#!/usr/bin/make -f
FLAGS  = -std=c23
FLAGS += -O3
FLAGS += -march=native
FLAGS += -pedantic
FLAGS += -Wall
FLAGS += -Wextra
FLAGS += -Werror
FLAGS += -Wformat-truncation=0

GITFLAG = -D'GITHASH=$(shell git rev-parse --short=1 HEAD)'

OBJDIR = obj
OUTDIR = out

#UI_TARGET = vt100
UI_TARGET = ncurses

LICENSEURL = https://www.gnu.org/licenses/old-licenses/gpl-2.0.txt

CC = cc

.NOTINTERMEDIATE:

MSG_FETCHING = FETCHING:
MSG_LINKING = Linking:
MSG_COMPILING = Compiling C:
MSG_CLEANING = Cleaning:
MSG_CLEANING_OBJ = Cleaning $(OBJDIR):
MSG_CLEANING_OUT = Cleaning $(OUTDIR):

all: $(addprefix $(OUTDIR)/connect4_,ncurses.elf vt100.elf)

run: $(OUTDIR)/connect4_$(UI_TARGET).elf
	./$<

run_%: $(OUTDIR)/connect4_%.elf
	./$<

$(OUTDIR)/connect4_ncurses.elf: $(addprefix $(OBJDIR)/,ui_ncurses.o logic.o connect4.o LICENSE.o)
	@echo $(MSG_LINKING) $@
	@mkdir -p $(@D)
	$(CC) $(FLAGS) -lncursesw -o $@ $^

$(OUTDIR)/connect4_%.elf: $(addprefix $(OBJDIR)/,ui_%.o logic.o connect4.o LICENSE.o)
	@echo $(MSG_LINKING) $@
	@mkdir -p $(@D)
	$(CC) $(FLAGS) -o $@ $^

$(OBJDIR)/LICENSE.o: $(OBJDIR)/LICENSE
	@echo $(MSG_LINKING) $@
	@mkdir -p $(@D)
	cd $(@D); ld -r -b binary -o $(@F) $(^F)

$(OBJDIR)/connect4.o: connect4.c
	@echo $(MSG_COMPILING) $^
	@mkdir -p $(@D)
	$(CC) -c $(FLAGS) $(GITFLAG) -o $@ $^

$(OBJDIR)/%.o: %.c
	@echo $(MSG_COMPILING) $^
	@mkdir -p $(@D)
	$(CC) -c $(FLAGS) -o $@ $^

$(OBJDIR)/LICENSE:
	@echo $(MSG_FETCHING) $@
	curl $(LICENSEURL) \
		| sed -n '/END OF TERMS AND CONDITIONS/q;p' > $(OBJDIR)/LICENSE

clean:
	@echo $(MSG_CLEANING)
	@echo $(MSG_CLEANING_OBJ)
	rm -f $(OBJDIR)/*.o
	@echo $(MSG_CLEANING_OUT)
	rm -f $(OUTDIR)/*.elf