<?php

namespace init_systems;

// Used by: RHEL, Fedora, Debian, Ubuntu, Arch, openSUSE

class systemd {
    
  private static function _doRoot(): string {
      $root = \neato::becomeRoot();
      if ($root === true) {
          return "";
      }
      if ($root === false) {
          throw new \Exception("Unable to su as root");
      }
      return $root . " ";
  }  

  private static function getValidActionForService(string $action): string|false {
     return match($action) {
         'start'=>'start',
         'stop'=>'stop',
         'status'=>'status',
         'restart'=>'restart',
         'reload'=>'reload',
         'enable'=>'enable',
         'disable'=>'disable',
         'mask'=>'mask', // disable
         'unmask'=>'unmask', // re-enable
         'reboot'=>'reboot',
         'poweroff'=>'poweroff',
         'list-units'=>'list-units',
         'list-unit-files'=>'list-unit-files',
         'isolate'=>'isolate', // Change system runlevel target
         'log'=>'journalctl -u', // View service log
         'realtime'=>'journalctl -f', // watch live logs
         default=>false,
     };
  } 
    
  private static function getValidActionForSystemCtl(string $action): string|false {
     return match($action) {
         'start'=>'start',
         'stop'=>'stop',
         'status'=>'status',
         'restart'=>'restart',
         'reload'=>'reload',
         'enable'=>'enable',
         'disable'=>'disable',
         default=>false,
     };
  } 

  public static function service(string $name, string $action = 'restart') {
    $my_action = self::getValidActionForService($action);
    exec(self::_doRoot() . \neato::get_super_user_bin . 'service ' . safeCmd($name, $my_action), $output, $exit_code);
    display($output);
    checkForError($exit_code, "Unable to {$action} Service called: {$name}");
    return $exit_code;
  }

  public static function systemctl(string $name, string $action = 'enable') {
    $my_action = self::getValidActionForSystemCtl($action);
    exec(self::_doRoot() . \neato::get_bin . 'systemctl ' . safeCmd($my_action, $name), $output, $exit_code);
    checkForError($exit_code, "Unable to {$action} Service called: {$name}");
    return $exit_code;
  }
    
}