{ lib, config, pkgs, ... }:
let
  cfg = config.services.vm_grafana;
in
{
  options.services.vm_grafana = {
    enable = lib.mkEnableOption "Enable minimal config";
    proxy_ip = lib.mkOption {
      type = lib.types.str;
      description = "The Nginx proxy IP address";
    };
  };
    config = lib.mkIf cfg.enable {
    services.rsyslogd.enable = true;
    services.grafana = {
      enable = true;
      settings = {
        server = {
          protocol = "http";
          http_addr = "${config.services.vm.vm_ip}";
          http_port = 3000;
          domain = "logs.le43.eu";
          root_url = "https://logs.le43.eu";
          serve_from_sub_path = false;
        };
      };
    };
    services.prometheus = {
      enable = true;
      port = 9001;
      scrapeConfigs = [
        {
          job_name = "grafana";
          static_configs = [{
            targets = [ "127.0.0.1:9002" ];
          }];
        }
        {
          job_name = "nginx";
          static_configs = [{
            targets = [ "${cfg.proxy_ip}:9002" ];
          }];
        }
      ];
      exporters = {
        node = {
          enable = true;
          enabledCollectors = [ "systemd" ];
          port = 9002;
        };
      };
    };
    services.loki = {
      enable = true;
      configuration = {
        server.http_listen_port = 3100;
        server.grpc_listen_port = 9096;
        auth_enabled = false;
        ingester = {
          lifecycler = {
            address = "127.0.0.1";
            ring = {
              kvstore = {
                store = "inmemory";
              };
              replication_factor = 1;
            };
          };
          chunk_idle_period = "1h";
          max_chunk_age = "1h";
          chunk_target_size = 999999;
          chunk_retain_period = "30s";
        };
        schema_config = {
          configs = [{
            from = "2022-06-06";
            store = "boltdb-shipper";
            object_store = "filesystem";
            schema = "v13";
            index = {
              prefix = "index_";
              period = "24h";
            };
          }];
        };
        storage_config = {
          boltdb_shipper = {
            active_index_directory = "/var/lib/loki/boltdb-shipper-active";
            cache_location = "/var/lib/loki/boltdb-shipper-cache";
            cache_ttl = "24h";
          };

          filesystem = {
            directory = "/var/lib/loki/chunks";
          };
        };

        limits_config = {
          reject_old_samples = true;
          reject_old_samples_max_age = "168h";
          allow_structured_metadata = false;
        };

        table_manager = {
          retention_deletes_enabled = false;
          retention_period = "0s";
        };
        compactor = {
          working_directory = "/var/lib/loki";
          compactor_ring = {
            kvstore = {
              store = "inmemory";
            };
          };
        };
      };
    };
    services.promtail = {
      enable = true;
      configuration = {
        server = {
          http_listen_port = 3101;
          grpc_listen_port = 9095;
        };
        positions = {
          filename = "/tmp/positions.yaml";
        };
        clients = [{
          url = "http://127.0.0.1:3100/loki/api/v1/push";
        }];
        scrape_configs = [{
          job_name = "journal";
          journal = {
            max_age = "12h";
            labels = {
              job = "systemd-journal";
              host = "localhost";
            };
          };
          relabel_configs = [{
            source_labels = [ "__journal__systemd_unit" ];
            target_label = "unit";
          }];
        }];
      };
    };

    # Open ports in the firewall.
    networking.firewall.allowedTCPPorts = [ 3000 3100 3101 9001 ];
  };
}