{ config, lib, ... }: let

    hostPort = 9001;

    subdomain = "pihole";

    name = "pihole";

in {

    options.sysconfig.docker.pihole.enable = with lib; mkOption {
        type = with types; bool;
        default = false;
    };

    config = lib.mkIf (config.sysconfig.docker.pihole.enable && config.sysconfig.docker.enable) {

        environment.etc."resolv.conf" = {
            enable = true;
            text = ''
                nameserver 127.0.0.1
                nameserver 1.1.1.1
                nameserver 1.0.0.1
                options edns0
            '';

            user = "root";
            mode = "0664";
        };
 
        networking.firewall.interfaces = {
            "ve-traefik" = {
                allowedTCPPorts = [ hostPort ];
            };
        };

        virtualisation.oci-containers.containers.pihole = {
            image = "pihole/pihole:latest";

            # unstable, waiting for 26.05
            #pull = "newer";

            hostname = "${subdomain}.esotericbytes.com";

            networks = [
                "docker-main"
            ];

            labels = {
                "traefik.enable" = "true";
                "traefik.http.routers.${name}.entrypoints" = "localsecure";
                "traefik.http.routers.${name}.rule" = "Host(`${subdomain}.esotericbytes.com`)";
                "traefik.http.routers.${name}.service" = "${name}";
                "traefik.http.routers.${name}.tls.certResolver" = "cloudflare";
                
                #"traefik.http.services.${name}.loadbalancer.server.url" = "http://192.168.100.10:${builtins.toString hostPort}";
                "traefik.http.services.${name}.loadbalancer.server.port" = "80";
            };

            extraOptions = [
                "--ip=192.168.101.12"
            ];

            ports = [
                "${builtins.toString hostPort}:80"
                "127.0.0.1:53:53/tcp"
                "127.0.0.1:53:53/udp"
            ];

            volumes = [
                "vol_pihole:/etc/pihole"
            ];

            environment = {
                FTLCONF_webserver_api_password = "7567";
                FTLCONF_dns_listeningMode = "ALL";
            };
        };
    };
}