#!/usr/bin/env bash
# Read-only: Proxmox host load vs logical CPUs + count of Besu-named LXCs per node.
# Rule of thumb for "under 50% capacity": load average (1 min) / nproc < 0.5.
#
# Env: PROXMOX_BESU_LOAD_HOSTS — space-separated host IPs (default: ml110 + r630-01..04)
#
# Usage: bash scripts/verify/report-besu-host-cpu-load.sh

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
# shellcheck source=/dev/null
source "${PROJECT_ROOT}/config/ip-addresses.conf" 2>/dev/null || true

H="${PROXMOX_BESU_LOAD_HOSTS:-${PROXMOX_HOST_ML110:-192.168.11.10} ${PROXMOX_HOST_R630_01:-192.168.11.11} ${PROXMOX_HOST_R630_02:-192.168.11.12} ${PROXMOX_HOST_R630_03:-192.168.11.13} ${PROXMOX_HOST_R630_04:-192.168.11.14}}"
SSH_OPTS=(-o ConnectTimeout=10 -o BatchMode=yes -o StrictHostKeyChecking=no)

echo "Besu-related host load (1m_load / nproc — target < 0.50)"
echo "-------------------------------------------------------------------"

for ip in $H; do
  line=$(ssh "${SSH_OPTS[@]}" "root@${ip}" "printf '%s|%s|%s|%s\n' \"\$(hostname 2>/dev/null)\" \"\$(nproc 2>/dev/null)\" \"\$(cut -f1 -d' ' /proc/loadavg 2>/dev/null)\" \"\$(pct list 2>/dev/null | grep -ci besu || echo 0)\"" 2>/dev/null) || line=""
  if [[ -z "$line" ]]; then
    printf "%-16s UNREACHABLE\n" "$ip"
    continue
  fi
  IFS='|' read -r hn np l1 nb <<<"$line"
  np="${np:-1}"
  l1="${l1:-0}"
  ratio=$(awk -v L="$l1" -v N="$np" 'BEGIN { if (N+0>0) printf "%.2f", L/N; else print "?" }')
  flag="warn"
  awk -v r="$ratio" 'BEGIN{exit !(r+0<0.5)}' 2>/dev/null && flag="ok" || true
  printf "%-15s %-28s nproc=%-2s 1m=%-8s ratio=%-5s besu_cts=%-3s %s\n" "$ip" "$hn" "$np" "$l1" "$ratio" "$nb" "$flag"
done