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

let
  unstable = (import ../modules/unstable.nix config);
  customPkgs = import ../packages/overlay.nix;
  gamemode = pkgs.callPackage ../packages/gamemode {};
in {
  imports = [
    ../generic.nix
    ../modules/hardware/generic.nix ../modules/hardware/video.nix 
    ../modules/fonts.nix
    ../modules/users/alexander.nix
    ../modules/programs/zsh ../modules/programs/git ../modules/programs/mpv ../modules/programs/tmux ../modules/programs/emacs ../modules/programs/firefox ../modules/programs/gnome-terminal ../modules/programs/gnome ../modules/programs/i18n.nix ../modules/programs/gamemode ../modules/programs/nonvm
    ../modules/programs/distributed-build/builder.nix
    #./modules/programs/music
  ];

  nixpkgs.overlays = [
    (import (builtins.fetchGit {
      url = "https://github.com/nix-community/emacs-overlay.git";
      ref = "master";
      rev = "ce0e9482d53d69bedc8416d8a984d00e17607826";
    }))
    customPkgs
  ];
  
  nixpkgs.config.packageOverrides = pkgs: {
    nur = (import ../modules/nur.nix pkgs);
    unstable = unstable;
  };
  
  environment = {
    systemPackages = with pkgs; [
      emacsPgtkGcc
      unstable.firmwareLinuxNonfree
      gajim
      libvirt virt-manager qemu
      gamemode # Custom package
      key-mapper # Custom package
      scream
      linuxPackages_zen.vendor-reset
    ];

    sessionVariables = {
      # Prevent us from having to always type it out
      #NIXOS_CONFIG = "\${HOME}/Development/Personal/nixos-config/hosts/miku.nix";
    };    
  };

  networking = {
    interfaces.enp6s0.useDHCP = false;
    hostName = "miku";
    # Nix otherwise has a conflict with this option
    wireless.enable = lib.mkForce false;

    # Allow scream to connect to this host
    firewall.allowedUDPPorts = [ 4010 ];
  };

  boot = {
    loader = {
      systemd-boot.enable = true;
      efi.canTouchEfiVariables = true;
    };
    extraModprobeConfig = ''
      options kvm_amd nested=1
      options vfio-pci ids=1002:67df,1002:aaf0
    '';
    initrd = {
      availableKernelModules = [ "xhci_pci" "ahci" "usbhid" "sd_mod" "amdgpu" "vendor-reset" ];
      kernelModules = [
        "amdgpu" # GPU (duh)
        "kvm-amd" "vfio_virqfd" "vfio_pci" "vfio_iommu_type1" "vfio" # Virt
        "uinput" # key-mapper
        "vendor-reset"
      ];
    };
    kernelParams = [
      "amd_iommu=on"
      "iommu=pt"
      "sysrq_always_enabled=1"
      "kvm.ignore_msrs=1"
      "kvm.report_ignored_msrs=N"
      "fbcon=rotate:1"
      "quiet"
    ];
    kernelModules = [];
    extraModulePackages = [ pkgs.linuxPackages_zen.vendor-reset ];
    kernelPackages = pkgs.linuxPackages_zen;
  };

  services = {
    # NOTE: key-mapper has a dbus policy file that we need to include
    dbus.packages = [ pkgs.key-mapper ];
    emacs.package = pkgs.emacsPgtkGcc;
    flatpak.enable = true;
    xserver.videoDrivers = [ "amdgpu" ];
    udev.extraRules = ''
      KERNEL=="uinput", GROUP="input"
    '';

    sshd.enable = true;
  };
  
  virtualisation.libvirtd = {
    enable = true;
    qemuOvmf = true;
    qemuRunAsRoot = false;
    qemuVerbatimConfig = ''
      user = "alexander"
      cgroup_device_acl = [
        "/dev/null", "/dev/zero", "/dev/full",
        "/dev/random", "/dev/kvm", "/dev/kqemu",
        "/dev/rtc", "/dev/hpet", "dev/ptmx",
        "/dev/input/by-id/usb-Logitech_G700s_Rechargeable_Gaming_Mouse_93DF48160007-event-mouse",
        "/dev/input/by-id/usb-Razer_Razer_BlackWidow_Ultimate-event-kbd",
        "/dev/input/by-id/usb-Razer_Razer_BlackWidow_Ultimate-if01-event-kbd",
        "/dev/input/by-id/usb-Razer_Razer_BlackWidow_Ultimate-if02-event-mouse",
        "/dev/input/by-id/usb-Razer_Razer_BlackWidow_Ultimate-event-if01"
      ]
    '';
  };

  systemd = {
    services.NetworkManager-wait-online.enable = false;
    user.services = {
      scream = {
        enable = false; # Started by the passthrough script
        description = "Audio receiver for the Scream virtual network sound card";
        wantedBy = [ "multi-user.target" ];
        serviceConfig = {
          Type = "simple";
          ExecStart = "${pkgs.scream}/bin/scream -i virbr0 -o pulse";
          RestartAlways = "always";
        };
      };
      gamemode = {
        enable = true;
        description = "A daemon/lib combo for Linux that allows games to request a set of optimisations be temporarily applied to the host OS.";
        wantedBy = [ "multi-user.target" ];
        serviceConfig = {
          Type = "simple";
          ExecStart = "${gamemode}/bin/gamemoded";
          Restart = "always";
        };
      };
    };
  };
  
  fileSystems = {
    "/" = {
      device = "/dev/disk/by-label/root";
      fsType = "btrfs";
    };
    "/boot" = {
      device = "/dev/disk/by-label/boot";
      fsType = "vfat";
    };
    "/mnt/Storage" = {
      device = "/dev/disk/by-label/storage";
      fsType = "ext4";
    };
  };
  swapDevices = [ ];
}