#!/bin/bash
# Functional test for dashcam-transfer-cleanup.sh using fake tools on PATH.
set -u

SCRIPT="$(cd "$(dirname "$0")/.." && pwd)/dashcam-transfer-cleanup.sh"
WORK=$(mktemp -d)
trap 'rm -rf "$WORK"' EXIT

FAKEBIN="$WORK/bin"
mkdir -p "$FAKEBIN"

LOGGER_FILE="$WORK/logger.log"
UMOUNT_MARKER="$WORK/umounted"
LAZY_MARKER="$WORK/lazy"
STOP_MARKER="$WORK/stopped"

export LOGGER_FILE UMOUNT_MARKER LAZY_MARKER STOP_MARKER FAKE_SRC FAKE_UMOUNT_FAIL

cat > "$FAKEBIN/logger" <<'EOF'
#!/bin/bash
echo "logger: $*" >> "$LOGGER_FILE"
EOF

cat > "$FAKEBIN/findmnt" <<'EOF'
#!/bin/bash
if [ -z "$FAKE_SRC" ]; then
    exit 1
fi
echo "$FAKE_SRC"
EOF

cat > "$FAKEBIN/systemctl" <<'EOF'
#!/bin/bash
if [ "$1" = "stop" ]; then
    touch "$STOP_MARKER"
fi
EOF

cat > "$FAKEBIN/umount" <<'EOF'
#!/bin/bash
if [ "${1:-}" = "-l" ]; then
    touch "$LAZY_MARKER"
    exit 0
fi
if [ "$FAKE_UMOUNT_FAIL" = "1" ]; then
    exit 1
fi
touch "$UMOUNT_MARKER"
EOF

chmod +x "$FAKEBIN"/*

pass=0
fail=0
check() { # $1=desc, $2=condition
    if eval "$2"; then
        echo "PASS: $1"
        pass=$((pass + 1))
    else
        echo "FAIL: $1"
        fail=$((fail + 1))
    fi
}

reset() {
    rm -f "$LOGGER_FILE" "$UMOUNT_MARKER" "$LAZY_MARKER" "$STOP_MARKER"
    unset FAKE_UMOUNT_FAIL
}

# Test 1: niet gemount → niets te doen
reset
FAKE_SRC=""
PATH="$FAKEBIN:$PATH" "$SCRIPT"
check "niet gemount → geen umount" 'test ! -e "$UMOUNT_MARKER"'
check "niet gemount → geen service stop" 'test ! -e "$STOP_MARKER"'

# Test 2: device nog aanwezig → mount blijft
reset
FAKE_SRC="$WORK/fake-device"
touch "$FAKE_SRC"
PATH="$FAKEBIN:$PATH" "$SCRIPT"
check "device aanwezig → geen umount" 'test ! -e "$UMOUNT_MARKER"'
check "device aanwezig → geen service stop" 'test ! -e "$STOP_MARKER"'

# Test 3: device verdwenen → stop + umount
reset
FAKE_SRC="$WORK/gone-device"
PATH="$FAKEBIN:$PATH" "$SCRIPT"
check "device weg → service gestopt" 'test -e "$STOP_MARKER"'
check "device weg → umount uitgevoerd" 'test -e "$UMOUNT_MARKER"'
check "device weg → geen lazy nodig" 'test ! -e "$LAZY_MARKER"'

# Test 4: umount mislukt → lazy umount
reset
FAKE_SRC="$WORK/gone-device"
export FAKE_UMOUNT_FAIL=1
PATH="$FAKEBIN:$PATH" "$SCRIPT"
check "umount faalt → lazy umount" 'test -e "$LAZY_MARKER"'

# Test 5: node bestaat nog maar source = verwijderd device → stale
reset
mkdir -p "$WORK/dev"
touch "$WORK/dev/sde1"
FAKE_SRC="$WORK/dev/sde1"
PATH="$FAKEBIN:$PATH" "$SCRIPT" sde1
check "source matcht verwijderd device → umount" 'test -e "$UMOUNT_MARKER"'
check "source matcht verwijderd device → service gestopt" 'test -e "$STOP_MARKER"'

# Test 6: ander device verwijdert, sdcard-healthy → niets doen
reset
touch "$WORK/dev/sdb2"
FAKE_SRC="$WORK/dev/sde1"
PATH="$FAKEBIN:$PATH" "$SCRIPT" sdb2
check "ander device → geen umount" 'test ! -e "$UMOUNT_MARKER"'
check "ander device → geen service stop" 'test ! -e "$STOP_MARKER"'

echo "=== $pass pass, $fail fail ==="
[ "$fail" -eq 0 ]