{ config, pkgs, ... }:

{
  # Main NixOS configuration for ops-jrz1 server
  # Imports host-specific configuration from hosts/ops-jrz1.nix

  # Boot loader configuration (placeholder - will be customized for actual server)
  boot.loader.grub.enable = true;
  boot.loader.grub.device = "/dev/sda";  # REPLACE_ME with actual device

  # Filesystem configuration (minimal placeholder for flake validation)
  fileSystems."/" = {
    device = "/dev/sda1";  # REPLACE_ME with actual device
    fsType = "ext4";
  };

  # Network configuration
  networking.useDHCP = false;
  networking.interfaces.eth0.useDHCP = true;  # REPLACE_ME with actual interface

  # Time zone
  time.timeZone = "UTC";

  # Internationalization
  i18n.defaultLocale = "en_US.UTF-8";

  # System packages
  environment.systemPackages = with pkgs; [
    vim
    git
    htop
    curl
  ];

  # SSH configuration
  services.openssh = {
    enable = true;
    settings = {
      PermitRootLogin = "prohibit-password";
      PasswordAuthentication = false;
    };
  };

  # Firewall (will be configured for Matrix services)
  networking.firewall = {
    enable = true;
    allowedTCPPorts = [ 22 80 443 ];  # SSH, HTTP, HTTPS
  };

  # This value determines the NixOS release compatibility
  system.stateVersion = "24.05";
}