CC = clang
CFLAGS = -Wall -Wextra -Werror -O2
LDFLAGS = -flto
SRC_DIR = srcs
OBJ_DIR = obj
BUILD_DIR = build
HDRS_DIR = hdrs
LIBRARY = $(BUILD_DIR)/libft.a

# Source and object files for library
SRCS = $(shell find $(SRC_DIR) -type f -name "*.c")
OBJS = $(patsubst $(SRC_DIR)/%.c,$(OBJ_DIR)/%.o,$(SRCS))

# Test configuration
TESTS_DIR = tests
TESTS_SRCS = $(wildcard $(TESTS_DIR)/*.c)
TESTS_OBJS = $(patsubst $(TESTS_DIR)/%.c,$(OBJ_DIR)/%.test.o,$(TESTS_SRCS))
TESTS_BINS = $(patsubst $(TESTS_DIR)/%.c,$(BUILD_DIR)/%_test,$(TESTS_SRCS))

# Flags for configuration
CONFIG_FLAGS := $(shell grep -E '^[a-zA-Z0-9_]+=' .config | sed 's/\([A-Za-z0-9_]*\)=y/-D\1=1/;s/\([A-Za-z0-9_]*\)=n/-D\1=0/')
CFLAGS += $(CONFIG_FLAGS)


all: $(LIBRARY)

$(OBJ_DIR) $(BUILD_DIR):
	@mkdir -p $@

# Build object files for library
$(OBJ_DIR)/%.o: $(SRC_DIR)/%.c $(HDRS_DIR)/*.h | $(OBJ_DIR)
	@mkdir -p $(dir $@)
	@echo -e "  CC\t$<"
	@$(CC) $(CFLAGS) -I$(HDRS_DIR) -c $< -o $@

$(LIBRARY): $(OBJS) | $(BUILD_DIR)
	@echo -e "  AR\t$@"
	@$(AR) rcs $(LIBRARY) $(OBJS)
# Build object files for tests
$(OBJ_DIR)/%.test.o: $(TESTS_DIR)/%.c $(HDRS_DIR)/*.h | $(OBJ_DIR)
	@mkdir -p $(dir $@)
	@echo -e "  CC\t$<"
	@$(CC) $(CFLAGS) -I$(HDRS_DIR) -I$(SRC_DIR) -c $< -o $@

# Link each test binary
$(BUILD_DIR)/%_test: $(OBJ_DIR)/%.test.o $(LIBRARY) | $(BUILD_DIR)
	@echo -e "  LD\t$@"
	@$(CC) $(CFLAGS) $< -L$(BUILD_DIR) -lft -o $@

tests: $(LIBRARY) $(TESTS_BINS)
	@for testbin in $(TESTS_BINS); do \
		./$$testbin; \
	done

clean:
	@echo "  CLEAN"
	@rm -rf $(OBJ_DIR)

fclean: clean
	@echo "  FCLEAN"
	@rm -rf $(BUILD_DIR)
	@rm -f $(TESTS_BIN)

re: fclean all

.PHONY: all clean fclean re tests

CONFIG_FILE := .config

genconfig:
	@echo -e "  C\t${CONFIG_FILE}"
	@echo "USE_SLIST=y"  >  $(CONFIG_FILE)
	@echo "USE_DLIST=y"  >> $(CONFIG_FILE)
	@echo "USE_STACK=y"  >> $(CONFIG_FILE)