togglePreview = function (mode) {
    const previewBtn = document.getElementById('preview-toggle');
    const sourceBtn = document.getElementById('source-toggle');
    const reportContent = document.getElementById('report-content');
    const markdownSource = document.getElementById('markdown-source');
    const sourceContent = document.getElementById('source-content');

    if (mode === 'preview') {
        previewBtn.classList.add('active');
        sourceBtn.classList.remove('active');
        reportContent.style.display = 'block';
        markdownSource.style.display = 'none';
    } else {
        previewBtn.classList.remove('active');
        sourceBtn.classList.add('active');
        reportContent.style.display = 'none';
        markdownSource.style.display = 'block';

        // 显示原始Markdown源代码
        const markdown = reportContent.getAttribute('data-markdown');
        sourceContent.textContent = markdown;
    }
};

// 设置默认周次为当前周
function getCurrentWeek() {
    const now = new Date();
    const startOfYear = new Date(now.getFullYear(), 0, 1);
    const days = Math.floor((now - startOfYear) / (24 * 60 * 60 * 1000));
    const weekNumber = Math.ceil((days + 1) / 7);
    return `${now.getFullYear()}-W${weekNumber.toString().padStart(2, '0')}`;
}

// 页面加载时设置默认周次
document.addEventListener('DOMContentLoaded', function () {
    document.getElementById('week').value = getCurrentWeek();
});

function showLoading() {
    document.getElementById('loading').style.display = 'block';
    document.getElementById('report-container').style.display = 'none';
    document.getElementById('error').style.display = 'none';
}

function hideLoading() {
    document.getElementById('loading').style.display = 'none';
}

function showError(message) {
    document.getElementById('error').style.display = 'block';
    document.getElementById('error').textContent = message;
}

function generateCurrentWeekReport() {
    document.getElementById('week').value = getCurrentWeek();
    generateReport();
}


function generateReport() {
    const week = document.getElementById('week').value;
    if (!week) {
        showError('请选择周次');
        return;
    }

    // 转换格式：YYYY-WWW 到 YYYY-WW
    const weekFormatted = week.replace('W', '');

    showLoading();

    fetch(`api/reports/weekly?week=${weekFormatted}`)
        .then(response => response.json())
        .then(data => {
            hideLoading();

            if (data.success) {
                // 保存原始Markdown内容到data属性
                document.getElementById('report-content').setAttribute('data-markdown', data.report);

                // 使用专业的Markdown解析器将Markdown转换为HTML并显示
                const htmlContent = parseMarkdownWithTables(data.report);
                document.getElementById('report-content').innerHTML = htmlContent;

                // 重置为预览模式
                togglePreview('preview');

                document.getElementById('report-container').style.display = 'block';

                // 显示统计数据
                if (data.statistics) {
                    displayStatistics(data.statistics);
                    document.getElementById('statistics').style.display = 'block';

                    // 显示分类图表
                    if (data.statistics.category_breakdown) {
                        displayCategoryChart(data.statistics.category_breakdown);
                        document.getElementById('category-chart').style.display = 'block';
                    }
                }
            } else {
                showError('生成周报失败：' + data.error);
            }
        })
        .catch(error => {
            hideLoading();
            showError('网络错误：' + error.message);
        });
}

function displayStatistics(stats) {
    const statGrid = document.getElementById('stat-grid');
    statGrid.innerHTML = '';

    const statistics = [
        {label: '本周消息量', value: stats.week_message_count, unit: '条'},
        {label: '上周消息量', value: stats.last_week_message_count, unit: '条'},
        {label: '消息变化率', value: stats.message_change_rate.toFixed(1), unit: '%'},
        {label: '本周活跃用户', value: stats.week_active_users, unit: '人'},
        {label: '群组数量', value: stats.group_count, unit: '个'},
        {label: '成员总数', value: stats.member_count, unit: '人'},
        {label: '问答记录数', value: stats.qa_count, unit: '条'}
    ];

    statistics.forEach(stat => {
        const statItem = document.createElement('div');
        statItem.className = 'stat-item';
        statItem.innerHTML = `
            <div class="stat-value">${stat.value}${stat.unit}</div>
            <div class="stat-label">${stat.label}</div>
        `;
        statGrid.appendChild(statItem);
    });
}

function displayCategoryChart(categories) {
    const categoryItems = document.getElementById('category-items');
    categoryItems.innerHTML = '';

    Object.entries(categories).forEach(([category, percentage]) => {
        const categoryItem = document.createElement('div');
        categoryItem.className = 'category-item';
        categoryItem.innerHTML = `
            <span style="min-width: 120px;">${category}</span>
            <div class="category-bar" style="width: ${percentage * 2}px;"></div>
            <span style="min-width: 40px; text-align: right;">${percentage}%</span>
        `;
        categoryItems.appendChild(categoryItem);
    });
}

function exportReport() {
    const reportContent = document.getElementById('report-content').getAttribute('data-markdown');
    if (!reportContent) {
        showError('请先生成周报');
        return;
    }

    const blob = new Blob([reportContent], {type: 'text/markdown'});
    const url = URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    a.download = `运营周报_${document.getElementById('week').value}.md`;
    document.body.appendChild(a);
    a.click();
    document.body.removeChild(a);
    URL.revokeObjectURL(url);
}

// 页面加载时自动生成本周周报
window.addEventListener('load', function () {
    generateCurrentWeekReport();
});

// 支持回车键生成报告
document.getElementById('week').addEventListener('keypress', function (e) {
    if (e.key === 'Enter') {
        generateReport();
    }
});

// 使用专业的Markdown解析器解析Markdown文本，支持表格
function parseMarkdownWithTables(markdown) {
    if (typeof MarkdownParser !== 'undefined' && typeof MergeTableParser !== 'undefined') {
        const parser = new MarkdownParser();
        return parser.parseFull(markdown);
    } else {
        // 回退到简单的markdown渲染
        return markdownToHtml(markdown);
    }
}