function cmd::activity::on_load() {
  load_module net

  flag::register --peer
  flag::register --service
  flag::register --ip
  flag::register --hours
  flag::register --type
  flag::register --dropped
}

# ============================================
# Help
# ============================================

function cmd::activity::help() {
function cmd::activity::run() {
  local filter_peer="" filter_service="" filter_ip="" filter_type=""
  local hours=24 dropped_only=false

  while [[ $# -gt 0 ]]; do
    case "$1" in
      --peer)    filter_peer="$2";    shift 2 ;;
      --service) filter_service="$2"; shift 2 ;;
      --ip)      filter_ip="$2";      shift 2 ;;
      --type)    filter_type="$2";    shift 2 ;;
      --hours)   hours="$2";          shift 2 ;;
      --dropped) dropped_only=true;   shift   ;;
      --help)    cmd::activity::help; return  ;;
      *)
        log::error "Unknown flag: $1"
        cmd::activity::help
        return 1
        ;;
    esac
  done

  # Resolve peer name if type provided
  if [[ -n "$filter_peer" && -n "$filter_type" ]]; then
    filter_peer=$(peers::resolve_and_require "$filter_peer" "$filter_type") || return 1
  fi

  # Resolve --service to IP
  local service_ip=""
  if [[ -n "$filter_service" ]]; then
    service_ip=$(net::resolve "$filter_service" 2>/dev/null | head -1 | cut -d: -f1) || true
    if [[ -z "$service_ip" ]]; then
      log::error "Service not found: ${filter_service}"
      return 1
    fi
  fi
  [[ -n "$filter_ip" ]] && service_ip="$filter_ip"

  # Fetch aggregated data
  local data
  data=$(json::activity_aggregate \
    "$(ctx::fw_events_log)" \
    "$(ctx::events_log)" \
    "$(config::interface)" \
    "$(ctx::net)" \
    "$(ctx::clients)" \
    "$(ctx::meta)" \
    "$hours" \
    "$filter_peer" \
    "$service_ip" 2>/dev/null)

  if [[ -z "$data" ]]; then
    log::wg_warning "No activity data found"
    return 0
  fi

  # Measure w_peer and w_drops from data
  local w_peer=16 w_drops=1
  while IFS='|' read -r type rest; do
    case "$type" in
      peer)
        local name drops
        name=$(echo "$rest"  | cut -d'|' -f1)
        drops=$(echo "$rest" | cut -d'|' -f4)
        (( ${#name}  > w_peer  )) && w_peer=${#name}
function cmd::group::show() {
  local name=""

  while [[ $# -gt 0 ]]; do
    case "$1" in
      --name) util::require_flag "--name" "${2:-}" || return 1; name="$2"; shift 2 ;;
      --help) cmd::group::help; return ;;
      *) log::error "Unknown flag: $1"; return 1 ;;
    esac
  done

  [[ -z "$name" ]] && log::error "Missing required flag: --name" && return 1
  group::require_exists "$name" || return 1

  local group_file
  group_file="$(group::path "$name")"

  log::section "Group: ${name}"
  printf "\n"

  local desc
  desc=$(json::get "$group_file" "desc")
  ui::row "Description" "${desc:-—}"

  local peers_list=()
  mapfile -t peers_list < <(json::get "$group_file" "peers") || true
  local filtered=()
  for p in "${peers_list[@]:-}"; do
    [[ -n "$p" ]] && filtered+=("$p")
  done
  peers_list=("${filtered[@]:-}")
  local peer_count=${#peers_list[@]}
  [[ -z "${peers_list[0]:-}" ]] && peer_count=0

  local peer_word="peers"
  [[ "$peer_count" -eq 1 ]] && peer_word="peer"
  local valid_count=0
  for p in "${peers_list[@]}"; do
    [[ -z "$p" ]] && continue
    peers::require_exists "$p" > /dev/null 2>&1 && (( valid_count++ )) || true
  done
  local peer_word="peers"
  [[ "$valid_count" -eq 1 ]] && peer_word="peer"
  ui::row "Peers" "${valid_count} ${peer_word}"
  printf "\n"

  if [[ "$peer_count" -gt 0 ]]; then
    # Measure name and IP widths
    local w_name=16 w_ip=13
    for peer_name in "${peers_list[@]}"; do
      [[ -z "$peer_name" ]] && continue
      (( ${#peer_name} > w_name )) && w_name=${#peer_name}
    done
    (( w_name += 2 ))

    for peer_name in "${peers_list[@]}"; do
      [[ -z "$peer_name" ]] && continue

      if ! peers::require_exists "$peer_name" > /dev/null 2>&1; then
        printf "  \033[2m%-${w_name}s  (no longer exists)\033[0m\n" "$peer_name"
        continue
      fi

      local ip rule is_blocked
      ip=$(peers::get_ip "$peer_name")
      rule=$(peers::get_meta "$peer_name" "rule")
      peers::is_blocked "$peer_name" 2>/dev/null && is_blocked="true" || is_blocked="false"

      ui::group::show_member_row "$peer_name" "$ip" "${rule:--}" \
        "$is_blocked" "$w_name" "$w_ip"
    done
  else
    printf "  \033[2m—\033[0m\n"
  fi

  printf "\n"
}