OBJ_DIR := $(OBJ_DIR)/$(TARGET)-$(PROJECT)

# Include source folder paths to virtual paths
C_SOURCES := $(abspath ${C_SOURCES})
ASM_SOURCES := $(abspath ${ASM_SOURCES})
CPP_SOURCES := $(abspath ${CPP_SOURCES})

# Gather object
OBJECTS = $(addprefix $(OBJ_DIR)/, $(C_SOURCES:.c=.o))
OBJECTS += $(addprefix $(OBJ_DIR)/, $(ASM_SOURCES:.s=.o))
OBJECTS += $(addprefix $(OBJ_DIR)/, $(CPP_SOURCES:.cpp=.o))

OBJECT_DIRS = $(sort $(dir $(OBJECTS)))

# Generate dependencies
DEPS = $(OBJECTS:.o=.d)

ifdef DFU_SERIAL
	DFU_OPTIONS += -S $(DFU_SERIAL)
endif

$(foreach dir, $(OBJECT_DIRS),$(shell mkdir -p $(dir)))

BUILD_FLAGS_SHELL=\
	echo $(OBJ_DIR) ;\
	echo "$(CFLAGS)" > $(OBJ_DIR)/BUILD_FLAGS.tmp; \
	diff -u $(OBJ_DIR)/BUILD_FLAGS $(OBJ_DIR)/BUILD_FLAGS.tmp 2>&1 > /dev/null \
		&& ( echo "CFLAGS ok"; rm $(OBJ_DIR)/BUILD_FLAGS.tmp) \
		|| ( echo "CFLAGS has been changed"; mv $(OBJ_DIR)/BUILD_FLAGS.tmp $(OBJ_DIR)/BUILD_FLAGS )
$(info $(shell $(BUILD_FLAGS_SHELL)))

CHECK_AND_REINIT_SUBMODULES_SHELL=\
	if git submodule status | egrep -q '^[-]|^[+]' ; then \
		echo "INFO: Need to reinitialize git submodules"; \
		git submodule sync; \
		git submodule update --init; \
	fi
$(info $(shell $(CHECK_AND_REINIT_SUBMODULES_SHELL)))


all: $(OBJ_DIR)/$(PROJECT).elf $(OBJ_DIR)/$(PROJECT).hex $(OBJ_DIR)/$(PROJECT).bin $(OBJ_DIR)/$(PROJECT).dfu $(OBJ_DIR)/$(PROJECT).json
	@:

$(OBJ_DIR)/$(PROJECT).elf: $(OBJECTS)
	@echo "\tLD\t" $@
	@$(LD) $(LDFLAGS) $(OBJECTS) -o $@
	@$(SZ) $@

$(OBJ_DIR)/$(PROJECT).hex: $(OBJ_DIR)/$(PROJECT).elf
	@echo "\tHEX\t" $@
	@$(HEX) $< $@

$(OBJ_DIR)/$(PROJECT).bin: $(OBJ_DIR)/$(PROJECT).elf
	@echo "\tBIN\t" $@
	@$(BIN) $< $@

$(OBJ_DIR)/$(PROJECT).dfu: $(OBJ_DIR)/$(PROJECT).bin
	@echo "\tDFU\t" $@
	@../scripts/bin2dfu.py \
		-i $(OBJ_DIR)/$(PROJECT).bin \
		-o $(OBJ_DIR)/$(PROJECT).dfu \
		-a $(FLASH_ADDRESS) \
		-l "Flipper Zero $(shell echo $(TARGET) | tr a-z A-Z)" > /dev/null

$(OBJ_DIR)/$(PROJECT).json: $(OBJ_DIR)/$(PROJECT).dfu
	@echo "\tJSON\t" $@
	@$(PROJECT_ROOT)/scripts/meta.py generate -p $(PROJECT) $(CFLAGS) > $(OBJ_DIR)/$(PROJECT).json

$(OBJ_DIR)/%.o: %.c $(OBJ_DIR)/BUILD_FLAGS
	@echo "\tCC\t" $(subst $(PROJECT_ROOT)/, , $<)
	@$(CC) $(CFLAGS) -c $< -o $@

$(OBJ_DIR)/%.o: %.s $(OBJ_DIR)/BUILD_FLAGS
	@echo "\tASM\t" $(subst $(PROJECT_ROOT)/, , $<)
	@$(AS) $(CFLAGS) -c $< -o $@

$(OBJ_DIR)/%.o: %.cpp $(OBJ_DIR)/BUILD_FLAGS
	@echo "\tCPP\t" $(subst $(PROJECT_ROOT)/, , $<)
	@$(CPP) $(CFLAGS) $(CPPFLAGS) -c $< -o $@

$(OBJ_DIR)/flash: $(OBJ_DIR)/$(PROJECT).bin
	openocd $(OPENOCD_OPTS) -c "program $(OBJ_DIR)/$(PROJECT).bin reset exit $(FLASH_ADDRESS)" 
	touch $@

$(OBJ_DIR)/upload: $(OBJ_DIR)/$(PROJECT).bin
	dfu-util -d 0483:df11 -D $(OBJ_DIR)/$(PROJECT).bin -a 0 -s $(FLASH_ADDRESS) $(DFU_OPTIONS)
	touch $@

.PHONY: flash
flash: $(OBJ_DIR)/flash

.PHONY: upload
upload: $(OBJ_DIR)/upload

.PHONY: debug
debug: flash
	$(GDB) \
		-ex 'target extended-remote | openocd -c "gdb_port pipe" $(OPENOCD_OPTS)' \
		-ex "set confirm off" \
		-ex "source ../debug/FreeRTOS/FreeRTOS.py" \
		-ex "source ../debug/PyCortexMDebug/PyCortexMDebug.py" \
		-ex "svd_load $(SVD_FILE)" \
		-ex "compare-sections" \
		$(OBJ_DIR)/$(PROJECT).elf; \

.PHONY: debug_other
debug_other:
	$(GDB) \
		-ex 'target extended-remote | openocd -c "gdb_port pipe" $(OPENOCD_OPTS)' \
		-ex "set confirm off" \
		-ex "source ../debug/PyCortexMDebug/PyCortexMDebug.py" \
		-ex "svd_load $(SVD_FILE)" \

.PHONY: blackmagic
blackmagic:
	$(GDB) \
		-ex 'target extended-remote $(BLACKMAGIC)' \
		-ex 'monitor swdp_scan' \
		-ex 'monitor debug_bmp enable' \
		-ex 'attach 1' \
		-ex 'set confirm off' \
		-ex 'set mem inaccessible-by-default off' \
		-ex "source ../debug/FreeRTOS/FreeRTOS.py" \
		-ex "source ../debug/PyCortexMDebug/PyCortexMDebug.py" \
		-ex "svd_load $(SVD_FILE)" \
		-ex "compare-sections" \
		$(OBJ_DIR)/$(PROJECT).elf; \

.PHONY: openocd
openocd:
	openocd $(OPENOCD_OPTS)

.PHONY: clean
clean:
	@echo "\tCLEAN\t"
	@$(RM) -rf $(OBJ_DIR)

.PHONY: z
z: clean
	$(MAKE) all

.PHONY: zz
zz: clean
	$(MAKE) flash

.PHONY: zzz
zzz: clean
	$(MAKE) debug

.PHONY: generate_cscope_db
generate_cscope_db:
	@echo "$(C_SOURCES) $(CPP_SOURCES) $(ASM_SOURCES)" | tr ' ' '\n' > $(OBJ_DIR)/source.list.p
	@cat ~/headers.list >> $(OBJ_DIR)/source.list.p
	@cat $(OBJ_DIR)/source.list.p | sed -e "s|^[^//]|$$PWD/&|g" > $(OBJ_DIR)/source.list
	@cscope -b -k -i $(OBJ_DIR)/source.list -f $(OBJ_DIR)/cscope.out
	@rm -rf $(OBJ_DIR)/source.list $(OBJ_DIR)/source.list.p

.PHONY: generate_compile_db
generate_compile_db:
	@echo "$(ASM_SOURCES)" | tr ' ' '\n' > $(OBJ_DIR)/db.asm_source.list
	@echo "$(C_SOURCES)" | tr ' ' '\n' > $(OBJ_DIR)/db.c_source.list
	@echo "$(CPP_SOURCES)" | tr ' ' '\n' > $(OBJ_DIR)/db.cpp_source.list
	@echo "$(AS)$(CFLAGS)" | tr ' ' '\n' > $(OBJ_DIR)/db.asm_flags.list
	@echo "$(CC)$(CFLAGS)" | tr ' ' '\n' > $(OBJ_DIR)/db.c_flags.list
	@echo "$(CPP)$(CFLAGS)$(CPPFLAGS)" | tr ' ' '\n' > $(OBJ_DIR)/db.cpp_flags.list
	@$(PROJECT_ROOT)/scripts/compile_db.py generate -p $(OBJ_DIR)
	@rm $(OBJ_DIR)/db.asm_source.list
	@rm $(OBJ_DIR)/db.c_source.list
	@rm $(OBJ_DIR)/db.cpp_source.list
	@rm $(OBJ_DIR)/db.asm_flags.list
	@rm $(OBJ_DIR)/db.c_flags.list
	@rm $(OBJ_DIR)/db.cpp_flags.list

# Prevent make from searching targets for real files
%.d: ;

%.c: ;

%.cpp: ;

%.s: ;

$(OBJ_DIR)/BUILD_FLAGS: ;

-include $(DEPS)