/**
 * 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;

function escapeHtml(str) {
    if (!str) return '';
    var el = document.createElement('span');
    el.appendChild(document.createTextNode(str));
    return el.innerHTML;
}

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;
    }
}

// 筛选学生时自动取消合并记录
function onStudentFilterChange() {
    var studentId = document.getElementById('historyStudentId').value;
    if (studentId) {
        var grouped = document.getElementById('historyGrouped');
        if (grouped) grouped.checked = false;
    }
}

// 折叠/展开筛选面板
function toggleFilterPanel() {
    var panel = document.getElementById('advancedFilters');
    var btn = document.getElementById('filterToggleBtn');
    if (panel.style.display === 'none') {
        panel.style.display = 'block';
        btn.textContent = '收起筛选 ▲';
    } else {
        panel.style.display = 'none';
        btn.textContent = '展开筛选 ▼';
    }
}

async function loadHistory(page) {
    page = page || 1;
    currentHistoryPage = page;
    var startDate = document.getElementById('historyStartDate').value;
    var endDate = document.getElementById('historyEndDate').value;
    var studentId = document.getElementById('historyStudentId').value;
    var reasonFilter = document.getElementById('historyReasonFilter').value;
    var isGrouped = document.getElementById('historyGrouped').checked;
    var statusFilter = document.getElementById('historyStatusFilter') ? document.getElementById('historyStatusFilter').value : '';
    
    // 筛选学生时强制取消合并
    if (studentId) isGrouped = false;
    
    var params = {
        page: 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 !== '') params.is_revoked = parseInt(statusFilter);
    
    var res = await apiGet('/api/admin/conduct/history', params);
    
    if (res && res.success) {
        var nowrapStyle = ' style="white-space:nowrap;min-width:80px;"';
        var 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;
        
        var html = '';
        if (isGrouped) {
            res.data.records.forEach(function(record) {
                var pointsClass = record.points_change > 0 ? 'plus' : 'minus';
                var names = record.student_names || '';
                var allRevoked = record.all_revoked;
                var revokedStyle = allRevoked ? ' style="opacity:0.5;text-decoration:line-through;"' : '';
                html += '<tr' + revokedStyle + '>' +
                    '<td class="history-time">' + formatDateTime(record.created_at) + '</td>' +
                    '<td class="history-reason">' + escapeHtml(record.reason) + '</td>' +
                    '<td class="' + pointsClass + '">' + (record.points_change > 0 ? '+' : '') + record.points_change + '&times;' + 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" onclick="batchRevokeGrouped(\'' + escapeHtml(record.reason).replace(/'/g, "\\'") + '\',' + record.points_change + ',\'' + escapeHtml(record.recorder_name || '').replace(/'/g, "\\'") + '\',\'' + formatDateTime(record.created_at) + '\')">批量撤销</button></td>';
                    }
                }
                html += '</tr>';
            });
            if (res.data.records.length === 0) {
                var 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(function(record) {
                var pointsClass = record.points_change > 0 ? 'plus' : 'minus';
                var 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>' + escapeHtml(record.student_name) + '</td>' +
                    '<td class="' + pointsClass + '">' + (record.points_change > 0 ? '+' : '') + record.points_change + '</td>' +
                    '<td class="history-reason">' + escapeHtml(record.reason) + '</td>' +
                    '<td>' + escapeHtml(record.recorder_name) + '</td>';
                if (role === '班主任') {
                    if (record.is_revoked == 1) {
                        var 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) {
                        var 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) {
                var 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() {
    var startDate = document.getElementById('historyStartDate').value;
    var endDate = document.getElementById('historyEndDate').value;
    var studentId = document.getElementById('historyStudentId').value;
    
    showToast('正在导出历史记录...', 'info');
    
    try {
        var reasonFilter = document.getElementById('historyReasonFilter').value;
        var 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;
        
        var res = await apiGet('/api/admin/conduct/history', params);
        if (res && res.success && res.data.records) {
            var records = res.data.records;
            if (records.length === 0) {
                showToast('没有找到记录', 'warning');
                return;
            }
            
            var csv = '\uFEFF';
            csv += '时间,学号,姓名,分数变动,原因,操作人\n';
            records.forEach(function(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';
            });
            
            var blob = new Blob([csv], { type: 'text/csv;charset=utf-8;' });
            var url = URL.createObjectURL(blob);
            var 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 && 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 {
        var 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
        };
        
        var res = await apiGet('/api/admin/conduct/history', params);
        if (!res || !res.success || !res.data.records) {
            showToast('查询记录失败', 'error');
            return;
        }
        
        var matchedIds = [];
        res.data.records.forEach(function(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;
        }
        
        var revokeRes = await apiPost('/api/admin/conduct/batch-revoke', { record_ids: matchedIds });
        if (revokeRes && revokeRes.success) {
            showToast('批量撤销完成: ' + (revokeRes.data ? revokeRes.data.success_count : 0) + '条成功');
            loadHistory(currentHistoryPage);
        } else {
            showToast(revokeRes && revokeRes.message || '批量撤销失败', 'error');
        }
    } catch (err) {
        showToast('批量撤销失败: ' + err.message, 'error');
    }
}

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

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

})();