// ==UserScript==
// @name         论坛改默认排序为发帖时间
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  支持油猴中文网和吾爱改默认排序为发帖时间
// @author       hua
// @match        https://bbs.tampermonkey.net.cn/forum-*-*.html
// @match        https://www.52pojie.cn/forum-*-*.html
// @grant        unsafeWindow
// @run-at       document-start
// ==/UserScript==

changed_orderby = false
changed_thread = false
href = location.href
let public_time_selector_express

if (href.indexOf('https://www.52pojie.cn') === 0) {
    changed_orderby = true
    public_time_selector_express = 'td:nth-child(3) > em > span'
}
if (href.indexOf('https://bbs.tampermonkey.net.cn') === 0) {
    public_time_selector_express = 'td > div > p > em:nth-child(3) > span'
}

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 = 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) {
        // 判断最后一个节点是否渲染完成
        if (!thread_node_list[thread_node_list.length - 1].querySelector(public_time_selector_express)) return false
        thread_node_list.splice(0, sorted_node_list.length)
    }
    thread_node_list.sort(function (node_a, node_b) {
        if (!node_a.querySelector(public_time_selector_express)) debugger
        let public_str_time_a = node_a.querySelector(public_time_selector_express).textContent
        let public_str_time_b = node_b.querySelector(public_time_selector_express).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)
    })
    return true
}