{ self
, utils
, nixpkgs
, nixpkgs-unstable
, nixos-generators
, sops-nix
, microvm
, ...
} @inputs:

# filter i686-liux from defaultSystem to run nix flake check successfully
let filter_system = name: if name == utils.lib.system.i686-linux then false else true;
in (utils.lib.eachSystem (builtins.filter filter_system utils.lib.defaultSystems) ( system:
  let
    pkgs-unstable = nixpkgs-unstable.legacyPackages."${system}";
    pkgs = nixpkgs.legacyPackages."${system}";

    vmMicroVMOverwrites = options: {
      microvm = {
        mem = pkgs.lib.mkForce 4096;
        hypervisor = pkgs.lib.mkForce "qemu";
        socket = pkgs.lib.mkForce null;
        shares = pkgs.lib.mkForce [
          {
            tag = "ro-store";
            source = "/nix/store";
            mountPoint = "/nix/.ro-store";
          }
        ];
        interfaces = pkgs.lib.mkIf (!options.withNetworking) (pkgs.lib.mkForce [{
          type = "user";
          id = "eth0";
          mac = "02:23:de:ad:be:ef";
        }]);
      };

      boot.initrd.network.ssh.enable = pkgs.lib.mkForce false;
      boot.isContainer = pkgs.lib.mkForce false;
      users.users.root.password = "";
      fileSystems."/".fsType = pkgs.lib.mkForce "tmpfs";
      services.getty.helpLine = ''
        Log in as "root" with an empty password.
        Use "reboot" to shut qemu down.
      '';
    };

    vmSopsOverwrites = host: {
      sops.defaultSopsFile = pkgs.lib.mkForce ./machines/${host}/dummy.yaml;

      environment.etc = {
        devHostKey = {
          source = ./machines/secrets/devkey_ed25519;
          mode = "0600";
        };
      };

      services.openssh.hostKeys = [{
        path = "/etc/devHostKey";
        type = "ed25519";
      }];
    };

    buildVM = host: networking: sopsDummy: (self.nixosConfigurations.${host}.extendModules {
        modules = [
          (vmMicroVMOverwrites { withNetworking = networking; })
          (if sopsDummy then (vmSopsOverwrites host) else {})
        ] ++ pkgs.lib.optionals (! self.nixosConfigurations.${host}.config ? microvm) [
          microvm.nixosModules.microvm
        ];
      }).config.microvm.declaredRunner;
  in
  {
    devShells.default =
    let
      sops = sops-nix.packages."${pkgs.system}";
      microvmpkg = microvm.packages."${pkgs.system}";
      installed = builtins.attrNames self.legacyPackages."${pkgs.system}".scripts;
    in
    pkgs.mkShell {
      sopsPGPKeyDirs = [
        "./machines/secrets/keys/hosts"
        "./machines/secrets/keys/users"
      ];
    
      nativeBuildInputs = [
        sops.ssh-to-pgp
        sops.sops-import-keys-hook
        sops.sops-init-gpg-key
        pkgs.sops
        pkgs.age
        pkgs.python310Packages.grip
        pkgs.mdbook
        microvmpkg.microvm
      ];

      packages = builtins.map (pkgName: self.legacyPackages."${pkgs.system}".scripts.${pkgName}) installed;
      shellHook = ''echo "Available scripts: ${builtins.concatStringsSep " " installed}"'';
    };

    legacyPackages = {
      scripts.remote-install = pkgs.writeShellScriptBin "remote-install" (builtins.readFile ./scripts/remote-install-encrypt.sh);
      scripts.boot-unlock = pkgs.writeShellScriptBin "boot-unlock" (builtins.readFile ./scripts/unlock-boot.sh);
      scripts.run-vm = self.packages.${system}.run-vm;
    };

    vmBuilder = buildVM;

    packages = {
      docs = pkgs.stdenv.mkDerivation {
        name = "malobeo-docs";
        phases = [ "buildPhase" ];
        buildInputs = [ pkgs.mdbook ];
      
        inputs = pkgs.lib.sourceFilesBySuffices ./doc/. [ ".md" ".toml" ];
      
        buildPhase = ''
          dest=$out/share/doc
          mkdir -p $dest
          cp -r --no-preserve=all $inputs/* ./
          mdbook build
          ls
          cp -r ./book/* $dest
        '';
      };

      run-vm = pkgs.writeShellScriptBin "run-vm" ''
        usage() {
            echo "Usage: run-vm <hostname> [--networking] [--dummy-secrets]"
            echo "ATTENTION: This script must be run from the flakes root directory"
            echo "--networking setup interfaces. requires root and hostbridge enabled on the host"
            echo "--dummy-secrets deploy dummy sops secrets"
            exit 1
        }
        
        # check at least one arg was given
        if [ "$#" -lt 1 ]; then
            usage
        fi
        
        HOSTNAME=$1
        
        # Optionale Argumente
        NETWORK=false
        DUMMY_SECRETS=false
        
        # check argws
        shift
        while [[ "$#" -gt 0 ]]; do
            case $1 in
                --networking) NETWORK=true ;;
                --dummy-secrets) DUMMY_SECRETS=true ;;
                *) echo "Unknown argument: $1"; usage ;;
            esac
            shift
        done
        echo "starting host $HOSTNAME"
        echo "enable networking: $NETWORK"
        echo "deploy dummy secrets: $DUMMY_SECRETS"
        
        ${pkgs.nix}/bin/nix run --impure --expr "((builtins.getFlake \"$(pwd)\").vmBuilder.x86_64-linux \"$HOSTNAME\" $NETWORK $DUMMY_SECRETS)"
      '';
    };

    apps = {
      docs = {
        type = "app";
        program = builtins.toString (pkgs.writeShellScript "docs" ''
          ${pkgs.mdbook}/bin/mdbook serve --open ./doc
        '');
      };

      run-vm = {
        type = "app";
        program = self.packages.${system}.run-vm;
      };
    };

  })) // {
    nixosConfigurations = import ./machines/configuration.nix (inputs // {
      inherit inputs;
      self = self;
    });

    nixosModules.malobeo = {
      host.imports = [ ./machines/durruti/host_config.nix ];
      microvm.imports = [ ./machines/modules/malobeo/microvm_host.nix ];
      vpn.imports = [ ./machines/modules/malobeo/wireguard.nix ];
      initssh.imports = [ ./machines/modules/malobeo/initssh.nix ];
      disko.imports = [ ./machines/modules/disko ];
    };

    hydraJobs = nixpkgs.lib.mapAttrs (_: nixpkgs.lib.hydraJob) (
      let
        getBuildEntry = name: nixosSystem:
          if (nixpkgs.lib.hasPrefix "sdImage" name) then
              nixosSystem.config.system.build.sdImage
          else
            nixosSystem.config.system.build.toplevel;
      in
      nixpkgs.lib.mapAttrs getBuildEntry self.nixosConfigurations

      );
}