{ system ? builtins.currentSystem,
  config ? {},
  pkgs ? import ../.. { inherit system config; }
}:

with import ../lib/testing-python.nix { inherit system pkgs; };

let

  makeZfsTest =
    { kernelPackages
    , enableSystemdStage1 ? false
    , zfsPackage
    , extraTest ? ""
    }:
    makeTest {
      name = zfsPackage.kernelModuleAttribute;
      meta = with pkgs.lib.maintainers; {
        maintainers = [ elvishjerricco ];
      };

      nodes.machine = { config, pkgs, lib, ... }:
        let
          usersharePath = "/var/lib/samba/usershares";
        in {
        virtualisation = {
          emptyDiskImages = [ 4096 4096 ];
          useBootLoader = true;
          useEFIBoot = true;
        };
        boot.loader.systemd-boot.enable = true;
        boot.loader.timeout = 0;
        boot.loader.efi.canTouchEfiVariables = true;
        networking.hostId = "deadbeef";
        boot.kernelPackages = kernelPackages;
        boot.zfs.package = zfsPackage;
        boot.supportedFilesystems = [ "zfs" ];
        boot.initrd.systemd.enable = enableSystemdStage1;

        environment.systemPackages = [ pkgs.parted ];

        # /dev/disk/by-id doesn't get populated in the NixOS test framework
        boot.zfs.devNodes = "/dev/disk/by-uuid";

        specialisation.samba.configuration = {
          services.samba = {
            enable = true;
            settings.global = {
              "registry shares" = true;
              "usershare path" = "${usersharePath}";
              "usershare allow guests" = true;
              "usershare max shares" = "100";
              "usershare owner only" = false;
            };
          };
          systemd.services.samba-smbd.serviceConfig.ExecStartPre =
            "${pkgs.coreutils}/bin/mkdir -m +t -p ${usersharePath}";
          virtualisation.fileSystems = {
            "/tmp/mnt" = {
              device = "rpool/root";
              fsType = "zfs";
            };
          };
        };

        specialisation.encryption.configuration = {
          boot.zfs.requestEncryptionCredentials = [ "automatic" ];
          virtualisation.fileSystems."/automatic" = {
            device = "automatic";
            fsType = "zfs";
          };
          virtualisation.fileSystems."/manual" = {
            device = "manual";
            fsType = "zfs";
          };
          virtualisation.fileSystems."/manual/encrypted" = {
            device = "manual/encrypted";
            fsType = "zfs";
            options = [ "noauto" ];
          };
          virtualisation.fileSystems."/manual/httpkey" = {
            device = "manual/httpkey";
            fsType = "zfs";
            options = [ "noauto" ];
          };
        };

        specialisation.forcepool.configuration = {
          systemd.services.zfs-import-forcepool.wantedBy = lib.mkVMOverride [ "forcepool.mount" ];
          systemd.targets.zfs.wantedBy = lib.mkVMOverride [];
          boot.zfs.forceImportAll = true;
          virtualisation.fileSystems."/forcepool" = {
            device = "forcepool";
            fsType = "zfs";
            options = [ "noauto" ];
          };
        };

        services.nginx = {
          enable = true;
          virtualHosts = {
            localhost = {
              locations = {
                "/zfskey" = {
                  return = ''200 "httpkeyabc"'';
                };
              };
            };
          };
        };
      };

      testScript = ''
        machine.wait_for_unit("multi-user.target")
        machine.succeed(
            "zpool status",
            "parted --script /dev/vdb mklabel msdos",
            "parted --script /dev/vdb -- mkpart primary 1024M -1s",
            "parted --script /dev/vdc mklabel msdos",
            "parted --script /dev/vdc -- mkpart primary 1024M -1s",
        )

        with subtest("sharesmb works"):
            machine.succeed(
                "zpool create rpool /dev/vdb1",
                "zfs create -o mountpoint=legacy rpool/root",
                # shared datasets cannot have legacy mountpoint
                "zfs create rpool/shared_smb",
                "bootctl set-default nixos-generation-1-specialisation-samba.conf",
                "sync",
            )
            machine.crash()
            machine.wait_for_unit("multi-user.target")
            machine.succeed("zfs set sharesmb=on rpool/shared_smb")
            machine.succeed(
                "smbclient -gNL localhost | grep rpool_shared_smb",
                "umount /tmp/mnt",
                "zpool destroy rpool",
            )

        with subtest("encryption works"):
            machine.succeed(
                'echo password | zpool create -O mountpoint=legacy '
                + "-O encryption=aes-256-gcm -O keyformat=passphrase automatic /dev/vdb1",
                "zpool create -O mountpoint=legacy manual /dev/vdc1",
                "echo otherpass | zfs create "
                + "-o encryption=aes-256-gcm -o keyformat=passphrase manual/encrypted",
                "zfs create -o encryption=aes-256-gcm -o keyformat=passphrase "
                + "-o keylocation=http://localhost/zfskey manual/httpkey",
                "bootctl set-default nixos-generation-1-specialisation-encryption.conf",
                "sync",
                "zpool export automatic",
                "zpool export manual",
            )
            machine.crash()
            machine.start()
            machine.wait_for_console_text("Starting password query on")
            machine.send_console("password\n")
            machine.wait_for_unit("multi-user.target")
            machine.succeed(
                "zfs get -Ho value keystatus manual/encrypted | grep -Fx unavailable",
                "echo otherpass | zfs load-key manual/encrypted",
                "systemctl start manual-encrypted.mount",
                "zfs load-key manual/httpkey",
                "systemctl start manual-httpkey.mount",
                "umount /automatic /manual/encrypted /manual/httpkey /manual",
                "zpool destroy automatic",
                "zpool destroy manual",
            )

        with subtest("boot.zfs.forceImportAll works"):
            machine.succeed(
                "rm /etc/hostid",
                "zgenhostid deadcafe",
                "zpool create forcepool /dev/vdb1 -O mountpoint=legacy",
                "bootctl set-default nixos-generation-1-specialisation-forcepool.conf",
                "rm /etc/hostid",
                "sync",
            )
            machine.crash()
            machine.wait_for_unit("multi-user.target")
            machine.fail("zpool import forcepool")
            machine.succeed(
                "systemctl start forcepool.mount",
                "mount | grep forcepool",
            )
      '' + extraTest;

    };


in {

  # maintainer: @raitobezarius
  series_2_1 = makeZfsTest {
    zfsPackage = pkgs.zfs_2_1;
    kernelPackages = pkgs.linuxPackages;
  };

  series_2_2 = makeZfsTest {
    zfsPackage = pkgs.zfs_2_2;
    kernelPackages = pkgs.linuxPackages;
  };

  unstable = makeZfsTest rec {
    zfsPackage = pkgs.zfs_unstable;
    kernelPackages = pkgs.linuxPackages;
  };

  unstableWithSystemdStage1 = makeZfsTest rec {
    zfsPackage = pkgs.zfs_unstable;
    kernelPackages = pkgs.linuxPackages;
    enableSystemdStage1 = true;
  };

  installerBoot = (import ./installer.nix { inherit system; }).separateBootZfs;
  installer = (import ./installer.nix { inherit system; }).zfsroot;

  expand-partitions = makeTest {
    name = "multi-disk-zfs";
    nodes = {
      machine = { pkgs, ... }: {
        environment.systemPackages = [ pkgs.parted ];
        boot.supportedFilesystems = [ "zfs" ];
        networking.hostId = "00000000";

        virtualisation = {
          emptyDiskImages = [ 20480 20480 20480 20480 20480 20480 ];
        };

        specialisation.resize.configuration = {
          services.zfs.expandOnBoot = [ "tank" ];
        };
      };
    };

    testScript = { nodes, ... }:
      ''
        start_all()
        machine.wait_for_unit("default.target")
        print(machine.succeed('mount'))

        print(machine.succeed('parted --script /dev/vdb -- mklabel gpt'))
        print(machine.succeed('parted --script /dev/vdb -- mkpart primary 1M 70M'))

        print(machine.succeed('parted --script /dev/vdc -- mklabel gpt'))
        print(machine.succeed('parted --script /dev/vdc -- mkpart primary 1M 70M'))

        print(machine.succeed('zpool create tank mirror /dev/vdb1 /dev/vdc1 mirror /dev/vdd /dev/vde mirror /dev/vdf /dev/vdg'))
        print(machine.succeed('zpool list -v'))
        print(machine.succeed('mount'))
        start_size = int(machine.succeed('df -k --output=size /tank | tail -n1').strip())

        print(machine.succeed("/run/current-system/specialisation/resize/bin/switch-to-configuration test >&2"))
        machine.wait_for_unit("zpool-expand-pools.service")
        machine.wait_for_unit("zpool-expand@tank.service")

        print(machine.succeed('zpool list -v'))
        new_size = int(machine.succeed('df -k --output=size /tank | tail -n1').strip())

        if (new_size - start_size) > 20000000:
          print("Disk grew appropriately.")
        else:
          print(f"Disk went from {start_size} to {new_size}, which doesn't seem right.")
          exit(1)
      '';
  };
}
