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

let
  cfg = config.homelab.apps.jellyfin;

  networkName = "jellyfin";

  UID = 3008;
  GID = config.users.groups.media.gid;
in {
  options.homelab.apps.jellyfin.enable = lib.mkEnableOption "Jellyfin using Docker";

  config = lib.mkIf cfg.enable {
    homelab = {
      users = {
        apps.enable = true;
        media.enable = true;
      };
      virtualisation.containers.enable = true;
    };

    fileSystems = {
      "/srv/audio" = {
        device = "192.168.0.11:/mnt/SMALL/MEDIA/AUDIO";
        fsType = "nfs";
        options = [
          "ro"
          "nfsvers=4.2"
          "async" "soft"
          "timeo=100" "retry=50" "actimeo=1800" "lookupcache=all"
          "nosuid" "tcp"
        ];
      };

      "/srv/video" = {
        device = "192.168.0.11:/mnt/SMALL/MEDIA/VIDEO";
        fsType = "nfs";
        options = [
          "ro"
          "nfsvers=4.2"
          "async" "soft"
          "timeo=100" "retry=50" "actimeo=1800" "lookupcache=all"
          "nosuid" "tcp"
        ];
      };

      "/srv/homevideo" = {
        device = "192.168.0.11:/mnt/BIG/MEDIA/HOMEVIDEO/ARCHIVE";
        fsType = "nfs";
        options = [
          "ro"
          "nfsvers=4.2"
          "async" "soft"
          "timeo=100" "retry=50" "actimeo=1800" "lookupcache=all"
          "nosuid" "tcp"
        ];
      };

      "/srv/photo" = {
        device = "192.168.0.11:/mnt/BIG/MEDIA/PHOTO/ARCHIVE";
        fsType = "nfs";
        options = [
          "ro"
          "nfsvers=4.2"
          "async" "soft"
          "timeo=100" "retry=50" "actimeo=1800" "lookupcache=all"
          "nosuid" "tcp"
        ];
      };
    };

    users.users.jellyfin = {
      uid = lib.mkForce UID;
      isSystemUser = true;
      group = config.users.groups.apps.name;
      extraGroups = [
        config.users.groups.media.name
      ];
      home = "/var/empty";
      shell = null;
    };

    # Make sure the Docker network exists.
    systemd.services."docker-${networkName}-create-network" = {
      description = "Create Docker network for ${networkName}";
      requiredBy = [
        "docker-jellyfin.service"
        "docker-feishin.service"
      ];
      serviceConfig = {
        Type = "oneshot";
        RemainAfterExit = true;
      };
      script = ''
        if ! ${pkgs.docker}/bin/docker network ls | grep -q ${networkName}; then
          ${pkgs.docker}/bin/docker network create ${networkName}
        fi
      '';
    };

    virtualisation.oci-containers.containers = {
      jellyfin = {
        hostname = "jellyfin";
        image = "jellyfin/jellyfin:10.10.0";
        user = "${toString UID}:${toString GID}";
        autoStart = true;
        ports = [
          "8096:8096/tcp"
          # "8920:8920/tcp"
        ];
        extraOptions = [
          "--network=${networkName}"
          "--device=nvidia.com/gpu=all" # Equivalent to --gpus=all
        ];
        volumes = [
          "jellyfin-config:/config"
          "cache:/cache"

          "/srv/audio:/media/audio"
          "/srv/video:/media/video"
          "/srv/homevideo:/media/homevideo"
          "/srv/photo:/media/photo"
        ];
        environment = {
          # TODO
        };
      };

      jellyfin-vue = {
        hostname = "jellyfin-vue";
        image = "ghcr.io/jellyfin/jellyfin-vue:unstable";
        autoStart = true;
        ports = [
          "8080:80/tcp"
        ];
        extraOptions = [
          "--network=${networkName}"
        ];
        labels = {
        };
      };

      feishin = let
        feishinPort = "9180";
      in {
        hostname = "feishin";
        image = "ghcr.io/jeffvli/feishin:0.7.1";
        autoStart = true;
        ports = [
          "${feishinPort}:9180/tcp" # Web player (HTTP)
        ];
        extraOptions = [
          "--network=${networkName}"
        ];
        environment = {
          # pre defined server name
          SERVER_NAME = "Hugo";
          # When true AND name/type/url are set, only username/password can be toggled
          SERVER_LOCK = "true";
          # Either "jellyfin" or "navidrome"
          SERVER_TYPE = "jellyfin";
          # http://address:port
          SERVER_URL= "https://jelly.depeuter.dev";
          TZ = config.time.timeZone;
        };
        labels = {
          "traefik.enable" = "true";
          "traefik.http.routers.feishin.rule" = "Host(`play.jelly.depeuter.dev`)";
          "traefik.http.services.feishin.loadbalancer.server.port" = feishinPort;
          "traefik.tls.options.default.minVersion" = "VersionTLS13";
        };
      };
    };
  };
}