#!/bin/bash
: '
 @vendor    Chorke Academia, Inc.
 @web       https://cdn.chorke.org/docs/academia
 @version   1.0.00
 @since     1.0.00
'

:<<EXE
if [[ -x "$(command -v curl)" ]]&&[[ -x "$(command -v minikube)" ]]&&[[ -x "$(command -v jq)" ]];then \
  bash <(curl -s 'https://cdn.chorke.org/exec/cli/bash/install/minikube/network/ifupdown/1.0.0-ubuntu-22.04.sh.txt');\
else printf 'curl|minikube|jq \033[0;31mnot found! \033[0m:(\n';fi
EXE


:<<BUG
echo 'export IFACE=lo;export MODE=stop; /etc/network/if-post-down.d/minikube-ifupdown'|sudo su 
echo 'export IFACE=lo;export MODE=start;/etc/network/if-up.d/minikube-ifupdown'|sudo su 
   ls -lah /etc/network/if-{up,post-down}.d/minikube-ifupdown
sudo rm -f /etc/network/if-{up,post-down}.d/minikube-ifupdown
BUG


cat << EXE | sudo tee /etc/network/if-{up,post-down}.d/minikube-ifupdown >/dev/null
#!/bin/bash
: '
 @vendor    Chorke Academia, Inc.
 @web       https://cdn.chorke.org/docs/academia
 @version   1.0.00
 @since     1.0.00
'

USER_TARGET="minikube"

function silent_exit(){
  exit 0
}

function verify_addr(){
  printf -v DNS_HOST '%s' \$(sudo -u \${USER_TARGET} minikube ip)
  if [[ "\${DNS_HOST}" =~ ^(([1-9]?[0-9]|1[0-9][0-9]|2([0-4][0-9]|5[0-5]))\.){3}([1-9]?[0-9]|1[0-9][0-9]|2([0-4][0-9]|5[0-5]))$ ]]; then
    if [[ "\${DNS_HOST}" == '127.0.0.1' ]]; then silent_exit; fi
  else silent_exit; fi
}

function verify_kube(){
  printf -v K8S_JSON '%s' \$(sudo -u \${USER_TARGET} minikube status -o 'json')
  printf -v K8S_REST '%s' \$(echo \${K8S_JSON} | jq -r '.APIServer')
  printf -v K8S_KUBE '%s' \$(echo \${K8S_JSON} | jq -r '.Kubelet')
  printf -v K8S_HOST '%s' \$(echo \${K8S_JSON} | jq -r '.Host')

  if [[ "\${K8S_HOST}" == 'Running' ]]&&
     [[ "\${K8S_KUBE}" == 'Running' ]]&&
     [[ "\${K8S_REST}" == 'Running' ]]; then verify_addr
  else silent_exit; fi
}

function verify_tool(){
  if [[ -x "\$(command -v jq)" ]]; then verify_kube; else silent_exit; fi
}

function verify_mini(){
  if [[ -x "\$(command -v minikube)" ]]; then verify_tool; else silent_exit; fi
}

function verify_link(){
  HOST_ETHERS="\$(ip -j link show | jq -r '.[].ifname'| paste -sd' ' -)"
  if [[ "\${HOST_ETHERS}" =~ "\${IFACE}" ]]; then verify_mini; else silent_exit; fi
}

function verify_mode(){
  if [[ "\${MODE}" == 'start' ]]; then verify_link; else verify_mini; fi
}

function verify(){
  verify_mode
}

function amend_nameserver(){
  RESOLV_CONF='/etc/resolv.conf'
  if  [[ -f \${RESOLV_CONF} ]]&&[[ "\$(grep -c \${DNS_HOST} \${RESOLV_CONF})" == 0 ]];then
    cat << CON | sudo tee -a \${RESOLV_CONF} >/dev/null

# minikube dns server
nameserver \${DNS_HOST}
CON
  else silent_exit; fi
}

function handle(){
  amend_nameserver
}

function init(){
  verify
  handle
}

init
EXE
sudo chmod +x /etc/network/if-{up,post-down}.d/minikube-ifupdown