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

NTFY_SCRIPT="${NTFY_SCRIPT:-/mnt/user/services/homelab-infra/ops/restore-tests/send-ntfy.sh}"
NTFY_TOPIC="${NTFY_TOPIC:-kallilab-critical}"
SEND_NTFY="${SEND_NTFY:-1}"
OUTPUT_PATH="${OUTPUT_PATH:-/mnt/user/services/posture-check/docker-critical-events-last.log}"
EVENT_FILTERS="${EVENT_FILTERS:---filter event=die --filter event=oom --filter event=kill}"

mkdir -p "$(dirname "$OUTPUT_PATH")"

send_event() {
  local line="$1"
  local timestamp
  timestamp="$(date -Iseconds)"

  printf '%s %s\n' "$timestamp" "$line" | tee -a "$OUTPUT_PATH" >/dev/null

  if [ "$SEND_NTFY" = "1" ] && [ -f "$NTFY_SCRIPT" ]; then
    bash "$NTFY_SCRIPT" "$NTFY_TOPIC" "Docker critical event" "$line" high || true
  fi
}

if ! command -v docker >/dev/null 2>&1; then
  echo "docker command not found" >&2
  exit 127
fi

# shellcheck disable=SC2086
docker events $EVENT_FILTERS --format '{{json .}}' | while IFS= read -r event; do
  [ -n "$event" ] || continue
  send_event "$event"
done