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

let
  cfg = config.ptw.programs.emacs;

  weyland-yutani = pkgs.fetchFromGitHub {
    owner = "jstaursky";
    repo = "weyland-yutani-theme";
    rev = "e89a63a62e071180c9cdd9067679fadc3f7bf796";
    sha256 = "0gxlz9b7fvbjkqxsyb4l75g7jsxyms0i1vpnb6y499hl115akcaz";
  };
in {
  options.ptw.programs.emacs = {
    enable = lib.mkEnableOption "Configure emacs";
  };

  config = lib.mkIf cfg.enable {
    environment.systemPackages = with pkgs; [ emacsPgtkGcc ];
    services.emacs.package = pkgs.emacsPgtkGcc;

    home-manager.users."${config.ptw.system.singleUser}" = {
      home.file = {
        ".emacs".source = ./dotemacs;
        ".emacs.d/mu4e.el".source = ./mu4e.el;
        ".emacs.d/themes/weyland-yutani-theme.el".source = "${weyland-yutani}/weyland-yutani-theme.el";
      };
      programs.emacs = {
        enable = true;
        extraPackages = epkgs: with epkgs; [
          use-package
          rainbow-delimiters
          hl-todo
          nlinum
          ivy
          evil
          evil-collection
          highlight-parentheses
          smartparens
          undo-tree
          perspective
          pkgs.mu
          org
          org-present
          graphviz-dot-mode
          tide
          nix-mode
          go-mode
          json-mode
          rust-mode
          yaml-mode
          lsp-mode lsp-treemacs flycheck company
          dart-mode lsp-dart
        ];
      };
    };
  };
}