<?php

namespace package_managers;

class snap {
    
  public static function is_installed(string $prog) {
    exec(\neato::get_user_bin . 'dpkg -s ' . safeCmd($prog) . ' | ' . \neato::get_bin . 'grep "install ok installed"', $out, $exit_code);
    exec(\neato::get_user_bin . 'dpkg -s ' . safeCmd($prog) . ' | ' . \neato::get_bin . 'grep ^Version', $output, $code);
    $version = str_replace('Version: ', '', $output[0]);
    return ($exit_code == 0) ? ['installed' => true, 'version' => $version] : ['installed' => false];
  }
    
  public static function upgrade() {
    return self::update();
  }

  public static function install(string $prog) {
    exec(\neato::get_user_bin . 'snap install -y ' . safeCmdQuotes($prog) . stdErr(), $output, $exit_code);
    display($output);
    checkForError($exit_code, "Unable to install: {$prog}");
    return $exit_code;
  }

  public static function purge(string $prog) {
      return self::uninstall($prog);
  }

  public static function uninstall(string $prog) {
    exec(\neato::get_user_bin . 'snap remove -y ' . safeCmdQuotes($prog) . stdErr(), $output, $exit_code);
    display($output);
    checkForError($exit_code, "Unable to uninstall: {$prog}");
    return $exit_code;
  }

  /**
   * @todo fix me
   */
  public static function add_repo(string $repo) {
      return false;
  }

  public static function update() {
    exec(\neato::get_user_bin . 'snap refresh' . stdErr(), $output, $exit_code);
    display($output);
    return $exit_code;
  }

  public static function full_update() {
      return false;
  }
  
  // Have a Backup!!
  public static function full_system_upgrade() {
      return false;
  } 
  
  public static function list() {
    exec(\neato::get_user_bin . 'snap list --upgradeable' . stdErr(), $output, $exit_code);
    display($output);
    return $exit_code;
  }
  
  /*
   * shows only the packages installed on the system.
   */
  public static function installed() {
    exec(\neato::get_user_bin . 'snap --installed' . stdErr(), $output, $exit_code);
    display($output);
    return $exit_code;
  }

  /*
   * View the list of mirrors by using the fetch command.
   */
  public static function info() {
    exec(\neato::get_user_bin . 'snap info --verbose' . stdErr(), $output, $exit_code);
    display($output);
    return $exit_code;
  }

  /*
   * Revert a Snap package to a previous version:
   */
  public static function revert() {
    exec(\neato::get_user_bin . 'snap revert' . stdErr(), $output, $exit_code);
    display($output);
    return $exit_code;
  }

}