#!/usr/bin/env bash
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
KUBECONFIG_PATH="$REPO_ROOT/outputs/kubeconfig"
SSH_KEY="${SSH_KEY:-$HOME/.ssh/infra}"

CP1_PUBLIC_IP="${1:-}"

if [ -z "$CP1_PUBLIC_IP" ]; then
    if [ -f "$REPO_ROOT/ansible/inventory.ini" ]; then
        CP1_PUBLIC_IP=$(grep -A2 '\[control_plane\]' "$REPO_ROOT/ansible/inventory.ini" | grep -oP '\d+\.\d+\.\d+\.\d+' | head -1)
    fi
fi

if [ -z "$CP1_PUBLIC_IP" ]; then
    echo "Usage: $0 <control-plane-1-public-ip>"
    echo "   Or ensure ansible/inventory.ini exists with control plane IPs."
    exit 1
fi

echo "Fetching kubeconfig from $CP1_PUBLIC_IP ..."
ssh -i "$SSH_KEY" \
    -o StrictHostKeyChecking=no \
    -o UserKnownHostsFile=/dev/null \
    "root@$CP1_PUBLIC_IP" "cat /etc/rancher/k3s/k3s.yaml" \
    | sed "s/127.0.0.1/$CP1_PUBLIC_IP/g" \
    > "$KUBECONFIG_PATH"

chmod 600 "$KUBECONFIG_PATH"
echo "Kubeconfig saved to $KUBECONFIG_PATH"
echo "Run: export KUBECONFIG=$KUBECONFIG_PATH"