/**
 * `celilo proxmox node list` — live per-node capacity from the Proxmox cluster
 * (ISS-0060, Phase 1 of openspec/changes/proxmox-capacity-lifecycle/proposal.md).
 *
 * Reads reality from the Proxmox API via `ProxmoxClient`, never a cached DB
 * value — the foundation for capacity-aware placement (ISS-0061) and
 * reconcile-on-read (the rest of ISS-0060 / ISS-0090).
 */

import { ProxmoxClient, type ProxmoxCredentials } from '../../api-clients/proxmox';
import { getServiceCredentials, listContainerServices } from '../../services/container-service';
import { celiloIntro } from '../prompts';
import type { CommandResult } from '../types';
import { resolveProxmoxService } from './proxmox-service';

function formatUptime(sec: number): string {
  if (sec <= 0) return '—';
  const days = Math.floor(sec / 86400);
  const hours = Math.floor((sec % 86400) / 3600);
  return days > 0 ? `${days}d${hours}h` : `${hours}h`;
}

export async function handleProxmoxNodeList(
  args: string[],
  _flags: Record<string, boolean | string> = {},
): Promise<CommandResult> {
  celiloIntro('Proxmox nodes');

  const resolved = resolveProxmoxService(await listContainerServices(), args[0]);
  if ('error' in resolved) {
    console.log(`✗ ${resolved.error}`);
    return { success: false, error: resolved.error };
  }
  const { service } = resolved;

  const creds = (await getServiceCredentials(service.id)) as ProxmoxCredentials;
  const result = await new ProxmoxClient(creds).nodeCapacities();
  if (!result.success) {
    console.log(`✗ Could not reach Proxmox (${service.serviceId}): ${result.message}`);
    return { success: false, error: result.message };
  }

  if (result.data.length === 0) {
    console.log('No nodes reported by the cluster.');
    return { success: true, message: 'No nodes' };
  }

  console.log(`Service: ${service.serviceId} (${service.name})\n`);
  console.log(
    'NODE        STATUS    RAM free/total      CPU             DISK free/total     UPTIME',
  );
  console.log(
    '─────────────────────────────────────────────────────────────────────────────────────',
  );
  for (const n of result.data) {
    const status = n.online ? 'online' : 'OFFLINE';
    const ram = `${(n.memFreeMb / 1024).toFixed(1)}/${(n.memTotalMb / 1024).toFixed(1)} GB`;
    const cpu = `${n.cpuCores} cores ${n.cpuUsedPct}%`;
    const disk = `${n.diskFreeGb}/${n.diskTotalGb} GB`;
    console.log(
      `${n.node.padEnd(11)} ${status.padEnd(9)} ${ram.padEnd(19)} ${cpu.padEnd(15)} ${disk.padEnd(19)} ${formatUptime(
        n.uptimeSec,
      )}`,
    );
  }
  console.log('');
  return { success: true, message: `${result.data.length} node(s)` };
}