/**
 * 班级操行分管理系统 - 历史记录页JS
 * 
 * 开发者: Canglan
 * 版权归属: Sea Network Technology Studio
 * 
 * 版权所有 © Sea Network Technology Studio
 */

(function() {
'use strict';

const role = window.PAGE_CONFIG.role;
const currentUserId = window.PAGE_CONFIG.userId;
let currentHistoryPage = 1;
let totalHistoryPages = 1;

async function loadStudentsForSelect() {
    const res = await apiGet('/api/admin/students', {page_size: 1000});
    if (res && res.success) {
        let html = '<option value="">全部</option>';
        res.data.students.forEach(s => {
            html += `<option value="${s.student_id}">${escapeHtml(s.student_no)} - ${escapeHtml(s.name)}</option>`;
        });
        document.getElementById('historyStudentId').innerHTML = html;
    }
}

async function loadHistory(page = 1) {
    currentHistoryPage = page;
    const startDate = document.getElementById('historyStartDate').value;
    const endDate = document.getElementById('historyEndDate').value;
    const studentId = document.getElementById('historyStudentId').value;
    const reasonFilter = document.getElementById('historyReasonFilter').value;
    const isGrouped = document.getElementById('historyGrouped').checked;
    const statusFilter = document.getElementById('historyStatusFilter')?.value;
    
    const params = {
        page, page_size: 20,
        start_date: startDate,
        end_date: endDate
    };
    if (studentId) params.student_id = studentId;
    if (reasonFilter) params.reason_prefix = reasonFilter;
    if (isGrouped) params.grouped = true;
    if (statusFilter !== undefined && statusFilter !== '') params.is_revoked = parseInt(statusFilter);
    
    const res = await apiGet('/api/admin/conduct/history', params);
    
    if (res && res.success) {
        const nowrapStyle = ' style="white-space: nowrap; min-width: 80px;"';
        let headHtml = '';
        if (isGrouped) {
            headHtml = '<th>时间</th><th>原因</th><th>分值</th><th' + nowrapStyle + '>操作人</th><th>涉及学生</th>';
            if (role === '班主任' || role === '班长') {
                headHtml += '<th>操作</th>';
            }
        } else {
            headHtml = '<th>时间</th><th>学生</th><th>分数变动</th><th>原因</th><th' + nowrapStyle + '>操作人</th>';
            if (role === '班主任' || role === '班长' || role === '考勤委员') {
                headHtml += '<th>操作</th>';
            }
        }
        document.getElementById('historyTableHead').innerHTML = headHtml;
        
        let html = '';
        if (isGrouped) {
            res.data.records.forEach(record => {
                const pointsClass = record.points_change > 0 ? 'plus' : 'minus';
                const names = record.student_names || '';
                const allRevoked = record.all_revoked;
                const revokedStyle = allRevoked ? ' style="opacity:0.5; text-decoration:line-through;"' : '';
                html += `<tr${revokedStyle}>
                    <td class="history-time">${formatDateTime(record.created_at)}</td>
                    <td class="preserve-newlines history-reason">${escapeHtml(record.reason)}</td>
                    <td class="${pointsClass}">${record.points_change > 0 ? '+' : ''}${record.points_change}×${record.student_count}</td>
                    <td>${escapeHtml(record.recorder_name || '')}</td>
                    <td class="history-students">${escapeHtml(names)}</td>`;
                if (role === '班主任' || role === '班长') {
                    if (allRevoked) {
                        html += `<td><span class="text-muted">已撤销</span></td>`;
                    } else {
                        html += `<td><button class="btn btn-sm btn-outline-danger" onclick="batchRevokeGrouped('${escapeHtml(record.reason)}', ${record.points_change}, '${escapeHtml(record.recorder_name || '')}', '${formatDateTime(record.created_at)}')">批量撤销</button></td>`;
                    }
                }
                html += `</tr>`;
            });
            if (res.data.records.length === 0) {
                const colSpan = (role === '班主任' || role === '班长') ? 6 : 5;
                html = '<tr><td colspan="' + colSpan + '" style="text-align:center;">暂无记录</td></tr>';
            }
        } else {
            res.data.records.forEach(record => {
                const pointsClass = record.points_change > 0 ? 'plus' : 'minus';
                const revokedStyle = record.is_revoked == 1 ? ' style="opacity:0.5; text-decoration:line-through;"' : '';
                html += `<tr${revokedStyle}>
                    <td class="history-time">${formatDateTime(record.created_at)}</td>
                    <td class="history-students">${escapeHtml(record.student_name)}</td>
                    <td class="${pointsClass}">${record.points_change > 0 ? '+' : ''}${record.points_change}</td>
                    <td class="preserve-newlines history-reason">${escapeHtml(record.reason)}</td>
                    <td>${escapeHtml(record.recorder_name)}</td>`;
                if (role === '班主任') {
                    if (record.is_revoked == 1) {
                        const revokerInfo = record.revoker_name ? `由 ${escapeHtml(record.revoker_name)} 撤销` : '已撤销';
                        html += `<td><span class="text-muted" style="margin-right:4px;">${revokerInfo}</span><button class="btn btn-sm btn-outline" onclick="restoreRecord(${record.record_id})">反撤销</button></td>`;
                    } else {
                        html += `<td><button class="btn btn-sm btn-outline" onclick="revokeRecord(${record.record_id})">撤销</button></td>`;
                    }
                } else if (role === '班长') {
                    if (record.is_revoked == 1) {
                        const revokerInfo = record.revoker_name ? `由 ${escapeHtml(record.revoker_name)} 撤销` : '已撤销';
                        html += `<td><span class="text-muted">${revokerInfo}</span></td>`;
                    } else {
                        html += `<td><button class="btn btn-sm btn-outline" onclick="revokeRecord(${record.record_id})">撤销</button></td>`;
                    }
                } else if (role === '考勤委员') {
                    if (record.is_revoked == 1) {
                        html += `<td><span class="text-muted">已撤销</span></td>`;
                    } else if (record.recorder_id == currentUserId) {
                        html += `<td><button class="btn btn-sm btn-outline" onclick="revokeRecord(${record.record_id})">撤销</button></td>`;
                    } else {
                        html += `<td><span class="text-muted">-</span></td>`;
                    }
                }
                html += `</tr>`;
            });
            
            if (res.data.records.length === 0) {
                const colSpan = (role === '班主任' || role === '班长' || role === '考勤委员') ? 6 : 5;
                html = `<tr><td colspan="${colSpan}" style="text-align:center;">暂无记录</td></tr>`;
            }
        }
        
        document.getElementById('historyList').innerHTML = html;
        
        totalHistoryPages = res.data.total_pages || 1;
        renderHistoryPagination();
    }
}

function renderHistoryPagination() {
    renderSmartPagination('historyPagination', currentHistoryPage, totalHistoryPages, function(page) {
        loadHistory(page);
    });
}

async function exportHistoryRecords() {
    const startDate = document.getElementById('historyStartDate').value;
    const endDate = document.getElementById('historyEndDate').value;
    const studentId = document.getElementById('historyStudentId').value;
    
    showToast('正在导出历史记录...', 'info');
    
    try {
        const reasonFilter = document.getElementById('historyReasonFilter').value;
        const params = { page: 1, page_size: 1000 };
        if (startDate) params.start_date = startDate;
        if (endDate) params.end_date = endDate;
        if (studentId) params.student_id = studentId;
        if (reasonFilter) params.reason_prefix = reasonFilter;
        
        const res = await apiGet('/api/admin/conduct/history', params);
        if (res && res.success && res.data.records) {
            const records = res.data.records;
            if (records.length === 0) {
                showToast('没有找到记录', 'warning');
                return;
            }
            
            let csv = '\uFEFF';
            csv += '时间,学号,姓名,分数变动,原因,操作人\n';
            records.forEach(r => {
                csv += `${r.created_at || ''},${r.student_no || ''},${r.student_name || ''},${r.points_change > 0 ? '+' : ''}${r.points_change},${(r.reason || '').replace(/,/g, ';')},${r.recorder_name || ''}\n`;
            });
            
            const blob = new Blob([csv], { type: 'text/csv;charset=utf-8;' });
            const url = URL.createObjectURL(blob);
            const link = document.createElement('a');
            link.href = url;
            link.download = `历史记录_${new Date().toISOString().slice(0,10)}.csv`;
            document.body.appendChild(link);
            link.click();
            document.body.removeChild(link);
            URL.revokeObjectURL(url);
            
            showToast(`导出成功，共${records.length}条记录`);
        } else {
            showToast('导出失败：' + (res?.message || '未知错误'), 'error');
        }
    } catch (err) {
        showToast('导出失败：' + err.message, 'error');
    }
}

// 批量撤销合并记录（按条件查找并撤销）
async function batchRevokeGrouped(reason, pointsChange, recorderName, createdAt) {
    if (!confirm(`确定要撤销所有"${reason}"(${pointsChange > 0 ? '+' : ''}${pointsChange}分)的记录吗？`)) return;
    
    showToast('正在批量撤销...', 'info');
    
    try {
        // 先查询匹配的记录
        const params = {
            page: 1, page_size: 1000,
            start_date: document.getElementById('historyStartDate').value,
            end_date: document.getElementById('historyEndDate').value,
            reason_prefix: reason.substring(0, 4),
            grouped: false
        };
        
        const res = await apiGet('/api/admin/conduct/history', params);
        if (!res || !res.success || !res.data.records) {
            showToast('查询记录失败', 'error');
            return;
        }
        
        // 精确匹配
        const matchedIds = [];
        res.data.records.forEach(r => {
            if (r.reason === reason && r.points_change === pointsChange && r.is_revoked == 0) {
                matchedIds.push(r.record_id);
            }
        });
        
        if (matchedIds.length === 0) {
            showToast('没有找到可撤销的记录', 'warning');
            return;
        }
        
        const revokeRes = await apiPost('/api/admin/conduct/batch-revoke', { record_ids: matchedIds });
        if (revokeRes && revokeRes.success) {
            showToast(`批量撤销完成: ${revokeRes.data.success_count}条成功`);
            loadHistory(currentHistoryPage);
        } else {
            showToast(revokeRes?.message || '批量撤销失败', 'error');
        }
    } catch (err) {
        showToast('批量撤销失败: ' + err.message, 'error');
    }
}

loadStudentsForSelect().then(() => {
    const urlParams = new URLSearchParams(window.location.search);
    const preStudentId = urlParams.get('student_id');
    if (preStudentId) {
        document.getElementById('historyStudentId').value = preStudentId;
        loadHistory();
    } else {
        loadHistory();
    }
});

window.loadHistory = loadHistory;
window.loadStudentsForSelect = loadStudentsForSelect;
window.exportHistoryRecords = exportHistoryRecords;
window.batchRevokeGrouped = batchRevokeGrouped;

})();