<?php

namespace package_managers;

class nala {
    
  public static function is_installed(string $prog) {
    exec(\neato::get_user_bin . 'dpkg -s ' . safe_cmd($prog) . ' | ' . \neato::get_bin . 'grep "install ok installed"', $out, $exit_code);
    exec(\neato::get_user_bin . 'dpkg -s ' . safe_cmd($prog) . ' | ' . \neato::get_bin . 'grep ^Version', $output, $code);
    $get_version = $output[0] ?? false;
    if ($get_version === false) {
        return ['installed' => false];
    }
    $version = str_replace('Version: ', '', $get_version);
    return ($exit_code == 0) ? ['installed' => true, 'version' => $version] : ['installed' => false];
  }
    
  public static function upgrade(string $prog) {
    exec(\neato::get_user_bin . 'nala upgrade ' . safe_cmd_quotes($prog) . stderr(), $output, $exit_code);
    display($output);
    check_for_error($exit_code, "Unable to upgrade: {$prog}");
    return $exit_code;
  }

  public static function install(string $prog, bool $auto=true) {
    $assume = ($auto) ? "--assume-yes " : "";
    exec(\neato::get_user_bin . 'nala install ' . $assume . safe_cmd_quotes($prog) . stderr(), $output, $exit_code);
    display($output);
    check_for_error($exit_code, "Unable to install: {$prog}");
    return $exit_code;
  }

  public static function purge(string $prog, bool $auto=true) {
    $assume = ($auto) ? "--assume-yes " : "";
    exec(\neato::get_user_bin . 'nala purge ' . $assume . safe_cmd_quotes($prog) . stderr(), $output, $exit_code);
    display($output);
    check_for_error($exit_code, "Unable to uninstall: {$prog}");
    return $exit_code;
  }

  public static function uninstall(string $prog, bool $auto=true) {
    $assume = ($auto) ? "--assume-yes " : "";
    exec(\neato::get_user_bin . 'nala remove ' . $assume . safe_cmd_quotes($prog) . stderr(), $output, $exit_code);
    display($output);
    check_for_error($exit_code, "Unable to uninstall: {$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 . 'nala update' . stderr(), $output, $exit_code);
    display($output);
    return $exit_code;
  }

  public static function full_update() {
    exec(\neato::get_user_bin . 'nala update && ' .  \neato::get_user_bin . 'nala autoremove && ' . \neato::get_user_bin . 'nala clean' . stderr(), $output, $exit_code);
    display($output);
    return $exit_code;
  }
  
  public static function full_system_upgrade() {
      return false;
  } 
  
  public static function list() {
    exec(\neato::get_user_bin . 'nala 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 . 'nala list --installed' . stderr(), $output, $exit_code);
    display($output);
    return $exit_code;
  }

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

  /*
   * Delete the local cache files with the clean command.
   */
  public static function clean() {
    exec(\neato::get_user_bin . 'nala clean' . stderr(), $output, $exit_code);
    display($output);
    return $exit_code;
  }

}