# nix run github:nix-community/disko -- --mode create ./disko-config-chungus.nix --dry-run
# nix run github:nix-community/disko -- --mode mount ./disko-config-chungus.nix --dry-run
# nixos-generate-config --root /mnt/
# vim /mnt/configuration.nix
# nixos-install --root /mnt
{ ... }:
let
  raid_disks = {
    "TOSHIBA_1360A003FVGG" = "/dev/disk/by-id/ata-TOSHIBA_MG08ACA16TE_1360A003FVGG";
    "TOSHIBA_1360A00BFVGG" = "/dev/disk/by-id/ata-TOSHIBA_MG08ACA16TE_1360A00BFVGG";
    "TOSHIBA_1360A00VFVGG" = "/dev/disk/by-id/ata-TOSHIBA_MG08ACA16TE_1360A00VFVGG";
    "TOSHIBA_41R0A0EBF57H" = "/dev/disk/by-id/ata-TOSHIBA_MG08ACA16TE_41R0A0EBF57H";
    "TOSHIBA_5120A03WF57H" = "/dev/disk/by-id/ata-TOSHIBA_MG08ACA16TE_5120A03WF57H";
  };
in
{
  disko.devices = {
    disk = {
      root = {
        type = "disk";
        device = "/dev/nvme0n1";
        content = {
          type = "table";
          format = "gpt";
          partitions = [
            {
              name = "ESP";
              start = "0";
              end = "500MiB";
              bootable = true;
              content = {
                type = "filesystem";
                format = "vfat";
                mountpoint = "/boot";
                mountOptions = [
                  "defaults"
                ];
              };
            }
            {
              name = "zfs";
              start = "500MiB";
              end = "100%";
              content = {
                type = "luks";
                name = "root";
                #keyFile = "/tmp/secret.key";
                content = {
                  type = "zfs";
                  pool = "zroot";
                };
              };
            }
          ];
        };
      };
    } // builtins.mapAttrs
      (name: device_path: {
        type = "disk";
        device = device_path;
        content = {
          type = "table";
          format = "gpt";
          partitions = [
            {
              name = "zfs";
              start = "0";
              end = "100%";
              content = {
                type = "luks";
                name = "raid_${name}";
                #keyFile = "/tmp/secret.key";
                content = {
                  type = "zfs";
                  pool = "zraid";
                };
              };
            }
          ];
        };
      }
      )
      raid_disks;

    zpool = {

      zroot = {
        type = "zpool";
        datasets = {
          "root" = {
            type = "zfs_fs";
            mountpoint = "/";
            options.compression = "lz4";
          };
        };
      };

      zraid = {
        type = "zpool";
        mode = "raidz2";
        datasets = {
          "media" = {
            type = "zfs_fs";
            mountpoint = "/media";
            options.compression = "lz4";
          };
          "media/nextcloud" = {
            type = "zfs_fs";
            mountpoint = "/media/nextcloud";
            options = {
              compression = "lz4";
              # question: is that combination of frequency and keep even possible?
              "com.sun:auto-snapshot" = "false";
              "com.sun:auto-snapshot:daily,keep=32" = "true";
              "com.sun:auto-snapshot:montly,keep=48" = "true";
            };
          };
        };
      };

    };
  };
}