{ config, pkgs, lib, ... }:
with builtins // lib;
let
  cfg = config.kobo;
  ini = pkgs.formats.ini {};
in {
  options.kobo = {
    enable = mkEnableOption "main configurations";

    path = mkOption {
      type = types.str;
      readOnly = true;
      internal = true;
      default = ".kobo/Kobo";
    };

    devicePath = mkOption {
      type = types.str;
      readOnly = true;
      internal = true;
      deafault = "/mnt/onboard/${cfg.path}";
    };

    file = mkOption {
      default = {};
      type = types.attrsOf (types.submodule (pkgs.callPackage ../lib/file-type.nix {}));
    };

    _allFiles = mkOption {
      type = types.package;
      readOnly = true;
      internal = true;
      default = (pkgs.callPackage ../lib/merge-files.nix {}) (attrValues cfg.file);
    };

    conf = mkOption {
      type = ini.type;
      default = {};
      description = "https://wiki.mobileread.com/wiki/Kobo_Configuration_Options";
    };
  };

  config = {
    kobo = {
      conf = {
        FeatureSettings.ExcludeSyncFolders = ''(\.(?!kobo|adobe).+|([^.][^/]*/)+\..+)'';
        ApplicationPreferences.QuickTourShown = true;
      };

      file = mkIf (cfg.conf != {}) {
        "Kobo eReader.conf".text = generators.toINI {} cfg.conf;
      };
    };
  };
}