inputs:
let
  system = "x86_64-linux";
  hostname = "morpheus";
  swapUUID = "93bdadfc-961a-4ea6-aef0-d3cd50847f0b";
  overlay-unstable = final: prev: {
    unstable = inputs.nixpkgs-unstable.legacyPackages.${prev.system};
  };
in
inputs.nixpkgs.lib.nixosSystem {
  inherit system;
  modules = [
    ({ config, pkgs, ... } : {
      system.stateVersion = "22.05";
      nixpkgs.overlays = [ overlay-unstable ];
    })
    (import ./common.nix inputs)
    (import ./sway.nix inputs)
    (import ./morpheus/btrbk.nix inputs)
    (import ./dev.nix inputs)
    (import ./entertainment.nix inputs)
    (import ./office.nix inputs)
    ({ pkgs, lib, ... }: {
      system.autoUpgrade = {
        enable = false;
        flake = inputs.self.outPath;
        flags = [
          "--update-input"
          "nixpkgs"
          "--update-input"
          "nixpkgs-unstable"
          "--update-input"
          "home-manager"
          "--update-input"
          "flake-utils"
          "-L" # print build logs
        ];
        allowReboot = false;
      };

      networking = {
        hostName = hostname;
        interfaces.enp1s0.useDHCP = true;
        interfaces.wlp2s0.useDHCP = true;
      };
      services = {
        # enable touchpad support
        libinput.enable = true;
        blueman.enable = true;
      };
      users.users.me = {
        isNormalUser = true;
        createHome = true;
        extraGroups = [
          "adbusers"
          "audio"
          "davfs2"
          "disk"
          "docker"
          "libvirtd" # virt-manager
          "networkmanager"
          "plugdev"
          "podman"
          "users"
          "uucp"
          "vboxusers"
          "video"
          "wheel"
        ];
        shell = pkgs.zsh;
      };
      boot = {
        initrd = {
          #availableKernelModules = [ "xhci_pci" "ehci_pci" "ahci" "nvme" "usbhid" "usb_storage" "sd_mod" ];
          availableKernelModules = [ "nvme" "xhci_pci" "usb_storage" "sd_mod" ];
          kernelModules = [ ];
          luks.devices."system" = {
            device = "/dev/disk/by-uuid/06549d22-b96c-44f2-bb27-45200d5feda5";
            # better SSD performance
            # https://wiki.archlinux.org/title/Dm-crypt/Specialties#Disable_workqueue_for_increased_solid_state_drive_(SSD)_performance
            bypassWorkqueues = true;
          };
        };
        kernelModules = [ "kvm-amd" ];
        # use latest kernel
        kernelPackages = pkgs.linuxPackages_latest;
        kernelParams = [
          /* enable hibernation with swapfile */
          /* https://wiki.archlinux.org/title/Power_management/Suspend_and_hibernate#Hibernation_into_swap_file */
          ("resume=UUID=" + swapUUID)
/* sudo filefrag -v /swap/swapfile | awk '$1=="0:" {print substr($4, 1, length($4)-2)}' */
          "resume_offset=269568"
        ];
        kernel.sysctl = {
          # function keys on keychron keyboard won't work otherwise
          "module.hid_apple.parameters.fnmode" = "2";
        };
        # Use the systemd-boot EFI boot loader.
        loader = {
          systemd-boot.enable = true;
          efi = {
            canTouchEfiVariables = true;
            efiSysMountPoint = "/boot/efi";
          };
        };
        # mount tmp as tmpfs
        tmp.useTmpfs = true;
        # Enable NTFS support
        supportedFilesystems = [ "ntfs" ];
      };

      # btrf autoscrub
      services.btrfs.autoScrub = {
        enable = true;
        # multiple subvolumes of the same fs are mounted. only scrub '/' to prevent multiple runs
        fileSystems = [ "/" ];
      };

      fileSystems."/" =
        { device = "/dev/disk/by-uuid/93bdadfc-961a-4ea6-aef0-d3cd50847f0b";
          fsType = "btrfs";
          options = [ "subvol=root" "compress=zstd" ];
        };

      fileSystems."/boot/efi" =
        { device = "/dev/disk/by-uuid/4CD4-D5AB";
          fsType = "vfat";
        };

      fileSystems."/nix" =
        { device = "/dev/disk/by-uuid/93bdadfc-961a-4ea6-aef0-d3cd50847f0b";
          fsType = "btrfs";
          options = [ "subvol=nix" "compress=zstd" "noatime" ];
        };

      fileSystems."/home" =
        { device = "/dev/disk/by-uuid/93bdadfc-961a-4ea6-aef0-d3cd50847f0b";
          fsType = "btrfs";
          options = [ "subvol=home" "compress=zstd" ];
        };

      fileSystems."/home/me/media" =
        { device = "/dev/disk/by-uuid/93bdadfc-961a-4ea6-aef0-d3cd50847f0b";
          fsType = "btrfs";
          options = [ "subvol=home/me/media" "compress=zstd" ];
        };

      fileSystems."/swap" =
        { device = "/dev/disk/by-uuid/" + swapUUID;
          fsType = "btrfs";
          options = [ "subvol=swap" "noatime" ];
        };

      swapDevices = [
        { device = "/swap/swapfile"; }
      ];

      powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";

      hardware = {
        bluetooth.enable = true;
        #opengl = {
          #extraPackages = with pkgs; [
            #rocm-opencl-icd
            #rocm-opencl-runtime
          #];
        #};
      };
    })
    inputs.home-manager.nixosModules.home-manager
    {
      home-manager = {
        useGlobalPkgs = true;
        useUserPackages = true;
        extraSpecialArgs = {
          inherit inputs;
          inherit system;
          hostname = hostname;
        };
        users.me = import ../users/me.nix;
      };
    }
  ];
}