# Build ISO image
#   doas nix run github:nix-community/nixos-generators -- --flake .#odo --format iso
{
  description = "My system configuration";

  inputs = {
    impermanence.url = "github:nix-community/impermanence";
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11";
    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
    nixpkgs-b93b4e9b5.url = "github:NixOS/nixpkgs/b93b4e9b527904aadf52dba6ca35efde2067cbd4";
    home-manager.url = "github:nix-community/home-manager/release-24.11";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";
    emacs-overlay.url = "github:nix-community/emacs-overlay/da2f552d133497abd434006e0cae996c0a282394";
    emacs-overlay.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs = { self, nixpkgs, nixpkgs-unstable, nixpkgs-b93b4e9b5, impermanence, home-manager, emacs-overlay, ... }@inputs: let
    base-system = {};
    odoqemu = nixpkgs.lib.nixosSystem rec {
      system = "x86_64-linux";
      specialArgs = {
        pkgs-b93b4e9b5 = import nixpkgs-b93b4e9b5 {
          inherit system;
          # config.allowUnfree = true;
        };
        pkgs-unstable = import nixpkgs-unstable {
          inherit system;
          # config.allowUnfree = true;
        };
      };
      modules = [
        impermanence.nixosModules.impermanence
        home-manager.nixosModules.home-manager
        {
          home-manager.useGlobalPkgs = true;
          home-manager.useUserPackages = true;
        }
        ./configuration.nix
        ({lib, ...}: {
          imports = [ <nixpkgs/nixos/modules/virtualisation/qemu-vm.nix> ];
          virtualisation.qemu.options = [
            "-device virtio-vga"
          ];
          virtualisation.vmVariant = {
            # following configuration is added only when building VM with build-vm
            virtualisation = {
              memorySize = 2048; # Use 2048MiB memory.
              cores = 3;
              graphics = false;
            };
          };
          networking.dhcpcd.enable = lib.mkForce true;
          networking.useDHCP = lib.mkForce true;
          boot.loader.efi.canTouchEfiVariables = lib.mkForce true;
          # doas nixos-rebuild build-vm --flake .#odoqemu
          #./result/bin/run-nixos-vm
        })
      ];
    };
    odo = nixpkgs.lib.nixosSystem rec {
      system = "x86_64-linux";
      specialArgs = {
        pkgs-b93b4e9b5 = import nixpkgs-b93b4e9b5 {
          inherit system;
          # config.allowUnfree = true;
        };
        pkgs-unstable = import nixpkgs-unstable {
          inherit system;
          # config.allowUnfree = true;
        };
      };
      modules = [
        impermanence.nixosModules.impermanence
        home-manager.nixosModules.home-manager
        {
          home-manager.useGlobalPkgs = true;
          home-manager.useUserPackages = true;
        }
        ./configuration.nix
      ];
    };
  in
    {
      # doas nix build --extra-experimental-features nix-command --extra-experimental-features flakes .#vms.odo
      # ./result/bin/run-nixos-vim
      vms.odo = odoqemu.config.system.build.vm;
      odoiso = odo.config.system.build.isoImage;
      nixosConfigurations.odo = odo;
      nixosConfigurations.odovm = nixpkgs.lib.nixosSystem rec {
        system = "x86_64-linux";
        specialArgs = {
          pkgs-b93b4e9b5 = import nixpkgs-b93b4e9b5 {
            inherit system;
            # config.allowUnfree = true;
          };
          pkgs-unstable = import nixpkgs-unstable {
            inherit system;
            # config.allowUnfree = true;
          };
        };
        modules = [
          impermanence.nixosModules.impermanence
          home-manager.nixosModules.home-manager
          {
            home-manager.useGlobalPkgs = true;
            home-manager.useUserPackages = true;
          }
          ./configuration.nix
          ({lib, ...}: {
            networking.dhcpcd.enable = lib.mkForce true;
            networking.useDHCP = lib.mkForce true;
            boot.loader.efi.canTouchEfiVariables = lib.mkForce true;
          })
        ];
      };
    };
}