// ==UserScript==
// @name         Wikipedia skins
// @description  Restore the old Wikipedia look or choose between other available skins: Vector 2022, Vector legacy 2010, MinervaNeue, MonoBook, Timeless, Modern, Cologne Blue
// @version      1.2.0
// @author       Pabli
// @homepageURL  https://greasyfork.org/scripts/523252-wikipedia-skins
// @supportURL   https://greasyfork.org/scripts/523252-wikipedia-skins/feedback
// @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/*
// @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 url = new URL(window.location.href);
const domains = ['wikipedia.org', 'wiktionary.org', 'wikiquote.org', 'wikinews.org', 'wikidata.org', 'wikivoyage.org', 'wikiversity.org', 'wikifunctions.org', 'wikisource.org', 'wikibooks.org', 'wikimedia.org', 'mediawiki.org'];

// https://en.wikipedia.org/wiki/Wikipedia:Skin
const skin = await GM_getValue('skin', 'vector');
const skins = {
	'vector-2022': 'Vector 2022 (default on desktop from 2022)',
	vector: 'Vector legacy 2010 (default on desktop from 2010 to 2021)',
	minerva: 'MinervaNeue (mobile)',
	monobook: 'MonoBook (default from 2004 to 2009)',
	timeless: 'Timeless',
	modern: 'Modern (created in 2008 and deprecated in 2021)',
	cologneblue: 'Cologne Blue (created in 2002 and deprecated in 2019)'
};
const options = {
	nostalgia: {
		value: await GM_getValue('nostalgia', true),
		label: 'Nostalgia on the nostalgia.wikipedia.org (original skin from 2001)',
	},
	cleanUrl: {
		value: await GM_getValue('cleanUrl', true),
		label: 'Clean URL (remove ?useskin=skinname from the URL)',
	},
};

Object.entries(skins).forEach(([key, label]) => {
	GM_registerMenuCommand(
		`${skin === key ? '◉' : '○'} ${label}`,
		async () => {
			await GM_setValue('skin', key);
			
			const url = new URL(window.location.href);
			url.searchParams.append('useskin', key);
			window.location.href = url;
		}
	);
});
Object.entries(options).forEach(([key, config]) => {
	GM_registerMenuCommand(
		`${config.value ? '☑' : '☐'} ${config.label}`,
		async () => {
			options[key].value = !options[key].value;
			await GM_setValue(key, options[key].value);
			
			deleteUseskinParam()
			window.location.reload();
		}
	);
});

if (options.nostalgia.value && window.location.hostname === 'nostalgia.wikipedia.org') return;

function deleteUseskinParam() {
	const url = new URL(window.location.href);
	
	if (url.searchParams.has('useskin')) {
		url.searchParams.delete('useskin');
		window.history.replaceState({}, '', url);
	}
}

if (!url.searchParams.has('useskin') && url.pathname !== '/') {
	url.searchParams.append('useskin', skin);
	window.location.href = url;
} else if (options.cleanUrl.value) {
	deleteUseskinParam();
	setTimeout(deleteUseskinParam, 1000);
	setTimeout(deleteUseskinParam, 3000);
}

function linkUseskin(e) {
	let link = e.target.closest('a[href]:not([href^="#"])');
	if (!link || link.dataset.useskin) return;
	
	if (!link.getAttribute('href').startsWith('/') &&
	    !domains.some(domain => link.hostname.endsWith(`.${domain}`) || link.hostname === domain)) return;
	
	const url = new URL(link.href);
	url.searchParams.append('useskin', skin);
	link.href = url.toString();
	link.dataset.useskin = true;
}
document.addEventListener('mouseover', linkUseskin);
document.addEventListener('focusin', linkUseskin);

})();