# Personal configuration on storage solution
{ pkgs, config, lib, ... }: {
  environment.systemPackages = [
    pkgs.s3fs
    pkgs.cifs-utils
  ];

  # Sadly, autofs uses systemd, so we can't put it in home-manager
  # HACK: need to store secret somewhere so that root can access this
  # because autofs may run as root for now, we enforce putting the secret in this monorepo
  # TODO: make this configuration nix-less to show that it's 100% data
  services.autofs =
    let
      # confToBackendArg {lol="what"; empty=""; name_only=null;} -> "lol=what,empty=,name_only"
      # TODO: change null -> true/false. This allows overriding & better self-documentation
      confToBackendArg = conf: (lib.concatStringsSep ","
        (lib.mapAttrsToList (name: value: "${name}${lib.optionalString (value != null) "=${value}"}") conf));

      # mount_dest: path ("wow")
      # backend_args: nix attrs representing the arguments to be passed to s3fs 
      #    ({"-fstype" = "fuse"; "use_cache" = "/tmp";})
      # bucket: bucket name (hungtr-hot)
      #     NOTE: s3 custom provider will be provided inside
      #    backend_args, so just put the bucket name here
      #
      #-> "${mount_dest} ${formatted_args} ${s3fs-bin}#${bucket}"
      autofs-s3fs_entry =
        { mount_dest
        , backend_args ? { "-fstype" = "fuse"; }
        , bucket
        }@inputs:
        let
          s3fs-exec = "${pkgs.s3fs}/bin/s3fs";
        in
        "${mount_dest} ${confToBackendArg backend_args} :${s3fs-exec}\#${bucket}";
      personalStorage = [
        # hungtr-hot @ phoenix is broken :)
        # (autofs-s3fs_entry {
        #   mount_dest = "hot";
        #   backend_args = {
        #     "-fstype" = "fuse";
        #     use_cache = "/tmp";
        #     del_cache = null;
        #     allow_other = null;
        #     url = ''"https://f5i0.ph.idrivee2-32.com"'';
        #     # TODO: builtins.readFile requires a Git-controlled file
        #     passwd_file = config.age.secrets.s3fs.path;
        #     dbglevel = "debug"; # enable this for better debugging info in journalctl
        #     uid = "1000"; # default user
        #     gid = "100";  # users
        #     umask="003";  # others read only, fully shared for users group
        #     # _netdev = null; # ignored by s3fs (https://github.com/s3fs-fuse/s3fs-fuse/blob/master/src/s3fs.cpp#L4910)
        #   };
        #   bucket = "hungtr-hot";
        # })
        (autofs-s3fs_entry {
          mount_dest = "garden";
          backend_args = {
            "-fstype" = "fuse";
            use_cache = "/tmp";
            del_cache = null;
            allow_other = null;
            url = "https://v5h5.la11.idrivee2-14.com";
            passwd_file = config.age.secrets."s3fs.digital-garden".path;
            dbglevel = "debug"; # enable this for better debugging info in journalctl
            uid = "1000"; # default user
            gid = "100"; # users
            umask = "003"; # others read only, fully shared for users group
          };
          bucket = "digital-garden";
        })
        (
          let
            args = {
              "-fstype" = "cifs";
              credentials = config.age.secrets._nhitrl_cred.path;
              user = null;
              uid = "1001";
              gid = "100";
              dir_mode = "0777";
              file_mode = "0777";
            };
          in
          "felia_d ${confToBackendArg args} ://felia.coati-celsius.ts.net/d"
        )
        (
          let
            args = {
              "-fstype" = "cifs";
              credentials = config.age.secrets._nhitrl_cred.path;
              user = null;
              uid = "1001";
              gid = "100";
              dir_mode = "0777";
              file_mode = "0777";
            };
          in
          "felia_f ${confToBackendArg args} ://felia.coati-celsius.ts.net/f"
        )
      ];
      persoConf = pkgs.writeText "auto.personal" (builtins.concatStringsSep "\n" personalStorage);
    in
    {
      enable = true;
      # Creates /perso directory with every subdirectory declared by ${personalStorage}
      # as of now (might be stale), /perso/hot is the only mount accessible
      # that is also managed by s3fs
      autoMaster = ''
        /perso file:${persoConf}
      '';
      timeout = 30; # default: 600, 600 seconds (10 mins) of inactivity => unmount
      # debug = true; # writes to more to journalctl
    };
}