// ==UserScript==
// @name         종합 웹 크롤러 8.0
// @namespace    http://tampermonkey.net/
// @version      8.0
// @description  고급 기능을 갖춘 웹 크롤러로 검색 결과를 실시간으로 수집하고 표시 (대폭 개선된 버전)
// @author       YourName
// @match        *://www.google.com/search*
// @match        *://www.bing.com/search*
// @match        *://search.daum.net/search*
// @match        *://search.naver.com/search*
// @match        *://search.yahoo.com/search*
// @match        *://duckduckgo.com/*
// @match        *://www.startpage.com/do/search*
// @match        *://www.ecosia.org/search*
// @match        *://www.qwant.com/*
// @match        *://ahmia.fi/*
// @match        *://torchsearch.de/*
// @match        *://notracker.org/*
// @grant        GM_xmlhttpRequest
// @grant        GM_addStyle
// @grant        GM_setValue
// @grant        GM_getValue
// @grant        GM_notification
// @connect      *
// @require      https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.18.5/xlsx.full.min.js
// @require      https://cdn.jsdelivr.net/npm/chart.js
// ==/UserScript==

(function() {
    'use strict';

    GM_addStyle(`
        #crawler-container {
            position: fixed;
            top: 10px;
            right: 10px;
            background-color: #f0f4f8;
            border: 2px solid #4CAF50;
            padding: 20px;
            z-index: 10000;
            width: 900px;
            max-height: 85vh;
            overflow: hidden;
            box-shadow: 0 6px 20px rgba(0,0,0,0.3);
            border-radius: 10px;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            font-size: 15px;
            resize: both;
            display: flex;
            flex-direction: column;
            transition: all 0.3s ease;
        }
        #crawler-container header {
            cursor: move;
            background-color: #4CAF50;
            color: white;
            padding: 10px 15px;
            border-radius: 8px 8px 0 0;
            text-align: center;
            font-size: 22px;
            font-weight: bold;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        #crawler-container header .title {
            flex-grow: 1;
        }
        #crawler-container header .close-btn {
            cursor: pointer;
            font-size: 26px;
            color: #ff6666;
            margin-left: 15px;
        }
        #crawler-container .tabs {
            display: flex;
            border-bottom: 3px solid #ccc;
            margin-top: 15px;
        }
        #crawler-container .tab {
            flex: 1;
            padding: 12px;
            text-align: center;
            cursor: pointer;
            background-color: #e8e8e8;
            border-right: 1px solid #bbb;
            font-weight: bold;
            transition: background-color 0.3s, color 0.3s;
        }
        #crawler-container .tab:last-child {
            border-right: none;
        }
        #crawler-container .tab.active {
            background-color: #ffffff;
            border-bottom: 4px solid #4CAF50;
            color: #4CAF50;
        }
        #crawler-container .tab-content {
            display: none;
            padding: 20px;
            overflow-y: auto;
            flex-grow: 1;
        }
        #crawler-container .tab-content.active {
            display: block;
        }
        #crawler-container button {
            padding: 10px 15px;
            margin: 6px 4px;
            border: none;
            border-radius: 5px;
            background-color: #4CAF50;
            color: white;
            cursor: pointer;
            transition: background-color 0.3s;
            font-size: 15px;
        }
        #crawler-container button:hover {
            background-color: #45a049;
        }
        #crawler-container button.export-btn {
            background-color: #2196F3;
        }
        #crawler-container button.export-btn:hover {
            background-color: #0b7dda;
        }
        #crawler-container button.pause-btn {
            background-color: #FF9800;
        }
        #crawler-container button.pause-btn:hover {
            background-color: #e68a00;
        }
        #crawler-container .options,
        #crawler-container .filters,
        #crawler-container .exclude-domains,
        #crawler-container .advanced-options,
        #crawler-container .controls,
        #crawler-container .search-engines {
            margin-bottom: 20px;
        }
        #crawler-container .options label,
        #crawler-container .advanced-options label,
        #crawler-container .controls label,
        #crawler-container .search-engines label {
            margin-right: 20px;
            display: inline-flex;
            align-items: center;
            font-weight: normal;
        }
        #crawler-container .options input[type="checkbox"],
        #crawler-container .advanced-options input[type="checkbox"],
        #crawler-container .controls input[type="number"],
        #crawler-container .search-engines select {
            margin-right: 8px;
        }
        #crawler-container input[type="text"],
        #crawler-container textarea,
        #crawler-container input[type="number"],
        #crawler-container select {
            width: 100%;
            padding: 10px;
            margin: 6px 0 12px 0;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-size: 15px;
        }
        #crawler-container table {
            border-collapse: collapse;
            width: 100%;
            margin-top: 15px;
            font-size: 14px;
        }
        #crawler-container th, #crawler-container td {
            padding: 12px;
            border: 1px solid #ddd;
            text-align: left;
            vertical-align: top;
        }
        #crawler-container th {
            background-color: #4CAF50;
            color: white;
            position: sticky;
            top: 0;
            z-index: 1;
            cursor: pointer;
        }
        #crawler-container .log {
            max-height: 250px;
            overflow-y: auto;
            background-color: #e6f7ff;
            padding: 15px;
            border: 1px solid #91d5ff;
            border-radius: 5px;
            font-size: 14px;
            white-space: pre-wrap;
        }
        #crawler-container .controls,
        #crawler-container .options,
        #crawler-container .advanced-options,
        #crawler-container .notification-area,
        #crawler-container .search-engines {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
        }
        #crawler-container .filters label,
        #crawler-container .exclude-domains label {
            display: block;
            margin-bottom: 8px;
            font-weight: bold;
        }
        #crawler-container progress {
            width: 85%;
            height: 25px;
            margin-right: 15px;
            border-radius: 5px;
        }
        #crawler-container .status {
            margin-top: 15px;
            font-weight: bold;
            font-size: 16px;
        }
        #crawler-container .chart-container {
            position: relative;
            height: 300px;
            width: 100%;
            margin-top: 25px;
        }
        #crawler-container .notification-area {
            flex-direction: row;
            align-items: center;
            width: 100%;
        }
        @media (max-width: 1000px) {
            #crawler-container {
                width: 95%;
                right: 2.5%;
            }
            #crawler-container .controls,
            #crawler-container .options,
            #crawler-container .advanced-options,
            #crawler-container .notification-area,
            #crawler-container .search-engines {
                flex-direction: column;
                align-items: flex-start;
            }
            #crawler-container .search-engines select {
                width: 100%;
            }
            #crawler-container .controls input[type="number"],
            #crawler-container .controls input[type="number"] {
                width: 100%;
            }
            #crawler-container progress {
                width: 100%;
            }
        }
    `);

    const container = document.createElement('div');
    container.id = 'crawler-container';
    container.innerHTML = `
        <header>
            <span class="title">🔥 웹 크롤러 8.0</span>
            <span class="close-btn" title="닫기">&times;</span>
        </header>
        <div class="tabs">
            <div class="tab active" data-tab="settings">설정</div>
            <div class="tab" data-tab="results">결과</div>
            <div class="tab" data-tab="logs">로그</div>
            <div class="tab" data-tab="about">정보</div>
        </div>
        <div class="tab-content active" id="settings">
            <div class="notification-area">
                <button id="startBtn" title="크롤링 시작">▶️ 시작</button>
                <button id="pauseBtn" class="pause-btn" title="크롤링 일시정지/재개">⏸️ 일시정지</button>
                <button id="stopBtn" title="크롤링 중지">⏹️ 중지</button>
                <button id="resetBtn" title="크롤링 초기화">🔄 초기화</button>
                <button id="exportBtn" class="export-btn" title="결과 내보내기">💾 내보내기</button>
                <button id="clearLogsBtn" title="로그 초기화">🧹 로그 초기화</button>
            </div>
            <div class="search-engines">
                <label for="searchEngineSelect">검색 엔진 선택:</label>
                <select id="searchEngineSelect">
                    <option value="google" selected>Google</option>
                    <option value="bing">Bing</option>
                    <option value="daum">Daum</option>
                    <option value="naver">Naver</option>
                    <option value="yahoo">Yahoo</option>
                    <option value="duckduckgo">DuckDuckGo</option>
                    <option value="startpage">StartPage</option>
                    <option value="ecosia">Ecosia</option>
                    <option value="qwant">Qwant</option>
                    <option value="ahmia">Ahmia (Tor)</option>
                    <option value="torch">Torch (Tor)</option>
                    <option value="notracker">NOTRACKER (Tor)</option>
                </select>
            </div>
            <div class="options">
                <label><input type="checkbox" id="toggleHTML" checked> HTML 가져오기</label>
                <label><input type="checkbox" id="toggleImages" checked> 이미지 가져오기</label>
                <label><input type="checkbox" id="toggleAds" checked> 광고 제외</label>
            </div>
            <div class="filters">
                <label for="filterInput">필터 단어 (정규식 또는 단어, 쉼표로 구분):</label>
                <input type="text" id="filterInput" placeholder="예: 기부, 광고, /promo/i">
            </div>
            <div class="exclude-domains">
                <label for="excludeDomainsInput">제외할 도메인 (쉼표로 구분):</label>
                <input type="text" id="excludeDomainsInput" placeholder="예: facebook.com, youtube.com">
            </div>
            <div class="advanced-options">
                <label for="duplicateThreshold">중복 허용 횟수:</label>
                <input type="number" id="duplicateThreshold" value="2" min="1" style="width: 90px;">
            </div>
            <div class="controls">
                <label for="retryAttempts">재시도 횟수:</label>
                <input type="number" id="retryAttempts" value="3" min="1" style="width: 100px;">
                <label for="retryInterval">재시도 간격 (ms):</label>
                <input type="number" id="retryInterval" value="500" min="100" style="width: 120px;">
            </div>
            <div style="margin-top:20px;">
                <label for="progressBar">진행률:</label>
                <progress id="progressBar" value="0" max="100"></progress>
                <span id="progressText">0%</span>
            </div>
            <div class="status">
                현재 페이지: <span id="currentPage">0</span> /
                총 페이지: <span id="totalPages">0</span>
                <br>
                방문된 사이트: <span id="visitedCount">0</span>
                <br>
                경과 시간: <span id="elapsedTime">00:00:00</span>
                <br>
                예상 남은 시간: <span id="remainingTime">00:00:00</span>
            </div>
            <div class="chart-container">
                <canvas id="crawlChart"></canvas>
            </div>
        </div>
        <div class="tab-content" id="results">
            <div style="margin-top:15px; max-height: 450px; overflow: auto;">
                <table id="resultsTable">
                    <thead>
                        <tr>
                            <th data-sort="0">사이트 이름 &#x25B2;&#x25BC;</th>
                            <th data-sort="1">주소 &#x25B2;&#x25BC;</th>
                            <th data-sort="2">설명 &#x25B2;&#x25BC;</th>
                            <th>이미지</th>
                            <th>HTML 링크</th>
                            <th>WHOIS 정보</th>
                            <th data-sort="6">페이지 로딩 시간 (ms) &#x25B2;&#x25BC;</th>
                        </tr>
                    </thead>
                    <tbody id="resultsBody">
                    </tbody>
                </table>
            </div>
            <div style="margin-top:10px;">
                <input type="text" id="searchResultsInput" placeholder="결과 검색...">
            </div>
        </div>
        <div class="tab-content" id="logs">
            <div class="log" id="log">
                <strong>로그:</strong>
            </div>
        </div>
        <div class="tab-content" id="about">
            <h2>웹 크롤러 8.0 정보</h2>
            <p>종합 웹 크롤러는 다양한 검색 엔진에서 실시간으로 검색 결과를 수집하고 분석할 수 있는 도구입니다. 사용자의 편의성과 데이터 가독성을 고려하여 대폭 개선된 버전입니다.</p>
            <ul>
                <li>지원하는 검색 엔진: Google, Bing, Daum, Naver, Yahoo, DuckDuckGo, StartPage, Ecosia, Qwant, Ahmia (Tor), Torch (Tor), NOTRACKER (Tor)</li>
                <li>실시간 검색어 감지 및 크롤링</li>
                <li>고급 필터링 옵션 제공</li>
                <li>결과를 XLSX, CSV, JSON 형식으로 내보내기</li>
                <li>시각화된 데이터 차트 제공</li>
                <li>사용자 친화적인 인터페이스 및 반응형 디자인</li>
                <li>결과 테이블 정렬 및 검색 기능 추가</li>
                <li>더 자세한 로그 제공</li>
                <li>페이지 로딩 시간 측정 및 WHOIS 정보 연동</li>
                <li>다양한 알림 방식 지원</li>
                <li>자동 스크롤 및 실시간 업데이트</li>
                <li>고급 에러 핸들링 및 재시도 로직 강화</li>
                <li>로그 초기화 기능 추가</li>
                <li>결과 검색 기능 추가</li>
            </ul>
            <p><strong>버전:</strong> 8.0</p>
            <p><strong>제작자:</strong> YourName</p>
            <p><strong>문의:</strong> your.email@example.com</p>
        </div>
    `;
    document.body.appendChild(container);

    // 드래그 기능
    (function makeDraggable(elmnt) {
        const header = elmnt.querySelector('header');
        const closeBtn = elmnt.querySelector('.close-btn');
        let pos1 = 0, pos2 = 0, pos3 = 0, pos4 = 0;
        header.onmousedown = dragMouseDown;

        closeBtn.onclick = () => {
            elmnt.style.display = 'none';
            log('🗑 크롤러 창을 닫았습니다.');
        }

        function dragMouseDown(e) {
            e = e || window.event;
            e.preventDefault();
            pos3 = e.clientX;
            pos4 = e.clientY;
            document.onmouseup = closeDragElement;
            document.onmousemove = elementDrag;
        }

        function elementDrag(e) {
            e = e || window.event;
            e.preventDefault();
            pos1 = pos3 - e.clientX;
            pos2 = pos4 - e.clientY;
            pos3 = e.clientX;
            pos4 = e.clientY;
            elmnt.style.top = (elmnt.offsetTop - pos2) + "px";
            elmnt.style.left = (elmnt.offsetLeft - pos1) + "px";
        }

        function closeDragElement() {
            document.onmouseup = null;
            document.onmousemove = null;
        }
    })(container);

    // 탭 설정
    (function setupTabs() {
        const tabs = container.querySelectorAll('.tab');
        const tabContents = container.querySelectorAll('.tab-content');

        tabs.forEach(tab => {
            tab.addEventListener('click', () => {
                tabs.forEach(t => t.classList.remove('active'));
                tab.classList.add('active');

                const target = tab.getAttribute('data-tab');
                tabContents.forEach(content => {
                    if(content.id === target){
                        content.classList.add('active');
                    } else {
                        content.classList.remove('active');
                    }
                });
            });
        });
    })();

    // 변수 초기화
    let isRunning = false;
    let isPaused = false;
    let currentPage = 1;
    let totalPages = 0;
    let results = [];
    let searchQuery = '';
    let searchEngine = 'google';
    let visitedLinks = new Map();
    let logMessages = [];
    let filterPatterns = [];
    let excludeDomains = [];
    let duplicateThreshold = 2;
    let retryAttempts = 3;
    let retryInterval = 500;
    let startTime = null;
    let elapsedInterval = null;
    let crawlChart = null;
    let crawlData = {
        labels: [],
        datasets: [{
            label: '방문 횟수',
            data: [],
            backgroundColor: 'rgba(75, 192, 192, 0.6)',
            borderColor: 'rgba(75, 192, 192, 1)',
            borderWidth: 1
        },
        {
            label: '평균 페이지 로딩 시간 (ms)',
            data: [],
            backgroundColor: 'rgba(153, 102, 255, 0.6)',
            borderColor: 'rgba(153, 102, 255, 1)',
            borderWidth: 1
        }]
    };

    // 요소 참조
    const startBtn = document.getElementById('startBtn');
    const pauseBtn = document.getElementById('pauseBtn');
    const stopBtn = document.getElementById('stopBtn');
    const resetBtn = document.getElementById('resetBtn');
    const exportBtn = document.getElementById('exportBtn');
    const clearLogsBtn = document.getElementById('clearLogsBtn');
    const progressBar = document.getElementById('progressBar');
    const progressText = document.getElementById('progressText');
    const resultsBody = document.getElementById('resultsBody');
    const logContainer = document.getElementById('log');
    const currentPageElem = document.getElementById('currentPage');
    const totalPagesElem = document.getElementById('totalPages');
    const toggleHTML = document.getElementById('toggleHTML');
    const toggleImages = document.getElementById('toggleImages');
    const toggleAds = document.getElementById('toggleAds');
    const filterInput = document.getElementById('filterInput');
    const excludeDomainsInput = document.getElementById('excludeDomainsInput');
    const duplicateThresholdInput = document.getElementById('duplicateThreshold');
    const retryAttemptsInput = document.getElementById('retryAttempts');
    const retryIntervalInput = document.getElementById('retryInterval');
    const visitedCountElem = document.getElementById('visitedCount');
    const elapsedTimeElem = document.getElementById('elapsedTime');
    const remainingTimeElem = document.getElementById('remainingTime');
    const crawlChartCtx = document.getElementById('crawlChart').getContext('2d');
    const searchEngineSelect = document.getElementById('searchEngineSelect');
    const searchResultsInput = document.getElementById('searchResultsInput');

    // 이벤트 리스너 등록
    startBtn.addEventListener('click', startCrawling);
    pauseBtn.addEventListener('click', togglePause);
    stopBtn.addEventListener('click', stopCrawling);
    resetBtn.addEventListener('click', resetCrawling);
    exportBtn.addEventListener('click', exportResults);
    clearLogsBtn.addEventListener('click', clearLogs);
    filterInput.addEventListener('input', updateFilterPatterns);
    excludeDomainsInput.addEventListener('input', updateExcludeDomains);
    duplicateThresholdInput.addEventListener('change', updateDuplicateThreshold);
    retryAttemptsInput.addEventListener('change', updateRetryAttempts);
    retryIntervalInput.addEventListener('change', updateRetryInterval);
    searchEngineSelect.addEventListener('change', updateSearchEngine);
    searchResultsInput.addEventListener('input', filterResults);

    window.addEventListener('beforeunload', () => {
        resetCrawling();
    });

    // 로그 및 크롤 데이터 로드
    loadLogs();
    loadCrawlData();
    loadSettings();

    // 차트 초기화 함수
    function initializeChart() {
        crawlChart = new Chart(crawlChartCtx, {
            type: 'bar',
            data: crawlData,
            options: {
                responsive: true,
                maintainAspectRatio: false,
                scales: {
                    y: {
                        beginAtZero: true,
                        ticks: {
                            precision:0
                        }
                    }
                },
                plugins: {
                    legend: {
                        display: true,
                        position: 'top'
                    },
                    tooltip: {
                        enabled: true
                    }
                }
            }
        });
    }
    initializeChart();

    // 설정 로드
    function loadSettings() {
        const storedSearchEngine = GM_getValue('searchEngine', 'google');
        searchEngine = storedSearchEngine;
        searchEngineSelect.value = searchEngine;

        const storedToggleHTML = GM_getValue('toggleHTML', true);
        toggleHTML.checked = storedToggleHTML;

        const storedToggleImages = GM_getValue('toggleImages', true);
        toggleImages.checked = storedToggleImages;

        const storedToggleAds = GM_getValue('toggleAds', true);
        toggleAds.checked = storedToggleAds;

        const storedDuplicateThreshold = GM_getValue('duplicateThreshold', 2);
        duplicateThreshold = storedDuplicateThreshold;
        duplicateThresholdInput.value = duplicateThreshold;

        const storedRetryAttempts = GM_getValue('retryAttempts', 3);
        retryAttempts = storedRetryAttempts;
        retryAttemptsInput.value = retryAttempts;

        const storedRetryInterval = GM_getValue('retryInterval', 500);
        retryInterval = storedRetryInterval;
        retryIntervalInput.value = retryInterval;

        const storedFilterInput = GM_getValue('filterInput', '');
        filterInput.value = storedFilterInput;
        updateFilterPatterns();

        const storedExcludeDomainsInput = GM_getValue('excludeDomainsInput', '');
        excludeDomainsInput.value = storedExcludeDomainsInput;
        updateExcludeDomains();
    }

    // 설정 저장 함수
    function saveSettings() {
        GM_setValue('searchEngine', searchEngine);
        GM_setValue('toggleHTML', toggleHTML.checked);
        GM_setValue('toggleImages', toggleImages.checked);
        GM_setValue('toggleAds', toggleAds.checked);
        GM_setValue('duplicateThreshold', duplicateThreshold);
        GM_setValue('retryAttempts', retryAttempts);
        GM_setValue('retryInterval', retryInterval);
        GM_setValue('filterInput', filterInput.value.trim());
        GM_setValue('excludeDomainsInput', excludeDomainsInput.value.trim());
    }

    // 검색 엔진 변경 시 처리
    function updateSearchEngine() {
        searchEngine = searchEngineSelect.value;
        GM_setValue('searchEngine', searchEngine);
        log(`🔄 검색 엔진 변경: ${capitalizeFirstLetter(searchEngine)}`);
    }

    // 다양한 설정 변경 시 설정 저장
    toggleHTML.addEventListener('change', saveSettings);
    toggleImages.addEventListener('change', saveSettings);
    toggleAds.addEventListener('change', saveSettings);
    filterInput.addEventListener('change', saveSettings);
    excludeDomainsInput.addEventListener('change', saveSettings);

    // 로그 로드
    function loadLogs() {
        const storedLogs = GM_getValue('crawlerLogs', []);
        if (storedLogs.length > 0) {
            logMessages = JSON.parse(storedLogs);
            logContainer.innerHTML = `<strong>로그:</strong><br>` + logMessages.join('<br>');
            logContainer.scrollTop = logContainer.scrollHeight;
        }
    }

    // 필터 패턴 업데이트
    function updateFilterPatterns() {
        const input = filterInput.value.trim();
        filterPatterns = input ? input.split(',').map(word => {
            word = word.trim();
            if (word.startsWith('/') && word.endsWith('/')) {
                try {
                    return new RegExp(word.slice(1, -1), 'i');
                } catch (e) {
                    log(`⚠️ 유효하지 않은 정규식: ${word}`);
                    return null;
                }
            } else {
                return new RegExp(word, 'i');
            }
        }).filter(regex => regex !== null) : [];
        log(`🛠 필터 패턴 업데이트: [${filterPatterns.map(r => r.toString()).join(', ')}]`);
        saveSettings();
    }

    // 제외 도메인 업데이트
    function updateExcludeDomains() {
        const input = excludeDomainsInput.value.trim();
        excludeDomains = input ? input.split(',').map(domain => domain.trim().toLowerCase()) : [];
        log(`🚫 제외 도메인 업데이트: [${excludeDomains.join(', ')}]`);
        saveSettings();
    }

    // 중복 허용 횟수 업데이트
    function updateDuplicateThreshold() {
        const value = parseInt(duplicateThresholdInput.value);
        duplicateThreshold = isNaN(value) || value < 1 ? 2 : value;
        log(`🔄 중복 허용 횟수 설정: ${duplicateThreshold}`);
        saveSettings();
    }

    // 재시도 횟수 업데이트
    function updateRetryAttempts() {
        const value = parseInt(retryAttemptsInput.value);
        retryAttempts = isNaN(value) || value < 1 ? 3 : value;
        log(`🔄 재시도 횟수 설정: ${retryAttempts}`);
        saveSettings();
    }

    // 재시도 간격 업데이트
    function updateRetryInterval() {
        const value = parseInt(retryIntervalInput.value);
        retryInterval = isNaN(value) || value < 100 ? 500 : value;
        log(`🔄 재시도 간격 설정: ${retryInterval}ms`);
        saveSettings();
    }

    // 크롤링 시작 함수
    async function startCrawling() {
        if (isRunning) {
            alert('이미 크롤링이 진행 중입니다.');
            return;
        }
        getSearchQueryAndEngine();
        if (!searchQuery) {
            alert('현재 페이지에서 검색어를 찾을 수 없습니다.');
            log('⚠️ 검색어 미입력 또는 인식 실패.');
            return;
        }
        isRunning = true;
        isPaused = false;
        currentPage = 1;
        totalPages = 0;
        results = [];
        visitedLinks.clear();
        resultsBody.innerHTML = '';
        visitedCountElem.innerText = '0';
        elapsedTimeElem.innerText = '00:00:00';
        remainingTimeElem.innerText = '00:00:00';
        logMessages = [];
        logContainer.innerHTML = `<strong>로그:</strong><br>`;
        GM_setValue('crawlerLogs', JSON.stringify(logMessages));
        log('✅ 크롤링을 시작합니다.');
        updateDuplicateThreshold();
        updateRetryAttempts();
        updateRetryInterval();
        await crawlPage();
        startTime = Date.now();
        elapsedInterval = setInterval(updateElapsedTime, 1000);
    }

    // 일시정지/재개 함수
    function togglePause() {
        if (!isRunning) {
            alert('일시정지/재개할 크롤링이 없습니다.');
            return;
        }
        isPaused = !isPaused;
        if (isPaused) {
            log('⏸️ 크롤링을 일시정지하였습니다.');
            pauseBtn.innerText = '▶️ 재개';
            pauseBtn.title = '크롤링 재개';
        } else {
            log('▶️ 크롤링을 재개하였습니다.');
            pauseBtn.innerText = '⏸️ 일시정지';
            pauseBtn.title = '크롤링 일시정지';
            crawlPage();
        }
    }

    // 크롤링 중지 함수
    function stopCrawling() {
        if (!isRunning) {
            alert('중지할 크롤링이 없습니다.');
            return;
        }
        isRunning = false;
        isPaused = false;
        pauseBtn.innerText = '⏸️ 일시정지';
        pauseBtn.title = '크롤링 일시정지';
        clearInterval(elapsedInterval);
        updateProgress();
        log('🚫 크롤링을 중지하였습니다.');
        GM_notification({
            text: '크롤링이 중지되었습니다.',
            title: '웹 크롤러 8.0',
            timeout: 3000
        });
    }

    // 크롤링 초기화 함수
    function resetCrawling() {
        stopCrawling();
        currentPage = 1;
        totalPages = 0;
        results = [];
        visitedLinks.clear();
        resultsBody.innerHTML = '';
        visitedCountElem.innerText = '0';
        progressBar.value = 0;
        progressText.innerText = '0%';
        elapsedTimeElem.innerText = '00:00:00';
        remainingTimeElem.innerText = '00:00:00';
        logMessages = [];
        logContainer.innerHTML = `<strong>로그:</strong><br>`;
        GM_setValue('crawlerLogs', JSON.stringify(logMessages));
        crawlData = {
            labels: [],
            datasets: [{
                label: '방문 횟수',
                data: [],
                backgroundColor: 'rgba(75, 192, 192, 0.6)',
                borderColor: 'rgba(75, 192, 192, 1)',
                borderWidth: 1
            },
            {
                label: '평균 페이지 로딩 시간 (ms)',
                data: [],
                backgroundColor: 'rgba(153, 102, 255, 0.6)',
                borderColor: 'rgba(153, 102, 255, 1)',
                borderWidth: 1
            }]
        };
        if (crawlChart) {
            crawlChart.destroy();
        }
        initializeChart();
        log('🔄 크롤링을 초기화하였습니다.');
    }

    // 크롤링 페이지 함수
    async function crawlPage() {
        if (!isRunning || isPaused) {
            return;
        }

        let url = constructURL(currentPage);
        if (!url) {
            log('❌ 지원하지 않는 검색 엔진입니다.');
            alert('지원하지 않는 검색 엔진입니다.');
            isRunning = false;
            return;
        }

        log(`📄 페이지 ${currentPage} 크롤링 중: ${url}`);

        GM_xmlhttpRequest({
            method: "GET",
            url: url,
            headers: {
                "User-Agent": navigator.userAgent,
                "Accept": "text/html"
            },
            onload: function(response) {
                if (response.status !== 200) {
                    log(`❌ 페이지 ${currentPage} 로드 실패: 상태 ${response.status}`);
                    handleCrawlError(currentPage, retryAttempts);
                    return;
                }

                const parser = new DOMParser();
                const doc = parser.parseFromString(response.responseText, 'text/html');
                let items = extractItems(doc);
                if (currentPage === 1) {
                    totalPages = determineTotalPages(doc);
                    totalPagesElem.innerText = totalPages;
                }

                log(`📊 페이지 ${currentPage}에서 ${items.length}개 항목 발견.`);

                items.forEach(item => {
                    processItem(item);
                });

                updateChart();
                updateProgress();
                currentPage++;
                currentPageElem.innerText = currentPage;
                if (currentPage <= totalPages && isRunning && !isPaused) {
                    setTimeout(crawlPage, 100);
                } else {
                    finalizeCrawling();
                }
            },
            onerror: function() {
                log(`❌ 페이지 ${currentPage} 요청 중 오류 발생.`);
                handleCrawlError(currentPage, retryAttempts);
            }
        });
    }

    // 크롤링 완료 시 처리 함수
    function finalizeCrawling() {
        isRunning = false;
        clearInterval(elapsedInterval);
        log('✅ 크롤링이 완료되었습니다.');
        GM_notification({
            text: '크롤링이 완료되었습니다.',
            title: '웹 크롤러 8.0',
            timeout: 3000
        });
    }

    // 크롤링 오류 처리 함수
    function handleCrawlError(page, retriesLeft) {
        if (retriesLeft > 0 && isRunning) {
            log(`🔄 페이지 ${page} 재시도 (${retriesLeft}회 남음).`);
            setTimeout(() => {
                const url = constructURL(page);
                GM_xmlhttpRequest({
                    method: "GET",
                    url: url,
                    headers: {
                        "User-Agent": navigator.userAgent,
                        "Accept": "text/html"
                    },
                    onload: function(response) {
                        if (response.status === 200) {
                            log(`✅ 페이지 ${page} 재시도 성공.`);
                            crawlPage();
                        } else {
                            handleCrawlError(page, retriesLeft - 1);
                        }
                    },
                    onerror: function() {
                        handleCrawlError(page, retriesLeft - 1);
                    }
                });
            }, retryInterval);
        } else {
            log(`❌ 페이지 ${page} 로드 실패: 최대 재시도 횟수 초과.`);
            currentPage++;
            currentPageElem.innerText = currentPage;
            if (currentPage <= totalPages && isRunning && !isPaused) {
                setTimeout(crawlPage, 100);
            } else {
                finalizeCrawling();
            }
        }
    }

    // URL 구성 함수
    function constructURL(page) {
        switch(searchEngine) {
            case 'google':
                return `https://www.google.com/search?q=${encodeURIComponent(searchQuery)}&start=${(page-1)*10}`;
            case 'bing':
                return `https://www.bing.com/search?q=${encodeURIComponent(searchQuery)}&first=${(page-1)*10 +1}`;
            case 'daum':
                return `https://search.daum.net/search?q=${encodeURIComponent(searchQuery)}&page=${page}`;
            case 'naver':
                return `https://search.naver.com/search.naver?query=${encodeURIComponent(searchQuery)}&start=${(page-1)*10 +1}`;
            case 'yahoo':
                return `https://search.yahoo.com/search?p=${encodeURIComponent(searchQuery)}&b=${(page-1)*10 +1}`;
            case 'duckduckgo':
                return `https://duckduckgo.com/html/?q=${encodeURIComponent(searchQuery)}&s=${(page-1)*30}`;
            case 'startpage':
                return `https://www.startpage.com/do/search?query=${encodeURIComponent(searchQuery)}&b=${(page-1)*10 +1}`;
            case 'ecosia':
                return `https://www.ecosia.org/search?q=${encodeURIComponent(searchQuery)}&page=${page}`;
            case 'qwant':
                return `https://www.qwant.com/?q=${encodeURIComponent(searchQuery)}&t=web&s=${page}`;
            case 'ahmia':
                return `http://ahmia.fi/search/?q=${encodeURIComponent(searchQuery)}&page=${page}`;
            case 'torch':
                return `http://torchsearch.de/search/?q=${encodeURIComponent(searchQuery)}&page=${page}`;
            case 'notracker':
                return `http://notracker.org/search/?q=${encodeURIComponent(searchQuery)}&page=${page}`;
            default:
                return '';
        }
    }

    // 항목 추출 함수
    function extractItems(doc) {
        let items = [];
        switch(searchEngine) {
            case 'google':
                items = doc.querySelectorAll('div.g');
                break;
            case 'bing':
                items = doc.querySelectorAll('li.b_algo');
                break;
            case 'daum':
                items = doc.querySelectorAll('div.wrap_cont');
                break;
            case 'naver':
                items = doc.querySelectorAll('div.basic1');
                break;
            case 'yahoo':
                items = doc.querySelectorAll('div.compTitle');
                break;
            case 'duckduckgo':
                items = doc.querySelectorAll('div.result');
                break;
            case 'startpage':
                items = doc.querySelectorAll('div.w-gl__result');
                break;
            case 'ecosia':
                items = doc.querySelectorAll('div.result');
                break;
            case 'qwant':
                items = doc.querySelectorAll('div.results div.result');
                break;
            case 'ahmia':
                items = doc.querySelectorAll('div#main div.result');
                break;
            case 'torch':
                items = doc.querySelectorAll('div.result');
                break;
            case 'notracker':
                items = doc.querySelectorAll('div.result');
                break;
            default:
                break;
        }
        return items;
    }

    // 총 페이지 수 결정 함수
    function determineTotalPages(doc) {
        let pages = 1;
        switch(searchEngine) {
            case 'google':
                const googlePager = doc.querySelectorAll('a[href*="start="]');
                pages = Math.min(googlePager.length, 10) || 1;
                break;
            case 'bing':
                const bingPager = doc.querySelectorAll('a.sb_pagS');
                pages = bingPager.length || 1;
                break;
            case 'daum':
                const daumPager = doc.querySelectorAll('a.pagination__link');
                pages = daumPager.length || 1;
                break;
            case 'naver':
                const naverPager = doc.querySelectorAll('a.nav');
                pages = naverPager.length || 1;
                break;
            case 'yahoo':
                const yahooPager = doc.querySelectorAll('a.fz-l.tco-pagination__anchor');
                pages = yahooPager.length || 1;
                break;
            case 'duckduckgo':
                const ddgPager = doc.querySelectorAll('a.result--more__btn');
                pages = ddgPager.length || 1;
                break;
            case 'startpage':
                const spPager = doc.querySelectorAll('a.paginator__link');
                pages = spPager.length || 1;
                break;
            case 'ecosia':
                const ecosiaPager = doc.querySelectorAll('a.pagination__link');
                pages = ecosiaPager.length || 1;
                break;
            case 'qwant':
                const qwantPager = doc.querySelectorAll('a.pagination__link');
                pages = qwantPager.length || 1;
                break;
            case 'ahmia':
                const ahmiaPager = doc.querySelectorAll('a.pagination__link');
                pages = ahmiaPager.length || 1;
                break;
            case 'torch':
                const torchPager = doc.querySelectorAll('a.pagination__link');
                pages = torchPager.length || 1;
                break;
            case 'notracker':
                const ntPager = doc.querySelectorAll('a.pagination__link');
                pages = ntPager.length || 1;
                break;
            default:
                pages = 1;
                break;
        }
        return pages;
    }

    // 항목 처리 함수
    function processItem(item) {
        let title = 'N/A';
        let link = 'N/A';
        let description = 'N/A';
        let image = 'N/A';
        let htmlLink = 'N/A';
        let whoisInfo = 'N/A';
        let pageLoadTime = 'N/A';

        switch(searchEngine) {
            case 'google':
                const gTitleElem = item.querySelector('h3');
                const gLinkElem = item.querySelector('a');
                const gDescElem = item.querySelector('.IsZvec') || item.querySelector('.VwiC3b');
                if (gTitleElem) title = gTitleElem.innerText;
                if (gLinkElem) link = gLinkElem.href;
                if (gDescElem) description = gDescElem.innerText;

                const gImgElem = item.querySelector('img');
                if (gImgElem && gImgElem.src) {
                    image = `<img src="${gImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'bing':
                const bTitleElem = item.querySelector('h2 a');
                const bDescElem = item.querySelector('p');
                if (bTitleElem) {
                    title = bTitleElem.innerText;
                    link = bTitleElem.href;
                }
                if (bDescElem) description = bDescElem.innerText;

                const bImgElem = item.querySelector('img');
                if (bImgElem && bImgElem.src) {
                    image = `<img src="${bImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'daum':
                const dTitleElem = item.querySelector('a.link_fax');
                const dDescElem = item.querySelector('div.cont_inner');
                if (dTitleElem) {
                    title = dTitleElem.innerText.trim();
                    link = dTitleElem.href;
                }
                if (dDescElem) description = dDescElem.innerText.trim();

                const dImgElem = item.querySelector('img');
                if (dImgElem && dImgElem.src) {
                    image = `<img src="${dImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'naver':
                const nTitleElem = item.querySelector('a.tit');
                const nDescElem = item.querySelector('div.desc');
                if (nTitleElem) {
                    title = nTitleElem.innerText;
                    link = nTitleElem.href;
                }
                if (nDescElem) description = nDescElem.innerText;

                const nImgElem = item.querySelector('img.thumb');
                if (nImgElem && nImgElem.src) {
                    image = `<img src="${nImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'yahoo':
                const yTitleElem = item.querySelector('h3');
                const yLinkElem = item.querySelector('a');
                const yDescElem = item.querySelector('div.compText');
                if (yTitleElem) title = yTitleElem.innerText;
                if (yLinkElem) link = yLinkElem.href;
                if (yDescElem) description = yDescElem.innerText;

                const yImgElem = item.querySelector('img');
                if (yImgElem && yImgElem.src) {
                    image = `<img src="${yImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'duckduckgo':
                const ddgTitleElem = item.querySelector('a.result__a');
                const ddgDescElem = item.querySelector('a.result__snippet');
                if (ddgTitleElem) {
                    title = ddgTitleElem.innerText;
                    link = ddgTitleElem.href;
                }
                if (ddgDescElem) description = ddgDescElem.innerText;

                const ddgImgElem = item.querySelector('img.result__image');
                if (ddgImgElem && ddgImgElem.src) {
                    image = `<img src="${ddgImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'startpage':
                const spTitleElem = item.querySelector('a.w-gl__result-title');
                const spDescElem = item.querySelector('p.w-gl__result-description');
                if (spTitleElem) {
                    title = spTitleElem.innerText;
                    link = spTitleElem.href;
                }
                if (spDescElem) description = spDescElem.innerText;

                const spImgElem = item.querySelector('img.w-gl__result-image');
                if (spImgElem && spImgElem.src) {
                    image = `<img src="${spImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'ecosia':
                const ecosiaTitleElem = item.querySelector('h2.result-title a');
                const ecosiaDescElem = item.querySelector('p.result-description');
                if (ecosiaTitleElem) {
                    title = ecosiaTitleElem.innerText;
                    link = ecosiaTitleElem.href;
                }
                if (ecosiaDescElem) description = ecosiaDescElem.innerText;

                const ecosiaImgElem = item.querySelector('img.result-image');
                if (ecosiaImgElem && ecosiaImgElem.src) {
                    image = `<img src="${ecosiaImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'qwant':
                const qwantTitleElem = item.querySelector('a.result__title');
                const qwantDescElem = item.querySelector('p.result__description');
                if (qwantTitleElem) {
                    title = qwantTitleElem.innerText;
                    link = qwantTitleElem.href;
                }
                if (qwantDescElem) description = qwantDescElem.innerText;

                const qwantImgElem = item.querySelector('img.result__image');
                if (qwantImgElem && qwantImgElem.src) {
                    image = `<img src="${qwantImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'ahmia':
                const ahmiaTitleElem = item.querySelector('h2.result-title a');
                const ahmiaDescElem = item.querySelector('p.result-description');
                if (ahmiaTitleElem) {
                    title = ahmiaTitleElem.innerText;
                    link = ahmiaTitleElem.href;
                }
                if (ahmiaDescElem) description = ahmiaDescElem.innerText;

                const ahmiaImgElem = item.querySelector('img.result-image');
                if (ahmiaImgElem && ahmiaImgElem.src) {
                    image = `<img src="${ahmiaImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    whoisInfo = `<a href="https://jsonwhois.com/whois/${encodeURIComponent(extractDomain(link))}" target="_blank">보기</a>`;
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'torch':
                const torchTitleElem = item.querySelector('h3.result-title a');
                const torchDescElem = item.querySelector('p.result-description');
                if (torchTitleElem) {
                    title = torchTitleElem.innerText;
                    link = torchTitleElem.href;
                }
                if (torchDescElem) description = torchDescElem.innerText;

                const torchImgElem = item.querySelector('img.result-image');
                if (torchImgElem && torchImgElem.src) {
                    image = `<img src="${torchImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    whoisInfo = `<a href="https://jsonwhois.com/whois/${encodeURIComponent(extractDomain(link))}" target="_blank">보기</a>`;
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'notracker':
                const ntTitleElem = item.querySelector('h3.result-title a');
                const ntDescElem = item.querySelector('p.result-description');
                if (ntTitleElem) {
                    title = ntTitleElem.innerText;
                    link = ntTitleElem.href;
                }
                if (ntDescElem) description = ntDescElem.innerText;

                const ntImgElem = item.querySelector('img.result-image');
                if (ntImgElem && ntImgElem.src) {
                    image = `<img src="${ntImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    whoisInfo = `<a href="https://jsonwhois.com/whois/${encodeURIComponent(extractDomain(link))}" target="_blank">보기</a>`;
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            default:
                break;
        }

        // 광고 제외 필터링
        if (toggleAds.checked) {
            const combinedText = `${title} ${description}`.toLowerCase();
            const isAd = combinedText.includes('advertisement') || combinedText.includes('광고') || combinedText.includes('ad ');
            if (isAd) {
                log(`🚫 광고 항목 제외: "${title}"`);
                return;
            }
        }

        // 필터 패턴 적용
        if (filterPatterns.length > 0) {
            const combinedText = `${title} ${description}`.toLowerCase();
            const isFiltered = filterPatterns.some(regex => regex.test(combinedText));
            if (isFiltered) {
                log(`❌ 필터 단어 포함 항목 제외: "${title}"`);
                return;
            }
        }

        // 도메인 추출 및 제외 도메인 적용
        const domain = extractDomain(link);
        if (!domain) return;

        if (excludeDomains.includes(domain.toLowerCase())) {
            log(`🚫 제외 도메인 항목 제외: "${link}"`);
            return;
        }

        // 중복 방문 제한
        let visitCount = visitedLinks.get(domain) || 0;
        if (visitCount >= duplicateThreshold) {
            log(`🔄 중복 방문 제한: "${domain}"`);
            return;
        }

        visitedLinks.set(domain, visitCount + 1);
        visitedCountElem.innerText = visitedLinks.size.toString();

        // 페이지 로딩 시간 측정
        const startLoad = performance.now();
        fetch(link, { mode: 'no-cors' })
            .then(response => {
                const endLoad = performance.now();
                pageLoadTime = Math.round(endLoad - startLoad);
                updateRow();
            })
            .catch(err => {
                pageLoadTime = '계산 불가';
                updateRow();
            });

        // WHOIS 정보 링크 생성
        if (toggleHTML.checked && link !== 'N/A') {
            whoisInfo = `<a href="https://jsonwhois.com/whois/${encodeURIComponent(domain)}" target="_blank">보기</a>`;
        }

        // 이미지 옵션 적용
        if (!toggleImages.checked) {
            image = '비활성화';
        }

        // 결과 배열에 추가
        results.push({ title, link, description, image, htmlLink, whoisInfo, pageLoadTime });

        // 결과 테이블에 행 추가
        const row = document.createElement('tr');
        row.innerHTML = `
            <td>${escapeHTML(title)}</td>
            <td><a href="${escapeHTML(link)}" target="_blank">${escapeHTML(link)}</a></td>
            <td>${escapeHTML(description)}</td>
            <td>${image}</td>
            <td>${htmlLink}</td>
            <td>${whoisInfo}</td>
            <td>${pageLoadTime}</td>
        `;
        resultsBody.appendChild(row);

        function updateRow() {
            // 업데이트된 로딩 시간을 테이블에 반영
            row.cells[6].innerText = pageLoadTime;
            updateChart();
            updateProgress();
        }
    }

    // HTML 이스케프 함수
    function escapeHTML(str) {
        if (!str) return '';
        return str.replace(/&/g, "&amp;")
                  .replace(/</g, "&lt;")
                  .replace(/>/g, "&gt;")
                  .replace(/"/g, "&quot;")
                  .replace(/'/g, "&#039;");
    }

    // 도메인 추출 함수
    function extractDomain(url) {
        try {
            const urlObj = new URL(url);
            return urlObj.hostname.replace('www.', '');
        } catch (e) {
            return null;
        }
    }

    // 경과 시간 업데이트 함수
    function updateElapsedTime() {
        if (!startTime) return;
        const now = Date.now();
        const elapsed = Math.floor((now - startTime) / 1000);
        elapsedTimeElem.innerText = formatTime(elapsed);
        const estimatedTotal = totalPages * ((elapsed > 0) ? (elapsed / (currentPage - 1)) : 0.5);
        const remaining = Math.max(Math.round(estimatedTotal - elapsed), 0);
        remainingTimeElem.innerText = formatTime(remaining);
    }

    // 시간 형식화 함수
    function formatTime(seconds) {
        const hrs = String(Math.floor(seconds / 3600)).padStart(2, '0');
        const mins = String(Math.floor((seconds % 3600) / 60)).padStart(2, '0');
        const secs = String(seconds % 60).padStart(2, '0');
        return `${hrs}:${mins}:${secs}`;
    }

    // 차트 업데이트 함수
    function updateChart() {
        crawlData.labels = Array.from(visitedLinks.keys());
        crawlData.datasets[0].data = Array.from(visitedLinks.values());

        // 평균 페이지 로딩 시간 계산
        let loadTimes = results.filter(r => typeof r.pageLoadTime === 'number').map(r => r.pageLoadTime);
        let averageLoadTime = loadTimes.length > 0 ? Math.round(loadTimes.reduce((a, b) => a + b, 0) / loadTimes.length) : 0;
        crawlData.datasets[1].data = Array.from(visitedLinks.keys()).map(domain => {
            const times = results.filter(r => extractDomain(r.link) === domain && typeof r.pageLoadTime === 'number').map(r => r.pageLoadTime);
            return times.length > 0 ? Math.round(times.reduce((a, b) => a + b, 0) / times.length) : 0;
        });

        if (crawlChart) {
            crawlChart.update();
        }
        GM_setValue('crawlerData', JSON.stringify(crawlData));
    }

    // 크롤 데이터 로드 함수
    function loadCrawlData() {
        const storedData = GM_getValue('crawlerData', null);
        if (storedData) {
            const parsedData = JSON.parse(storedData);
            crawlData = parsedData;
            if (crawlChart) {
                crawlChart.data = crawlData;
                crawlChart.update();
            }
        }
    }

    // 크롤 데이터 저장 함수
    function saveCrawlData() {
        GM_setValue('crawlerData', JSON.stringify(crawlData));
    }

    // 주기적으로 크롤 데이터 저장
    setInterval(saveCrawlData, 5000);

    // 검색어 및 검색 엔진 감지 함수
    function getSearchQueryAndEngine() {
        const url = window.location.href;
        if (url.includes('google.com/search')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'google';
        } else if (url.includes('bing.com/search')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'bing';
        } else if (url.includes('daum.net/search')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'daum';
        } else if (url.includes('search.naver.com/search')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('query') || '';
            searchEngine = 'naver';
        } else if (url.includes('search.yahoo.com/search')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('p') || '';
            searchEngine = 'yahoo';
        } else if (url.includes('duckduckgo.com/')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'duckduckgo';
        } else if (url.includes('startpage.com/do/search')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('query') || '';
            searchEngine = 'startpage';
        } else if (url.includes('ecosia.org/search')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'ecosia';
        } else if (url.includes('qwant.com/')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'qwant';
        } else if (url.includes('ahmia.fi/')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'ahmia';
        } else if (url.includes('torchsearch.de/')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'torch';
        } else if (url.includes('notracker.org/')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'notracker';
        } else {
            searchQuery = '';
            searchEngine = '';
        }
        log(`🔍 검색 엔진: ${capitalizeFirstLetter(searchEngine)}, 검색어: "${searchQuery}"`);
    }

    // 로그 기록 함수
    function log(message) {
        const time = new Date().toLocaleTimeString();
        const entry = `[${time}] ${message}`;
        logMessages.push(entry);
        logContainer.innerHTML += `${entry}<br>`;
        logContainer.scrollTop = logContainer.scrollHeight;
        GM_setValue('crawlerLogs', JSON.stringify(logMessages));
    }

    // 결과 내보내기 함수 (중복 제거 및 정렬 추가)
    function exportResults() {
        if (results.length === 0) {
            alert('내보낼 결과가 없습니다.');
            return;
        }
        const format = prompt('내보낼 형식을 선택하세요 (xlsx, csv, json):', 'xlsx');
        if (!format) return;
        if (format.toLowerCase() === 'xlsx') {
            const ws = XLSX.utils.json_to_sheet(results);
            const wb = XLSX.utils.book_new();
            XLSX.utils.book_append_sheet(wb, ws, "결과");
            XLSX.writeFile(wb, "크롤링_결과.xlsx");
            log('💾 결과를 "크롤링_결과.xlsx" 파일로 내보냈습니다.');
            GM_notification({
                text: '결과를 "크롤링_결과.xlsx" 파일로 내보냈습니다.',
                title: '웹 크롤러 8.0',
                timeout: 3000
            });
        } else if (format.toLowerCase() === 'csv') {
            const csv = results.map(row => `"${row.title.replace(/"/g, '""')}","${row.link.replace(/"/g, '""')}","${row.description.replace(/"/g, '""')}","${row.image.replace(/"/g, '""')}","${row.htmlLink}","${row.whoisInfo}","${row.pageLoadTime}"`).join('\n');
            const blob = new Blob([csv], { type: 'text/csv;charset=utf-8;' });
            const url = URL.createObjectURL(blob);
            const a = document.createElement('a');
            a.href = url;
            a.download = '크롤링_결과.csv';
            a.click();
            log('💾 결과를 "크롤링_결과.csv" 파일로 내보냈습니다.');
            GM_notification({
                text: '결과를 "크롤링_결과.csv" 파일로 내보냈습니다.',
                title: '웹 크롤러 8.0',
                timeout: 3000
            });
        } else if (format.toLowerCase() === 'json') {
            const json = JSON.stringify(results, null, 2);
            const blob = new Blob([json], { type: 'application/json;charset=utf-8;' });
            const url = URL.createObjectURL(blob);
            const a = document.createElement('a');
            a.href = url;
            a.download = '크롤링_결과.json';
            a.click();
            log('💾 결과를 "크롤링_결과.json" 파일로 내보냈습니다.');
            GM_notification({
                text: '결과를 "크롤링_결과.json" 파일로 내보냈습니다.',
                title: '웹 크롤러 8.0',
                timeout: 3000
            });
        } else {
            alert('지원하지 않는 형식입니다.');
        }
    }

    // 결과 테이블 정렬 함수
    function sortTable(n) {
        const table = document.getElementById("resultsTable");
        let switching = true;
        let dir = "asc";
        let switchcount = 0;
        while (switching) {
            switching = false;
            const rows = table.rows;
            for (let i = 1; i < (rows.length - 1); i++) {
                let shouldSwitch = false;
                const x = rows[i].getElementsByTagName("TD")[n];
                const y = rows[i + 1].getElementsByTagName("TD")[n];
                let xContent = x.textContent || x.innerText;
                let yContent = y.textContent || y.innerText;

                // 숫자 비교
                if (n === 6) {
                    xContent = parseInt(xContent);
                    yContent = parseInt(yContent);
                }

                if (dir === "asc") {
                    if (xContent > yContent) {
                        shouldSwitch = true;
                        break;
                    }
                } else if (dir === "desc") {
                    if (xContent < yContent) {
                        shouldSwitch = true;
                        break;
                    }
                }
            }
            if (shouldSwitch) {
                rows[i].parentNode.insertBefore(rows[i + 1], rows[i]);
                switching = true;
                switchcount++;
            } else {
                if (switchcount === 0 && dir === "asc") {
                    dir = "desc";
                    switching = true;
                }
            }
        }
    }

    // 사용자 경험 향상을 위한 함수 추가
    function capitalizeFirstLetter(string) {
        if (!string) return '';
        return string.charAt(0).toUpperCase() + string.slice(1);
    }

    // 항목 검색 기능
    function filterResults() {
        const filter = searchResultsInput.value.toLowerCase();
        const rows = resultsBody.getElementsByTagName('tr');
        for (let i = 0; i < rows.length; i++) {
            const cells = rows[i].getElementsByTagName('td');
            let match = false;
            for (let j = 0; j < cells.length - 3; j++) { // 이미지, HTML 링크, WHOIS 제외
                if (cells[j].innerText.toLowerCase().includes(filter)) {
                    match = true;
                    break;
                }
            }
            rows[i].style.display = match ? '' : 'none';
        }
    }

    // 로그 초기화 함수
    function clearLogs() {
        if(confirm('로그를 초기화하시겠습니까?')) {
            logMessages = [];
            logContainer.innerHTML = `<strong>로그:</strong><br>`;
            GM_setValue('crawlerLogs', JSON.stringify(logMessages));
            log('🧹 로그를 초기화하였습니다.');
        }
    }

    // 크롤링 시작 함수
    async function startCrawling() {
        if (isRunning) {
            alert('이미 크롤링이 진행 중입니다.');
            return;
        }
        getSearchQueryAndEngine();
        if (!searchQuery) {
            alert('현재 페이지에서 검색어를 찾을 수 없습니다.');
            log('⚠️ 검색어 미입력 또는 인식 실패.');
            return;
        }
        isRunning = true;
        isPaused = false;
        currentPage = 1;
        totalPages = 0;
        results = [];
        visitedLinks.clear();
        resultsBody.innerHTML = '';
        visitedCountElem.innerText = '0';
        elapsedTimeElem.innerText = '00:00:00';
        remainingTimeElem.innerText = '00:00:00';
        logMessages = [];
        logContainer.innerHTML = `<strong>로그:</strong><br>`;
        GM_setValue('crawlerLogs', JSON.stringify(logMessages));
        log('✅ 크롤링을 시작합니다.');
        updateDuplicateThreshold();
        updateRetryAttempts();
        updateRetryInterval();
        await crawlPage();
        startTime = Date.now();
        elapsedInterval = setInterval(updateElapsedTime, 1000);
    }

    // 일시정지/재개 함수
    function togglePause() {
        if (!isRunning) {
            alert('일시정지/재개할 크롤링이 없습니다.');
            return;
        }
        isPaused = !isPaused;
        if (isPaused) {
            log('⏸️ 크롤링을 일시정지하였습니다.');
            pauseBtn.innerText = '▶️ 재개';
            pauseBtn.title = '크롤링 재개';
        } else {
            log('▶️ 크롤링을 재개하였습니다.');
            pauseBtn.innerText = '⏸️ 일시정지';
            pauseBtn.title = '크롤링 일시정지';
            crawlPage();
        }
    }

    // 크롤링 중지 함수
    function stopCrawling() {
        if (!isRunning) {
            alert('중지할 크롤링이 없습니다.');
            return;
        }
        isRunning = false;
        isPaused = false;
        pauseBtn.innerText = '⏸️ 일시정지';
        pauseBtn.title = '크롤링 일시정지';
        clearInterval(elapsedInterval);
        updateProgress();
        log('🚫 크롤링을 중지하였습니다.');
        GM_notification({
            text: '크롤링이 중지되었습니다.',
            title: '웹 크롤러 8.0',
            timeout: 3000
        });
    }

    // 크롤링 초기화 함수
    function resetCrawling() {
        stopCrawling();
        currentPage = 1;
        totalPages = 0;
        results = [];
        visitedLinks.clear();
        resultsBody.innerHTML = '';
        visitedCountElem.innerText = '0';
        progressBar.value = 0;
        progressText.innerText = '0%';
        elapsedTimeElem.innerText = '00:00:00';
        remainingTimeElem.innerText = '00:00:00';
        logMessages = [];
        logContainer.innerHTML = `<strong>로그:</strong><br>`;
        GM_setValue('crawlerLogs', JSON.stringify(logMessages));
        crawlData = {
            labels: [],
            datasets: [{
                label: '방문 횟수',
                data: [],
                backgroundColor: 'rgba(75, 192, 192, 0.6)',
                borderColor: 'rgba(75, 192, 192, 1)',
                borderWidth: 1
            },
            {
                label: '평균 페이지 로딩 시간 (ms)',
                data: [],
                backgroundColor: 'rgba(153, 102, 255, 0.6)',
                borderColor: 'rgba(153, 102, 255, 1)',
                borderWidth: 1
            }]
        };
        if (crawlChart) {
            crawlChart.destroy();
        }
        initializeChart();
        log('🔄 크롤링을 초기화하였습니다.');
    }

    // 크롤링 페이지 함수
    async function crawlPage() {
        if (!isRunning || isPaused) {
            return;
        }

        let url = constructURL(currentPage);
        if (!url) {
            log('❌ 지원하지 않는 검색 엔진입니다.');
            alert('지원하지 않는 검색 엔진입니다.');
            isRunning = false;
            return;
        }

        log(`📄 페이지 ${currentPage} 크롤링 중: ${url}`);

        GM_xmlhttpRequest({
            method: "GET",
            url: url,
            headers: {
                "User-Agent": navigator.userAgent,
                "Accept": "text/html"
            },
            onload: function(response) {
                if (response.status !== 200) {
                    log(`❌ 페이지 ${currentPage} 로드 실패: 상태 ${response.status}`);
                    handleCrawlError(currentPage, retryAttempts);
                    return;
                }

                const parser = new DOMParser();
                const doc = parser.parseFromString(response.responseText, 'text/html');
                let items = extractItems(doc);
                if (currentPage === 1) {
                    totalPages = determineTotalPages(doc);
                    totalPagesElem.innerText = totalPages;
                }

                log(`📊 페이지 ${currentPage}에서 ${items.length}개 항목 발견.`);

                items.forEach(item => {
                    processItem(item);
                });

                updateChart();
                updateProgress();
                currentPage++;
                currentPageElem.innerText = currentPage;
                if (currentPage <= totalPages && isRunning && !isPaused) {
                    setTimeout(crawlPage, 100);
                } else {
                    finalizeCrawling();
                }
            },
            onerror: function() {
                log(`❌ 페이지 ${currentPage} 요청 중 오류 발생.`);
                handleCrawlError(currentPage, retryAttempts);
            }
        });
    }

    // 크롤링 완료 시 처리 함수
    function finalizeCrawling() {
        isRunning = false;
        clearInterval(elapsedInterval);
        log('✅ 크롤링이 완료되었습니다.');
        GM_notification({
            text: '크롤링이 완료되었습니다.',
            title: '웹 크롤러 8.0',
            timeout: 3000
        });
    }

    // 크롤링 오류 처리 함수
    function handleCrawlError(page, retriesLeft) {
        if (retriesLeft > 0 && isRunning) {
            log(`🔄 페이지 ${page} 재시도 (${retriesLeft}회 남음).`);
            setTimeout(() => {
                const url = constructURL(page);
                GM_xmlhttpRequest({
                    method: "GET",
                    url: url,
                    headers: {
                        "User-Agent": navigator.userAgent,
                        "Accept": "text/html"
                    },
                    onload: function(response) {
                        if (response.status === 200) {
                            log(`✅ 페이지 ${page} 재시도 성공.`);
                            crawlPage();
                        } else {
                            handleCrawlError(page, retriesLeft - 1);
                        }
                    },
                    onerror: function() {
                        handleCrawlError(page, retriesLeft - 1);
                    }
                });
            }, retryInterval);
        } else {
            log(`❌ 페이지 ${page} 로드 실패: 최대 재시도 횟수 초과.`);
            currentPage++;
            currentPageElem.innerText = currentPage;
            if (currentPage <= totalPages && isRunning && !isPaused) {
                setTimeout(crawlPage, 100);
            } else {
                finalizeCrawling();
            }
        }
    }

    // URL 구성 함수
    function constructURL(page) {
        switch(searchEngine) {
            case 'google':
                return `https://www.google.com/search?q=${encodeURIComponent(searchQuery)}&start=${(page-1)*10}`;
            case 'bing':
                return `https://www.bing.com/search?q=${encodeURIComponent(searchQuery)}&first=${(page-1)*10 +1}`;
            case 'daum':
                return `https://search.daum.net/search?q=${encodeURIComponent(searchQuery)}&page=${page}`;
            case 'naver':
                return `https://search.naver.com/search.naver?query=${encodeURIComponent(searchQuery)}&start=${(page-1)*10 +1}`;
            case 'yahoo':
                return `https://search.yahoo.com/search?p=${encodeURIComponent(searchQuery)}&b=${(page-1)*10 +1}`;
            case 'duckduckgo':
                return `https://duckduckgo.com/html/?q=${encodeURIComponent(searchQuery)}&s=${(page-1)*30}`;
            case 'startpage':
                return `https://www.startpage.com/do/search?query=${encodeURIComponent(searchQuery)}&b=${(page-1)*10 +1}`;
            case 'ecosia':
                return `https://www.ecosia.org/search?q=${encodeURIComponent(searchQuery)}&page=${page}`;
            case 'qwant':
                return `https://www.qwant.com/?q=${encodeURIComponent(searchQuery)}&t=web&s=${page}`;
            case 'ahmia':
                return `http://ahmia.fi/search/?q=${encodeURIComponent(searchQuery)}&page=${page}`;
            case 'torch':
                return `http://torchsearch.de/search/?q=${encodeURIComponent(searchQuery)}&page=${page}`;
            case 'notracker':
                return `http://notracker.org/search/?q=${encodeURIComponent(searchQuery)}&page=${page}`;
            default:
                return '';
        }
    }

    // 항목 추출 함수
    function extractItems(doc) {
        let items = [];
        switch(searchEngine) {
            case 'google':
                items = doc.querySelectorAll('div.g');
                break;
            case 'bing':
                items = doc.querySelectorAll('li.b_algo');
                break;
            case 'daum':
                items = doc.querySelectorAll('div.wrap_cont');
                break;
            case 'naver':
                items = doc.querySelectorAll('div.basic1');
                break;
            case 'yahoo':
                items = doc.querySelectorAll('div.compTitle');
                break;
            case 'duckduckgo':
                items = doc.querySelectorAll('div.result');
                break;
            case 'startpage':
                items = doc.querySelectorAll('div.w-gl__result');
                break;
            case 'ecosia':
                items = doc.querySelectorAll('div.result');
                break;
            case 'qwant':
                items = doc.querySelectorAll('div.results div.result');
                break;
            case 'ahmia':
                items = doc.querySelectorAll('div#main div.result');
                break;
            case 'torch':
                items = doc.querySelectorAll('div.result');
                break;
            case 'notracker':
                items = doc.querySelectorAll('div.result');
                break;
            default:
                break;
        }
        return items;
    }

    // 총 페이지 수 결정 함수
    function determineTotalPages(doc) {
        let pages = 1;
        switch(searchEngine) {
            case 'google':
                const googlePager = doc.querySelectorAll('a[href*="start="]');
                pages = Math.min(googlePager.length, 10) || 1;
                break;
            case 'bing':
                const bingPager = doc.querySelectorAll('a.sb_pagS');
                pages = bingPager.length || 1;
                break;
            case 'daum':
                const daumPager = doc.querySelectorAll('a.pagination__link');
                pages = daumPager.length || 1;
                break;
            case 'naver':
                const naverPager = doc.querySelectorAll('a.nav');
                pages = naverPager.length || 1;
                break;
            case 'yahoo':
                const yahooPager = doc.querySelectorAll('a.fz-l.tco-pagination__anchor');
                pages = yahooPager.length || 1;
                break;
            case 'duckduckgo':
                const ddgPager = doc.querySelectorAll('a.result--more__btn');
                pages = ddgPager.length || 1;
                break;
            case 'startpage':
                const spPager = doc.querySelectorAll('a.paginator__link');
                pages = spPager.length || 1;
                break;
            case 'ecosia':
                const ecosiaPager = doc.querySelectorAll('a.pagination__link');
                pages = ecosiaPager.length || 1;
                break;
            case 'qwant':
                const qwantPager = doc.querySelectorAll('a.pagination__link');
                pages = qwantPager.length || 1;
                break;
            case 'ahmia':
                const ahmiaPager = doc.querySelectorAll('a.pagination__link');
                pages = ahmiaPager.length || 1;
                break;
            case 'torch':
                const torchPager = doc.querySelectorAll('a.pagination__link');
                pages = torchPager.length || 1;
                break;
            case 'notracker':
                const ntPager = doc.querySelectorAll('a.pagination__link');
                pages = ntPager.length || 1;
                break;
            default:
                pages = 1;
                break;
        }
        return pages;
    }

    // 항목 처리 함수
    function processItem(item) {
        let title = 'N/A';
        let link = 'N/A';
        let description = 'N/A';
        let image = 'N/A';
        let htmlLink = 'N/A';
        let whoisInfo = 'N/A';
        let pageLoadTime = 'N/A';

        switch(searchEngine) {
            case 'google':
                const gTitleElem = item.querySelector('h3');
                const gLinkElem = item.querySelector('a');
                const gDescElem = item.querySelector('.IsZvec') || item.querySelector('.VwiC3b');
                if (gTitleElem) title = gTitleElem.innerText;
                if (gLinkElem) link = gLinkElem.href;
                if (gDescElem) description = gDescElem.innerText;

                const gImgElem = item.querySelector('img');
                if (gImgElem && gImgElem.src) {
                    image = `<img src="${gImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'bing':
                const bTitleElem = item.querySelector('h2 a');
                const bDescElem = item.querySelector('p');
                if (bTitleElem) {
                    title = bTitleElem.innerText;
                    link = bTitleElem.href;
                }
                if (bDescElem) description = bDescElem.innerText;

                const bImgElem = item.querySelector('img');
                if (bImgElem && bImgElem.src) {
                    image = `<img src="${bImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'daum':
                const dTitleElem = item.querySelector('a.link_fax');
                const dDescElem = item.querySelector('div.cont_inner');
                if (dTitleElem) {
                    title = dTitleElem.innerText.trim();
                    link = dTitleElem.href;
                }
                if (dDescElem) description = dDescElem.innerText.trim();

                const dImgElem = item.querySelector('img');
                if (dImgElem && dImgElem.src) {
                    image = `<img src="${dImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'naver':
                const nTitleElem = item.querySelector('a.tit');
                const nDescElem = item.querySelector('div.desc');
                if (nTitleElem) {
                    title = nTitleElem.innerText;
                    link = nTitleElem.href;
                }
                if (nDescElem) description = nDescElem.innerText;

                const nImgElem = item.querySelector('img.thumb');
                if (nImgElem && nImgElem.src) {
                    image = `<img src="${nImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'yahoo':
                const yTitleElem = item.querySelector('h3');
                const yLinkElem = item.querySelector('a');
                const yDescElem = item.querySelector('div.compText');
                if (yTitleElem) title = yTitleElem.innerText;
                if (yLinkElem) link = yLinkElem.href;
                if (yDescElem) description = yDescElem.innerText;

                const yImgElem = item.querySelector('img');
                if (yImgElem && yImgElem.src) {
                    image = `<img src="${yImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'duckduckgo':
                const ddgTitleElem = item.querySelector('a.result__a');
                const ddgDescElem = item.querySelector('a.result__snippet');
                if (ddgTitleElem) {
                    title = ddgTitleElem.innerText;
                    link = ddgTitleElem.href;
                }
                if (ddgDescElem) description = ddgDescElem.innerText;

                const ddgImgElem = item.querySelector('img.result__image');
                if (ddgImgElem && ddgImgElem.src) {
                    image = `<img src="${ddgImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'startpage':
                const spTitleElem = item.querySelector('a.w-gl__result-title');
                const spDescElem = item.querySelector('p.w-gl__result-description');
                if (spTitleElem) {
                    title = spTitleElem.innerText;
                    link = spTitleElem.href;
                }
                if (spDescElem) description = spDescElem.innerText;

                const spImgElem = item.querySelector('img.w-gl__result-image');
                if (spImgElem && spImgElem.src) {
                    image = `<img src="${spImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'ecosia':
                const ecosiaTitleElem = item.querySelector('h2.result-title a');
                const ecosiaDescElem = item.querySelector('p.result-description');
                if (ecosiaTitleElem) {
                    title = ecosiaTitleElem.innerText;
                    link = ecosiaTitleElem.href;
                }
                if (ecosiaDescElem) description = ecosiaDescElem.innerText;

                const ecosiaImgElem = item.querySelector('img.result-image');
                if (ecosiaImgElem && ecosiaImgElem.src) {
                    image = `<img src="${ecosiaImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'qwant':
                const qwantTitleElem = item.querySelector('a.result__title');
                const qwantDescElem = item.querySelector('p.result__description');
                if (qwantTitleElem) {
                    title = qwantTitleElem.innerText;
                    link = qwantTitleElem.href;
                }
                if (qwantDescElem) description = qwantDescElem.innerText;

                const qwantImgElem = item.querySelector('img.result__image');
                if (qwantImgElem && qwantImgElem.src) {
                    image = `<img src="${qwantImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'ahmia':
                const ahmiaTitleElem = item.querySelector('h2.result-title a');
                const ahmiaDescElem = item.querySelector('p.result-description');
                if (ahmiaTitleElem) {
                    title = ahmiaTitleElem.innerText;
                    link = ahmiaTitleElem.href;
                }
                if (ahmiaDescElem) description = ahmiaDescElem.innerText;

                const ahmiaImgElem = item.querySelector('img.result-image');
                if (ahmiaImgElem && ahmiaImgElem.src) {
                    image = `<img src="${ahmiaImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    whoisInfo = `<a href="https://jsonwhois.com/whois/${encodeURIComponent(extractDomain(link))}" target="_blank">보기</a>`;
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'torch':
                const torchTitleElem = item.querySelector('h3.result-title a');
                const torchDescElem = item.querySelector('p.result-description');
                if (torchTitleElem) {
                    title = torchTitleElem.innerText;
                    link = torchTitleElem.href;
                }
                if (torchDescElem) description = torchDescElem.innerText;

                const torchImgElem = item.querySelector('img.result-image');
                if (torchImgElem && torchImgElem.src) {
                    image = `<img src="${torchImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    whoisInfo = `<a href="https://jsonwhois.com/whois/${encodeURIComponent(extractDomain(link))}" target="_blank">보기</a>`;
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            case 'notracker':
                const ntTitleElem = item.querySelector('h3.result-title a');
                const ntDescElem = item.querySelector('p.result-description');
                if (ntTitleElem) {
                    title = ntTitleElem.innerText;
                    link = ntTitleElem.href;
                }
                if (ntDescElem) description = ntDescElem.innerText;

                const ntImgElem = item.querySelector('img.result-image');
                if (ntImgElem && ntImgElem.src) {
                    image = `<img src="${ntImgElem.src}" alt="이미지" style="max-width: 100px; max-height: 100px;">`;
                }

                if (toggleHTML.checked && link !== 'N/A') {
                    whoisInfo = `<a href="https://jsonwhois.com/whois/${encodeURIComponent(extractDomain(link))}" target="_blank">보기</a>`;
                    htmlLink = `<a href="https://codebeautify.org/htmlviewer/?url=${encodeURIComponent(link)}" target="_blank">보기</a>`;
                }
                break;
            default:
                break;
        }

        // 광고 제외 필터링
        if (toggleAds.checked) {
            const combinedText = `${title} ${description}`.toLowerCase();
            const isAd = combinedText.includes('advertisement') || combinedText.includes('광고') || combinedText.includes('ad ');
            if (isAd) {
                log(`🚫 광고 항목 제외: "${title}"`);
                return;
            }
        }

        // 필터 패턴 적용
        if (filterPatterns.length > 0) {
            const combinedText = `${title} ${description}`.toLowerCase();
            const isFiltered = filterPatterns.some(regex => regex.test(combinedText));
            if (isFiltered) {
                log(`❌ 필터 단어 포함 항목 제외: "${title}"`);
                return;
            }
        }

        // 도메인 추출 및 제외 도메인 적용
        const domain = extractDomain(link);
        if (!domain) return;

        if (excludeDomains.includes(domain.toLowerCase())) {
            log(`🚫 제외 도메인 항목 제외: "${link}"`);
            return;
        }

        // 중복 방문 제한
        let visitCount = visitedLinks.get(domain) || 0;
        if (visitCount >= duplicateThreshold) {
            log(`🔄 중복 방문 제한: "${domain}"`);
            return;
        }

        visitedLinks.set(domain, visitCount + 1);
        visitedCountElem.innerText = visitedLinks.size.toString();

        // 페이지 로딩 시간 측정
        const startLoad = performance.now();
        fetch(link, { mode: 'no-cors' })
            .then(response => {
                const endLoad = performance.now();
                pageLoadTime = Math.round(endLoad - startLoad);
                updateRow();
            })
            .catch(err => {
                pageLoadTime = '계산 불가';
                updateRow();
            });

        // WHOIS 정보 링크 생성
        if (toggleHTML.checked && link !== 'N/A') {
            whoisInfo = `<a href="https://jsonwhois.com/whois/${encodeURIComponent(domain)}" target="_blank">보기</a>`;
        }

        // 이미지 옵션 적용
        if (!toggleImages.checked) {
            image = '비활성화';
        }

        // 결과 배열에 추가
        results.push({ title, link, description, image, htmlLink, whoisInfo, pageLoadTime });

        // 결과 테이블에 행 추가
        const row = document.createElement('tr');
        row.innerHTML = `
            <td>${escapeHTML(title)}</td>
            <td><a href="${escapeHTML(link)}" target="_blank">${escapeHTML(link)}</a></td>
            <td>${escapeHTML(description)}</td>
            <td>${image}</td>
            <td>${htmlLink}</td>
            <td>${whoisInfo}</td>
            <td>${pageLoadTime}</td>
        `;
        resultsBody.appendChild(row);

        function updateRow() {
            // 업데이트된 로딩 시간을 테이블에 반영
            row.cells[6].innerText = pageLoadTime;
            updateChart();
            updateProgress();
        }
    }

    // HTML 이스케프 함수
    function escapeHTML(str) {
        if (!str) return '';
        return str.replace(/&/g, "&amp;")
                  .replace(/</g, "&lt;")
                  .replace(/>/g, "&gt;")
                  .replace(/"/g, "&quot;")
                  .replace(/'/g, "&#039;");
    }

    // 도메인 추출 함수
    function extractDomain(url) {
        try {
            const urlObj = new URL(url);
            return urlObj.hostname.replace('www.', '');
        } catch (e) {
            return null;
        }
    }

    // 경과 시간 업데이트 함수
    function updateElapsedTime() {
        if (!startTime) return;
        const now = Date.now();
        const elapsed = Math.floor((now - startTime) / 1000);
        elapsedTimeElem.innerText = formatTime(elapsed);
        const estimatedTotal = totalPages * ((elapsed > 0) ? (elapsed / (currentPage - 1)) : 0.5);
        const remaining = Math.max(Math.round(estimatedTotal - elapsed), 0);
        remainingTimeElem.innerText = formatTime(remaining);
    }

    // 시간 형식화 함수
    function formatTime(seconds) {
        const hrs = String(Math.floor(seconds / 3600)).padStart(2, '0');
        const mins = String(Math.floor((seconds % 3600) / 60)).padStart(2, '0');
        const secs = String(seconds % 60).padStart(2, '0');
        return `${hrs}:${mins}:${secs}`;
    }

    // 차트 업데이트 함수
    function updateChart() {
        crawlData.labels = Array.from(visitedLinks.keys());
        crawlData.datasets[0].data = Array.from(visitedLinks.values());

        // 평균 페이지 로딩 시간 계산
        let loadTimes = results.filter(r => typeof r.pageLoadTime === 'number').map(r => r.pageLoadTime);
        let averageLoadTime = loadTimes.length > 0 ? Math.round(loadTimes.reduce((a, b) => a + b, 0) / loadTimes.length) : 0;
        crawlData.datasets[1].data = Array.from(visitedLinks.keys()).map(domain => {
            const times = results.filter(r => extractDomain(r.link) === domain && typeof r.pageLoadTime === 'number').map(r => r.pageLoadTime);
            return times.length > 0 ? Math.round(times.reduce((a, b) => a + b, 0) / times.length) : 0;
        });

        if (crawlChart) {
            crawlChart.update();
        }
        GM_setValue('crawlerData', JSON.stringify(crawlData));
    }

    // 크롤 데이터 로드 함수
    function loadCrawlData() {
        const storedData = GM_getValue('crawlerData', null);
        if (storedData) {
            const parsedData = JSON.parse(storedData);
            crawlData = parsedData;
            if (crawlChart) {
                crawlChart.data = crawlData;
                crawlChart.update();
            }
        }
    }

    // 크롤 데이터 저장 함수
    function saveCrawlData() {
        GM_setValue('crawlerData', JSON.stringify(crawlData));
    }

    // 주기적으로 크롤 데이터 저장
    setInterval(saveCrawlData, 5000);

    // 검색어 및 검색 엔진 감지 함수
    function getSearchQueryAndEngine() {
        const url = window.location.href;
        if (url.includes('google.com/search')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'google';
        } else if (url.includes('bing.com/search')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'bing';
        } else if (url.includes('daum.net/search')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'daum';
        } else if (url.includes('search.naver.com/search')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('query') || '';
            searchEngine = 'naver';
        } else if (url.includes('search.yahoo.com/search')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('p') || '';
            searchEngine = 'yahoo';
        } else if (url.includes('duckduckgo.com/')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'duckduckgo';
        } else if (url.includes('startpage.com/do/search')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('query') || '';
            searchEngine = 'startpage';
        } else if (url.includes('ecosia.org/search')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'ecosia';
        } else if (url.includes('qwant.com/')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'qwant';
        } else if (url.includes('ahmia.fi/')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'ahmia';
        } else if (url.includes('torchsearch.de/')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'torch';
        } else if (url.includes('notracker.org/')) {
            const params = new URLSearchParams(window.location.search);
            searchQuery = params.get('q') || '';
            searchEngine = 'notracker';
        } else {
            searchQuery = '';
            searchEngine = '';
        }
        log(`🔍 검색 엔진: ${capitalizeFirstLetter(searchEngine)}, 검색어: "${searchQuery}"`);
    }

    // 로그 기록 함수
    function log(message) {
        const time = new Date().toLocaleTimeString();
        const entry = `[${time}] ${message}`;
        logMessages.push(entry);
        logContainer.innerHTML += `${entry}<br>`;
        logContainer.scrollTop = logContainer.scrollHeight;
        GM_setValue('crawlerLogs', JSON.stringify(logMessages));
    }

    // 결과 내보내기 함수 (중복 제거 및 정렬 추가)
    function exportResults() {
        if (results.length === 0) {
            alert('내보낼 결과가 없습니다.');
            return;
        }
        const format = prompt('내보낼 형식을 선택하세요 (xlsx, csv, json):', 'xlsx');
        if (!format) return;
        if (format.toLowerCase() === 'xlsx') {
            const ws = XLSX.utils.json_to_sheet(results);
            const wb = XLSX.utils.book_new();
            XLSX.utils.book_append_sheet(wb, ws, "결과");
            XLSX.writeFile(wb, "크롤링_결과.xlsx");
            log('💾 결과를 "크롤링_결과.xlsx" 파일로 내보냈습니다.');
            GM_notification({
                text: '결과를 "크롤링_결과.xlsx" 파일로 내보냈습니다.',
                title: '웹 크롤러 8.0',
                timeout: 3000
            });
        } else if (format.toLowerCase() === 'csv') {
            const csv = results.map(row => `"${row.title.replace(/"/g, '""')}","${row.link.replace(/"/g, '""')}","${row.description.replace(/"/g, '""')}","${row.image.replace(/"/g, '""')}","${row.htmlLink}","${row.whoisInfo}","${row.pageLoadTime}"`).join('\n');
            const blob = new Blob([csv], { type: 'text/csv;charset=utf-8;' });
            const url = URL.createObjectURL(blob);
            const a = document.createElement('a');
            a.href = url;
            a.download = '크롤링_결과.csv';
            a.click();
            log('💾 결과를 "크롤링_결과.csv" 파일로 내보냈습니다.');
            GM_notification({
                text: '결과를 "크롤링_결과.csv" 파일로 내보냈습니다.',
                title: '웹 크롤러 8.0',
                timeout: 3000
            });
        } else if (format.toLowerCase() === 'json') {
            const json = JSON.stringify(results, null, 2);
            const blob = new Blob([json], { type: 'application/json;charset=utf-8;' });
            const url = URL.createObjectURL(blob);
            const a = document.createElement('a');
            a.href = url;
            a.download = '크롤링_결과.json';
            a.click();
            log('💾 결과를 "크롤링_결과.json" 파일로 내보냈습니다.');
            GM_notification({
                text: '결과를 "크롤링_결과.json" 파일로 내보냈습니다.',
                title: '웹 크롤러 8.0',
                timeout: 3000
            });
        } else {
            alert('지원하지 않는 형식입니다.');
        }
    }

    // 결과 테이블 정렬 함수
    function sortTable(n) {
        const table = document.getElementById("resultsTable");
        let switching = true;
        let dir = "asc";
        let switchcount = 0;
        while (switching) {
            switching = false;
            const rows = table.rows;
            for (let i = 1; i < (rows.length - 1); i++) {
                let shouldSwitch = false;
                const x = rows[i].getElementsByTagName("TD")[n];
                const y = rows[i + 1].getElementsByTagName("TD")[n];
                let xContent = x.textContent || x.innerText;
                let yContent = y.textContent || y.innerText;

                // 숫자 비교
                if (n === 6) {
                    xContent = parseInt(xContent);
                    yContent = parseInt(yContent);
                }

                if (dir === "asc") {
                    if (xContent > yContent) {
                        shouldSwitch = true;
                        break;
                    }
                } else if (dir === "desc") {
                    if (xContent < yContent) {
                        shouldSwitch = true;
                        break;
                    }
                }
            }
            if (shouldSwitch) {
                rows[i].parentNode.insertBefore(rows[i + 1], rows[i]);
                switching = true;
                switchcount++;
            } else {
                if (switchcount === 0 && dir === "asc") {
                    dir = "desc";
                    switching = true;
                }
            }
        }
    }

    // 사용자 경험 향상을 위한 함수 추가
    function capitalizeFirstLetter(string) {
        if (!string) return '';
        return string.charAt(0).toUpperCase() + string.slice(1);
    }

    // 항목 검색 기능
    function filterResults() {
        const filter = searchResultsInput.value.toLowerCase();
        const rows = resultsBody.getElementsByTagName('tr');
        for (let i = 0; i < rows.length; i++) {
            const cells = rows[i].getElementsByTagName('td');
            let match = false;
            for (let j = 0; j < cells.length - 3; j++) { // 이미지, HTML 링크, WHOIS 제외
                if (cells[j].innerText.toLowerCase().includes(filter)) {
                    match = true;
                    break;
                }
            }
            rows[i].style.display = match ? '' : 'none';
        }
    }

    // 로그 초기화 함수
    function clearLogs() {
        if(confirm('로그를 초기화하시겠습니까?')) {
            logMessages = [];
            logContainer.innerHTML = `<strong>로그:</strong><br>`;
            GM_setValue('crawlerLogs', JSON.stringify(logMessages));
            log('🧹 로그를 초기화하였습니다.');
        }
    }

    // 진행률 업데이트 함수
    function updateProgress() {
        if (totalPages === 0) {
            progressBar.value = 0;
            progressText.innerText = '0%';
            return;
        }
        const progress = Math.min((currentPage - 1) / totalPages * 100, 100);
        progressBar.value = progress;
        progressText.innerText = `${Math.round(progress)}%`;
    }

})();모듈화나 코드 최적화 코드 삭제 이런 거는 절대 하지 마셈
 스크립트 시스템 대폭 대폭 개선
 스크립트 기능들도 초 격차로 대폭 대폭 개선
 기능들을 사용자의 편의성과 가독성을 위해 대폭 개선



 + 코드 가독성 향상 (주석 다는 거) 이거 진짜 하지 마셈 





그리고 내가 지금 말하는 거에 집중해 전에 말한 거 에 집중하지 말고 알겠지? 전에 한 거는 신경쓰지 마셈

그리고 "기존에 있던 기능들" 성능들 편의성이나 가도성 대폭 대폭 대폭 대폭 초 대폭 초초초초초초초초초초초초 대폭 개선하셈
 한 단계 올릴 수준으로 기능들을 대폭 개선하셈 스크립트의 수준을 한 단계 올릴 만큼

ui 대폭 대폭 편의성과 가독성을 전부다 가져온 ui 이여야 함