{ ... }:
{
  programs.zsh = {
    enable = true;
    enableCompletion = true;
    history.size = 10000;

    autosuggestion = {
      enable = true;
      highlight = "fg=10";
    };

    syntaxHighlighting = {
      enable = true;
    };

    initExtra = ''
      if [ -f $HOME/.nix-profile/etc/profile.d/nix.sh ];
      then 
        source $HOME/.nix-profile/etc/profile.d/nix.sh 
      fi

      function sc-log {
        ssh smartcan "SYSTEMD_COLORS=true journalctl --follow --no-tail --unit smartcan-''${1:-*}"
      }

      function sc-restart {
        ssh smartcan "systemctl restart smartcan-''${1}"
      }

      function fu-reboot {
        ssh fusion "reboot"
      }

      function fu-flash {
        local ssh_login="fusion"
        local update_file=''${1}

        if [ -z ''${update_file} ]; then
            update_file=$(find build/tmp/deploy/images -name "*.swu" -type f | fzf --select-1)
        fi 

        if [ -z ''${update_file} ]; then
            echo "no file selected" 
            return 1 
        fi

        if [ ! -f ''${update_file} ]; then
            echo "file \"''${update_file}\" does not exist" 
            return 2 
        fi

        echo "flashing ''${update_file} to device..."
        cat "''${update_file}" | ssh ''${ssh_login} "swupdate-client -"

        if [ $? -ne 0 ]; then
            echo "update failed"
            return 3
        fi

        echo "rebooting device"
        ssh ''${ssh_login} reboot

        echo "done."
      }
    '';
  };
}