{ config, lib, ... }:

{
  options.tools.zsh = {
    enable = lib.mkEnableOption "Enables zsh.";
  };

  config =
    let
      nixCommandWrappers = builtins.readFile ./nix-aliases.sh;
    in
    lib.mkIf config.tools.zsh.enable {
      programs.zsh = {
        enable = true;
        dotDir = "${config.xdg.configHome}/zsh";
        history.path = "${config.xdg.cacheHome}/zsh/history";
        enableCompletion = true;
        initContent = ''
          setopt PROMPT_SUBST

          autoload -U colors && colors

          bindkey "^[[3~" delete-char
          bindkey "^?" backward-delete-char
          ${nixCommandWrappers}
        '';
      };

      programs.bash.initExtra = lib.mkIf config.programs.bash.enable (lib.mkAfter nixCommandWrappers);

      home.sessionVariables.SHELL = "${config.programs.zsh.package}/bin/zsh";
    };
}