// ==UserScript==
// @name         AcWing Better!
// @version      3.12
// @description  AcWing界面美化，功能增强，视频时间点标记跳转，代码markdown一键复制
// @author       北极小狐
// @match        https://www.acwing.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=acwing.com
// @grant        none
// @run-at       document-start
// @require      https://cdn.bootcdn.net/ajax/libs/turndown/7.1.1/turndown.min.js
// @license      MIT
// @namespace    https://greasyfork.org/users/747162
// @downloadURL none
// ==/UserScript==

// 样式
function loadCssCode(code){
    var style = document.createElement('style');
    style.type = 'text/css';
    style.rel = 'stylesheet';
    style.appendChild(document.createTextNode(code));
    var head = document.getElementsByTagName('head')[0];
    head.appendChild(style);
}
loadCssCode(`
/* 宽度自适应 */
.container {
    width: auto !important;
}
/* 去除没用的图标 */
.file-explorer-main-field-item.file-explorer-main-field-item-desktop {
    width: 0px;
    height: 0px;
    overflow: hidden;
}
/* 背景bing壁纸 */
#acwing_body {
    background: white url(https://bingw.jasonzeng.dev) fixed !important;
}
/* 其他 */
.fs-gui-taskbar {
    height: 3.5vh !important;
    background-color: #dde1e5  !important;
}
.fs-gui-taskbar-widgets-apps-item > img {
    height: 2.2vh !important;
    width: 2.2vh !important;
    margin: 0.5vh 0.5vh 0.5vh 0.5vh !important;
}
.fs-gui-taskbar-widgets-clock{
    width: 0px  !important;
    height: 0px  !important;
    overflow: hidden  !important;
}
.fs-gui-taskbar-widgets-apps-item {
    margin-right: 2vh !important;
}
#fs-gui-taskbar-search-field {
    font-size: 1.3vh !important;
}
.fs-gui-taskbar-search-icon {
    font-size: 1.6vh !important;
    top: 0.95vh !important;
    left: 4.3vh !important;
}
footer#acwing_footer .copyright {
    color: #fff;
}
footer#acwing_footer .copyright a, .links a, footer#acwing_footer .container {
    color: #fff;
}
.fs-gui-taskbar-begin {
    height: 3vh !important;
    width: 3vh !important;
    margin: 0.2vh !important;
    border-radius: 60%;
    background-color: #fffefe80 !important;
}
button.fs-gui-taskbar-begin.pull-left.btn.btn-default img {
    width: 83% !important;
}
#fs-gui-taskbar-search-field {
    height: 90% !important;
    margin: 0.15vh;
    border-radius: 100px;
    border-width: 0.2vh;
    border-style: solid;
    border-color: #c7d2dd;
}
#fs-gui-taskbar-search-field:focus-visible {
    border-width: 0.2vh;
    border-style: solid;
    border-color: #8bb2d9;
    outline: -webkit-focus-ring-color auto 0px;
}

/* 复制按钮 */
pre.hljs {
    display: flex;
    justify-content: space-between;
}
span.copy-button {
    cursor: pointer;
    background-color: #e6e6e6;
    color: #727378;
    height: 2vh;
    font-size: 1.3vh;
    border-radius: 0.3rem;
    padding: 1px 5px;
    margin: 5px;
    box-shadow: 0 0 1px #0000004d;
}
span.copy-button.copied {
    background-color: #07e65196;
    color: #104f2b;
}
/* html2md */
.html2md-panel {
    display: flex;
    justify-content: flex-end;
}
button.html2mdButton {
    height: 3vh;
    width: 3vh;
}
button.html2mdButton {
    cursor: pointer;
    background-color: #e6e6e6;
    color: #727378;
    height: 3vh;
    width: auto;
    font-size: 1.3vh;
    border-radius: 0.3rem;
    border: none;
    padding: 1px 5px;
    margin: 5px;
    box-shadow: 0 0 1px #0000004d;
}
button.html2mdButton.copied {
    background-color: #07e65196;
    color: #104f2b;
}
button.html2mdButton.html2md-view.mdViewed {
    background-color: #ff980057;
    color: #5a3a0c;
}
/* 打卡框 */
.ui.bottom.attached.tab.segment.active {
    padding: 0px;
}
/* 视频bar */
.embed-responsive {
    height: max-content;
    padding-bottom: 0px;
}
.player_bar {
    margin: 2px;
    display: flex;
    justify-content: space-between;
}
.player_bar_go {
    cursor: pointer;
    width: 50px;
    color: #999;
    height: auto;
    font-size: 1.3vh;
    border-radius: 0.3rem;
    padding: 1px 5px;
    margin: 5px;
    border: none;
    background: linear-gradient(-225deg,#d5dbe4,#f8f8f8);
    box-shadow: inset 0 -2px 0 0 #cdcde6,inset 0 0 1px 1px #fff,0 1px 2px 1px rgba(30,35,90,.4);
    display: flex;
    justify-content: center;
    align-items: center;
}
button#player_bar_list_add_new_item_btn {
    height: 30px;
    width: 50px;
    background-color: #00aeec;
    color: #ffffff;
    font-size: 1.3vh;
    border-radius: 0rem 0.5rem 0.5rem 0rem;
    padding: 1px 5px;
    margin: 5px 5px 5px 0px;
    border: none;
    box-shadow: 0 0 1px #0000004d;
}
div#player_bar_list {
    display: grid;
    width: 100%;
    border-radius: 0.3rem 0rem 0rem 0.3rem;
    margin: 5px 0px 5px 0px;
    border: 1px dashed #00aeeccc;
}
div#player_bar_list input[type="radio"] {
    appearance: none;
    width: 0;
    height: 0;
    overflow: hidden;
}
div#player_bar_list input[type=radio]:focus {
    outline: 0px;
}
label.player_bar_ul_li_text {
    max-width: 100%;
    height: 90px;
    overflow-x: auto;
    font-weight: 400;
    margin: 0px 4px;
    box-shadow: 0 0 1px #0000004d;
    padding: 3px;
}
ul#player_bar_ul li button {
    background-color: #e6e6e6;
    color: #727378;
    height: 23px;
    font-size: 14px;
    border-radius: 0.3rem;
    padding: 1px 5px;
    margin: 5px;
    border: none;
    box-shadow: 0 0 1px #0000004d;
}
ul#player_bar_ul {
    list-style-type: none;
    padding-inline-start: 0px;
    display: flex;
    overflow-x: auto;
    max-width: 100%;
    margin: 0px;
}
ul#player_bar_ul li {
    height: 100px;
    width: 8vh;
    display: grid;
    overflow: hidden;
    margin: 0.4vh 0.2vh;
    min-width: 100px;
}
label.player_bar_ul_li_text:hover {
    background-color: #eae4dc24;
}
input[type="radio"]:checked + .player_bar_ul_li_text {
    background: linear-gradient(-225deg,#ede0bc,#f8f8f8);
    box-shadow: inset 0 0px 0 0 #cdcde6, inset 0 0px 1px 1px #fff, 0 0px 2px 1px rgb(30 35 90 / 32%);
}

ul#player_bar_ul::-webkit-scrollbar {
  width: 5px;
  height: 8px;
}
ul#player_bar_ul::-webkit-scrollbar-thumb {
    border-radius: 2px;
    border: 1px solid rgba(56,56,56,.3411764706);
    background-clip: padding-box;
    background-color: #a29bb84a;
    background-image: -webkit-linear-gradient(45deg,hsla(0deg,0%,100%,.4) 25%,transparent 0,transparent 50%,hsla(0deg,0%,100%,.4) 0,hsla(0deg,0%,100%,.4) 75%,transparent 0,transparent);
}
ul#player_bar_ul::-webkit-scrollbar-track {
  background-color: #f1f1f1;
  border-radius: 5px;
}

label.player_bar_ul_li_text::-webkit-scrollbar {
  width: 5px;
  height: 7px;
  background-color: #aaa;
}
label.player_bar_ul_li_text::-webkit-scrollbar-thumb {
    border: 1px solid rgba(56,56,56,.3411764706);
    background-clip: padding-box;
    background-color: #a29bb84a;
}
label.player_bar_ul_li_text::-webkit-scrollbar-track {
  background-color: #f1f1f1;
}
.player_bar_list_add_div {
    display: flex;
    height: 4vh;
    margin: 4px 2px;
}
input#player_bar_list_add_input {
    width: 100%;
    height: 30px;
    background-color: #ffffff;
    color: #727378;
    font-size: 1.3vh;
    border-radius: 0.3rem 0rem 0rem 0.3rem;
    padding: 1px 5px;
    margin: 5px 0px 5px 0px;
    border: 1px solid #00aeeccc;
    border-right: none;
    box-shadow: 0 0 1px #0000004d;
}
input#player_bar_list_add_input:focus-visible {
    border-width: 0.2vh;
    border-style: solid;
    border-color: #8bb2d9;
    outline: -webkit-focus-ring-color auto 0px;
}
button#player_bar_list_add_new_item_btn.added {
    background-color: #07e65196;
    color: #104f2b;
}
div#player_bar_go.gone {
    color: #3f5a14;
    font-weight: 600;
    background: linear-gradient(-225deg,#9CCC65,#E6EE9C);
    box-shadow: inset 0 -2px 0 0 #cde3e6, inset 0 0 1px 1px #c6fd7d, 0 1px 2px 1px rgb(30 90 44 / 40%);
}
/* bar修改菜单 */
div#player_bar_menu {
    position: absolute;
    border-width: 2px;
    border-style: solid;
    border-color: #8bb2d9;
    box-shadow: 1px 1px 4px 0px #0000004d;
}
div#player_bar_menu_edit {
    cursor: pointer;
    background-color: #ffffff;
    color: black;
    box-shadow: inset 0px -1px 0px 0px #8bb2d9;
    padding: 2px 6px;
}
div#player_bar_menu_delete {
    cursor: pointer;
    background-color: #ffff;
    box-shadow: inset 0px 1px 0px 0px #8bb2d9;
    color: black;
    padding: 2px 6px;
}
div#player_bar_menu_edit:hover {
    background-color: #00aeec;
    color: white;
}
div#player_bar_menu_delete:hover {
    background-color: #FF5722;
    color: white;
}
`);

// 添加复制按钮
function addCopy(){
    // 获取所有 .hljs 中的代码块
    const codeBlocks = document.querySelectorAll('.hljs code');

    // 循环遍历每个代码块
    codeBlocks.forEach(codeBlock => {
        // 创建一个 span 元素，并设置样式
        const beforeButton = document.createElement('span');
        beforeButton.textContent = "Copy";
        beforeButton.className = 'copy-button';
        // 在代码块前面插入按钮
        codeBlock.parentNode.insertBefore(beforeButton, codeBlock.nextSibling);
        // 为按钮添加点击事件
        beforeButton.addEventListener('click', event => {
            // 创建临时文本域
            const textarea = document.createElement('textarea');
            textarea.value = codeBlock.textContent.replace(/\n+$/, '');
            document.body.appendChild(textarea);
            textarea.select();
            document.execCommand('copy');
            document.body.removeChild(textarea);


            // 更新复制按钮文本
            beforeButton.classList.add('copied');
            beforeButton.textContent = "Copied";
            setTimeout(() => {
                beforeButton.classList.remove('copied');
                beforeButton.textContent = "Copy";
            }, 2000);
        }, false);
    });
}

// 移除复制按钮
function removeCopy(){
    var elements = document.querySelectorAll('.hljs .copy-button');
    for (var i = 0; i < elements.length; i++) {
        elements[i].parentNode.removeChild(elements[i]);
    }

}

document.addEventListener('DOMContentLoaded', function() {
    // 让某些链接在新窗口打开
    var regExps = [
        /常用代码模板/,
        /example/,
        /test/
    ];
    var aTags = document.getElementsByTagName('a');
    for (var i = 0; i < aTags.length; i++) {
        for (var j = 0; j < regExps.length; j++) {
            if (regExps[j].test(aTags[i].textContent)) {
                aTags[i].setAttribute('target', '_blank');
                break;
            }
        }
    }
    // 自动恢复进度条
    setTimeout(function() {
        try {
            document.querySelector('.play-jump').click();
        } catch (error) {
            // do nothing
        }
    }, 3000);
    // 复制按钮
    addCopy();
    // 移除广告元素
    let ADidADList = ["1024-activity","test"];
    ADtraverseDom(document.body);
    function ADtraverseDom(node) {
        if (node.nodeType === Node.ELEMENT_NODE && ADidADList.includes(node.id)) {
            node.parentNode.removeChild(node);
        } else {
            for (let i = 0; i < node.childNodes.length; i++) {
                ADtraverseDom(node.childNodes[i]);
            }
        }
    }
    // 修改打卡页代码框默认高度
    var element = document.getElementById("martor-content");
    if(element){
        var style = window.getComputedStyle(element);
        element.style.height = "55vh";
    }
});

// MarkDown

document.addEventListener('DOMContentLoaded', function() {
    let debug = false; // whether to enable on editor

    let turndownService = new TurndownService();

    turndownService.keep(['del']);

    // code block
    turndownService.addRule('pre', {
        filter: 'pre',
        replacement: function (content, node) {
            let t = $(node).attr("class").split(/\s+/).slice(-1);
            if (t == "hljs") t = "";
            return "```" + t + "\n" + content.trim() + "\n```";
        }
    });

    // remove <script> math
    turndownService.addRule('remove-script', {
        filter: function (node, options) {
            return node.tagName.toLowerCase() == "script" && node.type.startsWith("math/tex");
        },
        replacement: function (content, node) {
            return "";
        }
    });

    // inline math
    turndownService.addRule('inline-math', {
        filter: function (node, options) {
            return node.tagName.toLowerCase() == "span" && node.className == "MathJax";
        },
        replacement: function (content, node) {
            return "$ " + $(node).next().text() + " $";
        }
    });

    // block math
    turndownService.addRule('block-math', {
        filter: function (node, options) {
            return node.tagName.toLowerCase() == "div" && node.className == "MathJax_Display";
        },
        replacement: function (content, node) {
            return "\n$$\n" + $(node).next().text() + "\n$$\n";
        }
    });

    // add buttons
    $("div[data-tab='preview-tab-content']").each(function() {
        if (debug || $(this).prev().attr('data-tab') != "editor-tab-content")
            $(this).before(
                "<div class='html2md-panel'> <button class='html2mdButton html2md-view'>MarkDown视图</button> <button class='html2mdButton html2md-cb'>Copy</button> </div>"
            );
    });

    $(".html2md-cb").click(function() {
        let target = $(this).parent().next().get(0);
        if (!target.markdown){
            removeCopy();
            target.markdown = turndownService.turndown($(target).html());
            addCopy();
        }
        const textarea = document.createElement('textarea');
        textarea.value = target.markdown;
        document.body.appendChild(textarea);
        textarea.select();
        document.execCommand('copy');
        document.body.removeChild(textarea);
        // console.log(markdown);
        $(this).addClass("copied");
        $(this).text("Copied");
        // 更新复制按钮文本
        setTimeout(() => {
            $(this).removeClass("copied");
            $(this).text("Copy");
        }, 2000);
    });

    $(".html2md-view").click(function() {
        let target = $(this).parent().next().get(0);
        if (target.viewmd) {
            target.viewmd = false;
            $(this).text("MarkDown视图");
            $(this).removeClass("mdViewed");
            $(target).html(target.original_html);
            addCopy();
        } else {
            target.viewmd = true;
            removeCopy();
            if (!target.original_html)
                target.original_html = $(target).html();
            if (!target.markdown)
                target.markdown = turndownService.turndown($(target).html());
            $(this).text("原始内容");
            $(this).addClass("mdViewed");
            $(target).html(`<span oninput="$(this).parent().get(0).markdown=this.value;" style="width:auto; height:auto; white-space: pre;"> ${target.markdown} </span>`);
        }
    });
});


// 播放器添加节点标签功能
function addPlayerBar(player_bar_video){
    // 创建元素
    var player = document.querySelector('.prism-player');
    var player_bar = document.createElement('div');
    player_bar.classList.add('player_bar');
    player.parentNode.insertBefore(player_bar, player.nextSibling);

    var player_bar_list = document.createElement('div');
    player_bar_list.classList.add('player_bar_list');
    player_bar_list.setAttribute("id","player_bar_list");
    player_bar.appendChild(player_bar_list);

    var player_bar_ul = document.createElement('ul');
    player_bar_ul.classList.add('player_bar_ul');
    player_bar_ul.setAttribute("id","player_bar_ul");
    player_bar_list.appendChild(player_bar_ul);

    var player_bar_go = document.createElement('div');
    player_bar_go.classList.add('player_bar_go');
    player_bar_go.setAttribute("id","player_bar_go");
    var player_bar_goText = document.createTextNode("Go!");
    player_bar_go.appendChild(player_bar_goText);
    player_bar.appendChild(player_bar_go);

    var player_bar_list_add_div = document.createElement('div');
    player_bar_list_add_div.classList.add('player_bar_list_add_div');
    player_bar.parentNode.insertBefore(player_bar_list_add_div, player_bar.nextSibling);

    var player_bar_list_add_input = document.createElement('input');
    player_bar_list_add_input.classList.add('player_bar_list_add_input');
    player_bar_list_add_input.setAttribute("type","text");
    player_bar_list_add_input.setAttribute("id","player_bar_list_add_input");
    player_bar_list_add_input.setAttribute("placeholder","在这里输入备注内容，点击Add添加一个时间点标记；选中一个标记，点击Go跳转；右键标记，修改或删除");
    player_bar_list_add_div.appendChild(player_bar_list_add_input);

    var player_bar_list_add_button = document.createElement('button');
    player_bar_list_add_button.classList.add('player_bar_list_add_button');
    player_bar_list_add_button.setAttribute("id","player_bar_list_add_new_item_btn");
    var player_bar_list_add_buttonText = document.createTextNode("Add");
    player_bar_list_add_button.appendChild(player_bar_list_add_buttonText);
    player_bar_list_add_div.appendChild(player_bar_list_add_button);

    //存储cookie的名称和标识符
    const COOKIE_NAME = "listItems";
    const PAGE_IDENTIFIER = window.location.href;
    //计数器
    let counter = 0;

    //获取cookie中的数据
    function getListData() {
        let data = getCookie(COOKIE_NAME);
        if (!data) {
            data = {};
        } else {
            data = JSON.parse(data);
        }
        if (!data[PAGE_IDENTIFIER]) {
            data[PAGE_IDENTIFIER] = [];
        }
        return data[PAGE_IDENTIFIER];
    }

    //将数据保存到cookie中
    function saveListData(data) {
        let cookieData = getCookie(COOKIE_NAME);
        if (cookieData) {
            cookieData = JSON.parse(cookieData);
        } else {
            cookieData = {};
        }
        cookieData[PAGE_IDENTIFIER] = data;
        setCookie(COOKIE_NAME, JSON.stringify(cookieData), 36500);
    }

    //创建新的li元素
    function createListItemElement(text) {
        const li = document.createElement("li");
        const radio = document.createElement("input");
        radio.type = "radio";
        radio.name = "player_bar_ul";
        radio.id = counter++;
        li.appendChild(radio);
        const label = document.createElement("label");
        label.textContent = text;
        label.classList.add("player_bar_ul_li_text");
        label.setAttribute("for", radio.id);
        li.appendChild(label);
        li.addEventListener("contextmenu", (event) => {
            //阻止默认右键菜单
            event.preventDefault();
            //显示菜单
            menu.style.display = "block";
            menu.style.left = event.pageX + "px";
            menu.style.top = event.pageY + "px";

            const deleteItem = document.getElementById("player_bar_menu_delete");
            const editItem = document.getElementById("player_bar_menu_edit");

            function onDelete() {
                deleteItem.removeEventListener("click", onDelete);
                const list = document.getElementById("player_bar_ul");
                const index = Array.from(list.children).indexOf(li);
                const data = getListData();
                data.splice(index, 1);
                saveListData(data);
                li.remove();
                menu.style.display = "none";
            }

            function onEdit() {
                editItem.removeEventListener("click", onEdit);
                const list = document.getElementById("player_bar_ul");
                const index = Array.from(list.children).indexOf(li);
                const data = getListData();
                label.textContent = data[index].text;
                const text = prompt("请输入修改后的内容", label.textContent);
                if (text !== undefined && text!==null) {
                    data[index].text = text.trim();
                    saveListData(data);
                }
                renderList();//重新渲染
                menu.style.display = "none";
            }

            deleteItem.addEventListener("click", onDelete);
            editItem.addEventListener("click", onEdit);

            document.addEventListener("click", (event) => {
                //点击菜单外部，隐藏菜单并移除事件监听器
                if (!menu.contains(event.target)) {
                    menu.style.display = "none";
                    // 移除所有事件监听器
                    deleteItem.removeEventListener("click", onDelete);
                    editItem.removeEventListener("click", onEdit);
                }
            });
        });
        return li;
    }

    //渲染列表
    function renderList() {
        const listContainer = document.getElementById("player_bar_list");
        const list = document.getElementById("player_bar_ul");
        list.innerHTML = "";
        const data = getListData();
        data.forEach((item) => {
            list.appendChild(createListItemElement(item.text));
        });
    }

    //新增列表项
    function addNewItem() {
        const input = document.getElementById("player_bar_list_add_input");
        const text = input.value.trim();
        if (text === "") {
            alert("请输入内容");
            return;
        }
        const data = getListData();
        data.push({text: text, time: player_bar_video.currentTime});
        saveListData(data);
        const list = document.getElementById("player_bar_ul");
        list.appendChild(createListItemElement(text));
        input.value = "";
    }

    //设置cookie
    function setCookie(name, value, days) {
        let cookie = `${name}=${encodeURIComponent(value)}; path=/`;
        if (days) {
            const expireDate = new Date();
            expireDate.setDate(expireDate.getDate() + days);
            cookie += `; expires=${expireDate.toUTCString()}`;
        }
        document.cookie = cookie;
    }

    //获取cookie
    function getCookie(name) {
        const cookies = document.cookie.split("; ");
        for (let i = 0; i < cookies.length; i++) {
            const [cookieName, cookieValue] = cookies[i].split("=");
            if (cookieName === name) {
                return decodeURIComponent(cookieValue);
            }
        }
        return null;
    }

    //为添加按钮添加事件处理程序
    var player_bar_add_button = document.getElementById("player_bar_list_add_new_item_btn")
    player_bar_add_button.addEventListener("click", ()=>{
        addNewItem();
        player_bar_add_button.classList.add('added');
        player_bar_add_button.textContent = "Added";
        setTimeout(() => {
            player_bar_add_button.classList.remove('added');
            player_bar_add_button.textContent = "Add";
        }, 2000);
    });

    //在页面加载时渲染列表
    renderList();

    //为跳转按钮添加事件处理程序
    var click_player_bar_go = document.getElementById("player_bar_go");
    click_player_bar_go.addEventListener("click", () => {
        const selected = document.querySelector('input[name="player_bar_ul"]:checked');
        if (selected) {
            const data = getListData();
            const index = Array.from(selected.parentNode.parentNode.children).indexOf(selected.parentNode);
            player_bar_video.currentTime = data[index].time;
            click_player_bar_go.classList.add('gone');
            click_player_bar_go.textContent = "Gone";
            setTimeout(() => {
                click_player_bar_go.classList.remove('gone');
                click_player_bar_go.textContent = "Go!";
            }, 2000);
        } else {
            alert("请选择一项");
        }
    });

    //创建自定义菜单
    const menu = document.createElement("div");
    menu.id = "player_bar_menu";
    menu.style.display = "none";
    menu.innerHTML = `
  <div id="player_bar_menu_edit">修改</div>
  <div id="player_bar_menu_delete">删除</div>
`;
    document.body.appendChild(menu);
}

window.addEventListener('load', function() {
    var player_bar_video = document.querySelector('video');
    if(player_bar_video!=null)addPlayerBar(player_bar_video);
});