{
  config,
  lib,
  username,
  ...
}:
let
  cfg = config.os.core.ssh;
  keys = {
    main = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIC610CJfgc3yII7MpLVqzEzQGa8Tsm+dih+CTXHXTnv4";
    oci = "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCgWmRbNTP/kcaZ8JNV1boVTZ/FQVV4qP/9eTKL9buzDvz9HJdgyWmbCiVZicNSert31IRdWOF/wm1sFjZ48nSkGDHbrnc//MPSdHULTx+kMES/NW9SZwwpaquFIJClrObysxrFYBAqweD+DJ3bp451WIymBs7lRBMNKPgoHBpJ5WN2CfIQjl60Jqnli7ML5seCsrquPEemcMPr1TFPmrFCbirzgDVkzCLL5kOowSD2uprtSA08fFm/pZ6nZh6KTQaEgPO4zR9tK+NQ46oCynWwBTI7JOPB4/LtIOiC5TjEUrkXZ/sJzpCBiNPYSRI8RWnAD0N/uVFJ4EYPUKLO2C/d";
  };
in
{
  options.os.core.ssh.enable = lib.mkEnableOption "enables ssh server setup";

  config = lib.mkIf cfg.enable {
    services.openssh = {
      enable = true;
      settings = {
        PasswordAuthentication = false;
        KbdInteractiveAuthentication = false;
      };
    };

    programs.ssh.startAgent = true;
    services.gnome.gcr-ssh-agent.enable = false;

    users.users.${username}.openssh.authorizedKeys.keys = [ "${keys.main} adikro@disroot.org" ];

    environment.etc."ssh/allowed_signers".text = "adikro@disroot.org ${keys.main}";
    home-manager.users.${username} = {
      programs.ssh = {
        enable = true;
        enableDefaultConfig = false;

        matchBlocks = {
          "github.com codeberg.org" = {
            identityFile = "~/.ssh/main_id_ed25519.pub";
            identitiesOnly = true;
            user = "git";
          };
          "oci" = {
            hostname = "130.162.223.123";
            user = "opc";
          };
        };
      };
      home.file = {
        ".ssh/main_id_ed25519.pub".text = keys.main;
        ".ssh/oci.pub".text = keys.oci;
      };
    };
  };
}