{
  hostname,
  datadir ? null,
  dataBackupPath ? null,
  dbBackupPath ? null,
  https ? true,
}:
{
  config,
  pkgs,
  lib,
  ...
}:
let
  nextcloudPkg = pkgs.nextcloud31.overrideAttrs (oldAttr: rec {
    caBundle = config.security.pki.caBundle;
    postPatch = ''
      cp ${caBundle} resources/config/ca-bundle.crt
    '';
  });
in
{
  imports = [
    "${
      fetchTarball {
        url = "https://github.com/onny/nixos-nextcloud-testumgebung/archive/fa6f062830b4bc3cedb9694c1dbf01d5fdf775ac.tar.gz";
        sha256 = "0gzd0276b8da3ykapgqks2zhsqdv4jjvbv97dsxg0hgrhb74z0fs";
      }
    }/nextcloud-extras.nix"
  ];

  services.postgresql = {
    enable = true;
    ensureUsers = [
      {
        name = "nextcloud";
        ensureDBOwnership = true;
      }
    ];
    ensureDatabases = [
      "nextcloud"
    ];
  };

  services.nextcloud = {
    enable = true;
    package = nextcloudPkg;
    configureRedis = true;
    hostName = hostname;
    https = if https then true else false;
    datadir = lib.mkIf (datadir != null) datadir;
    phpExtraExtensions =
      all: with all; [
        imagick
      ];

    extraApps = {
      inherit (config.services.nextcloud.package.packages.apps)
        contacts
        calendar
        tasks
        ;

      camerarawpreviews = pkgs.fetchNextcloudApp {
        url = "https://github.com/ariselseng/camerarawpreviews/releases/download/v0.8.7/camerarawpreviews_nextcloud.tar.gz";
        sha256 = "sha256-aiMUSJQVbr3xlJkqOaE3cNhdZu3CnPEIWTNVOoG4HSo=";
        license = "agpl3Plus";
      };

      user_oidc = pkgs.fetchNextcloudApp {
        url = "https://github.com/nextcloud-releases/user_oidc/releases/download/v7.2.0/user_oidc-v7.2.0.tar.gz";
        sha256 = "sha256-nXDWfRP9n9eH+JGg1a++kD5uLMsXh5BHAaTAOgLI9W4=";
        license = "agpl3Plus";
      };
    };
    extraAppsEnable = true;

    database.createLocally = true;
    config = {
      adminpassFile = config.sops.secrets."nextcloud/adminPassword".path;
      dbtype = "pgsql";
    };

    settings = {
      allow_local_remote_servers = true;
      log_type = "syslog";
      enabledPreviewProviders = [
        "OC\\Preview\\BMP"
        "OC\\Preview\\GIF"
        "OC\\Preview\\JPEG"
        "OC\\Preview\\Krita"
        "OC\\Preview\\MarkDown"
        "OC\\Preview\\MP3"
        "OC\\Preview\\OpenDocument"
        "OC\\Preview\\PNG"
        "OC\\Preview\\TXT"
        "OC\\Preview\\XBitmap"
        "OC\\Preview\\HEIC"
        "OC\\Preview\\SVG"
        "OC\\Preview\\FONT"
      ];
    };
  };

  services.nginx.virtualHosts.${hostname} = {
    enableACME = true;
    forceSSL = true;
  };

  environment.systemPackages = with pkgs; [
    exiftool
  ];

  systemd = {
    timers = lib.mkIf (dataBackupPath != null || dbBackupPath != null) {
      "nextcloud-backup" = {
        enable = true;
        description = "Nextcloud backup";
        timerConfig = {
          OnCalendar = "*-*-* 03:00:00";
          Persistent = true;
          OnUnitActiveSec = "1d";
          AccuracySec = "1h";
          Unit = "nextcloud-backup.service";
        };
        wantedBy = [ "timers.target" ];
      };
    };

    services."nextcloud-backup" = lib.mkIf (dataBackupPath != null || dbBackupPath != null) {
      enable = true;
      serviceConfig = {
        User = "nextcloud";
        ExecStart =
          let
            script = pkgs.writeShellScriptBin "backup" (
              ''
                nextcloudPath="${config.services.nextcloud.datadir}"

                if [ ! -d "$nextcloudPath" ]; then
                  echo "nextcloud path not found: $nextcloudPath"
                  exit 1
                fi
              ''
              + (
                if dataBackupPath != null then
                  ''
                    backupPath="${dataBackupPath}"
                    nextcloudBakPath="$backupPath"

                    if [ ! -d "$backupPath" ]; then
                      echo "Backup device is not mounted: $backupPath"
                      exit 1
                    fi

                    echo "Start syncing..."
                    ${pkgs.rsync}/bin/rsync -rh --delete "$nextcloudPath" "$nextcloudBakPath"
                    echo "Data dir backup completed."
                  ''
                else
                  ""
              )
              + (
                if dbBackupPath != null then
                  ''
                    nextcloudDBBakPath="${dbBackupPath}/nextcloud-db.bak.tar"
                    if [ ! -d "$nextcloudBakPath" ]; then
                      mkdir -p "$nextcloudBakPath"
                    fi

                    echo "Try backing up database (postgresql)"
                    ${pkgs.postgresql}/bin/pg_dump -F t nextcloud -f "$nextcloudDBBakPath"
                    echo "Database backup completed."
                  ''
                else
                  ""
              )
            );
          in
          "${script}/bin/backup";
      };
    };
  };
}