#!/usr/bin/env bash

source .utils

DEBUG=""

print_usage() {
  orange "gs-login - login to Giant Swarm managed clusters"
  echo " "
  underline "Usage:"
  echo "gs-login [INSTALLATION] [WORKLOAD CLUSTER] [ORGANISATION]"
  echo " "
  underline "Examples:"
  echo "> gs-login gauss"
  echo "> gs-login gauss mywc1"
  echo " "
  underline "Options:"
  echo "-h, --help                show this help text"
}

POS_ARGS=()

while test $# -gt 0; do
  case "$1" in
    -t|--ttl)
      shift
      echo "-t / --ttl no longer handled"
      shift
      ;;
    -g|--certificate-group)
      shift
      echo "-g / --certificate-group no longer handled"
      shift
      ;;
    -h|--help)
      print_usage
      exit 0
      ;;
    --debug)
      DEBUG="--level=debug"
      shift
      ;;
    /)
      # We want to ignore slash seperators between MC and WC
      shift
      ;;
    *)
      POS_ARGS+=(`echo $1 | tr '/' ' '`)
      shift
      ;;
  esac
done

if [ ${#POS_ARGS[@]} -eq 0 ]; then
  POS_ARGS+=(`opsctl list installations --short | tr ' ' '\n' | fzf`)
fi

case ${#POS_ARGS[@]} in
  0)
    print_usage
    exit 1
    ;;
  *)
    kubectl config delete-context gs-${POS_ARGS[0]} &>/dev/null

    TELEPORT_CLUSTER_NAME="$(echo "${POS_ARGS[@]}" | tr ' ' '-')"
    TELEPORT_SUPPORTED=$(tsh kube ls -f json --query "name == \"${TELEPORT_CLUSTER_NAME}\"" 2>/dev/null | jq '. | length')
    if [[ "${TELEPORT_SUPPORTED}" == "0" ]]; then
      # Teleport not supported, old style login
      echo "Cluster isn't know to Teleport, using old login method"
      opsctl login ${DEBUG} ${POS_ARGS[@]}
    else
      echo "Logging in with Teleport. Cluster: '${TELEPORT_CLUSTER_NAME}'"
      # Make sure that caching is disabled to avoid issues with cross-cluster cache pollution
      TELEPORT_CACHE_DIR="${HOME}/.kube/cache/discovery/teleport.giantswarm.io_443"
      if [[ "$(readlink -f ${TELEPORT_CACHE_DIR})" != "/dev/null" ]]; then
        rm -rf ${TELEPORT_CACHE_DIR}
        ln -s /dev/null ${TELEPORT_CACHE_DIR}
      fi
      tsh kube login ${TELEPORT_CLUSTER_NAME}
    fi
    ;;
esac