// ==UserScript==
// @name         Wikipedia Vector Legacy Layout
// @description  Restores the old Wikipedia layout
// @version      1.1.0
// @author       Pabli
// @namespace    https://github.com/pabli24
// @license      MIT
// @match        *://*.wikipedia.org/*
// @match        *://*.wiktionary.org/*
// @match        *://*.wikiquote.org/*
// @match        *://*.wikinews.org/*
// @match        *://*.wikidata.org/*
// @match        *://*.wikivoyage.org/*
// @match        *://*.wikiversity.org/*
// @match        *://*.wikifunctions.org/*
// @match        *://*.wikisource.org/*
// @match        *://*.wikibooks.org/*
// @match        *://*.wikimedia.org/*
// @match        *://*.mediawiki.org/*
// @exclude      *://www.wikipedia.org/*
// @run-at       document-start
// @icon         https://www.google.com/s2/favicons?sz=64&domain=wikipedia.org
// @grant        GM_setValue
// @grant        GM_getValue
// @grant        GM_registerMenuCommand
// @downloadURL none
// ==/UserScript==

(async () => {
'use strict';

const SKINS = {
	vector: 'Vector legacy (2010)',
	'vector-2022': 'Vector (2022)',
	minerva: 'MinervaNeue',
	monobook: 'MonoBook',
	timeless: 'Timeless'
};

const SKIN = await GM_getValue('skin', 'vector');

Object.entries(SKINS).forEach(([key, label]) => {
	GM_registerMenuCommand(
		`${SKIN === key ? '◉' : '○'} ${label}`,
		async () => {
			await GM_setValue('skin', key);
			window.location.reload();
		}
	);
});

let url = new URL(window.location.href);

if (!url.searchParams.has('useskin')) {
	url.searchParams.append('useskin', SKIN);
	window.location.href = url;
} else {
	url.searchParams.delete('useskin');
	window.history.replaceState({}, '', url);
	
	setTimeout(() => {
		url = new URL(window.location.href);
		
		if (url.searchParams.has('useskin')) {
			url.searchParams.delete('useskin')
			window.history.replaceState({}, '', url);
		}
	}, 1000);
}

window.addEventListener('click', (e) => {
	if (e.button !== 0) return;
	
	let link = e.target.closest('[href^="/"]');
	if (!link) return;
	
	e.preventDefault();
	e.stopPropagation();
	e.stopImmediatePropagation();
	
	link = new URL(link);
	link.searchParams.append('useskin', SKIN);
	
	window.location.href = link;
});

})();