{ config, lib, pkgs, ... }:

let cfg = config.services.immichMlContainer;

in {
  options.services.immichMlContainer = with types; {
    enable = mkEnableOption "Enable machine learning container.";

    hostnames = mkOption {
      type = listOf str;
      description = "List of hostnames at which this container can be reached.";
    };

    port = mkOption {
      type = port;
      description = "Port on which to listen for connections.";
    };

    state-directory = mkOption {
      type = str;
      description = "Path on which to store service state.";
    };

    immich-version = mkOption {
      type = str;
      description = "";
    };

    # TODO: maybe have different types?
  };

  config = {
    systemd.tmpfiles.rules = [ "d ${cfg.state-directory} 0750 root root - -" ];

    virtualisation.arion.projects.immich.settings = let
      image = { ... }: {
        project.name = "immich-ml";
        services.immich-ml = {
          image.rawConfig.deploy.resoruces.reservations.devices = [{
            driver = "nvidia";
            count = 1;
            capabilities = [ "gpu" ];
          }];
          service = {
            image =
              "ghcr.io/immich-app/immich-machine-learning:${cfg.immich-version}-cuda";
            restart = "always";
            ports = [ "${toString cfg.port}:3003" ];
            volumes = [ "${cfg.state-directory}:/cache" ];
          };
        };
      };
    in { imports = [ image ]; };

    services.nginx = {
      enable = true;
      virtualHosts = genAttrs cfg.hostnames (hostname: {
        enableACME = false;
        forceSSL = false;
        locations."/" = {
          proxyPass = "http://127.0.0.1:${toString cfg.port}";
          recommendedProxySettings = true;
        };
      });
    };
  };
}