// 首页面板JavaScript

// 页面加载时初始化
document.addEventListener('DOMContentLoaded', function() {
    loadDashboardStats();
    loadRecentRecords();
});

// 加载仪表板统计数据
async function loadDashboardStats() {
    try {
        // 并行加载项目和工时统计
        const [projectsResponse, recentRecordsResponse] = await Promise.all([
            apiGet('/api/projects'),
            loadThisWeekHours()
        ]);
        
        // 更新活跃项目数
        const activeProjects = projectsResponse.data.filter(p => p.is_active).length;
        updateStatValue('total-projects', activeProjects);
        
        // 更新本周工时
        updateStatValue('this-week-hours', recentRecordsResponse.weeklyHours || '0:00');
        
        // 加载本月记录数
        const thisMonthCount = await loadThisMonthRecordsCount();
        updateStatValue('this-month-records', thisMonthCount);
        
    } catch (error) {
        console.error('加载仪表板统计失败:', error);
        // 显示默认值
        updateStatValue('total-projects', '0');
        updateStatValue('this-week-hours', '0:00');
        updateStatValue('this-month-records', '0');
    }
}

// 更新统计值
function updateStatValue(elementId, value) {
    const element = document.getElementById(elementId);
    if (element) {
        element.textContent = value;
    }
}

// 加载本周工时
async function loadThisWeekHours() {
    try {
        const weekRange = getThisWeekRange();
        const url = `/api/timerecords?start_date=${weekRange.start}&end_date=${weekRange.end}`;
        const response = await apiGet(url);
        
        // 计算本周总工时
        let totalHours = 0;
        response.data.forEach(record => {
            if (record.hours && record.hours !== '-') {
                totalHours += hoursToDecimal(record.hours);
            }
        });
        
        return {
            weeklyHours: decimalToHours(totalHours),
            recordCount: response.data.length
        };
    } catch (error) {
        console.error('加载本周工时失败:', error);
        return { weeklyHours: '0:00', recordCount: 0 };
    }
}

// 加载本月记录数
async function loadThisMonthRecordsCount() {
    try {
        const today = new Date();
        const firstDayOfMonth = new Date(today.getFullYear(), today.getMonth(), 1);
        const lastDayOfMonth = new Date(today.getFullYear(), today.getMonth() + 1, 0);
        
        const startDate = firstDayOfMonth.toISOString().split('T')[0];
        const endDate = lastDayOfMonth.toISOString().split('T')[0];
        
        const url = `/api/timerecords?start_date=${startDate}&end_date=${endDate}`;
        const response = await apiGet(url);
        
        return response.data.length;
    } catch (error) {
        console.error('加载本月记录数失败:', error);
        return 0;
    }
}

// 加载最近记录
async function loadRecentRecords() {
    try {
        // 获取最近7天的记录
        const endDate = new Date();
        const startDate = new Date();
        startDate.setDate(endDate.getDate() - 6); // 最近7天
        
        const url = `/api/timerecords?start_date=${startDate.toISOString().split('T')[0]}&end_date=${endDate.toISOString().split('T')[0]}`;
        const response = await apiGet(url);
        
        renderRecentRecords(response.data.slice(0, 5)); // 只显示最近5条
    } catch (error) {
        console.error('加载最近记录失败:', error);
        const container = document.getElementById('recent-records-list');
        if (container) {
            container.innerHTML = '<p class="text-center">加载失败</p>';
        }
    }
}

// 渲染最近记录
function renderRecentRecords(records) {
    const container = document.getElementById('recent-records-list');
    if (!container) return;
    
    if (records.length === 0) {
        container.innerHTML = '<p class="text-center">暂无最近记录</p>';
        return;
    }
    
    container.innerHTML = `
        <div class="recent-records-table">
            <table class="data-table">
                <thead>
                    <tr>
                        <th>日期</th>
                        <th>事件</th>
                        <th>项目</th>
                        <th>工时</th>
                    </tr>
                </thead>
                <tbody>
                    ${records.map(record => {
                        const projectDisplay = record.project 
                            ? (record.project.project_type === 'traditional' 
                                ? `${record.project.customer_name} ${record.project.project_code}`
                                : `${record.project.customer_name} ${record.project.contract_number}`)
                            : '-';
                        
                        const rowClass = getRowClass(record);
                        
                        return `
                            <tr class="${rowClass}">
                                <td>
                                    ${formatDate(record.date)}
                                    ${isToday(record.date) ? '<span class="today-badge">今天</span>' : ''}
                                </td>
                                <td>${escapeHtml(record.event_description || '-')}</td>
                                <td>${escapeHtml(projectDisplay)}</td>
                                <td>${record.hours || '-'}</td>
                            </tr>
                        `;
                    }).join('')}
                </tbody>
            </table>
        </div>
    `;
}

// 获取行的CSS类名（根据是否为休息日）
function getRowClass(record) {
    if (record.is_holiday) {
        if (record.is_working_on_holiday) {
            return 'working-holiday-row'; // 休息日工作
        } else {
            return 'holiday-row'; // 休息日休息
        }
    }
    return '';
}

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

// 添加今天徽章样式
if (!document.querySelector('#today-badge-styles')) {
    const style = document.createElement('style');
    style.id = 'today-badge-styles';
    style.textContent = `
        .today-badge {
            background-color: #3498db;
            color: white;
            padding: 2px 6px;
            border-radius: 3px;
            font-size: 10px;
            font-weight: 600;
            margin-left: 5px;
        }
        
        .recent-records-table {
            overflow-x: auto;
        }
        
        .recent-records-table .data-table {
            margin-bottom: 0;
        }
        
        .recent-records-table .data-table td {
            font-size: 13px;
            padding: 10px 8px;
        }
    `;
    document.head.appendChild(style);
}