class RunLog extends HTMLElement {
    constructor() {
        super();
        this.attachShadow({ mode: 'open' });
        this.logFiles = [];
        this.expandedLogs = new Set();
        this.logDir = '/log'; // 直接设置日志目录路径
        // 添加分页相关的状态变量
        this.currentPage = 1;
        this.pageSize = 10; // 每页显示10个日志文件
        this.totalPages = 1;
        this.currentLogContent = []; // 存储当前日志文件的所有内容
    }

    connectedCallback() {
        this.render();
        this.setupEventListeners();
        this.loadLogFileList();
    }

    render() {
        this.shadowRoot.innerHTML = `
            <style>
                :host {
                    display: block;
                    height: 100%;
                    overflow: auto;
                    padding: 16px;
                    box-sizing: border-box;
                }

                .run-log-container {
                    background-color: white;
                    border-radius: 8px;
                    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
                    padding: 16px;
                    height: 100%;
                    box-sizing: border-box;
                    display: flex;
                    flex-direction: column;
                }

                .log-list {
                    flex: 1;
                    overflow: auto;
                }
                
                .log-item {
                    margin-bottom: 8px;
                    border-radius: 4px;
                    overflow: hidden;
                    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
                }
                
                .log-item-header {
                    display: flex;
                    justify-content: space-between;
                    align-items: center;
                    padding: 12px 16px;
                    background-color: #f5f5f5;
                }
                
                .log-item-info {
                    flex: 1;
                }
                
                .log-item-title {
                    font-weight: 500;
                    margin-bottom: 4px;
                }
                
                .log-item-time {
                    color: #666;
                    font-size: 0.9em;
                }
                
                .log-item-source {
                    color: #888;
                    font-size: 0.8em;
                    margin-top: 2px;
                }
                
                .log-item-toggle {
                    background-color: transparent;
                    color: #333;
                    border: none;
                    border-radius: 4px;
                    padding: 4px;
                    cursor: pointer;
                    transition: background-color 0.3s;
                    display: flex;
                    align-items: center;
                    justify-content: center;
                    width: 32px;
                    height: 32px;
                }
                
                .log-item-toggle img {
                    width: 16px;
                    height: 16px;
                    transition: transform 0.3s;
                }
                
                .log-item-toggle:hover {
                    background-color: rgba(0,0,0,0.05);
                }
                
                .log-item.expanded .log-item-toggle {
                    background-color: transparent;
                }
                
                .log-item-content {
                    display: none;
                    background-color: #f5f5f5;
                    padding: 0;
                    margin: 0;
                    font-family: monospace;
                    font-size: 14px;
                    line-height: 1.5;
                    white-space: pre-wrap;
                    color: #333;
                    max-height: 300px;
                    overflow: auto;
                }
                
                /* 清除所有在contentElement中可能出现的空白 */
                .log-item-content > * {
                    margin: 0;
                    padding: 0;
                }
                
                .log-item.expanded .log-item-content {
                    display: block;
                }

                .log-filters {
                    display: flex;
                    margin: 0;
                    padding: 4px 8px;
                    gap: 8px;
                    background-color: #eaeaea;
                    border-radius: 0;
                    border-bottom: 1px solid #ddd;
                    position: sticky;
                    top: 0;
                    z-index: 1;
                    line-height: normal;
                }

                .log-filter {
                    padding: 4px 12px;
                    margin: 0;
                    background-color: #f0f0f0;
                    border-radius: 16px;
                    cursor: pointer;
                    font-size: 14px;
                    user-select: none;
                }

                .log-filter.active {
                    background-color: #8B6DB3;
                    color: white;
                }

                .log-content-messages {
                    padding: 8px;
                    margin: 0;
                    display: block;
                }

                .log-message {
                    margin: 2px 0;
                    padding: 4px 8px;
                    border-bottom: 1px solid #e8e8e8;
                }

                .log-message.info {
                    color: #1890ff;
                }

                .log-message.warning {
                    color: #faad14;
                }

                .log-message.error {
                    color: #f5222d;
                }
                
                .no-logs {
                    text-align: center;
                    padding: 32px;
                    color: #999;
                }

                .pagination {
                    display: flex;
                    justify-content: center;
                    align-items: center;
                    padding: 16px;
                    gap: 8px;
                    background-color: #f5f5f5;
                    border-top: 1px solid #e0e0e0;
                }

                .pagination-button {
                    padding: 6px 12px;
                    border: 1px solid #d9d9d9;
                    background-color: white;
                    border-radius: 4px;
                    cursor: pointer;
                    font-size: 14px;
                    color: #333;
                }

                .pagination-button:hover {
                    background-color: #f0f0f0;
                }

                .pagination-button:disabled {
                    cursor: not-allowed;
                    color: #d9d9d9;
                    background-color: #f5f5f5;
                }

                .pagination-info {
                    font-size: 14px;
                    color: #666;
                }

                .pagination-actions {
                    display: flex;
                    align-items: center;
                    gap: 8px;
                    margin-left: 16px;
                }

                .log-action-button {
                    padding: 6px;
                    border: 1px solid #d9d9d9;
                    background-color: white;
                    border-radius: 4px;
                    cursor: pointer;
                    display: flex;
                    align-items: center;
                    justify-content: center;
                    width: 32px;
                    height: 32px;
                }

                .log-action-button img {
                    width: 20px;
                    height: 20px;
                }

                .log-action-button:hover {
                    background-color: #f0f0f0;
                }
            </style>
            <div class="run-log-container">
                <div class="log-list" id="logList">
                    <div class="no-logs">暂无日志记录</div>
                </div>
            </div>
        `;
    }

    setupEventListeners() {
        // 移除顶部刷新按钮的事件监听，因为按钮已经被移除
    }

    loadLogFileList() {
        this.fetchLogFiles().then(logFiles => {
            this.logFiles = logFiles;
            this.renderLogList();
        }).catch(error => {
            console.error('获取日志文件列表失败:', error);
        });
    }

    async fetchLogFiles() {
        try {
            // 直接使用固定的日志目录路径
            const logDirPath = this.logDir;
            
            // 读取目录下的所有文件
            const files = await this.readLogDirectory(logDirPath);
            
            // 过滤出.log文件并获取文件信息
            const logFiles = [];
            for (const fileName of files) {
                if (fileName.endsWith('.log')) {
                    const filePath = `${logDirPath}/${fileName}`;
                    const fileStats = await this.getFileStats(filePath);
                    
                    // 格式化修改时间
                    const modTime = new Date(fileStats.mtime);
                    const formattedTime = this.formatDateTime(modTime);
                    
                    logFiles.push({
                        name: fileName,
                        time: formattedTime,
                        path: filePath
                    });
                }
            }
            
            // 按修改时间排序，最新的在前面
            return logFiles.sort((a, b) => {
                return new Date(b.time) - new Date(a.time);
            });
        } catch (error) {
            console.error('获取日志文件列表失败:', error);
            return [];
        }
    }
    
    // 读取目录内容
    async readLogDirectory(dirPath) {
        return new Promise((resolve, reject) => {
            fetch(`/api/filesystem/readdir?path=${encodeURIComponent(dirPath)}`)
                .then(response => {
                    if (!response.ok) {
                        throw new Error(`读取目录失败: ${response.status}`);
                    }
                    return response.json();
                })
                .then(data => {
                    resolve(data.files || []);
                })
                .catch(error => {
                    console.error('读取目录请求失败:', error);
                    reject(error);
                });
        });
    }
    
    // 获取文件状态信息
    async getFileStats(filePath) {
        return new Promise((resolve, reject) => {
            fetch(`/api/filesystem/stat?path=${encodeURIComponent(filePath)}`)
                .then(response => {
                    if (!response.ok) {
                        throw new Error(`获取文件信息失败: ${response.status}`);
                    }
                    return response.json();
                })
                .then(data => resolve(data))
                .catch(error => reject(error));
        });
    }
    
    // 格式化日期时间
    formatDateTime(date) {
        const year = date.getFullYear();
        const month = String(date.getMonth() + 1).padStart(2, '0');
        const day = String(date.getDate()).padStart(2, '0');
        const hours = String(date.getHours()).padStart(2, '0');
        const minutes = String(date.getMinutes()).padStart(2, '0');
        const seconds = String(date.getSeconds()).padStart(2, '0');
        
        return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
    }

    renderLogList() {
        const logListElement = this.shadowRoot.getElementById('logList');
        
        if (this.logFiles.length === 0) {
            logListElement.innerHTML = '<div class="no-logs">暂无日志记录</div>';
            return;
        }
        
        // 计算总页数
        this.totalPages = Math.ceil(this.logFiles.length / this.pageSize);
        
        // 获取当前页的日志文件
        const start = (this.currentPage - 1) * this.pageSize;
        const end = start + this.pageSize;
        const currentPageFiles = this.logFiles.slice(start, end);
        
        // 清空列表
        logListElement.innerHTML = '';
        
        // 渲染当前页的日志文件
        currentPageFiles.forEach(logFile => {
            const logItemElement = document.createElement('div');
            logItemElement.className = 'log-item';
            logItemElement.dataset.path = logFile.path;
            
            const isExpanded = this.expandedLogs.has(logFile.path);
            if (isExpanded) {
                logItemElement.classList.add('expanded');
            }
            
            const iconSrc = isExpanded ? 'assets/icons/png/chevron-up_b.png' : 'assets/icons/png/chevron-down_b.png';
            const iconAlt = isExpanded ? '收起' : '展开';
            
            logItemElement.innerHTML = `
                <div class="log-item-header">
                    <div class="log-item-info">
                        <div class="log-item-title">${logFile.name}</div>
                        <div class="log-item-time">${logFile.time}</div>
                    </div>
                    <button class="log-item-toggle">
                        <img src="${iconSrc}" alt="${iconAlt}">
                    </button>
                </div>
                <div class="log-item-content"></div>
            `;
            
            const toggleBtn = logItemElement.querySelector('.log-item-toggle');
            const toggleImg = toggleBtn.querySelector('img');
            const content = logItemElement.querySelector('.log-item-content');
            
            toggleBtn.addEventListener('click', () => {
                const isExpanded = logItemElement.classList.contains('expanded');
                
                if (isExpanded) {
                    logItemElement.classList.remove('expanded');
                    this.expandedLogs.delete(logFile.path);
                    content.innerHTML = '';
                    toggleImg.src = 'assets/icons/png/chevron-down_b.png';
                    toggleImg.alt = '展开';
                } else {
                    logItemElement.classList.add('expanded');
                    this.expandedLogs.add(logFile.path);
                    this.loadLogContent(logFile.path, content);
                    toggleImg.src = 'assets/icons/png/chevron-up_b.png';
                    toggleImg.alt = '收起';
                }
            });
            
            if (isExpanded) {
                this.loadLogContent(logFile.path, content);
            }
            
            logListElement.appendChild(logItemElement);
        });
        
        // 添加分页控制器和刷新按钮
        const paginationHtml = `
            <div class="pagination">
                <button class="pagination-button" id="prevPage" ${this.currentPage === 1 ? 'disabled' : ''}>
                    上一页
                </button>
                <span class="pagination-info">
                    第 ${this.currentPage} 页 / 共 ${this.totalPages} 页
                </span>
                <button class="pagination-button" id="nextPage" ${this.currentPage === this.totalPages ? 'disabled' : ''}>
                    下一页
                </button>
                <div class="pagination-actions">
                    <button class="log-action-button" id="refreshLog" title="刷新">
                        <img src="assets/icons/png/refresh_b.png" alt="刷新">
                    </button>
                </div>
            </div>
        `;
        
        logListElement.insertAdjacentHTML('beforeend', paginationHtml);
        
        // 添加分页按钮事件监听
        const prevButton = logListElement.querySelector('#prevPage');
        const nextButton = logListElement.querySelector('#nextPage');
        const refreshButton = logListElement.querySelector('#refreshLog');
        
        prevButton.addEventListener('click', () => {
            if (this.currentPage > 1) {
                this.currentPage--;
                this.renderLogList();
            }
        });
        
        nextButton.addEventListener('click', () => {
            if (this.currentPage < this.totalPages) {
                this.currentPage++;
                this.renderLogList();
            }
        });

        refreshButton.addEventListener('click', () => {
            this.loadLogFileList();
        });
    }

    loadLogContent(logPath, contentElement) {
        contentElement.innerHTML = '<div style="padding: 8px;">加载中...</div>';
        
        this.fetchLogContent(logPath).then(content => {
            let html = '<div class="log-filters">';
            html += '<div class="log-filter active" data-level="all">全部</div>';
            html += '<div class="log-filter" data-level="info">信息</div>';
            html += '<div class="log-filter" data-level="warning">警告</div>';
            html += '<div class="log-filter" data-level="error">错误</div>';
            html += '</div><div class="log-content-messages">';
            
            if (!content || content.length === 0) {
                html += '<div style="padding: 8px;">日志为空</div>';
            } else {
                content.forEach(line => {
                    let className = 'log-message';
                    
                    if (line.includes('[INFO]')) {
                        className += ' info';
                    } else if (line.includes('[WARNING]')) {
                        className += ' warning';
                    } else if (line.includes('[ERROR]')) {
                        className += ' error';
                    }
                    
                    html += `<div class="${className}">${line}</div>`;
                });
            }
            
            html += '</div>';
            contentElement.innerHTML = html;
            
            // 设置过滤器事件
            const filterElements = contentElement.querySelectorAll('.log-filter');
            filterElements.forEach(filter => {
                filter.addEventListener('click', () => {
                    filterElements.forEach(f => f.classList.remove('active'));
                    filter.classList.add('active');
                    
                    const level = filter.getAttribute('data-level');
                    const messagesContainer = contentElement.querySelector('.log-content-messages');
                    this.filterLogContent(messagesContainer, level);
                });
            });
            
        }).catch(error => {
            contentElement.innerHTML = `<div class="log-message error" style="padding: 8px;">加载日志内容失败: ${error.message}</div>`;
        });
    }

    async fetchLogContent(logPath) {
        try {
            const response = await fetch(`/api/filesystem/readFile?path=${encodeURIComponent(logPath)}`);
            if (!response.ok) {
                throw new Error(`读取文件失败: ${response.status}`);
            }
            
            const fileContent = await response.text();
            
            // 解析日志内容，按行分割
            const lines = fileContent.split('\n')
                .filter(line => line.trim() !== '')  // 过滤空行
                .slice(-500);  // 只显示最后500行，避免日志过大
            
            return lines;
        } catch (error) {
            console.error('获取日志内容失败:', error);
            return [];
        }
    }

    filterLogContent(contentElement, level) {
        const logMessages = contentElement.querySelectorAll('.log-message');
        
        logMessages.forEach(message => {
            if (level === 'all') {
                message.style.display = 'block';
            } else {
                message.style.display = message.classList.contains(level) ? 'block' : 'none';
            }
        });
    }
}

customElements.define('run-log', RunLog);