// API基础地址
const API_BASE = '';

// 搜索结果存储
let searchResults = [];
let currentResultIndex = -1;

// 自动流程控制
let shouldStop = false;

// 页面加载初始化
document.addEventListener('DOMContentLoaded', () => {
    // 回车搜索
    document.getElementById('search-keyword').addEventListener('keypress', (e) => {
        if (e.key === 'Enter') {
            doSearch();
        }
    });
    
    // 加载失败URL
    loadFailedUrls();
});

// 执行搜索
async function doSearch() {
    const keyword = document.getElementById('search-keyword').value.trim();
    const maxResults = parseInt(document.getElementById('search-count').value) || 10;
    const engine = document.getElementById('search-engine').value;
    const useCache = document.getElementById('use-cache').checked;
    const autoFetch = document.getElementById('auto-fetch').checked;
    const autoSave = document.getElementById('auto-save').checked;

    if (!keyword) {
        showToast('请输入搜索关键词', 'error');
        return;
    }

    // 更新状态
    const engineNames = {
        'bing_cn': 'Bing 中国',
        'bing_global': 'Bing 国际',
        'google': 'Google',
        'baidu': '百度'
    };
    updateStatus('searching', `正在通过 ${engineNames[engine]} 搜索...`);
    document.getElementById('search-btn').disabled = true;
    
    // 显示进度
    const progress = document.getElementById('search-progress');
    progress.style.display = 'block';
    document.getElementById('progress-fill').style.width = '0%';
    document.getElementById('progress-text').textContent = '正在搜索...';

    try {
        const response = await fetch(`${API_BASE}/api/articles/internet-search`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ keyword, max_results: maxResults, engine, use_cache: useCache })
        });

        const data = await response.json();

        if (data.success) {
            searchResults = data.results.map(r => ({
                ...r,
                fetched: false,
                saved: false,
                content: ''
            }));

            displayResults();
            
            // 显示缓存状态
            if (data.cached) {
                updateStatus('success', `找到 ${searchResults.length} 条结果（使用缓存）`);
                showToast('使用缓存结果', 'success');
            } else {
                updateStatus('success', `找到 ${searchResults.length} 条结果`);
            }
            
            document.getElementById('results-count').textContent = `${searchResults.length} 条结果`;
            document.getElementById('save-all-btn').disabled = searchResults.length === 0;

            document.getElementById('progress-fill').style.width = '100%';
            document.getElementById('progress-text').textContent = '搜索完成！';

            // 自动抓取和保存
            if (autoFetch && searchResults.length > 0) {
                setTimeout(() => fetchAllResults(autoSave), 500);
            }
        } else {
            updateStatus('error', '搜索失败');
            showToast('搜索失败: ' + data.error, 'error');
        }
    } catch (error) {
        updateStatus('error', '搜索出错');
        showToast('搜索出错', 'error');
        console.error(error);
    }

    setTimeout(() => {
        progress.style.display = 'none';
    }, 1000);

    document.getElementById('search-btn').disabled = false;
}

// 显示搜索结果
function displayResults() {
    const container = document.getElementById('search-results');

    if (searchResults.length === 0) {
        container.innerHTML = '<div class="empty-text">未找到相关结果</div>';
        return;
    }

    container.innerHTML = searchResults.map((r, i) => `
        <div class="result-item ${r.saved ? 'saved' : ''} ${r.fetched ? 'fetched' : ''}" id="result-${i}">
            <div class="result-number">${i + 1}</div>
            <div class="result-main">
                <div class="result-title" onclick="showResultDetail(${i})">
                    ${r.saved ? '<i class="ri-check-line saved-icon"></i>' : ''}
                    ${escapeHtml(r.title)}
                </div>
                <div class="result-url">
                    <a href="${escapeHtml(r.url)}" target="_blank">
                        <i class="ri-external-link-line"></i>
                        ${escapeHtml(r.url.substring(0, 70))}${r.url.length > 70 ? '...' : ''}
                    </a>
                </div>
                ${r.content ? `<div class="result-content-preview">${escapeHtml(r.content.substring(0, 100))}...</div>` : ''}
            </div>
            <div class="result-actions">
                <button onclick="fetchResult(${i})" class="btn btn-sm btn-secondary" id="fetch-btn-${i}" ${r.fetched ? 'disabled' : ''}>
                    <i class="ri-download-line"></i> ${r.fetched ? '已抓取' : '抓取'}
                </button>
                <button onclick="saveResult(${i})" class="btn btn-sm btn-success" id="save-btn-${i}" ${r.saved ? 'disabled' : ''}>
                    <i class="ri-save-line"></i> ${r.saved ? '已保存' : '保存'}
                </button>
            </div>
        </div>
    `).join('');
}

// 检查URL是否已在内容库
async function checkUrlExists(url) {
    try {
        const response = await fetch(`${API_BASE}/api/articles/search?q=${encodeURIComponent(url)}`);
        const data = await response.json();
        if (data.success && data.articles && data.articles.length > 0) {
            // 检查是否有完全匹配的 URL
            return data.articles.some(a => a.url === url);
        }
    } catch (error) {
        console.error('检查URL失败:', error);
    }
    return false;
}

// 抓取单个结果
async function fetchResult(index) {
    const result = searchResults[index];
    if (!result || result.fetched) return;

    const btn = document.getElementById(`fetch-btn-${index}`);
    btn.disabled = true;
    btn.innerHTML = '<i class="ri-loader-4-line"></i> 检查中...';

    // 先检查内容库是否已存在
    const exists = await checkUrlExists(result.url);
    if (exists) {
        searchResults[index].fetched = true;
        searchResults[index].saved = true;
        searchResults[index].content = '[内容库中已存在此链接]';
        btn.innerHTML = '<i class="ri-check-line"></i> 已存在';
        btn.className = 'btn btn-sm btn-warning';
        
        const saveBtn = document.getElementById(`save-btn-${index}`);
        saveBtn.disabled = true;
        saveBtn.innerHTML = '<i class="ri-check-line"></i> 已存在';
        
        const item = document.getElementById(`result-${index}`);
        item.classList.add('saved');
        
        showToast('该链接已在内容库中', 'warning');
        return;
    }

    btn.innerHTML = '<i class="ri-loader-4-line"></i> 抓取中...';

    try {
        const response = await fetch(`${API_BASE}/api/articles/fetch`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({
                url: result.url,
                product_names: [result.title]
            })
        });

        const data = await response.json();

        if (data.success) {
            searchResults[index].fetched = true;
            searchResults[index].content = data.data.content;
            searchResults[index].title = data.data.title || result.title;
            
            btn.innerHTML = '<i class="ri-check-line"></i> 已抓取';
            
            // 更新结果显示
            const item = document.getElementById(`result-${index}`);
            item.classList.add('fetched');
            
            showToast('抓取成功', 'success');
            displayResults();
        } else {
            // 记录失败URL
            await recordFailedUrl(result.url, result.title, data.error);
            btn.disabled = false;
            btn.innerHTML = '<i class="ri-download-line"></i> 抓取';
            btn.className = 'btn btn-sm btn-danger';
            showToast('抓取失败: ' + data.error, 'error');
        }
    } catch (error) {
        // 记录失败URL
        await recordFailedUrl(result.url, result.title, '抓取出错');
        btn.disabled = false;
        btn.innerHTML = '<i class="ri-download-line"></i> 抓取';
        btn.className = 'btn btn-sm btn-danger';
        showToast('抓取出错', 'error');
    }
}

// 记录失败的URL
async function recordFailedUrl(url, title, errorMessage) {
    try {
        await fetch(`${API_BASE}/api/articles/failed-urls`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ url, title, error_message: errorMessage })
        });
    } catch (error) {
        console.error('记录失败URL出错:', error);
    }
}

// 保存单个结果
async function saveResult(index) {
    const result = searchResults[index];
    if (!result) return;

    // 如果已经保存（可能是内容库中已存在），直接返回
    if (result.saved) {
        return;
    }

    // 如果未抓取，先抓取
    if (!result.fetched) {
        await fetchResult(index);
        // 抓取后如果已标记为 saved（内容库已存在），不继续保存
        if (searchResults[index].saved) return;
    }

    const btn = document.getElementById(`save-btn-${index}`);
    btn.disabled = true;
    btn.innerHTML = '<i class="ri-loader-4-line"></i> 保存中...';

    try {
        const response = await fetch(`${API_BASE}/api/articles`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({
                product_names: [searchResults[index].title],
                category: '',
                keywords: [],
                summary: searchResults[index].content.substring(0, 200),
                content: searchResults[index].content,
                source: searchResults[index].url,
                url: searchResults[index].url
            })
        });

        const data = await response.json();

        if (data.success) {
            searchResults[index].saved = true;
            btn.innerHTML = '<i class="ri-check-line"></i> 已保存';
            
            const item = document.getElementById(`result-${index}`);
            item.classList.add('saved');
            
            showToast('保存成功', 'success');
            displayResults();
        } else {
            btn.disabled = false;
            btn.innerHTML = '<i class="ri-save-line"></i> 保存';
            showToast('保存失败: ' + data.error, 'error');
        }
    } catch (error) {
        btn.disabled = false;
        btn.innerHTML = '<i class="ri-save-line"></i> 保存';
        showToast('保存出错', 'error');
    }
}

// 一键保存全部
async function saveAllResults() {
    const unsaved = searchResults.filter(r => !r.saved);
    if (unsaved.length === 0) {
        showToast('没有需要保存的结果', 'error');
        return;
    }

    const progress = document.getElementById('save-progress');
    progress.style.display = 'block';
    
    let saved = 0;
    const total = unsaved.length;

    for (let i = 0; i < searchResults.length; i++) {
        if (searchResults[i].saved) continue;

        document.getElementById('save-progress-text').textContent = 
            `正在保存 ${saved + 1}/${total}...`;
        document.getElementById('save-fill').style.width = 
            `${(saved / total) * 100}%`;

        await saveResult(i);
        saved++;
    }

    document.getElementById('save-fill').style.width = '100%';
    document.getElementById('save-progress-text').textContent = '保存完成！';

    setTimeout(() => {
        progress.style.display = 'none';
    }, 1500);

    showToast(`成功保存 ${saved} 条结果`, 'success');
}

// 抓取所有结果
async function fetchAllResults(autoSave) {
    shouldStop = false;  // 重置停止标志
    
    const progress = document.getElementById('search-progress');
    progress.style.display = 'block';
    document.getElementById('stop-btn').style.display = 'inline-flex';  // 显示停止按钮

    const total = searchResults.length;
    let fetched = 0;

    for (let i = 0; i < searchResults.length; i++) {
        // 检查是否停止
        if (shouldStop) {
            document.getElementById('progress-text').textContent = `已停止（已抓取 ${fetched}/${total}）`;
            document.getElementById('stop-btn').style.display = 'none';
            setTimeout(() => {
                progress.style.display = 'none';
            }, 2000);
            showToast('自动抓取已停止', 'warning');
            return;
        }
        
        if (searchResults[i].fetched) {
            fetched++;
            continue;
        }

        document.getElementById('progress-text').textContent = 
            `正在抓取 ${fetched + 1}/${total}...`;
        document.getElementById('progress-fill').style.width = 
            `${(fetched / total) * 100}%`;

        await fetchResult(i);
        fetched++;
    }

    document.getElementById('progress-fill').style.width = '100%';
    document.getElementById('progress-text').textContent = '抓取完成！';
    document.getElementById('stop-btn').style.display = 'none';

    setTimeout(() => {
        progress.style.display = 'none';
    }, 1000);

    // 自动保存
    if (autoSave) {
        setTimeout(() => saveAllResults(), 500);
    }
}

// 停止自动处理
function stopAutoProcess() {
    shouldStop = true;
}

// 显示结果详情
function showResultDetail(index) {
    currentResultIndex = index;
    const result = searchResults[index];
    
    const body = document.getElementById('result-detail-body');
    body.innerHTML = `
        <div class="detail-meta">
            <div class="detail-meta-item">
                <label>标题</label>
                <span>${escapeHtml(result.title)}</span>
            </div>
            <div class="detail-meta-item">
                <label>URL</label>
                <a href="${escapeHtml(result.url)}" target="_blank">${escapeHtml(result.url)}</a>
            </div>
            <div class="detail-meta-item">
                <label>状态</label>
                <span>${result.fetched ? '已抓取' : '未抓取'} / ${result.saved ? '已保存' : '未保存'}</span>
            </div>
        </div>
        ${result.content ? `
        <div class="detail-section">
            <h4><i class="ri-file-text-line"></i> 页面内容</h4>
            <pre style="white-space: pre-wrap; max-height: 400px; overflow-y: auto; background: #f8f9fa; padding: 15px; border-radius: 8px;">${escapeHtml(result.content.substring(0, 3000))}${result.content.length > 3000 ? '\n...(内容过长，已截断)' : ''}</pre>
        </div>
        ` : '<div class="detail-section"><p>尚未抓取内容，点击"保存到内容库"将自动抓取并保存</p></div>'}
    `;

    document.getElementById('result-detail-modal').classList.add('active');
}

// 保存当前结果
async function saveCurrentResult() {
    if (currentResultIndex >= 0) {
        await saveResult(currentResultIndex);
        closeModal('result-detail-modal');
    }
}

// 清空结果
function clearResults() {
    searchResults = [];
    displayResults();
    document.getElementById('results-count').textContent = '0 条结果';
    document.getElementById('save-all-btn').disabled = true;
    updateStatus('ready', '就绪');
}

// 更新状态
function updateStatus(status, text) {
    const dot = document.getElementById('search-status');
    const statusText = document.getElementById('status-text');
    
    dot.className = 'status-dot';
    if (status === 'searching') {
        dot.style.background = '#f59e0b';
    } else if (status === 'success') {
        dot.style.background = '#10b981';
    } else if (status === 'error') {
        dot.style.background = '#ef4444';
    } else {
        dot.style.background = '#10b981';
    }
    
    statusText.textContent = text;
}

// 关闭模态框
function closeModal(modalId) {
    document.getElementById(modalId).classList.remove('active');
}

// 显示提示
function showToast(message, type = '') {
    const toast = document.getElementById('toast');
    toast.textContent = message;
    toast.className = `toast active ${type}`;
    
    setTimeout(() => {
        toast.classList.remove('active');
    }, 3000);
}

// HTML转义
function escapeHtml(text) {
    if (!text) return '';
    const div = document.createElement('div');
    div.textContent = text;
    return div.innerHTML;
}

// ========== 失败URL管理 ==========

// 加载失败URL列表
async function loadFailedUrls() {
    try {
        const response = await fetch(`${API_BASE}/api/articles/failed-urls`);
        const data = await response.json();
        
        if (data.success) {
            document.getElementById('failed-count').textContent = `${data.count} 条`;
            
            const container = document.getElementById('failed-urls-list');
            
            if (data.urls.length === 0) {
                container.innerHTML = '<div class="empty-text">暂无失败记录</div>';
            } else {
                container.innerHTML = data.urls.map(url => `
                    <div class="failed-url-item" id="failed-${url.id}">
                        <div class="failed-url-info">
                            <div class="failed-url-title">${escapeHtml(url.title || url.url.substring(0, 50))}</div>
                            <div class="failed-url-detail">
                                <a href="${escapeHtml(url.url)}" target="_blank">
                                    <i class="ri-external-link-line"></i> ${escapeHtml(url.url.substring(0, 60))}${url.url.length > 60 ? '...' : ''}
                                </a>
                                <span class="failed-error">${escapeHtml(url.error_message || '未知错误')}</span>
                            </div>
                            <div class="failed-url-meta">
                                <span>重试: ${url.retry_count || 0} 次</span>
                                <span>${url.created_at || ''}</span>
                            </div>
                        </div>
                        <div class="failed-url-actions">
                            <button onclick="retryFailedUrl(${url.id}, '${escapeHtml(url.url)}')" class="btn btn-sm btn-warning">
                                <i class="ri-restart-line"></i> 重试
                            </button>
                            <button onclick="deleteFailedUrl(${url.id})" class="btn btn-sm btn-danger">
                                <i class="ri-delete-bin-line"></i>
                            </button>
                        </div>
                    </div>
                `).join('');
            }
        }
    } catch (error) {
        console.error('加载失败URL出错:', error);
    }
}

// 重试单个失败URL
async function retryFailedUrl(urlId, url) {
    const item = document.getElementById(`failed-${urlId}`);
    item.classList.add('loading');
    
    try {
        const response = await fetch(`${API_BASE}/api/articles/failed-urls/retry`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ url })
        });
        
        const data = await response.json();
        
        if (data.success) {
            showToast('重试成功', 'success');
            loadFailedUrls();
        } else {
            showToast('重试失败: ' + data.error, 'error');
            item.classList.remove('loading');
        }
    } catch (error) {
        showToast('重试出错', 'error');
        item.classList.remove('loading');
    }
}

// 全部重试
async function retryAllFailed() {
    showToast('正在重试所有失败URL...', '');
    
    const response = await fetch(`${API_BASE}/api/articles/failed-urls`);
    const data = await response.json();
    
    if (data.success && data.urls.length > 0) {
        for (const url of data.urls) {
            await retryFailedUrl(url.id, url.url);
            await new Promise(r => setTimeout(r, 500)); // 避免太快
        }
    }
}

// 删除失败URL记录
async function deleteFailedUrl(urlId) {
    try {
        await fetch(`${API_BASE}/api/articles/failed-urls/${urlId}`, {
            method: 'DELETE'
        });
        loadFailedUrls();
    } catch (error) {
        showToast('删除失败', 'error');
    }
}

// 清空所有失败URL
async function clearFailedUrls() {
    if (!confirm('确定要清空所有失败记录吗？')) return;
    
    try {
        await fetch(`${API_BASE}/api/articles/failed-urls/clear`, {
            method: 'POST'
        });
        showToast('已清空', 'success');
        loadFailedUrls();
    } catch (error) {
        showToast('清空失败', 'error');
    }
}