// ==UserScript==
// @name         Lecd
// @namespace    https://www.ruxf.com/
// @version      0.1
// @description  Copy leetcode problem
// @author       You
// @match        https://leetcode-cn.com/problems/*/
// @icon         https://www.google.com/s2/favicons?sz=64&domain=leetcode-cn.com
// @grant        none
// @license      MIT
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    // Your code here...
    console.log('Tampermonkey loaded');
    function onConsoleProblem() {
        const title = document.querySelector(`h4[data-cypress="QuestionTitle"]`).innerText;
        const hard = document.querySelector('span[data-degree]').innerText;
        const content = document.querySelector('div.notranslate:not(#question-detail-main-tabs)').innerHTML
        .replace(/(\<\/?code\>)/g, '`')
        // 替换列表
        .replace(/\t/g, '')
        .replace(/<li>/g, '- ')
        // 替换代码块
        .replace(/<pre>/g, '```bash\n')
        .replace(/<\/pre>/g, '\n```')
        .replace(/&nbsp;/g, ' ')
        .replace(/<\/?.+?>/g, '')
        .replace(/&gt;/g, '>')
        .replace(/&lt;/g, '<')
        const problem = `# ${title}\n\n难度：\`${hard}\`\n\n${content}`;
        if (navigator.clipboard) {
            // clipboard api 复制
            navigator.clipboard.writeText(problem);
        } else {
            var textarea = document.createElement('textarea');
            document.body.appendChild(textarea);
            // 隐藏此输入框
            textarea.style.position = 'fixed';
            textarea.style.clip = 'rect(0 0 0 0)';
            textarea.style.top = '10px';
            // 赋值
            textarea.value = problem;
            // 选中
            textarea.select();
            // 复制
            document.execCommand('copy', true);
            // 移除输入框
            document.body.removeChild(textarea);
        }
        btn.innerText = 'Copied';
    }
    const btn = document.createElement('button');
    btn.innerText = 'Copy';
    btn.style.position = 'fixed';
    btn.style.top = 0;
    btn.style.left = 0;
    btn.addEventListener('click', onConsoleProblem);
    document.body.appendChild(btn);
})();