SHELL  := /bin/bash
CC     := cc
CFLAGS := -Wall -O2
TARGET := fa2json
SRCS   := fs-watcher.c json-writer.c

.PHONY: all test clean

all: $(TARGET)

$(TARGET): $(SRCS)
	$(CC) $(CFLAGS) -o $@ $^

# Requires root (fanotify FID + mount needs CAP_SYS_ADMIN).
# Loop device and mount are cleaned up automatically on exit.
# If the test aborts unexpectedly, check: losetup -l and /proc/mounts
test: $(TARGET)
	@set -euo pipefail; \
	IMG=""; MNTDIR=""; LOOPDEV=""; FA2JSON_PID=""; \
	cleanup() { \
		[ -n "$$FA2JSON_PID" ] && { kill "$$FA2JSON_PID" 2>/dev/null; wait "$$FA2JSON_PID" 2>/dev/null || true; }; \
		[ -n "$$MNTDIR" ]      && umount "$$MNTDIR"    2>/dev/null || true; \
		[ -n "$$LOOPDEV" ]     && losetup -d "$$LOOPDEV" 2>/dev/null || true; \
		[ -n "$$IMG" ]         && rm -f "$$IMG"; \
		[ -n "$$MNTDIR" ]      && rmdir "$$MNTDIR"     2>/dev/null || true; \
	}; \
	trap cleanup EXIT; \
	IMG=$$(mktemp /tmp/fa2json-test-XXXXXX.img); \
	MNTDIR=$$(mktemp -d /tmp/fa2json-mnt-XXXXXX); \
	echo "--- Creating 10M ext4 image ---"; \
	dd if=/dev/zero of="$$IMG" bs=1M count=10 status=none; \
	mkfs.ext4 -q "$$IMG"; \
	LOOPDEV=$$(losetup --find --show "$$IMG"); \
	mount "$$LOOPDEV" "$$MNTDIR"; \
	echo "--- Starting fa2json on $$MNTDIR ---"; \
	./$(TARGET) "$$MNTDIR" & FA2JSON_PID=$$!; \
	sleep 0.3; \
	echo "--- Filesystem operations ---"; \
	mkdir "$$MNTDIR/dir_a"; \
	touch "$$MNTDIR/file_a.txt"; \
	echo "content" >> "$$MNTDIR/file_a.txt"; \
	mkdir "$$MNTDIR/dir_b"; \
	touch "$$MNTDIR/dir_b/nested.txt"; \
	mv "$$MNTDIR/file_a.txt" "$$MNTDIR/file_b.txt"; \
	mv "$$MNTDIR/dir_b" "$$MNTDIR/dir_a/dir_b_moved"; \
	chmod 600 "$$MNTDIR/file_b.txt"; \
	touch -m "$$MNTDIR/file_b.txt"; \
	chmod 755 "$$MNTDIR/dir_a"; \
	rm "$$MNTDIR/file_b.txt"; \
	rm "$$MNTDIR/dir_a/dir_b_moved/nested.txt"; \
	rm -rf "$$MNTDIR/dir_a"; \
	sleep 0.3; \
	echo "--- Done ---"

clean:
	rm -f $(TARGET)