{ config, lib, pkgs, inputs, ... }:

{
  imports =
    [ 
      ./hardware-configuration.nix
    ];

  # Enable automatic system updates
  system.autoUpgrade = {
    enable = true;
    flake = inputs.self.outPath;
    flags = [
      "--update-input"
      "nixpkgs"
      "-L" # print build logs
    ];
    dates = "weekly";
    randomizedDelaySec = "45min";
  };
  # Allow non-free software (RMS will be mad at me :<)
  nixpkgs.config.allowUnfree = true;
  # Enable nix-command and flakes
  nix.settings.experimental-features = [ "nix-command" "flakes"];

  # SystemD-boot is good enough
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;
  systemd.tpm2.enable = false;

  networking.hostName = "mecca"; # Change for given system
  networking.networkmanager.enable = true;  

  # Timezone => AST
  time.timeZone = "America/St_Thomas";
  
  stylix = {
    enable = true;
    image = ./bg.jpg;
  };

  # Hyprland looks nice so I'm using it
  programs.hyprland = {
    enable = true;
    withUWSM = true;
    xwayland.enable = true;
  };
  environment.sessionVariables.NIXOS_OZONE_WL = "1";
  xdg.portal.enable = true;
  xdg.portal.extraPortals = [ pkgs.xdg-desktop-portal-gtk ];

  # using piprewire cuz embrace muh modernity
  services.pipewire = {
    enable = true;
    pulse.enable = true;
  };

  services.libinput.enable = true; # for laptop touchpad

  # Laptop battery optimizations
  # NOTE: Comment out if on PC/Not required for your rig
  services.tlp = {
    enable = true;
    settings = {
      CPU_SCALING_GOVERNOR_ON_AC = "performance";
      CPU_SCALING_GOVERNOR_ON_BAT = "powersave";

      CPU_ENERGY_PERF_POLICY_ON_AC = "performance";
      CPU_ENERGY_PERF_POLICY_ON_BAT = "power";

      CPU_MIN_PERF_ON_AC = 0;
      CPU_MAX_PERF_ON_AC = 100;
      CPU_MIN_PERF_ON_BAT = 0;
      CPU_MAX_PERF_ON_BAT = 20;

      START_CHARGE_THRESH_BAT0 = 40; # 40 and below it starts to charge
      STOP_CHARGE_THRESH_BAT0 = 80; # 80 and above it stops charging
    };
  };
  services.auto-cpufreq.enable = true;
  services.auto-cpufreq.settings = {
    battery = {
      governor = "powersave";
      turbo = "never";
    };
    charger = {
      governor = "performance";
      turbo = "auto";
    };
  };
  powerManagement.powertop.enable = true;

  # Kanata setup 
  # Mostly copied from https://dev.to/shanu-kumawat/how-to-set-up-kanata-on-nixos-a-step-by-step-guide-1jkc
  boot.kernelModules = [ "uinput" ]; # Enable uinput kernel module
  hardware.uinput.enable = true; # Enable uinput
  # Set up udev rules for uinput
  services.udev.extraRules = '' 
    KERNEL=="uinput", MODE="0660", GROUP="uinput", OPTIONS+="static_node=uinput"
  '';   
  users.groups.uinput = {  }; # ensure uinput group exists
  # Add Kanata service user to necessary groups
  systemd.services.kanata-internalKeyboard.serviceConfig = {
    SupplementaryGroups = [
      "input"
      "uinput"
    ];
  };
  # Kanata configuration
  services.kanata = {
    enable = true;
    keyboards = {
      internalKeyboard = {
        devices = [
          "/dev/input/by-path/platform-i8042-serio-0-event-kbd"
        ];
      configFile = builtins.fetchurl {
        url = https://git.luluslly.xyz/lulusilly/dotfiles/raw/branch/master/.config/kanata/conf.kbd;
        sha256 = "1jv6051igv4yxwr9bxzil6qrynvg3imlnh65lxhjdfcvpnmlcy6p";
      };
      };
    };
  };

  # Default user account
  users.users.lunita = {
    isNormalUser = true;
    extraGroups = [ "wheel" ]; 
    shell = pkgs.zsh;
  };
  # Enabling Emacs server
  services.emacs = {
    enable = true;
    package = pkgs.emacs-gtk;
  };
  # Enable zsh
  programs.zsh.enable = true;
  # Going with FF for now. Might switch over to Zen eventually
  programs.firefox.enable = true; 
  # Enable Tailscale for homeserver stuff
  services.tailscale.enable = true;
  # Enable syncthing for Obsidian & KeePass DB sync across devices
  services.syncthing.enable = true;

  environment.systemPackages = with pkgs; [
    # home-manager # For using Nix Home Manager
    zsh # Default user shell
    minecraftia # font
    jetbrains-mono # font
    terminus_font # font
    neovim # Terminal text editor
    wget # coreutil for some script compatibility
    waybar # Status bar
    libnotify # Desktop notifications
    swww # Wallpaper manager
    brightnessctl # For laptop backlight brightness control
    grim # screenshot utility
    slurp # select utility
    wl-clipboard # xclip alternative
    rofi-wayland # Dmenu replacement for Wayland
    ghostty # Terminal emulator
  ];

  # Enable OpenSSH SSH Daemon
  services.openssh.enable = true;

  # Copy sysconf in case this file is deleted or corrupted
  # NOTE: Doesn't work with flakes enabled.
  # system.copySystemConfiguration = true;

  system.stateVersion = "25.05";
}