// 全局变量
let cy = null;
let currentTaskId = null;

// 初始化
document.addEventListener('DOMContentLoaded', function() {
    initCytoscape();
    initEventListeners();
    loadTopology();
    loadDeviceList(); // 加载设备列表
});

// 初始化Cytoscape
function initCytoscape() {
    cy = cytoscape({
        container: document.getElementById('cy'),
        elements: [],
        style: [
            {
                selector: 'node',
                style: {
                    'label': 'data(label)',
                    'background-color': function(ele) {
                        return getNodeColor(ele.data('type'));
                    },
                    'width': 70,
                    'height': 70,
                    'border-width': 3,
                    'border-color': '#667eea',
                    'text-valign': 'bottom',
                    'text-halign': 'center',
                    'font-size': '11px',
                    'font-weight': 'bold',
                    'text-wrap': 'wrap',
                    'text-max-width': '80px'
                }
            },
            {
                selector: 'edge',
                style: {
                    'width': 2,
                    'line-color': '#999',
                    'target-arrow-color': '#999',
                    'target-arrow-shape': 'triangle',
                    'curve-style': 'bezier',
                    'label': 'data(protocol)'
                }
            },
            {
                selector: 'node:selected',
                style: {
                    'border-width': 5,
                    'border-color': '#FF9800'
                }
            }
        ],
        layout: {
            name: 'cose',
            animate: true,
            animationDuration: 1000,
            padding: 30
        }
    });

    // 节点点击事件
    cy.on('tap', 'node', function(evt) {
        const node = evt.target;
        showDeviceDetail(node.data('id'));
    });
}

// 获取节点颜色
function getNodeColor(type) {
    const colors = {
        'cisco': '#4CAF50',
        'huawei': '#2196F3',
        'h3c': '#9C27B0',
        'asa': '#FF5722',
        'linux': '#607D8B',
        'windows': '#00BCD4'
    };
    return colors[type] || '#999';
}

// 初始化事件监听
function initEventListeners() {
    // 扫描按钮
    document.getElementById('btn-scan').addEventListener('click', startScan);
    
    // 添加设备按钮
    document.getElementById('btn-add-device').addEventListener('click', function() {
        document.getElementById('modal').classList.add('active');
    });
    
    // 关闭模态框
    document.querySelector('.close').addEventListener('click', function() {
        document.getElementById('modal').classList.remove('active');
    });
    
    // 添加设备表单
    document.getElementById('add-device-form').addEventListener('submit', addDevice);
    
    // 导出按钮
    document.getElementById('btn-export').addEventListener('click', exportTopology);
}

// 开始扫描
async function startScan() {
    const scanRange = document.getElementById('scan-range').value;
    const sshPort = document.getElementById('ssh-port').value;
    const username = document.getElementById('username').value;
    const password = document.getElementById('password').value;

    if (!scanRange) {
        alert('请输入IP范围');
        return;
    }

    try {
        const response = await fetch('/api/scan', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({
                scan_range: scanRange,
                ssh_port: parseInt(sshPort),
                username: username,
                password: password
            })
        });

        const data = await response.json();
        currentTaskId = data.task_id;
        
        // 轮询进度
        pollProgress();
    } catch (error) {
        console.error('扫描失败:', error);
        alert('扫描失败: ' + error.message);
    }
}

// 轮询进度
async function pollProgress() {
    if (!currentTaskId) return;

    const poll = async () => {
        try {
            const response = await fetch(`/api/scan/${currentTaskId}`);
            const task = await response.json();

            // 更新进度
            document.getElementById('scan-status').textContent = task.status;
            document.getElementById('scan-progress').textContent = task.progress + '%';
            document.getElementById('progress-fill').style.width = task.progress + '%';

            // 更新设备列表
            updateDeviceList(task.devices);

            // 如果完成,更新拓扑
            if (task.status === 'completed' || task.status === 'failed') {
                loadTopology();
                loadDeviceList(); // 刷新设备列表
                currentTaskId = null;
                return;
            }

            // 继续轮询
            setTimeout(poll, 1000);
        } catch (error) {
            console.error('获取进度失败:', error);
        }
    };

    poll();
}

// 更新设备列表
function updateDeviceList(devices) {
    const listContainer = document.getElementById('device-list');
    listContainer.innerHTML = '';

    devices.forEach(device => {
        const item = document.createElement('div');
        item.className = 'device-item';
        item.innerHTML = `
            <div class="ip">${device.ip}</div>
            <div class="type">${device.type} - ${device.hostname || 'Unknown'}</div>
            <div class="status status-${device.scan_status.replace(' ', '-')}">${device.scan_status}</div>
        `;
        item.addEventListener('click', () => showDeviceDetail(device.id));
        listContainer.appendChild(item);
    });
}

// 加载拓扑
async function loadTopology() {
    try {
        const response = await fetch('/api/topology');
        const graph = await response.json();

        // 清空现有元素
        cy.elements().remove();

        // 添加节点
        graph.nodes.forEach(node => {
            // 显示格式: 主机名 + IP地址
            let label = node.ip; // 默认显示IP
            if (node.hostname && node.hostname !== '') {
                label = `${node.hostname}\n${node.ip}`;
            }
            
            cy.add({
                group: 'nodes',
                data: {
                    id: node.id,
                    label: label,
                    type: node.type,
                    ip: node.ip,
                    hostname: node.hostname
                }
            });
        });

        // 添加边
        graph.edges.forEach(edge => {
            cy.add({
                group: 'edges',
                data: {
                    id: edge.id,
                    source: edge.source,
                    target: edge.target,
                    protocol: edge.protocol
                }
            });
        });

        // 重新布局
        cy.layout({
            name: 'cose',
            animate: true,
            animationDuration: 1000,
            padding: 30
        }).run();

        cy.fit(40);
    } catch (error) {
        console.error('加载拓扑失败:', error);
    }
}

// 加载设备列表
async function loadDeviceList() {
    try {
        const response = await fetch('/api/devices');
        const devices = await response.json();

        const listContainer = document.getElementById('device-list');
        listContainer.innerHTML = '';

        if (devices.length === 0) {
            listContainer.innerHTML = '<p style="color: #999; text-align: center;">暂无设备</p>';
            return;
        }

        devices.forEach(device => {
            const item = document.createElement('div');
            item.className = 'device-item';
            
            const interfaceCount = device.interfaces ? device.interfaces.length : 0;
            const neighborCount = device.neighbors ? device.neighbors.length : 0;
            
            item.innerHTML = `
                <div class="ip">${device.ip}</div>
                <div class="type">${device.type} - ${device.hostname || 'Unknown'}</div>
                <div class="info" style="font-size: 11px; color: #999; margin-top: 5px;">
                    接口: ${interfaceCount} | 邻居: ${neighborCount}
                </div>
                <div class="status status-${(device.scan_status || 'pending').replace(' ', '-')}">${device.scan_status || 'pending'}</div>
            `;
            item.addEventListener('click', () => showDeviceDetail(device.id || device.ip));
            listContainer.appendChild(item);
        });
    } catch (error) {
        console.error('加载设备列表失败:', error);
    }
}

// 显示设备详情
async function showDeviceDetail(deviceId) {
    try {
        const response = await fetch(`/api/device/${deviceId}`);
        const device = await response.json();

        const detailPanel = document.getElementById('detail-panel');
        const detailContainer = document.getElementById('device-detail');

        detailContainer.innerHTML = `
            <div class="detail-section">
                <h4>基本信息</h4>
                <p><strong>IP:</strong> ${device.ip}</p>
                <p><strong>主机名:</strong> ${device.hostname || 'N/A'}</p>
                <p><strong>类型:</strong> ${device.type}</p>
                <p><strong>系统:</strong> ${device.os_version || 'N/A'}</p>
                <p><strong>运行时间:</strong> ${device.uptime || 'N/A'}</p>
            </div>
            <div class="detail-section">
                <h4>接口信息 (${device.interfaces.length})</h4>
                ${device.interfaces.map(iface => `
                    <div class="interface-item">
                        <div class="name">${iface.name}</div>
                        <div class="info">
                            <p>状态: <span class="status-${iface.status.replace(' ', '-')}">${iface.status}</span></p>
                            <p>IP: ${iface.ip || 'N/A'}</p>
                            <p>MAC: ${iface.mac || 'N/A'}</p>
                            <p>速度: ${iface.speed || 'N/A'}</p>
                        </div>
                    </div>
                `).join('')}
            </div>
            <div class="detail-section">
                <h4>邻居设备 (${device.neighbors.length})</h4>
                ${device.neighbors.map(neighbor => `
                    <div class="interface-item">
                        <div class="name">${neighbor.remote_device}</div>
                        <div class="info">
                            <p>本地接口: ${neighbor.local_interface}</p>
                            <p>远程接口: ${neighbor.remote_interface}</p>
                            <p>协议: ${neighbor.protocol}</p>
                        </div>
                    </div>
                `).join('')}
            </div>
        `;

        detailPanel.classList.add('active');
    } catch (error) {
        console.error('获取设备详情失败:', error);
    }
}

// 添加设备
async function addDevice(event) {
    event.preventDefault();

    const ip = document.getElementById('device-ip').value;
    const type = document.getElementById('device-type').value;
    const username = document.getElementById('device-username').value;
    const password = document.getElementById('device-password').value;

    try {
        const response = await fetch('/api/device', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({
                ip: ip,
                type: type,
                username: username,
                password: password
            })
        });

        if (response.ok) {
            document.getElementById('modal').classList.remove('active');
            document.getElementById('add-device-form').reset();
            loadTopology();
            loadDeviceList(); // 刷新设备列表
            alert('设备添加成功');
        } else {
            const error = await response.json();
            alert('添加失败: ' + error.message);
        }
    } catch (error) {
        console.error('添加设备失败:', error);
        alert('添加失败: ' + error.message);
    }
}

// 导出拓扑
function exportTopology() {
    const json = cy.json();
    const dataStr = JSON.stringify(json, null, 2);
    const dataBlob = new Blob([dataStr], { type: 'application/json' });
    
    const link = document.createElement('a');
    link.href = URL.createObjectURL(dataBlob);
    link.download = 'topology.json';
    link.click();
}