#!/bin/bash
# Shared helpers for install-fleet_daemon.sh. Sourced, never executed.

_resolve_kubeconfig() {
  if [ -n "${KUBECONFIG:-}" ] && [ -f "$KUBECONFIG" ]; then
    return
  fi
  for candidate in \
    /var/lib/k0s/pki/admin.conf \
    /etc/kubernetes/admin.conf \
    /root/.kube/config; do
    if [ -f "$candidate" ]; then
      export KUBECONFIG="$candidate"
      return
    fi
  done
  if command -v k0s >/dev/null 2>&1; then
    local tmp
    tmp="$(mktemp)"
    if k0s kubeconfig admin > "$tmp" 2>/dev/null; then
      export KUBECONFIG="$tmp"
      return
    fi
    rm -f "$tmp"
  fi
  echo "ERROR: kubeconfig not found — set KUBECONFIG explicitly" >&2
  exit 1
}

_kubectl() {
  if command -v kubectl >/dev/null 2>&1; then
    command kubectl "$@"
  elif command -v k0s >/dev/null 2>&1; then
    k0s kubectl "$@"
  else
    echo "ERROR: neither kubectl nor k0s found on PATH" >&2
    exit 127
  fi
}

_require_env() {
  local var="$1"
  if [ -z "${!var:-}" ]; then
    echo "ERROR: required variable $var is not set" >&2
    exit 1
  fi
}

_namespace_exists() {
  _kubectl get namespace "$FLEET_DAEMON_NAMESPACE" >/dev/null 2>&1
}

_deployment_exists() {
  _kubectl get deployment "$FLEET_DAEMON_NAME" --namespace "$FLEET_DAEMON_NAMESPACE" >/dev/null 2>&1
}

_wait_for_deployment() {
  local timeout="${1:-180}"
  if command -v _diag_wait_for_deployment >/dev/null 2>&1; then
    _diag_wait_for_deployment "$FLEET_DAEMON_NAME" "$FLEET_DAEMON_NAMESPACE" "$timeout"
  else
    _kubectl rollout status deployment/"$FLEET_DAEMON_NAME" \
      --namespace "$FLEET_DAEMON_NAMESPACE" \
      --timeout="${timeout}s"
  fi
}

_crd_present() {
  _kubectl get crd "$1" >/dev/null 2>&1
}

_cidrs_yaml_array() {
  # Convert a space-separated CIDR list into yaml indented `from:` entries.
  # $1 = indent prefix (e.g. "        "), $2 = space-separated CIDRs
  local prefix="$1"
  shift
  local out=""
  for c in "$@"; do
    out="${out}${prefix}- ipBlock:\n${prefix}    cidr: ${c}\n"
  done
  printf '%b' "$out"
}