# Legacy storage configuration for defiant
# This file manually defines ZFS datasets matching the main branch structure
# to allow incremental migration to the new storage module.
#
# Datasets from main branch:
# - local/                    - ephemeral parent
# - local/home/leyla          - ephemeral user home
# - local/system/nix          - nix store
# - local/system/root         - root filesystem (rolled back on boot)
# - local/system/sops         - sops age key
# - persist/                  - persistent parent
# - persist/home/leyla        - persistent user home
# - persist/system/jellyfin   - jellyfin media
# - persist/system/qbittorrent - qbittorrent media
# - persist/system/root       - persistent root data
# - persist/system/var/log    - log persistence
{lib, ...}: {
  # Manually define ZFS datasets matching main's structure
  storage.zfs.datasets = {
    # Ephemeral datasets (local/)
    "local" = {
      type = "zfs_fs";
      mount = null;
    };
    "local/home/leyla" = {
      type = "zfs_fs";
      mount = "/home/leyla";
      snapshot = {
        blankSnapshot = true;
      };
    };
    "local/system/nix" = {
      type = "zfs_fs";
      mount = "/nix";
      atime = "off";
      relatime = "off";
      snapshot = {
        autoSnapshot = false;
      };
    };
    "local/system/root" = {
      type = "zfs_fs";
      mount = "/";
      snapshot = {
        blankSnapshot = true;
      };
    };
    "local/system/sops" = {
      type = "zfs_fs";
      mount = "/persist/sops";
    };

    # Persistent datasets (persist/)
    "persist" = {
      type = "zfs_fs";
      mount = null;
    };
    "persist/home/leyla" = {
      type = "zfs_fs";
      mount = "/persist/home/leyla";
      snapshot = {
        autoSnapshot = true;
      };
    };
    "persist/system/jellyfin" = {
      type = "zfs_fs";
      mount = "/persist/system/jellyfin";
      atime = "off";
      relatime = "off";
    };
    "persist/system/qbittorrent" = {
      type = "zfs_fs";
      mount = "/persist/system/qbittorrent";
      atime = "off";
      relatime = "off";
    };
    "persist/system/root" = {
      type = "zfs_fs";
      mount = "/persist/system/root";
      snapshot = {
        autoSnapshot = true;
      };
    };
    "persist/system/var/log" = {
      type = "zfs_fs";
      mount = "/persist/system/var/log";
    };
  };

  # Boot commands to rollback ephemeral root on boot
  boot.initrd.postResumeCommands = lib.mkAfter ''
    zfs rollback -r rpool/local/system/root@blank
  '';

  # FileSystems needed for boot
  fileSystems = {
    "/".neededForBoot = true;
    "/persist/system/root".neededForBoot = true;
    "/persist/system/var/log".neededForBoot = true;
    "/persist/system/jellyfin".neededForBoot = true;
    "/persist/system/qbittorrent".neededForBoot = true;
  };
}