// ==UserScript==
// @name            Classic Google Tabs
// @namespace       classic-google-tabs
// @author          Kirills Reunovs
// @description     Brings back the "Maps" tab and removes the "AI Mode" tab in Google Search.
// @version         2026-07-06
// @icon            https://www.google.com/s2/favicons?sz=64&domain=google.com
// @updateURL       https://github.com/Kirlovon/classic-google-tabs/raw/main/classic-google-tabs.user.js
// @downloadURL     https://github.com/Kirlovon/classic-google-tabs/raw/main/classic-google-tabs.user.js
// @match           *://google.com/search*
// @match           *://www.google.com/search*
// @match           *://www.google.com.au/search*
// @match           *://www.google.co.uk/search*
// @match           *://www.google.ca/search*
// @match           *://www.google.nl/search*
// @match           *://www.google.be/search*
// @match           *://www.google.de/search*
// @match           *://www.google.dk/search*
// @match           *://www.google.fr/search*
// @match           *://www.google.se/search*
// @match           *://www.google.no/search*
// @match           *://www.google.fi/search*
// @match           *://www.google.lv/search*
// @match           *://www.google.lt/search*
// @match           *://www.google.ie/search*
// @match           *://www.google.pl/search*
// @match           *://www.google.ru/search*
// @match           *://www.google.tld/search*
// @run-at          document-start
// @grant           none
// ==/UserScript==

// Remove AI Mode tab
const REMOVE_AI_TAB = true;

// Add Maps tab
const ADD_MAPS_TAB = true;

// Remove Short Videos tab
const REMOVE_SHORT_VIDEOS_TAB = false;

(() => {
	'use strict';

	/**
	 * Remove the "AI Mode" tab from the navigation list.
	 */
	function removeAITab() {
		const excludedKeywords = ['AI Mode', 'AI', 'ИИ', 'IA', 'ШІ'];
		const listItems = document.querySelectorAll('[role="listitem"]');
		listItems.forEach((item) => {
			if (excludedKeywords.some((keyword) => item.textContent.includes(keyword))) {
				item.remove();
			}
		});
	}

	/**
	 * Remove the "Short Videos" tab from the navigation list.
	 */
	function removeShortVideosTab() {
		const excludedKeywords = ['Short videos', 'Короткие видео', 'Korte video', 'Kurze videos', 'Vidéos courtes', 'Korte video', 'Īsie videoklipi'];
		const listItems = document.querySelectorAll('[role="listitem"]');
		listItems.forEach((item) => {
			if (excludedKeywords.some((keyword) => item.textContent.toLowerCase().includes(keyword.toLowerCase()))) {
				item.remove();
			}
		});
	}

	/**
	 * Add a "Maps" tab to the navigation list.
	 */
	function addMapsTab() {
		const combobox = document.querySelector('[role="combobox"]');
		const query = combobox ? encodeURIComponent(combobox.value) : '';

		const list = document.querySelector('[role="list"]');
		const firstListItem = document.querySelector('[role="listitem"]');

		// Check if Maps tab already exists
		const existingMapsTab = Array.from(document.querySelectorAll('[role="listitem"]')).find((item) => {
			const link = item.querySelector('a');
			return link?.href.includes('google.com/maps') || item.textContent.includes('Maps');
		});

		if (list && firstListItem && query && !existingMapsTab) {
			const mapsTab = firstListItem.cloneNode(true);

			// Remove selected/active state from cloned tab
			mapsTab.querySelectorAll('[selected]').forEach((el) => {
				el.removeAttribute('selected');
			});

			// Update the link to Google Maps
			const link = mapsTab.querySelector('a');
			if (link) link.href = `https://www.google.com/maps?q=${query}`;

			// Update the text to "Maps"
			const textElements = mapsTab.querySelectorAll('span');
			textElements.forEach((el) => {
				if (el.childNodes.length === 1 && el.childNodes[0].nodeType === Node.TEXT_NODE) {
					const text = el.textContent.trim();
					if (text && text !== '' && !text.includes('http')) {
						el.textContent = 'Maps';
					}
				}
			});

			// Insert Maps tab at the desired position
			const tabIndex = REMOVE_AI_TAB ? 2 : 3;
			if (list.children.length >= tabIndex) {
				list.insertBefore(mapsTab, list.children[tabIndex]);
			} else {
				list.appendChild(mapsTab);
			}
		}
	}

	/**
	 * Rework navigation tabs.
	 */
	function reworkNavigation() {
		if (REMOVE_AI_TAB) removeAITab();
		if (ADD_MAPS_TAB) addMapsTab();
		if (REMOVE_SHORT_VIDEOS_TAB) removeShortVideosTab();
	}

	// Observe page changes to reapply modifications when Google rebuilds navigation
	const observer = new MutationObserver(() => reworkNavigation());
	const startObserving = () => {
		const root = document.documentElement;
		if (!root) return setTimeout(startObserving, 50); // Retry if document root is not ready yet

		reworkNavigation(); // Initial run once the document root is available
		observer.observe(root, {
			childList: true,
			subtree: true
		});
	};

	startObserving(); // Watch for changes
})();