{lib, tf, ...}:
{
  services.postgresql = {
    enable = true;
    authentication = lib.mkForce ''
      local all all trust
    '';
    ensureDatabases = [
      "atticd"
    ];
    ensureUsers = [
      {
        name = "atticd";
        ensureDBOwnership = true;
      }
    ];
  };

  services.atticd = {
    enable = true;
    # one `monolithic` and any number of `api-server` nodes
    mode = "monolithic";
    environmentFile = "/var/lib/secrets/attic_env";
    # https://github.com/zhaofengli/attic/blob/main/server/src/config-template.toml
    settings = {
      # Socket address to listen on
      # listen = "[::]:8080";
      # listen = "0.0.0.0:8080";
      listen = "127.0.0.1:8080";

      # Allowed `Host` headers
      #
      # This _must_ be configured for production use. If unconfigured or the
      # list is empty, all `Host` headers are allowed.
      allowed-hosts = [];

      # The canonical API endpoint of this server
      #
      # This is the endpoint exposed to clients in `cache-config` responses.
      #
      # This _must_ be configured for production use. If not configured, the
      # API endpoint is synthesized from the client's `Host` header which may
      # be insecure.
      #
      # The API endpoint _must_ end with a slash (e.g., `https://domain.tld/attic/`
      # not `https://domain.tld/attic`).
      api-endpoint = "https://${tf.resource.hetznerdns_zone.main.name}/";

      # Whether to soft-delete caches
      #
      # If this is enabled, caches are soft-deleted instead of actually
      # removed from the database. Note that soft-deleted caches cannot
      # have their names reused as long as the original database records
      # are there.
      #soft-delete-caches = false;

      # Whether to require fully uploading a NAR if it exists in the global cache.
      #
      # If set to false, simply knowing the NAR hash is enough for
      # an uploader to gain access to an existing NAR in the global
      # cache.
      #require-proof-of-possession = true;

      # Database connection
      database = {
        # Connection URL
        #
        # For production use it's recommended to use PostgreSQL.
        # url = "postgresql:///atticd:password@127.0.0.1:5432/atticd";
        url = "postgresql:///atticd?host=/run/postgresql";

        # Whether to enable sending on periodic heartbeat queries
        #
        # If enabled, a heartbeat query will be sent every minute
        #heartbeat = false;
      };

      # File storage configuration
      storage = {
        # Storage type
        #
        # Can be "local" or "s3".
        type = "s3";

        # ## Local storage

        # The directory to store all files under
        # path = "%storage_path%";

        # ## S3 Storage (set type to "s3" and uncomment below)

        # The AWS region
        region = tf.resource.cloudflare_r2_bucket.atticd.location;  # is this even used for R2?

        # The name of the bucket
        bucket = tf.resource.cloudflare_r2_bucket.atticd.name;

        # Custom S3 endpoint
        #
        # Set this if you are using an S3-compatible object storage (e.g., Minio).
        endpoint = "https://2b56368370c7a8e7f41328f0b8d4040a.r2.cloudflarestorage.com";

        # Credentials
        #
        # If unset, the credentials are read from the `AWS_ACCESS_KEY_ID` and
        # `AWS_SECRET_ACCESS_KEY` environment variables.
        # storage.credentials = {
        #   access_key_id = "";
        #   secret_access_key = "";
        # };
      };

      # Data chunking
      #
      # Warning: If you change any of the values here, it will be
      # difficult to reuse existing chunks for newly-uploaded NARs
      # since the cutpoints will be different. As a result, the
      # deduplication ratio will suffer for a while after the change.
      chunking = {
        # The minimum NAR size to trigger chunking
        #
        # If 0, chunking is disabled entirely for newly-uploaded NARs.
        # If 1, all NARs are chunked.
        nar-size-threshold = 65536; # chunk files that are 64 KiB or larger

        # The preferred minimum size of a chunk, in bytes
        min-size = 16384;            # 16 KiB

        # The preferred average size of a chunk, in bytes
        avg-size = 65536;            # 64 KiB

        # The preferred maximum size of a chunk, in bytes
        max-size = 262144;           # 256 KiB
      };

      # Compression
      compression = {
        # Compression type
        #
        # Can be "none", "brotli", "zstd", or "xz"
        type = "zstd";

        # Compression level
        #level = 8;
      };

      # Garbage collection
      garbage-collection = {
        # The frequency to run garbage collection at
        #
        # By default it's 12 hours. You can use natural language
        # to specify the interval, like "1 day".
        #
        # If zero, automatic garbage collection is disabled, but
        # it can still be run manually with `atticd --mode garbage-collector-once`.
        interval = "12 hours";

        # Default retention period
        #
        # Zero (default) means time-based garbage-collection is
        # disabled by default. You can enable it on a per-cache basis.
        #default-retention-period = "6 months";
      };

      jwt = {
        # WARNING: Changing _anything_ in this section will break any existing
        # tokens. If you need to regenerate them, ensure that you use the the
        # correct secret and include the `iss` and `aud` claims.

        # JWT `iss` claim
        #
        # Set this to the JWT issuer that you want to validate.
        # If this is set, all received JWTs will validate that the `iss` claim
        # matches this value.
        #token-bound-issuer = "some-issuer";

        # JWT `aud` claim
        #
        # Set this to the JWT audience(s) that you want to validate.
        # If this is set, all received JWTs will validate that the `aud` claim
        # contains at least one of these values.
        #token-bound-audiences = ["some-audience1", "some-audience2"];
      };

      # jwt.signing = {
      #   # JWT RS256 secret key
      #   #
      #   # Set this to the base64-encoded private half of an RSA PEM PKCS1 key.
      #   # TODO
      #   # You can also set it via the `ATTIC_SERVER_TOKEN_RS256_SECRET_BASE64`
      #   # environment variable.
      #   token-rs256-secret-base64 = "%token_rs256_secret_base64%";

      #   # JWT HS256 secret key
      #   #
      #   # Set this to the base64-encoded HMAC secret key.
      #   # You can also set it via the `ATTIC_SERVER_TOKEN_HS256_SECRET_BASE64`
      #   # environment variable.
      #   #token-hs256-secret-base64 = "";
      # };
    };
  };
}