#!/usr/bin/env bash
# infra/cluster.sh — manage the local dev k3s cluster (VMs + kubeconfig). Convenience for
# resuming Phase 1 development. Uses host virsh + kubectl (see infra/PHASE1-STATUS.md).
set -euo pipefail
export LIBVIRT_DEFAULT_URI=qemu:///system
HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
KCFG="${HERE}/ansible/.cache/dev.kubeconfig"
NODES=(k3s-dev-1 k3s-dev-2 k3s-dev-3)

case "${1:-status}" in
  status)
    virsh list --all | grep -E 'k3s-dev|Name|--' || true
    if [ -f "$KCFG" ]; then KUBECONFIG="$KCFG" kubectl get nodes 2>/dev/null || echo "(cluster not reachable — VMs stopped? run: $0 start)"; fi
    ;;
  start)   for n in "${NODES[@]}"; do virsh start "$n" 2>/dev/null || echo "$n already running"; done ;;
  stop)    for n in "${NODES[@]}"; do virsh shutdown "$n" 2>/dev/null || true; done; echo "graceful shutdown sent (state persists on disk; '$0 start' to resume)" ;;
  kubeconfig) echo "export KUBECONFIG=${KCFG}" ;;
  *) echo "usage: $0 {status|start|stop|kubeconfig}"; exit 2 ;;
esac