{ config, pkgs, lib, ... }:

with lib;

let

  unstable = import <nixpkgs-unstable> { };

  espeak = unstable.espeak;

  # can't use bash aliases because programms will not pic it up
  en_espeak = pkgs.writeShellScriptBin "en-speak" ''
    exec ${espeak}/bin/espeak \
      -v en\
      -s 145 \
      -p 23 \
      "$@"
  '';

  # read from copyq
  en_read = pkgs.writeShellScriptBin "en-read" ''
    exec ${pkgs.copyq}/bin/copyq read 0 | ${en_espeak}/bin/en-speak
  '';

  # can't use bash aliases because programms will not pic it up
  de_espeak = pkgs.writeShellScriptBin "de-speak" ''
    exec ${espeak}/bin/espeak \
      -v de\
      -s 143 \
      -p 20 \
      "$@"
  '';

  # read from copyq
  de_read = pkgs.writeShellScriptBin "de-read" ''
    exec ${pkgs.copyq}/bin/copyq read 0 | ${de_espeak}/bin/de-speak
  '';

  cfg = config.programs.custom.espeak;

in {

  options.programs.custom.espeak.enable =
    mkEnableOption "enable espeak scripts";

  config = mkIf cfg.enable {

    environment.systemPackages = [ espeak en_espeak en_read de_espeak de_read ];

  };
}