SHELL=/bin/bash

# configurable options

ifndef ($(SOURCES_DIR))
	SOURCES_DIR := ./src
endif

ifndef ($(TESTS_DIR))
	TESTS_DIR := ./tests
endif

ifndef ($(BUILD_DIR))
	BUILD_DIR := ./build
endif

CC := gcc
CXX := g++


# dependencies

PACKAGE_NAMES := fuse3 sqlite3

ifeq ($(TEST), 1)
	#	PACKAGE_NAMES += check # TODO: use check?
endif


# set up cflags and libs

CFLAGS := -D_FILE_OFFSET_BITS=64
LDFLAGS :=

CFLAGS += $(shell pkg-config --cflags $(PACKAGE_NAMES))
LDFLAGS += $(shell pkg-config --libs $(PACKAGE_NAMES))

ifeq ($(DEBUG),1)
	CFLAGS += -O0 -pedantic -g -Wall -Wextra -Wcast-align \
						-Wcast-qual -Wdisabled-optimization -Wformat=2 \
						-Winit-self -Wlogical-op -Wmissing-declarations \
						-Wmissing-include-dirs -Wredundant-decls -Wshadow \
						-Wsign-conversion -Wstrict-overflow=5 \
						-Wswitch-default -Wundef -Wno-unused
	LDFLAGS += 
else
	CFLAGS += -O3
	LDFLAGS +=
endif


# set up targets 

TARGETS := $(BUILD_DIR)/icfs

ifeq ($(TEST), 1)
	TARGETS += icfs_test
endif

ifneq ($(DIALOGUE), 0)
	TARGETS += $(BUILD_DIR)/icfs_dialogue
endif

# build!

default: $(TARGETS)

.PHONY: clean icfs_test clean-icfs clean-icfs_dialogue

$(BUILD_DIR)/icfs_dialogue:
	make -C $(SOURCES_DIR)/gui TEST=$(TEST) DEBUG=$(shell realpath $(DEBUG)) SOURCES_DIR=$(shell realpath $(SOURCES_DIR)/gui) BUILD_DIR=$(shell realpath $(BUILD_DIR)) TESTS_DIR=$(shell realpath $(TESTS_DIR))

$(BUILD_DIR)/icfs: $(BUILD_DIR)/main.o $(BUILD_DIR)/fuse_operations.o $(BUILD_DIR)/sourcefs.o $(BUILD_DIR)/ui-socket.o $(BUILD_DIR)/temp_permissions_table.o $(BUILD_DIR)/perm_permissions_table.o
	$(CC) $(CFLAGS) $^ $(LDFLAGS) -o $(BUILD_DIR)/icfs

icfs_test: $(BUILD_DIR)/icfs
	cd ./test && ./test.bash

$(BUILD_DIR)/test_access_control.o: $(TESTS_DIR)/test_access_control.c
	$(CC) $(CFLAGS) -c $< $(LDFLAGS) -o $@

$(BUILD_DIR)/main.o: $(SOURCES_DIR)/main.c
	$(CC) $(CFLAGS) -c $< $(LDFLAGS) -o $(BUILD_DIR)/main.o

$(BUILD_DIR)/fuse_operations.o: $(SOURCES_DIR)/fuse_operations.c $(SOURCES_DIR)/fuse_operations.h
	$(CC) $(CFLAGS) -c $< $(LDFLAGS) -o $@

$(BUILD_DIR)/sourcefs.o: $(SOURCES_DIR)/sourcefs.c $(SOURCES_DIR)/sourcefs.h $(SOURCES_DIR)/real_filename.h
	$(CC) $(CFLAGS) -c $< $(LDFLAGS) -o $@

$(BUILD_DIR)/ui-socket.o: $(SOURCES_DIR)/ui-socket.c $(SOURCES_DIR)/ui-socket.h
	$(CC) $(CFLAGS) -c $< $(LDFLAGS) -o $@

$(BUILD_DIR)/temp_permissions_table.o: $(SOURCES_DIR)/temp_permissions_table.c $(SOURCES_DIR)/temp_permissions_table.h
	$(CC) $(CFLAGS) -c $< $(LDFLAGS) -o $@

$(BUILD_DIR)/perm_permissions_table.o: $(SOURCES_DIR)/perm_permissions_table.c $(SOURCES_DIR)/perm_permissions_table.h
	$(CC) $(CFLAGS) -c $< $(LDFLAGS) -o $@

CLEAN_TARGETS=clean-icfs

ifneq ($(DIALOGUE), 0)
	CLEAN_TARGETS += clean-icfs_dialogue
endif

clean: $(CLEAN_TARGETS)

clean-icfs:
	rm $(BUILD_DIR)/*.o $(BUILD_DIR)/icfs

clean-icfs_dialogue:
		make -C $(SOURCES_DIR)/gui clean SOURCES_DIR=$(shell realpath $(SOURCES_DIR)/gui) BUILD_DIR=$(shell realpath $(BUILD_DIR)) TESTS_DIR=$(shell realpath $(TESTS_DIR))