef LIBS
LDLIBS = $(shell pkg-config --libs $(LIBS))
INCLUDES += $(shell pkg-config --cflags $(LIBS))
endif
ifdef STATIC_LIBS
LDLIBS += -Wl,-Bstatic $(shell pkg-config --libs $(STATIC_LIBS)) -Wl,-Bdynamic
INCLUDES += $(shell pkg-config --cflags $(STATIC_LIBS))
endif

SRC = $(shell find $(SOURCE_DIR)/ -type f -name '*.c') main.c
NOM = $(basename $(notdir $(SRC)))
OBJ = $(addprefix $(BUILD_DIR)/,$(addsuffix .o, $(NOM)))
DEP = $(addprefix $(BUILD_DIR)/,$(addsuffix .d, $(NOM)))

# Variables for GResources (GTK)
RES_DIR = ressources
RES_PREFIX = kyou

RCC = glib-compile-resources
RCC_OPTS = --c-name $(RES_PREFIX)

RES_SRC = $(shell find $(RES_DIR)/ -type f -name '*.gresource.xml')
RES_NOM = $(basename $(notdir $(RES_SRC)))
RES = $(addprefix $(SOURCE_DIR)/,$(addsuffix .c, $(RES_NOM)))
RES_INC = $(addprefix $(HEADER_DIR)/,$(addsuffix .h, $(RES_NOM)))
RES_OBJ = $(addprefix $(BUILD_DIR)/,$(addsuffix .o, $(RES_NOM)))
RES_DEP = $(addprefix $(BUILD_DIR)/,$(addsuffix .dep, $(RES_NOM)))

# Add GResources objects to general prerequisites
OBJ := $(RES_OBJ) $(OBJ)
DEP += $(addprefix $(BUILD_DIR)/,$(addsuffix .d, $(RES_NOM)))

# Note: '.d' and '.dep' are different, as CC -MMD would overwrite the resource
#		dependencies generated by glib-compile-resources, and '.d' concerns the
# 		'.o' objects made from '.gresource.c', not deps for the latter.


#------------------------------------------------------------------------------
#								MAIN BUILD RULES
#------------------------------------------------------------------------------

# Main rule 
all: init build  

# General build
build: $(PROJECT_NAME)

# Build all the .o files in src dir
$(BUILD_DIR)/%.o: $(SOURCE_DIR)/%.c Makefile
	$(CC) $(CFLAGS) -MMD -MP -c $< $(INCLUDES) -o $(BUILD_DIR)/$(notdir $@)

# Build all the .o files in base dir
$(BUILD_DIR)/%.o: %.c Makefile
	$(CC) $(CFLAGS) -MMD -MP -c $< $(INCLUDES) -o $(BUILD_DIR)/$(notdir $@)

# Main program
$(PROJECT_NAME): $(OBJ)
	$(CC) $(LDFLAGS) $^ $(LDLIBS) -o $@

# Helloworld
kyoutest: 	$(BUILD_DIR)/helloworld.o
	$(CC) $(LDFLAGS) $^ $(LDLIBS) -o $@

# Dependancies generated by GCC (for headers)
-include $(DEP)


#------------------------------------------------------------------------------
#								 GRESOURCES
#------------------------------------------------------------------------------

# Build all GResources from .gresource.xml files in res dir
$(SOURCE_DIR)/%.gresource.c: $(RES_DIR)/%.gresource.xml $(HEADER_DIR)/%.gresource.h Makefile
	$(eval DEPFILE = $(BUILD_DIR)/$(subst xml,dep,$(notdir $<)))
	printf "$(SOURCE_DIR)/$$(basename $<): " | sed 's/xml/c/g' > $(DEPFILE)
	$(RCC) --generate-dependencies $< --sourcedir=$(RES_DIR) | tr "\n" " " >> $(DEPFILE)
	$(RCC) $< --generate-source $(RCC_OPTS) --target=$@ --sourcedir=$(RES_DIR)

# Generate header files from .gresource.xml files in res dir
$(HEADER_DIR)/%.gresource.h: $(RES_DIR)/%.gresource.xml Makefile
	$(RCC) $< --generate-header $(RCC_OPTS) --target=$@ --sourcedir=$(RES_DIR)

# Dependencies generated above
-include $(RES_DEP)

# Utility to pre-generate resource headers
pregen-res: $(RES_INC)

test-res:
	@echo RCC: $(RCC)
	@echo RCC_OPTS: $(RCC_OPTS)
	@echo RES_DIR: $(RES_DIR)
	@echo RES_SRC: $(RES_SRC)
	@echo RES: $(RES)
	@echo RES_OBJ: $(RES_OBJ)
	@echo RES_DEP: $(RES_DEP)
	@echo RES_INC: $(RES_INC)

# Keep intermediate C files ! (remove with 'clear')
.PRECIOUS: $(RES_INC) $(RES)


#------------------------------------------------------------------------------
#								SILLY RULES
#------------------------------------------------------------------------------

always: SUSSYBAKA
	@echo "Aloha :3"

SUSSYBAKA:


#------------------------------------------------------------------------------
#								UTILITIES
#------------------------------------------------------------------------------

rebuild: clean build

init: clear
	mkdir -p $(BUILD_DIR)

test:
	@echo CC: $(CC)
	@echo CFLAGS: $(CFLAGS)
	@echo LDFLAGS: $(LDFLAGS)
	@echo LIBS: $(LIBS)
	@echo LDLIBS: $(LDLIBS)
	@echo SOURCE_DIR: $(SOURCE_DIR)
	@echo HEADER_DIR: $(HEADER_DIR)
	@echo OBJ: $(OBJ)
	@echo SRC: $(SRC)
	@echo DEP: $(DEP)
	@echo INCLUDES: $(INCLUDES)

run: $(PROJECT_NAME)
	./$(PROJECT_NAME)

clean:
	@rm -if $(OBJ) $(DEP) $(RES) $(RES_DEP)
#	@rm -rif *.o *.gch
#	@rm -rif $(BUILD_DIR)/*.o $(BUILD_DIR)/*.gch

clear: clean
	@rm -if $(PROJECT_NAME) $(RES_INC)


.PHONY: always init SUSSYBAKA test test-res clear clean run pregen-res