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

with lib;

let
  cfg = config.shell.zsh;
in
{
  options.shell.zsh = {
    enable = mkOption {
      type = types.bool;
      default = false;
      description = "Add z shell";
    };
  };
  
  config = mkIf cfg.enable {
    programs.zsh = {
      enable = true;
      enableAutosuggestions = true;
      enableCompletion = true;
      defaultKeymap = "viins";
      dotDir = ".config/zsh";

      history = {
        path = "${config.xdg.dataHome}/zsh/zsh_history";
        expireDuplicatesFirst = true;
        ignorePatterns = [
          "rm *"
          "kill *"
        ];
      };

      oh-my-zsh = {
        enable = true;
        theme = "robbyrussell";
      };

      initExtraFirst = ''
        # nix
        if [ -e $HOME/.nix-profile/etc/profile.d/nix.sh ]; then
          source $HOME/.nix-profile/etc/profile.d/nix.sh;
        fi

        source $HOME/.nix-profile/etc/profile.d/hm-session-vars.sh

        export NIX_PATH=$HOME/.nix-defexpr/channels''${NIX_PATH:+:$NIX_PATH}

        # ghcup
        if [ -f "$HOME/.ghcup/env" ]; then
          source "$HOME/.ghcup/env"
        fi
      '';
    };
  };
}