{
  config,
  lib,
  pkgs,
  ...
}:
let
  inherit (lib) mkIf;

  cfg = config.programs.scmpuff;
in
{
  meta.maintainers = [ lib.maintainers.cpcloud ];

  options.programs.scmpuff = {
    enable = lib.mkEnableOption ''
      scmpuff, a command line tool that allows you to work quicker with Git by
      substituting numeric shortcuts for files'';

    package = lib.mkPackageOption pkgs "scmpuff" { };

    enableBashIntegration = lib.hm.shell.mkBashIntegrationOption { inherit config; };

    enableFishIntegration = lib.hm.shell.mkFishIntegrationOption { inherit config; };

    enableZshIntegration = lib.hm.shell.mkZshIntegrationOption { inherit config; };

    enableAliases = lib.mkOption {
      default = true;
      type = lib.types.bool;
      description = ''
        Whether to enable aliases (e.g. gs, ga, gd, gco).
      '';
    };
  };

  config = mkIf cfg.enable (
    let
      mkArgs =
        shell:
        lib.concatStringsSep " " (
          [ "--shell=${shell}" ] ++ lib.optional (!cfg.enableAliases) "--aliases=false"
        );
    in
    {
      home.packages = [ cfg.package ];

      programs.bash.initExtra = mkIf cfg.enableBashIntegration ''
        eval "$(${cfg.package}/bin/scmpuff init ${mkArgs "bash"})"
      '';

      programs.zsh.initContent = mkIf cfg.enableZshIntegration ''
        eval "$(${cfg.package}/bin/scmpuff init ${mkArgs "zsh"})"
      '';

      programs.fish.interactiveShellInit = mkIf cfg.enableFishIntegration (
        lib.mkAfter ''
          ${cfg.package}/bin/scmpuff init ${mkArgs "fish"} | source
        ''
      );
    }
  );
}