// ==UserScript==
// @name         Ocado Price Sorter
// @namespace    http://tampermonkey.net/
// @version      1.3
// @description  Automatically set the Ocado price dropdown with name="sortBy" to "Price per: Low to High" after search or nav on Ocado.com
// @author.      pepepepepe
// @match        https://www.ocado.com/*
// @icon         https://www.google.com/s2/favicons?domain=ocado.com
// @grant        none
// @license      MIT
// @downloadURL none
// ==/UserScript==

(function () {
    'use strict';

    let dropdownSet = false;

    function waitForDropdownAndSet() {
        let attempts = 0;
        const maxAttempts = 20;

        const interval = setInterval(() => {
            const dropdown = document.querySelector('select[name="sortBy"]');
            if (dropdown) {
                for (const option of dropdown.options) {
                    if (option.textContent.includes("Price per: Low to High")) {
                        if (dropdown.value !== option.value) {
                            dropdown.value = option.value;
                            dropdown.dispatchEvent(new Event('change', { bubbles: true }));
                            console.log("✅ Dropdown set to: Price per: Low to High");
                        }
                        dropdownSet = true;
                        break;
                    }
                }
                clearInterval(interval);
            }

            if (++attempts > maxAttempts) {
                console.warn("⚠️ Could not find dropdown after waiting.");
                clearInterval(interval);
            }
        }, 500);
    }

    function handleUrlChange() {
        dropdownSet = false;
        waitForDropdownAndSet();
    }

    // Click checkout button if on relevant page
    function clickCheckoutButton() {
        const buttons = document.querySelectorAll('button, input[type="button"], input[type="submit"]');
        for (let button of buttons) {
            if (button.textContent.trim() === "Continue checkout") {
                console.log("Clicking 'Continue checkout' button.");
                button.click();
                break;
            }
        }
    }

    if (location.href.includes("/checkout")) {
        window.addEventListener("load", clickCheckoutButton);
    }

    // Detect SPA-style URL changes
    let lastUrl = location.href;
    setInterval(() => {
        const currentUrl = location.href;
        if (currentUrl !== lastUrl) {
            lastUrl = currentUrl;
            console.log("🔄 Detected URL change to:", currentUrl);
            handleUrlChange();
        }
    }, 500);

    // Initial run
    window.addEventListener('load', waitForDropdownAndSet);

})();