# Doom Emacs configuration via nix-doom-emacs-unstraightened
# https://github.com/marienz/nix-doom-emacs-unstraightened
{
  config,
  lib,
  pkgs,
  ...
}: let
  cfg = config.programs.doom-emacs;
in {
  # The actual doom-emacs module is imported via the flake's homeModule
  # This file just configures it with our local doom.d directory

  programs.doom-emacs = {
    enable = true;

    # Path to our Doom configuration directory
    # Must be in the Nix store (a path literal, not a string)
    doomDir = ../../doom.d;

    # Where Doom stores local state (cache, etc.)
    # Supports ~ expansion but NOT shell variables like $XDG_DATA_HOME
    doomLocalDir = "~/.local/share/nix-doom";

    # Use emacs-pgtk for better Wayland support on Linux
    # On macOS, falls back to regular emacs
    emacs =
      if pkgs.stdenv.isLinux
      then pkgs.emacs-pgtk
      else pkgs.emacs;

    # Extra packages to make available (tree-sitter grammars, etc.)
    # Tree-sitter grammars are not installed automatically by Doom
    extraPackages = epkgs: [
      epkgs.treesit-grammars.with-all-grammars
      # Add additional Emacs packages from nixpkgs here if needed
      # epkgs.vterm  # Already provided by Doom's :term vterm module
    ];

    # Tools added to Emacs's PATH
    # Defaults to git, ripgrep, and fd - extend if needed
    extraBinPackages = with pkgs; [
      git
      ripgrep
      fd
      # Additional CLI tools for development
      nixfmt-rfc-style # Nix formatting
      shellcheck # Shell script linting
      nodePackages.bash-language-server # Bash LSP
    ];

    # Set to false if you want doom-emacs binary separate from emacs
    # (useful if you want vanilla Emacs alongside Doom)
    provideEmacs = true;

    # Enable experimental fetchTree for more efficient package fetching
    # May help with "Cannot find Git revision" errors on newer Nix versions
    # experimentalFetchTree = true;
  };

  # Emacs daemon service (optional - uncomment to enable)
  # When programs.doom-emacs.provideEmacs = true, this uses Doom Emacs
  # services.emacs = {
  #   enable = true;
  #   defaultEditor = true;
  # };

  # Ensure doom directories exist
  home.file.".local/share/nix-doom/.keep".text = "";

  # Shell aliases for Doom Emacs
  programs.fish.shellAbbrs = lib.mkIf config.programs.fish.enable {
    em = "emacsclient -c -a emacs";
    et = "emacsclient -t -a 'emacs -nw'";
  };

  programs.zsh.shellAliases = lib.mkIf config.programs.zsh.enable {
    em = "emacsclient -c -a emacs";
    et = "emacsclient -t -a 'emacs -nw'";
  };

  programs.bash.shellAliases = lib.mkIf config.programs.bash.enable {
    em = "emacsclient -c -a emacs";
    et = "emacsclient -t -a 'emacs -nw'";
  };
}