// ==UserScript==
// @name         NovaAlpha - Temu price adjustment checker
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Scans your Temu orders page for orders eligible for a price adjustment refund and pops up direct links to claim them
// @author       NovaAlpha
// @match        *://*.temu.com/*bgt_orders.html*
// @grant        GM_openInTab
// ==/UserScript==


/*
 * Run this below to remove the saved popup position/size data
 *
localStorage.removeItem('popupTop_' + window.location.origin);
localStorage.removeItem('popupLeft_' + window.location.origin);

*/


(function()
{
    'use strict';

    var reminderDiv = document.createElement('div');
    var contentHTML = '';
    var DisplayPopup = false;
    var ordersProcessed = false;


    // Popup UI (same drag/resize/toggle popup used by the reminder script,
    // kept here so this script can stand alone)

    function createPopup()
    {
        if (DisplayPopup === true)
        {
            var reminderDiv = document.createElement('div');
            reminderDiv.id = 'yourPopupId';

            var dragHandle = document.createElement('div');
            dragHandle.style.height = '20px';
            dragHandle.style.backgroundColor = '#ccc';
            dragHandle.style.cursor = 'move';
            dragHandle.innerHTML = 'Drag here';
            dragHandle.style.textAlign = 'center';
            reminderDiv.appendChild(dragHandle);

            var toggleButton = document.createElement('button');
            toggleButton.innerHTML = 'Show / Hide';
            toggleButton.style.marginTop = '10px';
            toggleButton.style.marginBottom = '10px';
            reminderDiv.appendChild(toggleButton);

            var contentDiv = document.createElement('div');
            contentDiv.innerHTML = contentHTML;
            reminderDiv.appendChild(contentDiv);

            reminderDiv.style.position = 'fixed';
            reminderDiv.style.padding = '10px 10px 0px 10px';
            reminderDiv.style.backgroundColor = 'cyan';
            reminderDiv.style.border = '2px solid black';
            reminderDiv.style.zIndex = '10000';
            reminderDiv.style.width = localStorage.getItem('popupWidth_' + window.location.origin) || '290px';
            reminderDiv.style.maxWidth = '700px';
            reminderDiv.style.maxHeight = '850px';
            reminderDiv.style.wordWrap = 'break-word';
            reminderDiv.style.resize = 'both';
            reminderDiv.style.overflow = 'auto';
            reminderDiv.style.top = localStorage.getItem('popupTop_' + window.location.origin) || '50%';
            reminderDiv.style.left = localStorage.getItem('popupLeft_' + window.location.origin) || '10px';

            // Check if isContentVisible is not found in local storage, default to true
            var isContentVisible = localStorage.getItem('isContentVisible_' + window.location.origin);
            if (isContentVisible === null) {
                isContentVisible = true;
            } else {
                isContentVisible = isContentVisible === 'true';
            }

            if (!isContentVisible) {
                contentDiv.style.display = 'none';
                reminderDiv.style.height = 'auto';
                localStorage.setItem('popupOriginalWidth_' + window.location.origin, reminderDiv.style.width);
                dragHandle.style.width = toggleButton.offsetWidth + 'px';
                reminderDiv.style.width = 'auto';
                dragHandle.style.width = '';
            }

            toggleButton.addEventListener('click', function () {
                isContentVisible = !isContentVisible;
                localStorage.setItem('isContentVisible_' + window.location.origin, isContentVisible);

                if (!isContentVisible) {
                    contentDiv.style.display = 'none';
                    reminderDiv.style.height = 'auto';
                    localStorage.setItem('popupOriginalWidth_' + window.location.origin, reminderDiv.style.width);
                    dragHandle.style.width = toggleButton.offsetWidth + 'px';
                    reminderDiv.style.width = 'auto';
                } else {
                    contentDiv.style.display = 'block';
                    reminderDiv.style.height = 'auto';
                    reminderDiv.style.width = localStorage.getItem('popupOriginalWidth_' + window.location.origin);
                    dragHandle.style.width = '';
                }
            });

            dragHandle.addEventListener('mousedown', function (e) {
                var offsetX = e.clientX - parseInt(window.getComputedStyle(reminderDiv).left);
                var offsetY = e.clientY - parseInt(window.getComputedStyle(reminderDiv).top);

                function mouseMoveHandler(e) {
                    reminderDiv.style.top = (e.clientY - offsetY) + 'px';
                    reminderDiv.style.left = (e.clientX - offsetX) + 'px';
                }

                function mouseUpHandler() {
                    window.removeEventListener('mousemove', mouseMoveHandler);
                    window.removeEventListener('mouseup', mouseUpHandler);
                    localStorage.setItem('popupTop_' + window.location.origin, reminderDiv.style.top);
                    localStorage.setItem('popupLeft_' + window.location.origin, reminderDiv.style.left);
                }

                window.addEventListener('mousemove', mouseMoveHandler);
                window.addEventListener('mouseup', mouseUpHandler);
            });

            document.body.appendChild(reminderDiv);

            // Calculate maximum allowable top and left positions
            var maxTop = window.innerHeight - reminderDiv.offsetHeight;
            var maxLeft = window.innerWidth - reminderDiv.offsetWidth;

            var storedTop = localStorage.getItem('popupTop_' + window.location.origin);
            var storedLeft = localStorage.getItem('popupLeft_' + window.location.origin);

            storedTop = storedTop !== null ? parseInt(storedTop) : 10;
            storedLeft = storedLeft !== null ? parseInt(storedLeft) : 10;

            reminderDiv.style.top = Math.min(Math.max(storedTop, 30), maxTop) + 'px';
            reminderDiv.style.left = Math.min(Math.max(storedLeft, 0), maxLeft) + 'px';

            reminderDiv.addEventListener('mousemove', function () {
                if (isContentVisible) {
                    localStorage.setItem('popupWidth_' + window.location.origin, reminderDiv.style.width);
                    localStorage.setItem('popupHeight_' + window.location.origin, reminderDiv.style.height);
                }
            });
        }
    }

    function displayPopup() {
        if (DisplayPopup === true)
        {
            var existingPopup = document.getElementById('yourPopupId');

            if (!existingPopup) {
                createPopup();
            } else {
                reminderDiv.style.position = 'fixed';

                var popupWidth = localStorage.getItem('popupWidth_' + window.location.origin) || '290px';
                var popupHeight = localStorage.getItem('popupHeight_' + window.location.origin) || 'auto';

                var maxTop = window.innerHeight - existingPopup.offsetHeight;
                var maxLeft = window.innerWidth - existingPopup.offsetWidth;

                var storedTop = localStorage.getItem('popupTop_' + window.location.origin);
                var storedLeft = localStorage.getItem('popupLeft_' + window.location.origin);

                storedTop = storedTop !== null ? parseInt(storedTop) : 10;
                storedLeft = storedLeft !== null ? parseInt(storedLeft) : 10;

                existingPopup.style.top = Math.min(Math.max(storedTop, 0), maxTop) + 'px';
                existingPopup.style.left = Math.min(Math.max(storedLeft, 0), maxLeft) + 'px';
                existingPopup.style.width = popupWidth;
                existingPopup.style.height = popupHeight;
            }
        }
    }


    // Order scanning + price adjustment eligibility check

    function extractOrderData() {
        const orders = [];
        const seenIDs = new Set();

        // Find leaf nodes whose text is an Order Time label
        const leafNodes = Array.from(document.querySelectorAll('span, div, p'))
            .filter(el => el.children.length === 0);

        leafNodes.forEach(el => {
            const text = el.textContent.trim();
            if (!/^Order\s*[Tt]ime/i.test(text) || text.length > 20) return;

            // Walk up to find a card that also contains an Order ID
            let card = el.parentElement;
            for (let depth = 0; depth < 12; depth++) {
                if (!card || card === document.body) break;
                if (/Order\s*(ID|no\.?|number)/i.test(card.textContent)) {
                    // Extract all leaf text nodes within this card
                    const cardLeafs = Array.from(card.querySelectorAll('span, div, p'))
                        .filter(n => n.children.length === 0);

                    let orderTime = null;
                    let orderID = null;

                    for (let i = 0; i < cardLeafs.length; i++) {
                        const t = cardLeafs[i].textContent.trim();
                        if (/^Order\s*[Tt]ime/i.test(t) && t.length <= 20) {
                            // Next leaf with a 4-digit year is the value
                            for (let j = i + 1; j < Math.min(i + 5, cardLeafs.length); j++) {
                                const candidate = cardLeafs[j].textContent.trim();
                                if (/\d{4}/.test(candidate) && candidate.length <= 30) {
                                    orderTime = candidate;
                                    break;
                                }
                            }
                        }
                        if (/^Order\s*(ID|no\.?):?$/i.test(t)) {
                            // Next non-empty leaf is the value
                            for (let j = i + 1; j < Math.min(i + 5, cardLeafs.length); j++) {
                                const candidate = cardLeafs[j].textContent.trim();
                                if (candidate.length > 0 && !/^Order/i.test(candidate)) {
                                    orderID = candidate;
                                    break;
                                }
                            }
                        }
                    }

                    if (orderTime && orderID && !seenIDs.has(orderID)) {
                        seenIDs.add(orderID);
                        orders.push({ orderTime, orderID });
                    }
                    break;
                }
                card = card.parentElement;
            }
        });

        return orders;
    }

    async function checkPriceAdjustment(orderID) {
        const url = `https://www.temu.com/w/bgas_refund_difference.html?parent_order_sn=${orderID}&biz_source=1-000-5&after_sales_type=1&belongTab=AO&_x_sessn_id=dwjzf47d2c`;
        try {
            const resp = await fetch(url, { credentials: 'include' });
            const html = await resp.text();

            // Try to extract embedded page data (Next.js / SSR patterns)
            const embeddedPatterns = [
                /<script[^>]+id="__NEXT_DATA__"[^>]*>([\s\S]*?)<\/script>/,
                /window\.__INITIAL_STATE__\s*=\s*({[\s\S]*?});\s*<\/script>/,
                /window\.__SSR_DATA__\s*=\s*({[\s\S]*?});\s*<\/script>/,
            ];
            for (const pat of embeddedPatterns) {
                const m = html.match(pat);
                if (!m) continue;
                try {
                    const str = JSON.stringify(JSON.parse(m[1]));
                    console.log('[Temu Price Adj] embedded JSON for', orderID, ':', str.substring(0, 800));
                    // Positive signals
                    if (/["']can_apply["']\s*:\s*true/.test(str)) { console.log('[Temu Price Adj] POSITIVE: can_apply=true'); return true; }
                    if (/["'](price_reduce|reduce|refund)_amount["']\s*:\s*[1-9]/.test(str)) { console.log('[Temu Price Adj] POSITIVE: amount>0'); return true; }
                    if (/["'](eligible|is_eligible|can_claim)["']\s*:\s*true/.test(str)) { console.log('[Temu Price Adj] POSITIVE: eligible=true'); return true; }
                    // Negative signals
                    if (/["']can_apply["']\s*:\s*false/.test(str)) { console.log('[Temu Price Adj] NEGATIVE: can_apply=false'); return false; }
                    if (/["'](price_reduce|reduce|refund)_amount["']\s*:\s*0[,}"']/.test(str)) { console.log('[Temu Price Adj] NEGATIVE: amount=0'); return false; }
                    if (/["'](eligible|is_eligible|can_claim)["']\s*:\s*false/.test(str)) { console.log('[Temu Price Adj] NEGATIVE: eligible=false'); return false; }
                    console.log('[Temu Price Adj] embedded JSON found but no eligibility signal matched for', orderID);
                } catch(e) { console.log('[Temu Price Adj] JSON parse error', e); }
            }

            // Ineligible orders redirect to the order detail page (empty main div + bgt_order_detail i18n keys)
            if (html.includes('<div id="main"></div>')) {
                console.log('[Temu Price Adj] NEGATIVE: empty main div (redirected to order detail) for', orderID);
                return false;
            }

            console.log('[Temu Price Adj] POSITIVE: price adjustment page rendered for', orderID);
            return true;
        } catch(e) {
            console.log('[Temu Price Adj] fetch error for', orderID, e);
            return true;
        }
    }

    async function processOrders() {
        if (ordersProcessed) return;
        const orders = extractOrderData();
        if (orders.length === 0) {
            console.log('[Temu Script] No orders found yet');
            return;
        }

        ordersProcessed = true;
        observer.disconnect();
        console.log('[Temu Script] Found orders:', orders);

        for (const { orderTime, orderID } of orders) {
            console.log('[Temu Script] Order:', orderID, orderTime, '| within 30 days:', isWithin30Days(orderTime));
            if (!isWithin30Days(orderTime)) continue;

            const eligible = await checkPriceAdjustment(orderID);
            console.log('[Temu Script] Price adjustment eligible:', orderID, eligible);
            if (!eligible) continue;

            const link = `https://www.temu.com/w/bgas_refund_difference.html?parent_order_sn=${orderID}&biz_source=1-000-5&after_sales_type=1&belongTab=AO&_x_sessn_id=dwjzf47d2c`;
            contentHTML += `<br><br><a href="${link}">${link}</a>`;
            DisplayPopup = true;
            GM_openInTab(link, { active: false, insert: true });
        }

        if (DisplayPopup) {
            createPopup();
            displayPopup();
        }
    }

    function isWithin30Days(dateString) {
        var orderDate = new Date(dateString);
        var currentDate = new Date();

        // Calculate the difference in milliseconds
        var difference = currentDate - orderDate;

        // Calculate the difference in days
        var daysDifference = difference / (1000 * 60 * 60 * 24);

        return daysDifference <= 30;
    }

    // Watch for DOM changes (SPA dynamic load)
    var observer = new MutationObserver(function() { if (!ordersProcessed) processOrders(); });
    observer.observe(document.body, { childList: true, subtree: true });

    // Also retry on fixed intervals as fallback
    setTimeout(processOrders, 3000);
    setTimeout(processOrders, 6000);
    setTimeout(processOrders, 12000);
    setTimeout(function() { observer.disconnect(); }, 30000);

})();