# Makefile for MicroPython on ESP32.
#
# This is a simple, convenience wrapper around idf.py (which uses CMake).

include ../../py/verbose.mk

# -------------------------------------------------------------------------
# Board Selection
# -------------------------------------------------------------------------

ifdef BOARD_DIR
  BOARD ?= $(notdir $(BOARD_DIR:/=))
else
  BOARD ?= ESP32_GENERIC
  BOARD_DIR ?= boards/$(BOARD)
endif

ifeq ($(wildcard $(BOARD_DIR)/.),)
  ifeq ($(findstring boards/GENERIC,$(BOARD_DIR)),boards/GENERIC)
    $(warning The GENERIC* boards have been renamed to ESP32_GENERIC*)
  endif
  $(error Invalid BOARD specified: $(BOARD_DIR))
endif

# Build directory naming
ifneq ($(BOARD_VARIANT),)
  BUILD ?= build-$(BOARD)-$(BOARD_VARIANT)
else
  BUILD ?= build-$(BOARD)
endif

# -------------------------------------------------------------------------
# Serial Settings
# -------------------------------------------------------------------------

ifneq ($(PORT),)
  PORT_ARG := -p $(PORT)
endif
ifneq ($(BAUD),)
  BAUD_ARG := -b $(BAUD)
endif
DEVICE += $(PORT_ARG) $(BAUD_ARG)

PYTHON ?= python3

# -------------------------------------------------------------------------
# IDF/CMake Flags
# -------------------------------------------------------------------------

CMAKE_ARGS =
ifdef USER_C_MODULES
  CMAKE_ARGS += -DUSER_C_MODULES=${USER_C_MODULES}
endif

IDFPY_FLAGS += -D MICROPY_BOARD=$(BOARD) -D MICROPY_BOARD_DIR="$(abspath $(BOARD_DIR))" $(CMAKE_ARGS)

ifdef FROZEN_MANIFEST
  IDFPY_FLAGS += -D MICROPY_FROZEN_MANIFEST=$(FROZEN_MANIFEST)
endif

ifdef BOARD_VARIANT
  IDFPY_FLAGS += -D MICROPY_BOARD_VARIANT=$(BOARD_VARIANT)
endif

ifdef MICROPY_PREVIEW_VERSION_2
  IDFPY_FLAGS += -D MICROPY_PREVIEW_VERSION_2=1
endif

ifeq ($(BUILD_VERBOSE),1)
  IDFPY_FLAGS += --verbose
endif

HELP_BUILD_ERROR ?= "See \033[1;31mhttps://github.com/micropython/micropython/wiki/Build-Troubleshooting\033[0m"

# -------------------------------------------------------------------------
# Command Wrapper
# -------------------------------------------------------------------------

define RUN_IDF_PY
  $(Q)idf.py $(IDFPY_FLAGS) -B $(BUILD) $(1)
endef

# -------------------------------------------------------------------------
# Targets
# -------------------------------------------------------------------------

.PHONY: all clean deploy erase submodules FORCE help

all:
	$(Q)idf.py $(IDFPY_FLAGS) -B $(BUILD) build || (echo -e $(HELP_BUILD_ERROR); false)
	$(Q)$(PYTHON) makeimg.py \
		$(BUILD)/sdkconfig \
		$(BUILD)/bootloader/bootloader.bin \
		$(BUILD)/partition_table/partition-table.bin \
		$(BUILD)/micropython.bin \
		$(BUILD)/firmware.bin \
		$(BUILD)/micropython.uf2

$(BUILD)/bootloader/bootloader.bin \
$(BUILD)/partition_table/partition-table.bin \
$(BUILD)/micropython.bin: FORCE

clean:
	$(call RUN_IDF_PY,fullclean)

deploy:
	$(call RUN_IDF_PY,$(DEVICE) flash)

erase:
	$(call RUN_IDF_PY,$(DEVICE) erase-flash)

monitor:
	$(call RUN_IDF_PY,$(DEVICE) monitor)

size:
	$(call RUN_IDF_PY,size)

size-components:
	$(call RUN_IDF_PY,size-components)

size-files:
	$(call RUN_IDF_PY,size-files)

submodules:
	$(Q)IDF_COMPONENT_MANAGER=0 idf.py $(IDFPY_FLAGS) -B $(BUILD)/submodules -D UPDATE_SUBMODULES=1 reconfigure

# -------------------------------------------------------------------------
# Help: list available boards and variants
# -------------------------------------------------------------------------

help:
	@echo "Available BOARD options:"
	@cd boards && find . -maxdepth 1 -type d | sed 's|^\./||' | grep -v '^\.$$'
	@echo ""
	@echo "Available BOARD_VARIANT options per board:"
	@for b in boards/*; do \
	  if [ -d "$$b" ]; then \
	    board=$$(basename $$b); \
	    variants=$$(cd $$b && ls mpconfigvariant_*.cmake 2>/dev/null | sed 's/^mpconfigvariant_//' | sed 's/\.cmake$$//'); \
	    if [ -n "$$variants" ]; then \
	      echo "  $$board: $$variants"; \
	    fi; \
	  fi; \
	done