#!/bin/sh

set -e

# VARIABLES
# Relative PATH to the workdir from the script directory
WORK_DIR_RELPATH="../vcluster"

# Compute WORKDIR
SCRIPT="$(readlink -f "$0")"
SCRIPT_DIR="$(dirname "$SCRIPT")"
WORK_DIR="$(readlink -f "$SCRIPT_DIR/$WORK_DIR_RELPATH")"

# Update the PATH to add the arkade bin directory
# Add the arkade binary directory to the path if missing
case ":${PATH}:" in
  *:"${HOME}/.arkade/bin":*) ;;
  *) export PATH="${PATH}:${HOME}/.arkade/bin" ;;
esac

# Go to the working directory
cd "$WORK_DIR" || exit 1

echo "=> Creating or updating the vcluster"
vcluster create my-vcluster --namespace my-vcluster --upgrade --connect=false \
  --values vcluster.yaml

echo "=> Adding a traefik ingress route tcp to the vcluster api"
kubectl apply -f ingress_route_tcp.yaml

echo "=> Exporting vcluster kubeconfig"
tries="0"
while true; do
  if kubectl get -n my-vcluster secret/my-vcluster-kubeconfig >/dev/null 2>&1; then
    # Dump the kubeconfig if available
    kubectl get -n my-vcluster secret/my-vcluster-kubeconfig \
      --template="{{.data.config}}" | base64 -d > ~/.kube/my-vcluster-config
    echo "KubeConfig dumped to '~/.kube/my-vcluster-config'"
    break
  fi
  tries="$((tries + 1))"
  echo "KubeConfig not avaliable after attempt '$tries'"
  if [ "$tries" -lt "10" ]; then
    sleep 5
  else
    break
  fi
done

if [ "$tries" -eq "10" ]; then
  echo "=> Failed to get the vcluster kubeconfig, try again"
  exit 1
fi

cat <<EOF
=> NOTE
Overwrite the KUBECONFIG variable to access the vcluster with 'kubectl':

  KUBECONFIG=~/.kube/my-vcluster-config kubectl

You can define the following 'vkubectl' alias to make it easier:

  alias vkubectl="KUBECONFIG=~/.kube/my-vcluster-config kubectl"

Or you can merge it with the one on the KUBECONFIG variable and use 'kubectx' or
a similar tool to change the context (for our vcluster the context will be
'my-vcluster_k3d-argocd').

If your KUBECONFIG variable is defined and only has the path to a single file
you can merge it with the vcluster config running the following:

  KUBECONFIG="\$KUBECONFIG:~/.kube/my-vcluster-config" \\
    kubectl config view --flatten > "\$KUBECONFIG.new";
  mv "\$KUBECONFIG.new" "\$KUBECONFIG"
EOF