// ==UserScript==
// @name         NiTwit
// @namespace    http://tampermonkey.net/
// @version      0.1.4
// @description  Show a button on the top to quickly toggle between Twitter and Nitter.net (or any other instance).
// @author       Ap
// @match        *://*.twitter.com/*
// @match        *://*.unofficialbird.com/*
// @grant        none
// @license      MIT
// @downloadURL none
// ==/UserScript==

(function () {
	"use strict";

	let alternateDomain = "https://nitter.net";

	// MutationObserver watches for changes in the document
	let observer = new MutationObserver(function () {
		if (document.querySelector(".nitter-switch")) {
			return;
		}

		const url = window.location.href;
		let newUrl = "";

		// Create button
		let btn = document.createElement("button");
		btn.classList.add("nitter-switch");
		btn.textContent = "Switch";
		btn.style.position = "fixed";
		btn.style.top = "0";
		btn.style.right = "0";
		btn.style.zIndex = "9999";

		// Add button to page
		document.body.appendChild(btn);

		btn.addEventListener("click", function () {
			if (url.includes("twitter.com")) {
				newUrl = url.replace("https://twitter.com", alternateDomain);
			} else if (url.includes(alternateDomain)) {
				newUrl = url.replace(alternateDomain, "https://twitter.com");
			}

			window.location.href = newUrl;
		});
	});

	observer.observe(document, { childList: true, subtree: true });
})();