{ lib, ... }:

with lib;

{
  options.mbsync = {
    enable = mkEnableOption "synchronization using mbsync";

    flatten = mkOption {
      type = types.nullOr types.str;
      default = null;
      example = ".";
      description = ''
        If set, flattens the hierarchy within the maildir by
        substituting the canonical hierarchy delimiter
        <literal>/</literal> with this value.
      '';
    };

    create = mkOption {
      type = types.enum [ "none" "maildir" "imap" "both" ];
      default = "none";
      example = "maildir";
      description = ''
        Automatically create missing mailboxes within the
        given mail store.
      '';
    };

    remove = mkOption {
      type = types.enum [ "none" "maildir" "imap" "both" ];
      default = "none";
      example = "imap";
      description = ''
        Propagate mailbox deletions to the given mail store.
      '';
    };

    expunge = mkOption {
      type = types.enum [ "none" "maildir" "imap" "both" ];
      default = "none";
      example = "both";
      description = ''
        Permanently remove messages marked for deletion from
        the given mail store.
      '';
    };

    patterns = mkOption {
      type = types.listOf types.str;
      default = [ "*" ];
      description = ''
        Pattern of mailboxes to synchronize.
      '';
    };
  };
}