# Copyright (c) 2022 Status Research & Development GmbH. Licensed under
# either of:
# - Apache License, version 2.0
# - MIT license
# at your option. This file may not be copied, modified, or distributed except
# according to those terms.

###########################
## nat-libs (nimbledeps) ##
###########################
# Builds miniupnpc and libnatpmp from the package installed by nimble under
# nimbledeps/pkgs2/. Used by `make update` / $(NIMBLEDEPS_STAMP).
#
# NAT_TRAVERSAL_NIMBLEDEPS_DIR is evaluated at parse time, so targets that
# depend on it must be invoked via a recursive $(MAKE) call so the sub-make
# re-evaluates the variable after nimble setup has populated nimbledeps/.
#
# `ls -dt` (sort by modification time, newest first) is used to pick the
# latest installed version and is portable across Linux, macOS, and
# Windows (MSYS/MinGW).

NAT_TRAVERSAL_NIMBLEDEPS_DIR := $(shell ls -dt $(CURDIR)/nimbledeps/pkgs2/nat_traversal-* 2>/dev/null | head -1)

.PHONY: clean-cross-nimbledeps rebuild-nat-libs-nimbledeps

clean-cross-nimbledeps:
ifeq ($(NAT_TRAVERSAL_NIMBLEDEPS_DIR),)
	$(error No nat_traversal package found under nimbledeps/pkgs2/ — run 'make update' first)
endif
	+ [ -e "$(NAT_TRAVERSAL_NIMBLEDEPS_DIR)/vendor/miniupnp/miniupnpc" ] && \
		"$(MAKE)" -C "$(NAT_TRAVERSAL_NIMBLEDEPS_DIR)/vendor/miniupnp/miniupnpc" CC=$(CC) clean $(HANDLE_OUTPUT) || true
	+ [ -e "$(NAT_TRAVERSAL_NIMBLEDEPS_DIR)/vendor/libnatpmp-upstream" ] && \
		"$(MAKE)" -C "$(NAT_TRAVERSAL_NIMBLEDEPS_DIR)/vendor/libnatpmp-upstream" CC=$(CC) clean $(HANDLE_OUTPUT) || true

rebuild-nat-libs-nimbledeps: | clean-cross-nimbledeps
ifeq ($(NAT_TRAVERSAL_NIMBLEDEPS_DIR),)
	$(error No nat_traversal package found under nimbledeps/pkgs2/ — run 'make update' first)
endif
	@echo "Rebuilding nat-libs from $(NAT_TRAVERSAL_NIMBLEDEPS_DIR)"
ifeq ($(OS), Windows_NT)
	+ [ -e "$(NAT_TRAVERSAL_NIMBLEDEPS_DIR)/vendor/miniupnp/miniupnpc/libminiupnpc.a" ] || \
		PATH=".;$${PATH}" "$(MAKE)" -C "$(NAT_TRAVERSAL_NIMBLEDEPS_DIR)/vendor/miniupnp/miniupnpc" \
		-f Makefile.mingw CC=$(CC) CFLAGS="-Os -fPIC" libminiupnpc.a $(HANDLE_OUTPUT)
	+ "$(MAKE)" -C "$(NAT_TRAVERSAL_NIMBLEDEPS_DIR)/vendor/libnatpmp-upstream" \
		OS=mingw CC=$(CC) \
		CFLAGS="-Wall -Wno-cpp -Os -fPIC -DWIN32 -DNATPMP_STATICLIB -DENABLE_STRNATPMPERR -DNATPMP_MAX_RETRIES=4 $(CFLAGS)" \
		libnatpmp.a $(HANDLE_OUTPUT)
else
	+ "$(MAKE)" -C "$(NAT_TRAVERSAL_NIMBLEDEPS_DIR)/vendor/miniupnp/miniupnpc" \
		CC=$(CC) CFLAGS="-Os -fPIC" build/libminiupnpc.a $(HANDLE_OUTPUT)
	+ "$(MAKE)" CFLAGS="-Wall -Wno-cpp -Os -fPIC -DENABLE_STRNATPMPERR -DNATPMP_MAX_RETRIES=4 $(CFLAGS)" \
		-C "$(NAT_TRAVERSAL_NIMBLEDEPS_DIR)/vendor/libnatpmp-upstream" \
		CC=$(CC) libnatpmp.a $(HANDLE_OUTPUT)
endif