{ config, lib, pkgs, ... }:
let
  cfg = config.my.services.grafana;
  secrets = config.age.secrets;
in
{
  options.my.services.grafana = with lib; {
    enable = mkEnableOption "grafana observability stack";
    vhostName = mkOption {
      type = types.str;
      example = "dash.fcuny.net";
      description = "Name for the virtual host";
    };
  };

  config = lib.mkIf cfg.enable {
    services.grafana = {
      enable = true;
      settings = {
        security.adminUser = "fcuny";
        analytics.reporting_enabled = false;
        server.http_port = 4000;
        server.http_addr = "127.0.0.1";
      };
      provision = {
        enable = true;
        datasources.settings.datasources = [{
          name = "prometheus";
          type = "prometheus";
          isDefault = true;
          url = "http://localhost:9090";
        }];
        dashboards.settings.providers = [{
          disableDeletion = true;
          options.path = ./dashboards;
        }];
      };
    };

    services.nginx.virtualHosts."${cfg.vhostName}" = {
      forceSSL = true;
      useACMEHost = cfg.vhostName;
      listen = [
        {
          addr = "100.85.232.66";
          port = 443;
          ssl = true;
        }
        {
          addr = "100.85.232.66";
          port = 80;
          ssl = false;
        }
      ];
      locations."/" = {
        proxyPass = "http://${config.services.grafana.settings.server.http_addr}:${
            toString config.services.grafana.settings.server.http_port
          }";
        proxyWebsockets = true;
      };
    };

    security.acme.certs."${cfg.vhostName}" = {
      dnsProvider = "gcloud";
      credentialsFile = secrets."acme/credentials".path;
    };

    my.services.backup = {
      paths = [ "/var/lib/grafana" ];
      exclude = [
        "/var/lib/grafana/data/log/"
        "/var/lib/grafana/log/"
      ];
    };
  };
}