{ config, lib, ... }:
let
  cfg = config.os.srv.prometheus;
in
{
  options.os.srv.prometheus.enable = lib.mkEnableOption "enables prometheus";
  config = lib.mkIf cfg.enable {
    services.prometheus = {
      enable = true;
      port = 9090;

      alertmanagers = [
        {
          static_configs = [ { targets = [ "127.0.0.1:9093" ]; } ];
        }
      ];

      scrapeConfigs = [
        {
          job_name = "prometheus";
          static_configs = [ { targets = [ "127.0.0.1:9090" ]; } ];
        }
        {
          job_name = "node_exporter";
          static_configs = [ { targets = [ "127.0.0.1:9100" ]; } ];
        }
        {
          job_name = "uptime_kuma";
          metrics_path = "/metrics";
          static_configs = [ { targets = [ "127.0.0.1:3001" ]; } ];
        }
      ];
      exporters = {
        node = {
          enable = true;
          enableCollectors = [ "systemd" ];
          port = 9100;
        };

        alertmanager = {
          enable = true;
          port = 9093;
          configuration = {
            route = {
              receiver = "default-receiver";
              group_by = [ "alertname" ];
            };
            receivers = [
              {
                name = "default-receiver";
              }
            ];
          };
        };

        smokeping = {
          enable = true;
          listenAddress = "127.0.0.1";

          pingInterval = "1s";

          hosts = [
            "10.0.0.1" # Personal Router
            "192.168.0.1" # ISP Modem Box
            "84.116.254.69" # First ISP Hop
            "185.182.244.39" # Regional Katowice Hub
            "1.1.1.1" # Cloudflare DNS
            "8.8.8.8" # Google DNS
            "130.162.223.123" # OCI Instance
          ];
        };
      };
    };
  };
}