Gemini Model Memory

Automatically select default model. Remembers user's choice.
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// ==UserScript==
// @name         Gemini Model Memory
// @namespace    http://greasyfork.org/
// @version      1.9
// @description  Automatically select default model. Remembers user's choice.
// @author       Bui Quoc Dung
// @match        https://gemini.google.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    if (window.self !== window.top) return;

    const siteConfig = {
        selectors: {
            pickerBtn: 'button[data-test-id="bard-mode-menu-button"]',
            menuItems: '[role="menuitemradio"], [role="menuitem"]'
        }
    };

    const timings = {
        interval: 1000,
        renderDelay: 600,
        cooldown: 1500
    };

    const MODELS = {
        0: { keywords: ["Flash", "Nhanh", "Fast"] },
        1: { keywords: ["Thinking", "Tư duy"] },
        2: { keywords: ["Pro", "Advanced"] }
    };

    let savedIndex = localStorage.getItem('gemini_saved_model_index');
    let targetModelId = (savedIndex !== null && MODELS[savedIndex]) ? parseInt(savedIndex) : 1;

    let isSwitching = false;
    let userManualSelection = false;

    function isAppHomePage() {
        const regex = /^https:\/\/gemini\.google\.com\/(u\/\d+\/)?app\/?([?#].*)?$/;
        return regex.test(window.location.href);
    }

    document.addEventListener('click', (e) => {
        if (isSwitching) return;

        const pickerBtn = document.querySelector(siteConfig.selectors.pickerBtn);
        const item = e.target.closest(siteConfig.selectors.menuItems);

        if (item) {
            const itemText = item.innerText || item.textContent || "";
            for (let key in MODELS) {
                if (MODELS[key].keywords.some(k => itemText.includes(k))) {
                    targetModelId = parseInt(key);
                    localStorage.setItem('gemini_saved_model_index', key);
                    break;
                }
            }
            userManualSelection = false;
        } else if (pickerBtn && pickerBtn.contains(e.target)) {
            userManualSelection = true;
        } else {
            userManualSelection = false;
        }
    }, true);

    setInterval(() => {
        if (!isAppHomePage() || isSwitching || userManualSelection) return;

        const pickerBtn = document.querySelector(siteConfig.selectors.pickerBtn);
        if (!pickerBtn) return;

        const currentText = pickerBtn.innerText || pickerBtn.textContent || "";
        const targetModel = MODELS[targetModelId];

        if (!targetModel) return;
        if (targetModel.keywords.some(k => currentText.includes(k))) return;

        isSwitching = true;
        pickerBtn.click();

        setTimeout(() => {
            const menuItems = document.querySelectorAll(siteConfig.selectors.menuItems);
            let clicked = false;

            for (let item of menuItems) {
                if (item.getBoundingClientRect().width > 0) {
                    const itemText = item.innerText || item.textContent || "";
                    if (targetModel.keywords.some(k => itemText.includes(k))) {
                        item.click();
                        clicked = true;
                        break;
                    }
                }
            }

            if (!clicked) document.body.click();

            setTimeout(() => {
                isSwitching = false;
            }, timings.cooldown);

        }, timings.renderDelay);
    }, timings.interval);

})();