# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

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

{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
      ./../../modules/nixos/cspark-single-gpu-passthru/module.nix
      ./../../modules/nixos/cspark-desktop-plasma/module.nix
      ./../../modules/nixos/cspark-desktop-gnome/module.nix
      ./../../modules/nixos/cspark-desktop-sway/module.nix
      ./../../modules/nixos/cspark-desktop-niri/module.nix
      ./../../modules/nixos/cspark-desktop-exwm/module.nix
      inputs.home-manager.nixosModules.default
    ];

  # Bootloader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  networking.hostName = "cspark-nixos-desktop"; # Define your hostname.

  # Enable networking
  networking.networkmanager.enable = true;
  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.

  # Enable musnix, a module for real-time audio.
  musnix.enable = false;
  musnix.kernel.realtime = true; # Realtime kernel

  # Custom desktop environments
  # cspark-desktop-plasma.enable = true;
  # cspark-desktop-gnome.enable = true;
  # cspark-desktop-sway.enable = true;
  # cspark-desktop-niri.enable = true;
  cspark-desktop-exwm.enable = true;

  # My audio interface has issues after coming out from suspend/hibernate, this will reset it to fix it when necessary.
  systemd.services.audiointerface-reset-unbind = {
    description = "Resets audio interface to clear up any issues - de-initialises audio interface before sleeping/hibernating/shutting down";
    wantedBy = [ "suspend.target" "hibernate.target" "hybrid-sleep.target" "shutdown.target" ];
    before = [ "systemd-suspend.service" "systemd-hibernate.service" "systemd-hybrid-sleep.service" "shutdown.target" ];
    path = with pkgs; [ bash coreutils kmod ];
    enable = true;
    serviceConfig = {
      User = "root";
      Group = "root";
    };
    script = "
          # Unbind audio interface
          echo `grep 0a73 /sys/bus/usb/devices/*/idVendor | cut -d '/' -f 6` > /sys/bus/usb/drivers/usb/unbind
          # Remove snd_usb_audio once no longer in use
          while ! modprobe -r snd_usb_audio; do
                sleep 1
  	      done
             ";
  };
  systemd.services.audiointerface-reset-bind = {
    description = "Resets audio interface to clear up any issues - re-initialises audio interface after sleeping/hibernating";
    wantedBy = [ "suspend.target" "hibernate.target" "hybrid-sleep.target" ];
    after = [ "systemd-suspend.service" "systemd-hibernate.service" "systemd-hybrid-sleep.service" ];
    path = with pkgs; [ bash coreutils kmod systemd ];
    enable = true;
    serviceConfig = {
      User = "root";
      Group = "root";
    };
    script = "
          systemctl stop audiointerface-reset-unbind.service
          modprobe snd_usb_audio
  	      # Rebind audio interface
  	      echo `grep 0a73 /sys/bus/usb/devices/*/idVendor | cut -d '/' -f 6` > /sys/bus/usb/drivers/usb/bind
             ";
  };

  # Home Manager Configuration
  home-manager = {
    extraSpecialArgs = { inherit inputs; };
    users = {
      "cspark" = import ./home.nix;
    };
  };

  # Steam Game Platform
  programs.steam = {
    enable = true;
    # remotePlay.openFirewall = true; # Open ports in the firewall for Steam Remote Play
    # dedicatedServer.openFirewall = true; # Open ports in the firewall for Source Dedicated Server
    gamescopeSession.enable = true;

    #package = pkgs.steam.override {
    #  extraLibraries = p: with p; [
    #    gfxreconstruct
    #    glslang
    #    spirv-cross
    #    spirv-headers
    #    spirv-tools
    #    vulkan-extension-layer
    #    vulkan-headers
    #    vulkan-loader
    #    vulkan-tools
    #    vulkan-tools-lunarg
    #    vulkan-utility-libraries
    #    vulkan-validation-layers
    #    vkdisplayinfo
    #    vkd3d
    #    vkd3d-proton
    #    vk-bootstrap
    #  ];
    #  extraPkgs = p: with p; [
    #    gfxreconstruct
    #    glslang
    #    spirv-cross
    #    spirv-headers
    #    spirv-tools
    #    vulkan-extension-layer
    #    vulkan-headers
    #    vulkan-loader
    #    vulkan-tools
    #    vulkan-tools-lunarg
    #    vulkan-utility-libraries
    #    vulkan-validation-layers
    #    vkdisplayinfo
    #    vkd3d
    #    vkd3d-proton
    #    vk-bootstrap
    #  ];
    #};
  };

  # Single GPU Passthru Configuration
  cspark-single-gpu-passthru.enable = true;
  cspark-single-gpu-passthru.vmName = "win11";
  cspark-single-gpu-passthru.gpuPCI = "0000:08:00.0";
  cspark-single-gpu-passthru.gpuAudioPCI = "0000:08:00.1";

  # Waydroid Android Emulation
  virtualisation.waydroid.enable = true;

  # Docker for development
  virtualisation.docker.enable = true;

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    nvtopPackages.amd
  ];

  environment.variables = {
    VK_ICD_FILENAMES = "/run/opengl-driver/share/vulkan/icd.d/radeon_icd.x86_64.json:/run/opengl-driver-32/share/vulkan/icd.d/radeon_icd.i686.json";
  };

  environment.sessionVariables = {
    VK_ICD_FILENAMES = "/run/opengl-driver/share/vulkan/icd.d/radeon_icd.x86_64.json:/run/opengl-driver-32/share/vulkan/icd.d/radeon_icd.i686.json";
  };

}