#!/usr/bin/env bash
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
WATCHER="$SCRIPT_DIR/../docker-critical-events.sh"

if [ ! -r "$WATCHER" ]; then
  echo "FAIL: watcher not readable at $WATCHER" >&2
  exit 1
fi

tmp="$(mktemp -d)"
trap 'rm -rf "$tmp"' EXIT

mkdir -p "$tmp/bin"
cat > "$tmp/bin/docker" <<'EOF'
#!/usr/bin/env bash
if [ "${1:-}" != "events" ]; then
  echo "unexpected docker command: $*" >&2
  exit 1
fi

cat <<'EVENTS'
{"Type":"container","Action":"die","Actor":{"Attributes":{"name":"ok-container","image":"example:latest","exitCode":"0"}}}
{"Type":"container","Action":"die","Actor":{"Attributes":{"name":"bad-container","image":"example:latest","exitCode":"137"}}}
{"Type":"container","Action":"oom","Actor":{"Attributes":{"name":"oom-container","image":"example:latest"}}}
EVENTS
EOF
chmod +x "$tmp/bin/docker"

PATH="$tmp/bin:$PATH" \
SEND_NTFY=0 \
OUTPUT_PATH="$tmp/events.log" \
bash "$WATCHER"

fail() {
  echo "FAIL: $*" >&2
  echo "--- events.log ---" >&2
  cat "$tmp/events.log" >&2 || true
  exit 1
}

[ -s "$tmp/events.log" ] || fail "expected critical event log to be written"

if grep -q 'ok-container' "$tmp/events.log"; then
  fail "exitCode 0 die event should not alert"
fi

grep -q 'bad-container' "$tmp/events.log" || fail "non-zero die event missing"
grep -q 'oom-container' "$tmp/events.log" || fail "oom event missing"

line_count="$(wc -l < "$tmp/events.log" | tr -d ' ')"
[ "$line_count" = "2" ] || fail "expected 2 logged critical events, got $line_count"

echo "OK - docker critical events filter test passed"