// dashboard.js - 仪表盘功能实现

// 全局变量
let queryTrendChart = null;
let ratioChart = null;
let intervalId = null;

// 初始化仪表盘
async function initDashboard() {
    try {
        // 加载初始数据
        await loadDashboardData();
        
        // 初始化图表
        initCharts();
        
        // 设置定时更新
        intervalId = setInterval(loadDashboardData, 5000); // 每5秒更新一次
    } catch (error) {
        console.error('初始化仪表盘失败:', error);
        showNotification('初始化失败: ' + error.message, 'error');
    }
}

// 加载仪表盘数据
async function loadDashboardData() {
    try {
        // 并行请求所有数据
        const [stats, topBlockedDomains, recentBlockedDomains, hourlyStats] = await Promise.all([
            api.getStats(),
            api.getTopBlockedDomains(),
            api.getRecentBlockedDomains(),
            api.getHourlyStats()
        ]);
        
        // 更新统计卡片
        updateStatsCards(stats);
        
        // 更新数据表格
        updateTopBlockedTable(topBlockedDomains);
        updateRecentBlockedTable(recentBlockedDomains);
        
        // 更新图表
        updateCharts(stats, hourlyStats);
        
        // 更新运行状态
        updateUptime();
    } catch (error) {
        console.error('加载仪表盘数据失败:', error);
        // 静默失败，不显示通知以免打扰用户
    }
}

// 更新统计卡片
function updateStatsCards(stats) {
    const totalQueries = stats.totalQueries || 0;
    const blockedQueries = stats.blockedQueries || 0;
    const allowedQueries = stats.allowedQueries || 0;
    const errorQueries = stats.errorQueries || 0;
    
    // 更新数量显示
    document.getElementById('total-queries').textContent = formatNumber(totalQueries);
    document.getElementById('blocked-queries').textContent = formatNumber(blockedQueries);
    document.getElementById('allowed-queries').textContent = formatNumber(allowedQueries);
    document.getElementById('error-queries').textContent = formatNumber(errorQueries);
    
    // 更新百分比（模拟数据，实际应该从API获取）
    document.getElementById('queries-percent').textContent = '12%';
    document.getElementById('blocked-percent').textContent = '8%';
    document.getElementById('allowed-percent').textContent = '15%';
    document.getElementById('error-percent').textContent = '2%';
}

// 更新Top屏蔽域名表格
function updateTopBlockedTable(domains) {
    const tableBody = document.getElementById('top-blocked-table');
    
    if (!domains || domains.length === 0) {
        tableBody.innerHTML = `
            <tr>
                <td colspan="2" class="py-4 text-center text-gray-500">暂无数据</td>
            </tr>
        `;
        return;
    }
    
    let html = '';
    for (const domain of domains) {
        html += `
            <tr class="border-b border-gray-200 hover:bg-gray-50">
                <td class="py-3 px-4 text-sm">${domain.name || '未知'}</td>
                <td class="py-3 px-4 text-sm text-right">${formatNumber(domain.count || 0)}</td>
            </tr>
        `;
    }
    
    tableBody.innerHTML = html;
}

// 更新最近屏蔽域名表格
function updateRecentBlockedTable(domains) {
    const tableBody = document.getElementById('recent-blocked-table');
    
    if (!domains || domains.length === 0) {
        tableBody.innerHTML = `
            <tr>
                <td colspan="2" class="py-4 text-center text-gray-500">暂无数据</td>
            </tr>
        `;
        return;
    }
    
    let html = '';
    for (const domain of domains) {
        const time = formatTime(domain.timestamp || Date.now());
        html += `
            <tr class="border-b border-gray-200 hover:bg-gray-50">
                <td class="py-3 px-4 text-sm">${domain.name || '未知'}</td>
                <td class="py-3 px-4 text-sm text-right text-gray-500">${time}</td>
            </tr>
        `;
    }
    
    tableBody.innerHTML = html;
}

// 初始化图表
function initCharts() {
    // 初始化查询趋势图表
    const queryTrendCtx = document.getElementById('query-trend-chart').getContext('2d');
    queryTrendChart = new Chart(queryTrendCtx, {
        type: 'line',
        data: {
            labels: Array.from({length: 24}, (_, i) => `${(i + 1) % 24}:00`),
            datasets: [
                {
                    label: '总查询',
                    data: Array(24).fill(0),
                    borderColor: '#165DFF',
                    backgroundColor: 'rgba(22, 93, 255, 0.1)',
                    tension: 0.4,
                    fill: true
                },
                {
                    label: '屏蔽数量',
                    data: Array(24).fill(0),
                    borderColor: '#F53F3F',
                    backgroundColor: 'rgba(245, 63, 63, 0.1)',
                    tension: 0.4,
                    fill: true
                }
            ]
        },
        options: {
            responsive: true,
            maintainAspectRatio: false,
            plugins: {
                legend: {
                    position: 'top',
                },
                tooltip: {
                    mode: 'index',
                    intersect: false
                }
            },
            scales: {
                y: {
                    beginAtZero: true,
                    grid: {
                        drawBorder: false
                    }
                },
                x: {
                    grid: {
                        display: false
                    }
                }
            }
        }
    });
    
    // 初始化比例图表
    const ratioCtx = document.getElementById('ratio-chart').getContext('2d');
    ratioChart = new Chart(ratioCtx, {
        type: 'doughnut',
        data: {
            labels: ['正常解析', '被屏蔽', '错误'],
            datasets: [{
                data: [70, 25, 5],
                backgroundColor: ['#00B42A', '#F53F3F', '#FF7D00'],
                borderWidth: 0
            }]
        },
        options: {
            responsive: true,
            maintainAspectRatio: false,
            plugins: {
                legend: {
                    position: 'bottom',
                }
            },
            cutout: '70%'
        }
    });
}

// 更新图表数据
function updateCharts(stats, hourlyStats) {
    // 更新比例图表
    if (ratioChart) {
        const total = (stats.totalQueries || 0);
        const blocked = (stats.blockedQueries || 0);
        const allowed = (stats.allowedQueries || 0);
        const error = (stats.errorQueries || 0);
        
        if (total > 0) {
            ratioChart.data.datasets[0].data = [allowed, blocked, error];
            ratioChart.update();
        }
    }
    
    // 更新趋势图表
    if (queryTrendChart && hourlyStats && hourlyStats.length > 0) {
        const labels = hourlyStats.map(h => `${h.hour}:00`);
        const totalData = hourlyStats.map(h => h.total || 0);
        const blockedData = hourlyStats.map(h => h.blocked || 0);
        
        queryTrendChart.data.labels = labels;
        queryTrendChart.data.datasets[0].data = totalData;
        queryTrendChart.data.datasets[1].data = blockedData;
        queryTrendChart.update();
    }
}

// 更新运行状态
function updateUptime() {
    // 这里应该从API获取真实的运行时间
    const uptimeElement = document.getElementById('uptime');
    uptimeElement.textContent = '正常运行中';
    uptimeElement.className = 'mt-1 text-success';
}

// 格式化数字（添加千位分隔符）
function formatNumber(num) {
    return num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');
}

// 格式化时间
function formatTime(timestamp) {
    const date = new Date(timestamp);
    const now = new Date();
    const diff = now - date;
    
    // 如果是今天，显示时间
    if (date.toDateString() === now.toDateString()) {
        return date.toLocaleTimeString('zh-CN', {hour: '2-digit', minute: '2-digit'});
    }
    
    // 否则显示日期和时间
    return date.toLocaleString('zh-CN', {
        month: '2-digit',
        day: '2-digit',
        hour: '2-digit',
        minute: '2-digit'
    });
}

// 显示通知
function showNotification(message, type = 'info') {
    // 移除已存在的通知
    const existingNotification = document.getElementById('notification');
    if (existingNotification) {
        existingNotification.remove();
    }
    
    // 创建通知元素
    const notification = document.createElement('div');
    notification.id = 'notification';
    notification.className = `fixed top-4 right-4 px-6 py-3 rounded-lg shadow-lg z-50 transform transition-all duration-300 translate-y-0 opacity-0`;
    
    // 设置样式和内容
    let bgColor, textColor, icon;
    switch (type) {
        case 'success':
            bgColor = 'bg-success';
            textColor = 'text-white';
            icon = 'fa-check-circle';
            break;
        case 'error':
            bgColor = 'bg-danger';
            textColor = 'text-white';
            icon = 'fa-exclamation-circle';
            break;
        case 'warning':
            bgColor = 'bg-warning';
            textColor = 'text-white';
            icon = 'fa-exclamation-triangle';
            break;
        default:
            bgColor = 'bg-primary';
            textColor = 'text-white';
            icon = 'fa-info-circle';
    }
    
    notification.className += ` ${bgColor} ${textColor}`;
    notification.innerHTML = `
        <div class="flex items-center">
            <i class="fa ${icon} mr-3"></i>
            <span>${message}</span>
        </div>
    `;
    
    // 添加到页面
    document.body.appendChild(notification);
    
    // 显示通知
    setTimeout(() => {
        notification.classList.remove('translate-y-0', 'opacity-0');
        notification.classList.add('-translate-y-2', 'opacity-100');
    }, 10);
    
    // 自动关闭
    setTimeout(() => {
        notification.classList.add('translate-y-0', 'opacity-0');
        setTimeout(() => {
            notification.remove();
        }, 300);
    }, 3000);
}

// 页面切换处理
function handlePageSwitch() {
    const menuItems = document.querySelectorAll('nav a');
    
    menuItems.forEach(item => {
        item.addEventListener('click', (e) => {
            e.preventDefault();
            const targetId = item.getAttribute('href').substring(1);
            
            // 隐藏所有内容
            document.querySelectorAll('[id$="-content"]').forEach(content => {
                content.classList.add('hidden');
            });
            
            // 显示目标内容
            document.getElementById(`${targetId}-content`).classList.remove('hidden');
            
            // 更新页面标题
            document.getElementById('page-title').textContent = item.querySelector('span').textContent;
            
            // 更新活动菜单项
            menuItems.forEach(menuItem => {
                menuItem.classList.remove('sidebar-item-active');
            });
            item.classList.add('sidebar-item-active');
            
            // 侧边栏切换（移动端）
            if (window.innerWidth < 1024) {
                toggleSidebar();
            }
        });
    });
}

// 侧边栏切换
function toggleSidebar() {
    const sidebar = document.getElementById('sidebar');
    sidebar.classList.toggle('-translate-x-full');
}

// 响应式处理
function handleResponsive() {
    const toggleBtn = document.getElementById('toggle-sidebar');
    
    toggleBtn.addEventListener('click', toggleSidebar);
    
    // 初始状态处理
    if (window.innerWidth < 1024) {
        document.getElementById('sidebar').classList.add('-translate-x-full');
    }
    
    // 窗口大小改变时处理
    window.addEventListener('resize', () => {
        const sidebar = document.getElementById('sidebar');
        if (window.innerWidth >= 1024) {
            sidebar.classList.remove('-translate-x-full');
        }
    });
}

// 页面加载完成后初始化
window.addEventListener('DOMContentLoaded', () => {
    // 初始化页面切换
    handlePageSwitch();
    
    // 初始化响应式
    handleResponsive();
    
    // 初始化仪表盘
    initDashboard();
    
    // 页面卸载时清理定时器
    window.addEventListener('beforeunload', () => {
        if (intervalId) {
            clearInterval(intervalId);
        }
    });
});