# Top-level build Makefile for NES disassembly projects
# Builds every project under the mapper directories at once.
#
# Two tiers live in this repo:
#   <MAPPER>/<Project>/       promoted projects  - built by "all", "clean" and "<MAPPER>"
#   _wip/<MAPPER>/<Project>/  pre-promotion tier - built only by "wip"
# Nothing except "wip"/"wipclean" touches the _wip/ tree.

MAPPERS := NROM AOROM CNROM MMC1 MMC3 MMC5 UNROM MAPPER8

# The pre-promotion tier lives under _wip/.  Only the "wip" and "wipclean"
# targets reach it; "all", "clean" and "<MAPPER>" never do.
WIP := _wip

.PHONY: all clean wip wipclean $(MAPPERS) help

# Build one project directory. Expects the shell variable "project" to hold
# the project path; records the result in status/passed/failed/count.
define build_project
if [ -f "$$project/Makefile" ]; then \
	echo "=== Building $$project ==="; \
	count=$$((count + 1)); \
	if $(MAKE) -C "$$project"; then \
		printf '%b' "$$GREEN"; \
		echo ">>> $$project: Passed"; \
		printf '%b' "$$RESET"; \
		passed="$$passed|$$project"; \
	else \
		printf '%b' "$$RED"; \
		echo ">>> $$project: Failed"; \
		printf '%b' "$$RESET"; \
		failed="$$failed|$$project"; \
		status=1; \
	fi; \
else \
	echo "=== Skipping $$project (no Makefile) ==="; \
fi;
endef

# Print the pass/fail summary. Expects the shell variables status/passed/
# failed/count and msg (the success headline) to be set.
define summary
echo ""; \
echo "=== $1 Summary ==="; \
printf '%b' "$$GREEN"; \
pcount=$$(echo "$$passed" | tr '|' '\n' | grep -c .); \
echo "Passed ($$pcount):"; \
echo "$$passed" | tr '|' '\n' | grep -v '^$$' | sed 's/^/  - /'; \
printf '%b' "$$RESET"; \
if [ -n "$$failed" ]; then \
	printf '%b' "$$RED$$BOLD"; \
	fcount=$$(echo "$$failed" | tr '|' '\n' | grep -c .); \
	echo "Failed ($$fcount):"; \
	echo "$$failed" | tr '|' '\n' | grep -v '^$$' | sed 's/^/  - /'; \
	printf '%b' "$$RESET"; \
fi; \
if [ $$status -eq 0 ]; then \
	printf '%b' "$$GREEN$$BOLD"; \
	echo ">>> $$msg"; \
	printf '%b' "$$RESET"; \
else \
	printf '%b' "$$RED$$BOLD"; \
	echo ">>> Some projects Failed"; \
	printf '%b' "$$RESET"; \
fi;
endef

all:
	@status=0; \
	GREEN='\033[32m'; RED='\033[31m'; BOLD='\033[1m'; RESET='\033[0m'; \
	passed=""; failed=""; count=0; \
	for m in $(MAPPERS); do \
		for d in "$$m"/*/; do \
			[ -d "$$d" ] || continue; \
			project="$${d%/}"; \
			$(call build_project) \
		done; \
	done; \
	msg="All $$count Projects Passed"; \
	$(call summary,Build) \
	exit $$status

clean:
	@status=0; \
	for m in $(MAPPERS); do \
		for d in "$$m"/*/; do \
			[ -d "$$d" ] || continue; \
			project="$${d%/}"; \
			if [ -f "$$project/Makefile" ]; then \
				echo "=== Cleaning $$project ==="; \
				$(MAKE) -C "$$project" clean || status=1; \
			fi; \
		done; \
	done; \
	exit $$status

# Pre-promotion tier (_wip/<MAPPER>/<Project>/). Explicitly opt-in: no other
# target builds, cleans or otherwise reaches into the _wip/ tree.
wip:
	@status=0; \
	GREEN='\033[32m'; RED='\033[31m'; BOLD='\033[1m'; RESET='\033[0m'; \
	passed=""; failed=""; count=0; \
	for m in $(WIP)/*/; do \
		[ -d "$$m" ] || continue; \
		for d in "$$m"*/; do \
			[ -d "$$d" ] || continue; \
			project="$${d%/}"; \
			$(call build_project) \
		done; \
	done; \
	msg="All $$count WIP Projects Passed"; \
	$(call summary,WIP Build) \
	exit $$status

# Clean the pre-promotion tier only.
wipclean:
	@status=0; \
	for m in $(WIP)/*/; do \
		[ -d "$$m" ] || continue; \
		for d in "$$m"*/; do \
			[ -d "$$d" ] || continue; \
			project="$${d%/}"; \
			if [ -f "$$project/Makefile" ]; then \
				echo "=== Cleaning $$project ==="; \
				$(MAKE) -C "$$project" clean || status=1; \
			fi; \
		done; \
	done; \
	exit $$status

# Per-mapper targets, e.g. "make MMC3"
$(MAPPERS):
	@status=0; \
	GREEN='\033[32m'; RED='\033[31m'; BOLD='\033[1m'; RESET='\033[0m'; \
	passed=""; failed=""; count=0; \
	for d in "$@"/*/; do \
		[ -d "$$d" ] || continue; \
		project="$${d%/}"; \
		$(call build_project) \
	done; \
	msg="All $$count $@ Projects Passed"; \
	$(call summary,$@ Build) \
	exit $$status

help:
	@echo "Usage: make [target]"
	@echo ""
	@echo "Targets:"
	@echo "  all      - Build and verify every promoted project (all mappers)"
	@echo "  clean    - Clean build artifacts in every promoted project"
	@echo "  <MAPPER> - Build only one mapper: $(MAPPERS)"
	@echo "  wip      - Build and verify every project under $(WIP)/ (pre-promotion tier)"
	@echo "  wipclean - Clean build artifacts under $(WIP)/"
	@echo "  help     - Show this help"