{ lib, pkgs, config, ... }:
let
  cfg = config.grimmShared;
  viewer_pkg = pkgs.zathura;
  viewer_def = lib.optionalString cfg.graphical ''pdf_viewer = "${lib.getExe pkgs.zathura}",'';
in
{
  config = with cfg; lib.mkIf (enable && tooling.enable && tooling.lilypond) {
    environment.systemPackages = with pkgs; [
      lilypond-with-fonts
    ] ++ lib.optional graphical viewer_pkg;
    environment.sessionVariables = {
      LYEDITOR = "${lib.getExe pkgs.neovim-remote} -s +:'dr %(file)s | call cursor(%(line)s,%(char)s+1)'";
    };

    grimmShared.sound.midi = true;

    grimmShared.tooling.nvim = {
      extraLuaRC = lib.singleton ''
        require('nvls').setup({
          lilypond = {
            options = {
              ${viewer_def}
            },
          },
          latex = {
            options = {
              ${viewer_def}
            },
          },
          player = {
            options = { 
              fluidsynth_flags = { 
                "/run/current-system/sw/share/soundfonts/FluidR3_GM2-2.sf2"
              }
            }
          }
        })
      '';
    };

    grimmShared.tooling.nvim.plugins = with pkgs.vimPlugins; [
      nvim-lilypond-suite
    ];
  };

  options.grimmShared.tooling.lilypond = lib.mkEnableOption "enable lilypond tooling";

}