// ==UserScript==
// @name         油猴中文改帖子默认排序
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  将油猴中文网的帖子默认排序改为发帖时间
// @author       hua
// @match        https://bbs.tampermonkey.net.cn/forum-*-*.html
// @grant        unsafeWindow
// @run-at       document-start
// ==/UserScript==

changed_orderby = false
changed_thread = false
let observer = new MutationObserver(function (mutationsList) {
    for (let mutation of mutationsList) {
        if (mutation.type === 'childList' && mutation.addedNodes.length > 0) {
            if (changed_orderby && changed_thread) {
                observer.disconnect()
            }
            if (!changed_orderby) {
                let orderby_node = document.querySelector('#filter_orderby > span')
                if (orderby_node){
                    changed_orderby = true
                    orderby_node.textContent = '发帖时间'
                }
            }
            if (!changed_thread) {
               let normal_thread_nodes = document.querySelectorAll('[id^="normalthread_"]')
               console.log(normal_thread_nodes.length);
               if (normal_thread_nodes.length > 0) {
                   changed_thread = true
                   sort_thread_node()
               }
            }
        }
    }
});
observer.observe(document, { childList: true, subtree: true });

function sort_thread_node() {
    let table_node = document.querySelector('#threadlisttableid')
    let thread_node_list = Array.from(table_node.children)
    let sorted_node_list = []
    for (let node of thread_node_list) {
        let id = node.getAttribute('id')
        if (id && id.indexOf('normalthread') === 0) {
            break
        }
        sorted_node_list.push(node)
    }
    if (sorted_node_list.length > 0) {
        thread_node_list.splice(0, sorted_node_list.length)
    }
    thread_node_list.sort(function (node_a, node_b) {
        let public_str_time_a = node_a.querySelector('td > div > p > em:nth-child(3) > span').textContent
        let public_str_time_b = node_b.querySelector('td > div > p > em:nth-child(3) > span').textContent
        return new Date(public_str_time_b) - new Date(public_str_time_a)
    });
    Array.prototype.push.apply(sorted_node_list, thread_node_list)
    table_node.innerHTML = ""
    sorted_node_list.forEach(function (node) {
        table_node.append(node)
    })
}