{
  config,
  pkgs,
  flake,
  ...
}: {
  age.secrets."nextcloud-secrets" = {
    file = "${flake.self}/secrets/nextcloud-secrets.age";
    mode = "400";
    owner = "nextcloud";
  };

  age.secrets."nextcloud-admin-pass" = {
    file = "${flake.self}/secrets/nextcloud-admin-pass.age";
    mode = "400";
    owner = "nextcloud";
  };

  services.nginx.virtualHosts."cloud.pub.solar" = {
    enableACME = true;
    forceSSL = true;
  };

  services.nextcloud = {
    hostName = "cloud.pub.solar";
    home = "/var/lib/nextcloud";

    enable = true;
    package = pkgs.nextcloud27;
    https = true;
    secretFile = config.age.secrets."nextcloud-secrets".path; # secret
    maxUploadSize = "1G";

    configureRedis = true;

    notify_push = {
      enable = true;
    };

    config = {
      adminuser = "admin";
      adminpassFile = config.age.secrets."nextcloud-admin-pass".path;
      dbuser = "nextcloud";
      dbtype = "pgsql";
      dbname = "nextcloud";
      dbtableprefix = "oc_";
      overwriteProtocol = "https";

      trustedProxies = [
        "127.0.0.1"
        "::1"
      ];
    };

    extraOptions = {
      overwrite.cli.url = "http://cloud.pub.solar";

      installed = true;
      default_phone_region = "+49";
      mail_sendmailmode = "smtp";
      mail_from_address = "nextcloud";
      mail_smtpmode = "smtp";
      mail_smtpauthtype = "PLAIN";
      mail_domain = "pub.solar";
      mail_smtpname = "admins@pub.solar";
      mail_smtpsecure = "tls";
      mail_smtpauth = 1;
      mail_smtphost = "mx2.greenbaum.cloud";
      mail_smtpport = "587";

      # This is to allow connections to collabora and keycloak, among other services
      # running on the same host
      #
      # https://docs.nextcloud.com/server/stable/admin_manual/configuration_server/config_sample_php_parameters.html?highlight=allow_local_remote_servers%20true
      # https://github.com/ONLYOFFICE/onlyoffice-nextcloud/issues/293
      allow_local_remote_servers = true;

      enable_previews = true;
      enabledPreviewProviders = [
        "OC\\Preview\\PNG"
        "OC\\Preview\\JPEG"
        "OC\\Preview\\GIF"
        "OC\\Preview\\BMP"
        "OC\\Preview\\XBitmap"
        "OC\\Preview\\Movie"
        "OC\\Preview\\PDF"
        "OC\\Preview\\MP3"
        "OC\\Preview\\TXT"
        "OC\\Preview\\MarkDown"
      ];
      preview_max_x = "1024";
      preview_max_y = "768";
      preview_max_scale_factor = "1";

      auth.bruteforce.protection.enabled = true;
      trashbin_retention_obligation = "auto,7";
      skeletondirectory = "";
      defaultapp = "file";
      activity_expire_days = "14";
      integrity.check.disabled = false;
      updater.release.channel = "stable";
      loglevel = 0;
      # maintenance = false;
      app_install_overwrite = [
        "pdfdraw"
        "integration_whiteboard"
      ];
      htaccess.RewriteBase = "/";
      theme = "";
      simpleSignUpLink.shown = false;
    };

    phpOptions = {
      "opcache.interned_strings_buffer" = "16";
    };

    # Calculated with 4GiB RAM, 80MiB process size available on
    # https://spot13.com/pmcalculator/
    poolSettings = {
      pm = "dynamic";
      "pm.max_children" = "52";
      "pm.max_requests" = "500";
      "pm.max_spare_servers" = "39";
      "pm.min_spare_servers" = "13";
      "pm.start_servers" = "13";
    };

    caching.redis = true;
    autoUpdateApps.enable = true;
    database.createLocally = true;
  };

  services.restic.backups.nextcloud = flake.self.lib.droppieBackup {
    paths = [
      "/var/lib/nextcloud/data"
      "/tmp/nextcloud-backup.sql"
    ];
    backupPrepareCommand = ''
      ${pkgs.sudo}/bin/sudo -iu postgres ${pkgs.postgresql}/bin/pg_dump -d nextcloud > /tmp/nextcloud-backup.sql
    '';
    backupCleanupCommand = ''
      rm /tmp/nextcloud-backup.sql
    '';
  };
}