let historyStartDate = '';
let historyEndDate = '';
let historyStatus = '';
let historyConfigName = '';
let historyPageSize = 10;

// 每页显示条数变化
function onHistoryPageSizeChange() {
    historyPageSize = parseInt(document.getElementById('history-page-size').value) || 10;
    loadHistoryWithDate(1);
}

// 状态筛选变化
function onHistoryStatusChange() {
    historyStatus = document.getElementById('history-status-filter').value;
    loadHistoryWithDate(1);
}

// 统一的批量下载：勾选时下载选中记录，未勾选时按筛选条件下载全部匹配记录
async function batchDownloadHistory() {
    // 同步当前筛选条件
    const configNameInput = document.getElementById('history-config-name');
    if (configNameInput) {
        historyConfigName = configNameInput.value.trim();
    }
    historyStatus = document.getElementById('history-status-filter').value;
    historyStartDate = document.getElementById('history-start-date').value;
    historyEndDate = document.getElementById('history-end-date').value;

    const checkboxes = document.querySelectorAll('.history-checkbox:checked');
    const hasSelection = checkboxes.length > 0;

    if (hasSelection) {
        // 模式1：下载勾选的记录
        const ids = Array.from(checkboxes).map(cb => parseInt(cb.value));
        const failedCount = Array.from(checkboxes).filter(cb => cb.dataset.status !== '1').length;
        const successCount = checkboxes.length - failedCount;

        if (successCount === 0) {
            showToast('选中的记录都是生成失败的，无法下载');
            return;
        }

        if (failedCount > 0) {
            if (!confirm(`选中的 ${checkboxes.length} 条记录中有 ${failedCount} 条是生成失败的，无法下载。\n是否打包下载成功的 ${successCount} 条？`)) {
                return;
            }
        } else {
            if (!confirm(`确定要下载选中的 ${successCount} 条报表吗？`)) {
                return;
            }
        }

        try {
            const response = await fetch('/api/download/batch', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ ids: ids })
            });
            await handleDownloadResponse(response);
        } catch (error) {
            showToast('下载失败: ' + error.message);
        }
    } else {
        // 模式2：按筛选条件下载全部匹配的成功记录
        const filterDescParts = [];
        if (historyConfigName) filterDescParts.push(`配置名称含"${historyConfigName}"`);
        if (historyStartDate) filterDescParts.push(`开始日期 ${historyStartDate}`);
        if (historyEndDate) filterDescParts.push(`结束日期 ${historyEndDate}`);
        const filterDesc = filterDescParts.length > 0 ? filterDescParts.join('，') : '全部记录';

        // 查询匹配数量
        let matchCount = 0;
        let dateRange = '';
        try {
            const countResponse = await fetch('/api/download/batch-filter-count', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({
                    config_name: historyConfigName,
                    start_date: historyStartDate,
                    end_date: historyEndDate
                })
            });
            const countResult = await countResponse.json();
            if (countResult.success) {
                matchCount = countResult.data.total || 0;
                if (countResult.data.min_date && countResult.data.max_date) {
                    dateRange = `\n报表日期范围: ${countResult.data.min_date} 至 ${countResult.data.max_date}`;
                }
            }
        } catch (e) {
            console.error('查询导出数量失败:', e);
        }

        if (matchCount === 0) {
            showToast(`没有符合条件的成功记录可导出。\n筛选条件: ${filterDesc}`);
            return;
        }

        if (!confirm(`未选中任何记录，将按当前筛选条件导出全部匹配的成功记录。\n\n筛选条件: ${filterDesc}\n匹配记录数: ${matchCount} 条${dateRange}\n\n注意: 仅导出生成成功的报表。\n是否继续？`)) {
            return;
        }

        try {
            const response = await fetch('/api/download/batch-filter', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({
                    config_name: historyConfigName,
                    start_date: historyStartDate,
                    end_date: historyEndDate,
                    status: historyStatus
                })
            });
            await handleDownloadResponse(response);
        } catch (error) {
            showToast('下载失败: ' + error.message);
        }
    }
}

// 处理下载响应（两种模式共用）
async function handleDownloadResponse(response) {
    if (!response.ok) {
        try {
            const result = await response.json();
            showToast('下载失败: ' + (result.message || '未知错误'));
        } catch (e) {
            showToast('下载失败: 服务器返回错误');
        }
        return;
    }

    const blob = await response.blob();
    const url = window.URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    const timestamp = new Date().toISOString().slice(0, 19).replace(/[-T:]/g, '');
    a.download = `批量下载_${timestamp}.zip`;
    document.body.appendChild(a);
    a.click();
    document.body.removeChild(a);
    window.URL.revokeObjectURL(url);

    // 显示统计信息（如果有）
    const totalMatched = response.headers.get('X-Total-Matched');
    const filesZipped = response.headers.get('X-Files-Zipped');
    const filesMissing = response.headers.get('X-Files-Missing');
    const skippedFailed = response.headers.get('X-Skipped-Failed');
    if (totalMatched && filesZipped) {
        const missing = filesMissing ? parseInt(filesMissing) : 0;
        const skipped = skippedFailed ? parseInt(skippedFailed) : 0;
        let msg = `下载完成！\n`;
        msg += `匹配记录: ${totalMatched} 条\n`;
        msg += `成功打包: ${filesZipped} 个文件`;
        if (missing > 0) {
            msg += `\n缺失文件: ${filesMissing} 个（历史文件可能已被清理）`;
        }
        if (skipped > 0) {
            msg += `\n跳过失败记录: ${skipped} 个`;
        }
        if (missing > 0 || skipped > 0) {
            showToast(msg);
        }
    }
}

// 按日期查询
function queryHistoryByDate() {
    const startDate = document.getElementById('history-start-date').value;
    const endDate = document.getElementById('history-end-date').value;
    const configNameInput = document.getElementById('history-config-name');
    historyStartDate = startDate;
    historyEndDate = endDate;
    historyConfigName = configNameInput ? configNameInput.value.trim() : '';
    loadHistoryWithDate(1);
}

// 清除筛选
function clearHistoryFilter() {
    document.getElementById('history-status-filter').value = '';
    document.getElementById('history-start-date').value = '';
    document.getElementById('history-end-date').value = '';
    const configNameInput = document.getElementById('history-config-name');
    if (configNameInput) configNameInput.value = '';
    historyStatus = '';
    historyStartDate = '';
    historyEndDate = '';
    historyConfigName = '';
    loadHistory(1);
}

// 带日期参数加载历史记录
// 渲染历史记录列表
function renderHistory(list) {
    const tbody = document.getElementById('history-list');
    if (!list || list.length === 0) {
        tbody.innerHTML = '<tr><td colspan="9" class="empty">暂无历史记录</td></tr>';
        return;
    }
    
    // 解析日期字符串（支持多种格式）
    const parseDate = (dateStr) => {
        if (!dateStr) return null;
        
        // 尝试匹配 "2026-07-12" 格式
        let match = dateStr.match(/(\d{4})-(\d{1,2})-(\d{1,2})/);
        if (match) {
            return {
                year: parseInt(match[1]),
                month: parseInt(match[2]),
                day: parseInt(match[3])
            };
        }
        
        // 尝试匹配 "Sun, 12 Jul 2026 00:00:00 GMT" 格式
        match = dateStr.match(/(\d{1,2})\s+(\w+)\s+(\d{4})/);
        if (match) {
            const months = {
                'Jan': 1, 'Feb': 2, 'Mar': 3, 'Apr': 4, 'May': 5, 'Jun': 6,
                'Jul': 7, 'Aug': 8, 'Sep': 9, 'Oct': 10, 'Nov': 11, 'Dec': 12
            };
            return {
                year: parseInt(match[3]),
                month: months[match[2]] || 1,
                day: parseInt(match[1])
            };
        }
        
        return null;
    };
    
    // 解析时间字符串（支持多种格式）
    const parseTime = (timeStr) => {
        if (!timeStr) return null;
        
        // 尝试匹配 "2026-07-12 08:00:00" 格式
        let match = timeStr.match(/(\d{4})-(\d{1,2})-(\d{1,2})\s+(\d{1,2}):(\d{1,2}):(\d{1,2})/);
        if (match) {
            return {
                year: match[1],
                month: match[2].padStart(2, '0'),
                day: match[3].padStart(2, '0'),
                hour: match[4].padStart(2, '0'),
                minute: match[5].padStart(2, '0'),
                second: match[6].padStart(2, '0')
            };
        }
        
        // 尝试匹配 "Sun, 12 Jul 2026 08:00:00 GMT" 格式
        match = timeStr.match(/(\d{1,2})\s+(\w+)\s+(\d{4})\s+(\d{1,2}):(\d{1,2}):(\d{1,2})/);
        if (match) {
            const months = {
                'Jan': '01', 'Feb': '02', 'Mar': '03', 'Apr': '04', 'May': '05', 'Jun': '06',
                'Jul': '07', 'Aug': '08', 'Sep': '09', 'Oct': '10', 'Nov': '11', 'Dec': '12'
            };
            return {
                year: match[3],
                month: months[match[2]] || '01',
                day: match[1].padStart(2, '0'),
                hour: match[4].padStart(2, '0'),
                minute: match[5].padStart(2, '0'),
                second: match[6].padStart(2, '0')
            };
        }
        
        return null;
    };
    
    tbody.innerHTML = list.map(item => {
        const statusText = item.status === 1 ? '成功' : '失败';
        const statusClass = item.status === 1 ? 'status-success' : 'status-failed';
        
        // 格式化报表日期为中文
        let reportDate = '-';
        const dateObj = parseDate(item.report_date);
        if (dateObj) {
            reportDate = `${dateObj.year}年${dateObj.month}月${dateObj.day}日`;
        } else if (item.report_date) {
            reportDate = item.report_date;
        }
        
        // 格式化时间范围
        let timeRange = '-';
        const startObj = parseTime(item.start_time);
        const endObj = parseTime(item.end_time);
        if (startObj && endObj) {
            const formatTimeObj = (obj) => `${obj.year}-${obj.month}-${obj.day} ${obj.hour}:${obj.minute}:${obj.second}`;
            timeRange = `${formatTimeObj(startObj)} 至 ${formatTimeObj(endObj)}`;
        } else if (item.start_time && item.end_time) {
            timeRange = `${item.start_time} 至 ${item.end_time}`;
        }
        
        const configName = item.config_name || '-';
        const splitValue = item.split_name || '-';
        const totalOrders = item.total_orders || 0;
        const totalDegree = item.total_degree ? parseFloat(item.total_degree).toFixed(3) : '0.000';
        
        return `
            <tr>
                <td><input type="checkbox" class="history-checkbox" value="${item.id}" data-status="${item.status}" data-name="${configName}"></td>
                <td>${reportDate}</td>
                <td>${timeRange}</td>
                <td>${configName}</td>
                <td>${splitValue}</td>
                <td>${totalOrders}</td>
                <td>${totalDegree}</td>
                <td><span class="${statusClass}">${statusText}</span></td>
                <td>
                    ${item.status === 1 && item.file_path ? 
                        `<a href="/api/download?path=${encodeURIComponent(item.file_path)}&token=${encodeURIComponent(getToken())}" class="btn btn-sm btn-success">下载</a>` : 
                        '-'}
                    <button class="btn btn-sm btn-danger" onclick="deleteHistory(${item.id})">删除</button>
                </td>
            </tr>
        `;
    }).join('');
}

// 渲染分页控件
function renderPagination(page, total, pageSize) {
    const container = document.getElementById('history-pagination');
    if (!container) return;
    
    const totalPages = Math.ceil(total / pageSize);
    if (totalPages <= 1) {
        container.innerHTML = '';
        return;
    }
    
    let html = '<div class="pagination">';
    
    // 上一页
    if (page > 1) {
        html += `<button onclick="loadHistoryWithDate(${page - 1})">上一页</button>`;
    }
    
    // 页码（最多显示7个页码）
    let startPage = Math.max(1, page - 3);
    let endPage = Math.min(totalPages, startPage + 6);
    if (endPage - startPage < 6) {
        startPage = Math.max(1, endPage - 6);
    }
    
    if (startPage > 1) {
        html += `<button onclick="loadHistoryWithDate(1)">1</button>`;
        if (startPage > 2) {
            html += `<span style="padding: 0 5px;">...</span>`;
        }
    }
    
    for (let i = startPage; i <= endPage; i++) {
        if (i === page) {
            html += `<button class="active">${i}</button>`;
        } else {
            html += `<button onclick="loadHistoryWithDate(${i})">${i}</button>`;
        }
    }
    
    if (endPage < totalPages) {
        if (endPage < totalPages - 1) {
            html += `<span style="padding: 0 5px;">...</span>`;
        }
        html += `<button onclick="loadHistoryWithDate(${totalPages})">${totalPages}</button>`;
    }
    
    // 下一页
    if (page < totalPages) {
        html += `<button onclick="loadHistoryWithDate(${page + 1})">下一页</button>`;
    }
    
    html += '</div>';
    container.innerHTML = html;
}

// 加载历史记录（无日期筛选）
async function loadHistory(page = 1) {
    loadHistoryWithDate(page);
}

async function loadHistoryWithDate(page) {
    try {
        // 同步配置名称搜索框的值（翻页时保留筛选条件）
        const configNameInput = document.getElementById('history-config-name');
        if (configNameInput) {
            historyConfigName = configNameInput.value.trim();
        }
        let url = `/api/report/history?page=${page}&page_size=${historyPageSize}`;
        if (historyStatus) url += `&status=${historyStatus}`;
        if (historyStartDate) url += `&start_date=${historyStartDate}`;
        if (historyEndDate) url += `&end_date=${historyEndDate}`;
        if (historyConfigName) url += `&config_name=${encodeURIComponent(historyConfigName)}`;
        const response = await fetch(url);
        const result = await response.json();
        if (result.success) {
            renderHistory(result.data.list);
            renderPagination(result.data.page, result.data.total, result.data.page_size);
        } else {
            showToast('加载失败: ' + (result.error || result.message || '未知错误'));
        }
    } catch (error) {
        showToast('加载失败: ' + error.message);
    }
}

// 全选/取消全选历史记录
function toggleSelectAllHistory() {
    const selectAllCheckbox = document.getElementById('select-all-history');
    const checkboxes = document.querySelectorAll('#history-list input[type="checkbox"]');
    checkboxes.forEach(cb => {
        cb.checked = selectAllCheckbox.checked;
    });
}

// 删除单条历史记录
async function deleteHistory(id) {
    if (!confirm('确定要删除这条历史记录吗？对应的报表文件也会被删除。')) {
        return;
    }
    
    try {
        const response = await fetch('/api/report/history/batch-delete', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ ids: [id] })
        });
        const result = await response.json();
        if (result.success) {
            showToast('删除成功');
            loadHistoryWithDate();
        } else {
            showToast('删除失败: ' + result.message);
        }
    } catch (error) {
        showToast('删除失败: ' + error.message);
    }
}

// 批量删除历史记录
async function batchDeleteHistory() {
    const checkboxes = document.querySelectorAll('.history-checkbox:checked');
    if (checkboxes.length === 0) {
        showToast('请至少选择一条记录');
        return;
    }
    
    if (!confirm(`确定要删除选中的 ${checkboxes.length} 条历史记录吗？对应的报表文件也会被删除。`)) {
        return;
    }
    
    const ids = Array.from(checkboxes).map(cb => parseInt(cb.value));
    
    try {
        const response = await fetch('/api/report/history/batch-delete', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ ids: ids })
        });
        const result = await response.json();
        if (result.success) {
            showToast(result.message);
            loadHistoryWithDate();
        } else {
            showToast('删除失败: ' + result.message);
        }
    } catch (error) {
        showToast('删除失败: ' + error.message);
    }
}

// 批量导出当前筛选条件下的所有记录 - 已合并到 batchDownloadHistory 函数
// 该函数已被移除，功能整合到统一的 batchDownloadHistory 中