#!/usr/bin/bash
#
# k8s/wipe.sh — remove existing k3s from all cnodes
#
# The current install on cnode1/2 uses LAN IP (192.168.3.x). We need to
# rebuild with Tailscale IPs. This cluster has only system pods (16h old,
# no user workloads), so a clean wipe is safe.
#
set -uo pipefail
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
# shellcheck source=./env.sh
source "$SCRIPT_DIR/env.sh"

echo "============================================"
echo "  Wiping existing k3s from all cnodes"
echo "============================================"

for ip in "${ALL_CNODES[@]}"; do
  echo ""
  echo "--- $ip ---"
  cn "$ip" '
    # Stop services first
    systemctl stop k3s 2>/dev/null || true
    systemctl stop k3s-agent 2>/dev/null || true

    # Server uninstall (also removes agents)
    if [ -x /usr/local/bin/k3s-uninstall.sh ]; then
      /usr/local/bin/k3s-uninstall.sh
    elif [ -x /usr/local/bin/k3s-agent-uninstall.sh ]; then
      /usr/local/bin/k3s-agent-uninstall.sh
    else
      echo "no k3s installed on this node"
    fi

    # Clean up residual state
    rm -rf /etc/rancher/k3s /var/lib/rancher/k3s /var/lib/kubelet /var/lib/cni
    rm -f /etc/systemd/system/k3s.service /etc/systemd/system/k3s-agent.service
    systemctl daemon-reload

    # Clean network interfaces left by k3s/flannel
    ip link delete cni0 2>/dev/null || true
    ip link delete flannel.1 2>/dev/null || true
    ip link delete kube-ipvs0 2>/dev/null || true

    echo "WIPE DONE"
  '
done

echo ""
echo "============================================"
echo "  Wipe complete. Ready for bootstrap."
echo "============================================"