# Canonical firmware: clone https://github.com/crosspoint-reader/crosspoint-reader
# next to this repo, then build its PlatformIO `default` environment.
FIRMWARE_REPO ?= ../crosspoint-reader
FIRMWARE_DIR ?= $(FIRMWARE_REPO)/.pio/build/default
SD_SRC ?= $(FIRMWARE_REPO)/sdcard
# Native and wasm builds share the third_party/qemu submodule; edit it in place
# and both recompile incrementally. Native output lives in build-native so it
# never clobbers the Emscripten build/ config.
QEMU_SRC ?= third_party/qemu
QEMU_BIN = $(QEMU_SRC)/build-native/qemu-system-riscv32
QEMU_WASM_SRC ?= third_party/qemu
WASM_OUT ?= dist/wasm
VARIANT ?= x3

.PHONY: firmware sdimage qemu qemu-wasm web web-test test browser-test run run-upstream chip clean

firmware:
	esptool --chip esp32c3 merge-bin -o flash.bin \
	  0x0 $(FIRMWARE_DIR)/bootloader.bin \
	  0x8000 $(FIRMWARE_DIR)/partitions.bin \
	  0x10000 $(FIRMWARE_DIR)/firmware.bin
	truncate -s 16M flash.bin
	cp $(FIRMWARE_DIR)/firmware.elf firmware.elf

# Local-disk implementation of the SD block interface.
sdimage:
	scripts/mksd.sh $(SD_SRC) sd.img

qemu:
	QEMU_SRC=$(QEMU_SRC) scripts/build-qemu.sh

qemu-wasm:
	QEMU_WASM_SRC=$(QEMU_WASM_SRC) WASM_OUT=$(WASM_OUT) scripts/build-qemu-wasm.sh

# Serve over HTTPS by default so headless/LAN access is cross-origin isolated. Override with WEB_TLS=.
WEB_TLS ?= --tls
web: qemu-wasm
	python3 scripts/serve-web.py $(WEB_TLS)

web-test:
	node scripts/test-web.mjs

test:
	$(MAKE) -C tests test

browser-test:
	$(MAKE) -C tests browser

# Select X4 with `make run VARIANT=x4`. Add `-display none` for headless.
run: qemu
	@sd=sd.img; tmpdir=; \
	  if [ ! -f "$$sd" ]; then \
	    tmpdir=$$(mktemp -d); mkdir "$$tmpdir/empty"; sd="$$tmpdir/sd.img"; \
	    SIZE_MB=64 scripts/mksd.sh "$$tmpdir/empty" "$$sd" >/dev/null; \
	    echo "Using a blank ephemeral SD card; writes will be discarded when QEMU exits."; \
	  fi; \
	  trap 'rm -rf "$$tmpdir"' EXIT; \
	  $(QEMU_BIN) -machine xteink,variant=$(VARIANT) -L $(QEMU_SRC)/pc-bios \
	    -serial stdio -drive file=flash.bin,if=mtd,format=raw \
	    -drive file="$$sd",if=sd,format=raw

# Unpatched release binary retained as the fast generic ESP32-C3 baseline.
run-upstream:
	nix run .#run-upstream -- flash.bin

# Legacy Wokwi protocol model; retained as a small host-tested reference.
chip:
	$(MAKE) -C chip

clean:
	$(MAKE) -C chip clean
	rm -f flash.bin flash16.bin firmware.elf