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

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

  networking.hostName = "electra"; 

  # ==========================================
  # 1. HARDWARE SPECIFICS (Framework 16)
  # ==========================================
  hardware.enableAllFirmware = true; 
  hardware.cpu.amd.updateMicrocode = true;

  # Fingerprint Reader
  services.fprintd.enable = true;
  security.pam.services.sudo.fprintAuth = true;
  security.pam.services.kde.fprintAuth = true;
  security.pam.services.sddm.fprintAuth = false;

  # ==========================================
  # 2. GRAPHICS & KERNEL (Strix Point + RTX 5070)
  # ==========================================
  
  # Kernel Params for Strix Point iGPU
  boot.kernelParams = [ "amdgpu.gttsize=32768" ];
  boot.initrd.kernelModules = [ "amdgpu" ];

  # Graphics Drivers
  hardware.graphics = {
    enable = true;
    enable32Bit = true;
  };

  services.xserver.videoDrivers = [ "nvidia" ];

  hardware.nvidia = {
    modesetting.enable = true;
    powerManagement.enable = true;
    powerManagement.finegrained = true;
    open = true;
    nvidiaSettings = true;
    package = config.boot.kernelPackages.nvidiaPackages.beta;

    prime = {
      offload = {
        enable = true;
        enableOffloadCmd = true;
      };
      amdgpuBusId = "PCI:194:0:0"; 
      nvidiaBusId = "PCI:193:0:0";
    };
  };

  # ==========================================
  # 3. SPECIALISATIONS (Gaming / Eco / No-dGPU)
  # ==========================================
  specialisation = {
    # Option 1: Gaming Mode (Zen Kernel + Max Performance)
    gaming-zen.configuration = {
      system.nixos.tags = [ "Gaming-Zen" ];
      boot.kernelPackages = lib.mkForce pkgs.linuxPackages_zen;
      hardware.nvidia.powerManagement.finegrained = lib.mkForce false; 
    };

    # Option 2: Eco/Battery Mode (TLP + No Turbo)
    battery-saver.configuration = {
      system.nixos.tags = [ "Eco-Battery" ];
      services.power-profiles-daemon.enable = lib.mkForce false;
      services.tlp = {
        enable = lib.mkForce true;
        settings = {
          CPU_SCALING_GOVERNOR_ON_BAT = "powersave";
          CPU_ENERGY_PERF_POLICY_ON_BAT = "power";
          CPU_BOOST_ON_BAT = 0;
          PLATFORM_PROFILE_ON_BAT = "low-power";
        };
      };
    };

    # Option 3: Expansion Shell (Physically Removed GPU)
    no-dgpu.configuration = {
      system.nixos.tags = [ "No-dGPU" ];
      services.xserver.videoDrivers = lib.mkForce [ "modesetting" ];
      boot.blacklistedKernelModules = [ "nvidia" "nvidia_modeset" "nvidia_uvm" "nvidia_drm" ];
      hardware.nvidia = {
        modesetting.enable = lib.mkForce false;
        powerManagement.enable = lib.mkForce false;
        open = lib.mkForce false;
        nvidiaSettings = lib.mkForce false;
        prime.offload.enable = lib.mkForce false;
      };
    };
  };
}