{ config, pkgs, ... }:

{
  # Minecraft Prometheus exporter (player count, server status, ping)
  virtualisation.oci-containers.containers.mc-monitor = {
    image = "itzg/mc-monitor:latest";
    extraOptions = [ "--network=host" ];
    dependsOn = [ "minecraft" ];
    cmd = [ "export-for-prometheus" "--servers" "localhost:25565" "--port" "9150" ];
  };

  # Container metrics (CPU, memory, network, disk I/O per container)
  services.cadvisor = {
    enable = true;
    port = 9180;
  };

  services.prometheus = {
    enable = true;
    port = 9090;
    retentionTime = "30d";
    extraFlags = [ "--storage.tsdb.retention.size=1GB" ];

    exporters = {
      node = {
        enable = true;
        port = 9100;
        enabledCollectors = [
          "cpu"
          "diskstats"
          "filesystem"
          "loadavg"
          "meminfo"
          "netdev"
          "netstat"
          "stat"
          "time"
          "vmstat"
          "systemd"
          "processes"
          "interrupts"
          "conntrack"
          "tcpstat"
        ];
      };
    };

    scrapeConfigs = [
      {
        job_name = "node";
        static_configs = [{
          targets = [ "localhost:9100" ];
          labels = { instance = "minecraft-server"; };
        }];
        scrape_interval = "15s";
      }
      {
        job_name = "minecraft";
        static_configs = [{
          targets = [ "localhost:9150" ];
          labels = { instance = "minecraft-server"; };
        }];
        scrape_interval = "15s";
      }
      {
        job_name = "cadvisor";
        static_configs = [{
          targets = [ "localhost:9180" ];
          labels = { instance = "minecraft-server"; };
        }];
        scrape_interval = "15s";
      }
    ];
  };

  services.grafana = {
    enable = true;
    settings = {
      server = {
        http_addr = "127.0.0.1";
        http_port = 3000;
        domain = "status.mc.compsigh.club";
        root_url = "https://status.mc.compsigh.club";
      };
      security = {
        admin_user = "admin";
        admin_password = "$__file{${config.age.secrets.grafana-admin-password.path}}";
        secret_key = "$__file{${config.age.secrets.grafana-secret-key.path}}";
      };
      "auth.anonymous".enabled = false;
      users.allow_sign_up = false;
    };

    provision = {
      enable = true;

      datasources.settings.datasources = [
        {
          name = "Prometheus";
          type = "prometheus";
          uid = "prometheus";
          url = "http://localhost:9090";
          isDefault = true;
          editable = false;
        }
      ];

      dashboards.settings.providers = [
        {
          name = "Minecraft Server";
          options.path = "${pkgs.writeTextDir "dashboards/minecraft.json"
            (builtins.readFile ../configs/minecraft-dashboard.json)}/dashboards";
          options.foldersFromFilesStructure = false;
        }
      ];
    };
  };
}