// ==UserScript==
// @name         Fix Home, End, Page Up and Page Down keys for Chat GPT OpenAI broken chats
// @description  For some Chat GPT OpenAI chats the Home, End, Page Up and Page Down keys stop working, this script fixes the problem
// @author       NWP
// @namespace    https://greasyfork.org/users/877912
// @version      0.2
// @license      MIT
// @match        https://chat.openai.com/*
// @grant        none
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    document.addEventListener('keydown', function(event) {
        const scrollableContainer = Array.from(document.querySelectorAll('div')).find(div => /^react-scroll-to-bottom--css-\S+$/.test(div.className));

        if (scrollableContainer) {
            if (event.key === 'Home') {
                event.preventDefault();
                scrollableContainer.scroll(0, 0);
            } else if (event.key === 'End') {
                event.preventDefault();
                scrollableContainer.scroll(0, scrollableContainer.scrollHeight);
            } else if (event.key === 'PageUp') {
                event.preventDefault();
                const scrollAmount = scrollableContainer.clientHeight * 0.75;
                scrollableContainer.scrollBy(0, -scrollAmount);
            } else if (event.key === 'PageDown') {
                event.preventDefault();
                const scrollAmount = scrollableContainer.clientHeight * 0.75;
                scrollableContainer.scrollBy(0, scrollAmount);
            }
        } else {
            console.error("No scrollable container found with the specified class pattern.");
        }
    });
})();