export PATH := $(CURDIR)/esp-open-sdk/xtensa-lx106-elf/bin:$(PATH)
export CPATH := $(CURDIR)/esp-open-sdk/sdk/include:$(CPATH)

MP_PORT = micropython/ports/esp8266

MOD_DIR = $(MP_PORT)/modules

MP_UNIX = micropython/ports/unix/micropython

SRC_MODULES = src/app_loader.py src/settings.py

# MOD_TO_SRC_REL = $(shell realpath --relative-to $(MOD_DIR) src)

LIB_SYMLINKS = $(patsubst src/%.py,$(MOD_DIR)/%.py,$(SRC_MODULES))
# LIB_SYMLINK_TARGETS = $(patsubst %.py,$(MOD_DIR)/%.py,$(SRC_MODULES))

build: micropython

clean:
	$(MAKE) -C $(MP_PORT) clean clean-frozen
	rm .requirements.txt.installed


deploy: micropython
	( \
	    [ -f python2-venv/bin/activate ] && source python2-venv/bin/activate; \
	    $(MAKE) -C $(MP_PORT) deploy BAUD=460800; \
	)

erase: micropython
	( \
	    [ -f python2-venv/bin/activate ] && source python2-venv/bin/activate; \
	    $(MAKE) -C $(MP_PORT) erase; \
	)


check-esp-sdk:
	@echo -n ":: Checking ESP SDK: "
	@if (which xtensa-lx106-elf-gcc 2> /dev/null) ; then \
	    echo "success"; \
	else \
	    echo "error: SDK not found. Add the location of xtensa-lx106-elf-gcc to PATH or run setup_sdk.sh to install the SDK locally"; \
	    false; \
	fi


.requirements.txt.installed: requirements.txt $(MP_UNIX)
	cat requirements.txt | xargs -n1 $(MP_UNIX) -m upip install -p $(MOD_DIR)
	touch $@

$(MOD_DIR)/%.py: src/%.py
	ln -s $(shell realpath --relative-to $(MOD_DIR) $<) $@

$(MP_UNIX):
	make -C micropython/ports/unix

frozen-libs: .requirements.txt.installed $(LIB_SYMLINKS)

micropython: micropython/ports/esp8266/build/firmware-combined.bin


micropython/ports/esp8266/build/firmware-combined.bin: check-and-reinit-micropython-submodules check-esp-sdk frozen-libs
	$(MAKE) -C micropython/mpy-cross
	( \
	    [ -f python2-venv/bin/activate ] && source python2-venv/bin/activate; \
	    $(MAKE) -C $(MP_PORT); \
	)


check-and-reinit-submodules:
	@echo ":: Checking submodules"
	@if git submodule status | egrep -q '^[-]|^[+]' ; then \
	    echo "INFO: Need to reinitialize git submodules"; \
	    git submodule update --init; \
	fi

check-and-reinit-micropython-submodules: check-and-reinit-submodules
	@echo -n ":: Checking micropython submodules: "
	@if cd micropython; git submodule status | egrep -q '^[-]|^[+]' ; then \
	    echo "info: Need to reinitialize micropython git submodules"; \
	    git submodule update --init; \
	else \
	    echo "success"; \
	fi

.PHONY: check-and-reinit-submodules check-and-reinit-micropython-submodules check-esp-sdk clean