// ==UserScript==
// @name         Threads.net Image Downloader
// @namespace    http://tampermonkey.net/
// @version      1.6
// @license      MIT
// @esversion    11
// @description  Add a download button to a specific div on Threads.net to download all images in the <picture> tag of the post.
// @author       StevenJon0826
// @match        https://www.threads.net/*
// @grant        GM_download
// @downloadURL https://update.greasyfork.icu/scripts/508541/Threadsnet%20Image%20Downloader.user.js
// @updateURL https://update.greasyfork.icu/scripts/508541/Threadsnet%20Image%20Downloader.meta.js
// ==/UserScript==
// ==UserScript==
// @name         Threads.net Image Downloader (Button in Specified Div)
// @namespace    http://tampermonkey.net/
// @version      1.6
// @license      MIT
// @esversion    11
// @description  Add a download button to a specific div on Threads.net to download all images in the <picture> tag of the post.
// @author       StevenJon0826
// @match        https://www.threads.net/*
// @grant        GM_download
// ==/UserScript==

(function() {
    'use strict';

    function addButtonToElement(element) {
        // 檢查該元素是否已經存在按鈕，避免重複加入
        if (!element.querySelector('button.my-custom-button')) {
            // 建立按鈕
            const button = document.createElement('button');
            button.textContent = 'Download';
            button.classList.add('my-custom-button');
            button.style.position = 'relative';
            // 當按鈕被點擊時，往上找兩層並統計<picture>元素內的<img>數量
            button.addEventListener('click', function() {
                // 阻止事件的預設行為和冒泡
                event.preventDefault();
                event.stopPropagation();

                // 往上找兩層 //x1s688f
                const grandparentElement = element.parentElement?.parentElement?.parentElement?.parentElement?.parentElement;
                if (grandparentElement) {
                    // 在祖先層級中尋找所有的<picture>元素
                    const pictures = grandparentElement.querySelectorAll('picture img');
                    // 找到 class 包含 x1s688f 的 <span> 並取得其文字內容
                    const spanElement = grandparentElement.querySelector('span[class*="x1s688f"]');
                    let spanText;
                    if (spanElement) {
                        spanText = spanElement.textContent; // 取得文字內容
                    }
                    const timeElement = grandparentElement.querySelector('time'); // 假設只有一個time元素
                    let formattedTime;
                    if (timeElement) {
                        const datetimeValue = timeElement.getAttribute('datetime'); // 取得datetime屬性
                        const dateObject = new Date(datetimeValue); // 將datetime轉換為Date物件

                        // 格式化日期為YYYYMMDD_hhmmss
                        const year = dateObject.getFullYear();
                        const month = String(dateObject.getMonth() + 1).padStart(2, '0'); // 月份從0開始，所以加1
                        const day = String(dateObject.getDate()).padStart(2, '0');
                        const hours = String(dateObject.getHours()).padStart(2, '0');
                        const minutes = String(dateObject.getMinutes()).padStart(2, '0');
                        const seconds = String(dateObject.getSeconds()).padStart(2, '0');

                        formattedTime = `${year}${month}${day}_${hours}${minutes}${seconds}`;
                    }
                    pictures.forEach((img, index) => {
                        const imageUrl = img.src;
                        const filename = `Threads-${spanText}-${formattedTime}-${index + 1}.jpg`;
                        GM_download(imageUrl, filename);
                    });

                    // 找到 aria-label="讚" 的元素並模擬點擊
                    const likeButton = grandparentElement.querySelector('[aria-label="讚"]');
                    if (likeButton) {
                        if (typeof likeButton.click === 'function') {
                            likeButton.click(); // 如果元素有 click 方法，模擬點擊
                        } else {
                            // 如果該元素是SVG，則創建一個事件手動觸發
                            const event = new MouseEvent('click', {
                                bubbles: true,
                                cancelable: true
                            });
                            likeButton.dispatchEvent(event); // 模擬點擊事件
                        }
                        console.log('Like button clicked');
                    } else {
                        console.log('No like button with aria-label "讚" found');
                    }

                } else {
                    console.log('Could not find grandparent element');
                }
            });
            // 將按鈕加入到該元素中
            element.appendChild(button);
        }
    }

    function scanForElements() {
        // 定期掃描符合條件的元素
        const elements = document.querySelectorAll('div[class*="x1fc57z9"]');
        elements.forEach(addButtonToElement);
    }

    // 使用setInterval每隔一段時間檢查畫面上是否有符合條件的元素
    setInterval(scanForElements, 500); // 每秒檢查一次
})();