@{
    ViewData["Title"] = "客户端消息队列";
    var address = ViewBag.Address as string ?? "TestClient";
}

<style>
    /* 页面容器 */
    .card-body {
        height: calc(100vh - 280px);
        display: flex;
        flex-direction: column;
        overflow: hidden;
    }
    
    .message-scroll-area {
        flex: 1;
        min-height: 0;
        overflow-y: auto;
        overflow-x: hidden;
        border: 1px solid #dee2e6;
        border-radius: 0.25rem;
        background-color: #f8f9fa;
        position: relative;
    }
    
    .log-files-panel {
        background-color: #f8f9fa;
        border: 1px solid #dee2e6;
        border-radius: 0.25rem;
        padding: 1rem;
        margin-bottom: 1rem;
        max-height: 180px;
        overflow-y: auto;
        flex-shrink: 0;
    }
    
    .log-file-item {
        background: white;
        border: 1px solid #dee2e6;
        border-radius: 0.25rem;
        padding: 8px;
        margin-bottom: 8px;
        transition: all 0.2s;
    }
    
    .log-file-item:hover {
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }
    
    .log-file-actions {
        display: flex;
        gap: 5px;
        margin-top: 8px;
    }
    
    .log-file-actions .btn {
        font-size: 0.8rem;
        padding: 2px 8px;
    }
    
    /* 按钮组间距 */
    .card-tools {
        display: flex;
        gap: 0.5rem;
        align-items: center;
    }
    
    .card-tools .btn {
        margin-left: 0;
    }
    
    /* 确保内容区域不会超出容器 */
    .clusterize-content {
        padding: 10px;
    }
    
    /* 消息卡片样式 */
    .message-card {
        margin-bottom: 10px;
        border-radius: 0.25rem;
    }
    
    /* 消息区域行容器 */
    .row.p-4 {
        flex: 1;
        display: flex;
        min-height: 0;
        margin: 0;
        padding: 1rem !important;
    }
    
    .row.p-4 .col-md-6 {
        display: flex;
        flex-direction: column;
    }
    
    .row.p-4 .col-md-6 .card {
        flex: 1;
        display: flex;
        flex-direction: column;
        margin-bottom: 0;
    }
    
    .row.p-4 .col-md-6 .card .card-body {
        flex: 1;
        padding: 0;
        display: flex;
        flex-direction: column;
    }
    
    /* 自定义滚动条 */
    .message-scroll-area::-webkit-scrollbar,
    .log-files-panel::-webkit-scrollbar {
        width: 6px;
    }
    
    .message-scroll-area::-webkit-scrollbar-track,
    .log-files-panel::-webkit-scrollbar-track {
        background: #f1f1f1;
        border-radius: 3px;
    }
    
    .message-scroll-area::-webkit-scrollbar-thumb,
    .log-files-panel::-webkit-scrollbar-thumb {
        background: #c1c1c1;
        border-radius: 3px;
    }
    
    .message-scroll-area::-webkit-scrollbar-thumb:hover,
    .log-files-panel::-webkit-scrollbar-thumb:hover {
        background: #a8a8a8;
    }
    
    /* 响应式高度调整 */
    @@media (max-width: 768px) {
        .card-body {
            height: calc(100vh - 240px);
        }
        
        .log-files-panel {
            max-height: 150px;
        }
        
        .row.p-4 {
            padding: 0.75rem !important;
        }
    }
    
    @@media (max-width: 576px) {
        .card-body {
            height: calc(100vh - 220px);
        }
        
        .log-files-panel {
            max-height: 120px;
        }
        
        .row.p-4 {
            padding: 0.5rem !important;
        }
    }
</style>

<div class="container">
    <div class="row">
        <div class="col-12">
            <div class="card">
                <div class="card-header">
                    <h3 class="card-title">客户端消息队列 - @address</h3>
                    <div class="card-tools">
                        <span id="connection-status" class="badge badge-secondary">正在连接...</span>
                        <button id="refreshLogFiles" class="btn btn-outline-primary btn-sm">
                            <i class="fas fa-sync-alt"></i> 刷新日志文件
                        </button>
                    </div>
                </div>
                <div class="card-body p-0">
                    <!-- 日志文件管理面板 -->
                    <div class="log-files-panel">
                        <div class="d-flex justify-content-between align-items-center mb-2">
                            <h5><i class="fas fa-file-alt"></i> 消息日志文件管理</h5>
                            <div class="d-flex align-items-center">
                                <button id="refreshLogFilesBtn" class="btn btn-outline-primary btn-sm mr-2" title="刷新日志文件列表">
                                    <i class="fas fa-sync-alt"></i>
                                </button>
                                <div id="logStats" class="text-muted small">
                                    <span id="totalFiles">0</span> 个文件 | 
                                    <span id="totalSize">0</span> KB | 
                                    <span id="lastUpdate">-</span>
                                    <span class="ml-2" id="autoRefreshIndicator" title="自动刷新中">
                                        <i class="fas fa-sync-alt fa-spin"></i>
                                    </span>
                                </div>
                            </div>
                        </div>
                        <div id="logFilesContainer">
                            <div class="text-muted">正在加载日志文件列表...</div>
                        </div>
                    </div>
                    
                    <div class="row p-4">
                        <div class="col-md-6">
                            <div class="card">
                                <div class="card-header">
                                    <h5 class="card-title">
                                        <i class="fas fa-paper-plane text-success"></i> 发送消息
                                        <span class="badge badge-primary" id="sentCount">0</span>
                                    </h5>
                                </div>
                                <div id="sentScrollArea" class="clusterize-scroll message-scroll-area">
                                    <div id="sentContentArea" class="clusterize-content">
                                        <div class="clusterize-no-data">正在连接...</div>
                                    </div>
                                </div>
                            </div>
                        </div>
                        <div class="col-md-6">
                            <div class="card">
                                <div class="card-header">
                                    <h5 class="card-title">
                                        <i class="fas fa-download text-info"></i> 接收消息
                                        <span class="badge badge-info" id="receivedCount">0</span>
                                    </h5>
                                </div>
                                <div id="receivedScrollArea" class="clusterize-scroll message-scroll-area">
                                    <div id="receivedContentArea" class="clusterize-content">
                                        <div class="clusterize-no-data">正在连接...</div>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

<!-- 日志文件内容模态框 -->
<div class="modal fade" id="logContentModal" tabindex="-1" role="dialog">
    <div class="modal-dialog modal-xl" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="logContentModalTitle">日志文件内容</h5>
                <button type="button" class="close" data-dismiss="modal">
                    <span>&times;</span>
                </button>
            </div>
            <div class="modal-body">
                <div class="form-group">
                    <label for="logContentLines">显示行数:</label>
                    <select id="logContentLines" class="form-control" style="width: 150px;">
                        <option value="50">最近50行</option>
                        <option value="100" selected>最近100行</option>
                        <option value="200">最近200行</option>
                        <option value="500">最近500行</option>
                        <option value="1000">最近1000行</option>
                    </select>
                </div>
                <div id="logContentContainer">
                    <div class="text-muted">正在加载日志内容...</div>
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-dismiss="modal">关闭</button>
            </div>
        </div>
    </div>
</div>

@section Scripts {
    <!-- Clusterize.js for virtual scrolling -->
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/clusterize.js/0.19.0/clusterize.min.css">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/clusterize.js/0.19.0/clusterize.min.js"></script>

    <!-- highlight.js for syntax highlighting -->
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.7.0/styles/github.min.css">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.7.0/highlight.min.js"></script>

    <script>
        const address = '@address';
        const MAX_MESSAGES_IN_MEMORY = 10000; // JS内存中最多保留1万条数据
        
        let sentMessagesData = [];
        let receivedMessagesData = [];
        let sentClusterize, receivedClusterize;
        let currentLogFileName = '';
        let logFilesAutoRefreshInterval = null;

        $(document).ready(function() {
            // 初始化虚拟滚动列表
            sentClusterize = new Clusterize({
                rows: [],
                scrollId: 'sentScrollArea',
                contentId: 'sentContentArea',
                tag: 'div',
                rows_in_block: 20,
                blocks_in_cluster: 4,
                no_data_text: '暂无发送消息'
            });

            receivedClusterize = new Clusterize({
                rows: [],
                scrollId: 'receivedScrollArea',
                contentId: 'receivedContentArea',
                tag: 'div',
                rows_in_block: 20,
                blocks_in_cluster: 4,
                no_data_text: '暂无接收消息'
            });

            // 只有 address 有效时才启动SSE连接
            if (address && address !== "null" && address.trim() !== "") {
                initializeEventSource();
            } else {
                $('#connection-status').removeClass('badge-secondary').addClass('badge-danger').text('未指定客户端地址，无法连接消息流');
            }
            
            // 加载日志文件列表
            loadLogFiles();
            
            // 启动自动刷新（每10秒检查一次）
            startLogFilesAutoRefresh();
            
            // 绑定事件
            $('#refreshLogFiles').click(loadLogFiles);
            $('#refreshLogFilesBtn').click(function() {
                $(this).find('i').addClass('fa-spin');
                loadLogFiles();
                setTimeout(() => {
                    $(this).find('i').removeClass('fa-spin');
                }, 1000);
            });
            $('#logContentLines').change(function() {
                if (currentLogFileName) {
                    loadLogContent(currentLogFileName, $(this).val());
                }
            });
            
            // 页面卸载时清理定时器
            $(window).on('beforeunload', function() {
                stopLogFilesAutoRefresh();
            });
        });

        // 启动日志文件自动刷新
        function startLogFilesAutoRefresh() {
            if (logFilesAutoRefreshInterval) {
                clearInterval(logFilesAutoRefreshInterval);
            }
            logFilesAutoRefreshInterval = setInterval(function() {
                loadLogFiles();
            }, 10000); // 每10秒刷新一次
        }

        // 停止日志文件自动刷新
        function stopLogFilesAutoRefresh() {
            if (logFilesAutoRefreshInterval) {
                clearInterval(logFilesAutoRefreshInterval);
                logFilesAutoRefreshInterval = null;
            }
        }

        // 加载日志文件列表
        function loadLogFiles() {
            $('#logFilesContainer').html('<div class="text-muted">正在加载日志文件列表...</div>');
            
            $.get('/api/message/logs')
                .done(function(response) {
                    if (response.files && response.files.length > 0) {
                        const filesHtml = response.files.map(file => createLogFileItemHtml(file)).join('');
                        $('#logFilesContainer').html(filesHtml);
                        
                        // 更新统计信息
                        const totalSize = response.files.reduce((sum, file) => sum + file.size, 0);
                        const totalSizeKB = Math.round(totalSize / 1024 * 100) / 100;
                        const nonEmptyFiles = response.files.filter(file => file.size > 0).length;
                        
                        $('#totalFiles').text(`${nonEmptyFiles}/${response.files.length}`);
                        $('#totalSize').text(totalSizeKB);
                        $('#lastUpdate').text(new Date().toLocaleTimeString());
                    } else {
                        $('#logFilesContainer').html(`
                            <div class="text-center py-3">
                                <i class="fas fa-file-alt fa-2x text-muted mb-2"></i>
                                <div class="text-muted">暂无日志文件</div>
                                <small class="text-muted">
                                    日志文件将在客户端发送或接收消息时自动创建
                                </small>
                            </div>
                        `);
                        $('#totalFiles').text('0/0');
                        $('#totalSize').text('0');
                        $('#lastUpdate').text(new Date().toLocaleTimeString());
                    }
                })
                .fail(function(xhr) {
                    $('#logFilesContainer').html(`
                        <div class="text-center py-3">
                            <i class="fas fa-exclamation-triangle fa-2x text-danger mb-2"></i>
                            <div class="text-danger">加载日志文件列表失败</div>
                            <small class="text-muted">${xhr.responseJSON?.message || xhr.statusText}</small>
                        </div>
                    `);
                });
        }

        // 创建日志文件项HTML
        function createLogFileItemHtml(file) {
            const sizeKB = Math.round(file.size / 1024 * 100) / 100;
            const lastModified = new Date(file.lastModified).toLocaleString();
            const isEmpty = file.size === 0;
            const statusClass = isEmpty ? 'text-muted' : 'text-success';
            const statusText = isEmpty ? '空文件' : '有数据';
            
            return `
                <div class="log-file-item">
                    <div class="d-flex justify-content-between align-items-start">
                        <div>
                            <strong>${file.fileName}</strong>
                            <span class="badge badge-${isEmpty ? 'secondary' : 'success'} ml-2">${statusText}</span>
                            <br>
                            <small class="text-muted">
                                类型: ${file.type} | 大小: ${sizeKB} KB | 修改时间: ${lastModified}
                            </small>
                        </div>
                        <div class="log-file-actions">
                            <button class="btn btn-outline-primary btn-sm" onclick="viewLogContent('${file.fileName}')" ${isEmpty ? 'disabled' : ''}>
                                <i class="fas fa-eye"></i> 查看
                            </button>
                            <button class="btn btn-outline-warning btn-sm" onclick="clearLogFile('${file.fileName}')">
                                <i class="fas fa-eraser"></i> 清空
                            </button>
                            <button class="btn btn-outline-danger btn-sm" onclick="deleteLogFile('${file.fileName}')">
                                <i class="fas fa-trash"></i> 删除
                            </button>
                        </div>
                    </div>
                </div>
            `;
        }

        // 查看日志文件内容
        function viewLogContent(fileName) {
            currentLogFileName = fileName;
            $('#logContentModalTitle').text('日志文件内容: ' + fileName);
            $('#logContentModal').modal('show');
            loadLogContent(fileName, $('#logContentLines').val());
        }

        // 加载日志文件内容
        function loadLogContent(fileName, lines) {
            $('#logContentContainer').html('<div class="text-muted">正在加载日志内容...</div>');
            
            $.get(`/api/message/logs/${encodeURIComponent(fileName)}?lines=${lines}`)
                .done(function(response) {
                    if (response.content && response.content.length > 0) {
                        const contentHtml = response.content.map(line => 
                            `<div class="log-line">${escapeHtml(line)}</div>`
                        ).join('');
                        $('#logContentContainer').html(`
                            <div class="alert alert-info">
                                文件: ${response.fileName} | 总行数: ${response.totalLines} | 显示行数: ${response.returnedLines} | 文件大小: ${Math.round(response.fileSize / 1024 * 100) / 100} KB
                            </div>
                            <div class="border rounded p-3" style="max-height: 500px; overflow-y: auto; background-color: #f8f9fa; font-family: monospace; font-size: 12px;">
                                ${contentHtml}
                            </div>
                        `);
                    } else {
                        $('#logContentContainer').html('<div class="text-muted">日志文件为空</div>');
                    }
                })
                .fail(function(xhr) {
                    $('#logContentContainer').html('<div class="text-danger">加载日志内容失败: ' + (xhr.responseJSON?.message || xhr.statusText) + '</div>');
                });
        }

        // 清空日志文件
        function clearLogFile(fileName) {
            if (!confirm(`确定要清空日志文件 "${fileName}" 吗？`)) {
                return;
            }
            
            $.ajax({
                url: '/api/message/logs',
                method: 'DELETE',
                data: { fileName: fileName }
            })
            .done(function(response) {
                alert('日志文件已清空');
                loadLogFiles();
            })
            .fail(function(xhr) {
                alert('清空日志文件失败: ' + (xhr.responseJSON?.message || xhr.statusText));
            });
        }

        // 删除日志文件
        function deleteLogFile(fileName) {
            if (!confirm(`确定要删除日志文件 "${fileName}" 吗？此操作不可恢复！`)) {
                return;
            }
            
            $.ajax({
                url: '/api/message/logs/delete',
                method: 'DELETE',
                data: { fileName: fileName }
            })
            .done(function(response) {
                alert('日志文件已删除');
                loadLogFiles();
            })
            .fail(function(xhr) {
                alert('删除日志文件失败: ' + (xhr.responseJSON?.message || xhr.statusText));
            });
        }

        function initializeEventSource() {
            const source = new EventSource(`/api/message/${encodeURIComponent(address)}/stream`);
            const statusBadge = $('#connection-status');

            source.addEventListener('open', function(e) {
                console.log("SSE connection opened.");
                statusBadge.removeClass('badge-secondary badge-danger').addClass('badge-success').text('已连接');
            });

            source.addEventListener('update', function(e) {
                const data = JSON.parse(e.data);
                const isSent = data.type === 'sent';
                
                const clusterize = isSent ? sentClusterize : receivedClusterize;
                const dataArray = isSent ? sentMessagesData : receivedMessagesData;
                const scrollArea = isSent ? $('#sentScrollArea') : $('#receivedScrollArea');

                // 检查用户是否已滚动到底部
                const isScrolledToBottom = scrollArea[0].scrollHeight - scrollArea.scrollTop() < scrollArea.outerHeight() + 50;

                const newRows = data.messages.map(function(msg, i) {
                    let totalIndex = data.totalCount - data.messages.length + i;
                    return createMessageCardHtml(msg, totalIndex, data.type);
                });
                
                // 使用 append 方法，性能更高
                clusterize.append(newRows);
                dataArray.push(...newRows); // 同步数据到内存数组

                // 限制内存中的数据量
                if (dataArray.length > MAX_MESSAGES_IN_MEMORY) {
                    const toRemoveCount = dataArray.length - MAX_MESSAGES_IN_MEMORY;
                    dataArray.splice(0, toRemoveCount);
                    // Clusterize.js 内部会自动处理DOM，我们只需更新数据数组即可
                    clusterize.update(dataArray);
                }

                // 如果用户之前在底部，则自动滚动到底部
                if (isScrolledToBottom) {
                    scrollArea.scrollTop(scrollArea[0].scrollHeight);
                }

                $(`#${data.type}Count`).text(data.totalCount);
            });
            
            source.addEventListener('error', function(e) {
                statusBadge.removeClass('badge-success').addClass('badge-danger').text('连接断开');
                console.error("SSE connection error/closed.", e);
            });
        }

        function createMessageCardHtml(message, index, type) {
            const timestamp = new Date().toLocaleTimeString();
            const messageType = type === 'sent' ? '发送' : '接收';
            const bgClass = type === 'sent' ? 'border-success' : 'border-info';
            const iconClass = type === 'sent' ? 'fas fa-paper-plane text-success' : 'fas fa-download text-info';

            return `
                <div class="card mb-2 ${bgClass}">
                    <div class="card-header py-2">
                        <small class="text-muted">
                            <i class="${iconClass}"></i> ${messageType} #${index + 1} - ${timestamp}
                        </small>
                        <button class="btn btn-sm btn-outline-secondary float-right py-0" onclick="toggleMessage(this)">
                            <i class="fas fa-chevron-down"></i>
                        </button>
                    </div>
                    <div class="card-body py-2" style="display: none;">
                        <pre><code class="json">${escapeHtml(formatJson(message))}</code></pre>
                    </div>
                </div>
            `;
        }

        function toggleMessage(button) {
            const cardBody = $(button).closest('.card').find('.card-body');
            cardBody.slideToggle('fast', function() {
                // 当内容可见时，才进行语法高亮
                if (cardBody.is(':visible')) {
                    const codeBlock = cardBody.find('pre code');
                    if (codeBlock.length && typeof hljs !== 'undefined' && !codeBlock.hasClass('hljs')) {
                        hljs.highlightElement(codeBlock[0]);
                    }
                }
            });
            $(button).find('i').toggleClass('fa-chevron-down fa-chevron-up');
        }

        function formatJson(jsonString) {
            try {
                const obj = JSON.parse(jsonString);
                return JSON.stringify(obj, null, 2);
            } catch (e) {
                return jsonString;
            }
        }

        function escapeHtml(text) {
            const map = {
                '&': '&amp;',
                '<': '&lt;',
                '>': '&gt;',
                '"': '&quot;',
                "'": '&#039;'
            };
            return text.replace(/[&<>"']/g, function(m) { return map[m]; });
        }
    </script>
}