"use strict";

// const nijs = require("nijs");
const path = require("path");

function nixEscapeString(string) {
	return string
		.replace(/\\/g, "\\\\")
		.replace(/"/g, "\\\"");
}

module.exports = function generateEnvironment({ targetBinary, packages, binaryName }) {	
	// return nijs.jsToNix("foo", true);

	// return nijs.jsToNix(function (args) {
	// 	return args.pkgs().buildFHSUserEnv({
	// 		name: path.basename(targetBinary)
	// 	});
	// }, true);

	return `
		{ pkgs ? import <nixpkgs> {} }:
		pkgs.buildFHSUserEnv {
			name = "${nixEscapeString(binaryName)}";
			
			targetPkgs = pkgs: with pkgs; [
				${packages.join(" ")}
			];
			
			runScript = pkgs.writeScript "run-${nixEscapeString(binaryName)}" ''
				cmd="$1"
				shift
				exec -- "${nixEscapeString(targetBinary)}" "$@"
			'';
		}
	`;
};