function _kctxns() {
    local conf="${KUBECONFIG:-"$HOME/.kube/config"}"
    local tmp cache file="$1" func="$2"; shift 2

    mapfile -t cache < "$file"
    if [ "$conf" -nt "$file" ]; then
        tmp="$(_"$func"_get)"
        if [ "$tmp" != "${cache[0]}" ]; then
            cache[1]="${cache[0]}"
        fi
        cache[0]="$tmp"
        echo -e "${cache[0]}\n${cache[1]}" > "$file"
    fi
    if [ -z "$1" ]; then
        echo "${cache[0]}"
        return
    fi
    if [ "$1" == - ]; then
        set -- "${cache[1]}" "${cache[0]}"
    else
        if [ "$1" == "${cache[0]}" ]; then
            return
        fi
        set -- "$1" "${cache[0]}"
    fi
    _"$func"_set "$1" || return
    echo -e "$1\n$2" > "$file"
}

function _kns_get() {
    kubectl config view --minify -ojsonpath='{..namespace}'
}
function _kns_set() {
    if ! kubectl get namespace -oname | grep -q "^namespace/$1\$"; then
        echo "error: no namespace exists with the name: \"$1\"" >&2
        return 1
    fi
    kubectl config set-context --current --namespace "$1" > /dev/null
    echo "Switched to namespace \"$1\"."
}
function kns() {
    local dir="$XDG_CACHE_HOME/kns"

    mkdir -p "$dir" > /dev/null
    _kctxns "$dir/$(kctx)" kns "$@"
}

function _kctx_get() { kubectl config current-context ; }
function _kctx_set() { kubectl config use-context "$1" ; }
# shellcheck disable=SC2120
function kctx() { _kctxns "$XDG_CACHE_HOME/kctx" kctx "$@" ; }

alias kga='kubectl get "$(kubectl api-resources --verbs=list --namespaced -oname | grep -v event | paste -sd,)"' \
      kgaoname='kubectl get "$(kubectl api-resources --verbs=list --namespaced -oname | grep -v event | paste -sd,)" -oname' \
      kgaowide='kubectl get "$(kubectl api-resources --verbs=list --namespaced -oname | grep -v event | paste -sd,)" -owide' \
      kgaoyaml='kubectl get "$(kubectl api-resources --verbs=list --namespaced -oname | grep -v event | paste -sd,)" -oyaml'

. /usr/share/bash-completion/completions/kubectl
compalias k=kubectl \
          ka='kubectl apply --recursive -f' \
          kd='kubectl describe' \
          kex='kubectl exec -i -t' \
          kg='kubectl get' \
          kgno='kubectl get node' \
          klo='kubectl logs -f' \
          kpf='kubectl port-forward' \
          krm='kubectl delete' \

function _k8salias() {
    local n s a

    for a in '' "${@/=/= }"; do
        s="${a%%=*}" n="${a#*=}"
        compalias "kd${s}=kubectl describe$n" \
                  "kg${s}=kubectl get$n" \
                  "kg${s}alloname=kubectl get --all-namespaces -oname$n" \
                  "kg${s}allowide=kubectl get --all-namespaces -owide$n" \
                  "kg${s}alloyaml=kubectl get --all-namespaces -oyaml$n" \
                  "kg${s}oname=kubectl get -oname$n" \
                  "kg${s}oname=kubectl get -oname$n" \
                  "kg${s}owide=kubectl get -owide$n" \
                  "kg${s}owide=kubectl get -owide$n" \
                  "kg${s}oyaml=kubectl get -oyaml$n" \
                  "kg${s}oyaml=kubectl get -oyaml$n" \
                  "krm${s}=kubectl delete$n"
    done
}
_k8salias cj=cronjob \
          cm=configmap \
          dep=deployment \
          ing=ingress \
          j=job \
          ns=namespace \
          po=pod \
          pvc=persistentvolumeclaim \
          pv=persistentvolume \
          sec=secret \
          sts=statefulset \
          svc=service
unset -f _k8salias