/**
 * 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 relatedType = document.getElementById('historyRelatedType').value;
    const isGrouped = document.getElementById('historyGrouped').checked;
    
    const params = {
        page, page_size: 20,
        start_date: startDate,
        end_date: endDate
    };
    if (studentId) params.student_id = studentId;
    if (relatedType && !isGrouped) params.related_type = relatedType;
    if (isGrouped) params.grouped = true;
    
    const res = await apiGet('/api/admin/conduct/history', params);
    
    if (res && res.success) {
        let headHtml = '';
        if (isGrouped) {
            headHtml = '<th>时间</th><th>原因</th><th>分值</th><th>操作人</th><th>涉及学生</th>';
        } else {
            headHtml = '<th>时间</th><th>学生</th><th>分数变动</th><th>原因</th><th>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 ? record.student_names.split(', ') : [];
                let tagsHtml = '<div class="student-tags-container">';
                names.forEach(name => {
                    tagsHtml += `<span class="student-tag">${escapeHtml(name)}</span>`;
                });
                tagsHtml += '</div>';
                html += `<tr>
                    <td>${formatDateTime(record.created_at)}</td>
                    <td class="preserve-newlines">${escapeHtml(record.reason)}</td>
                    <td class="${pointsClass}">${record.points_change > 0 ? '+' : ''}${record.points_change}×${record.student_count}</td>
                    <td>${escapeHtml(record.recorder_name || '')}</td>
                    <td>${tagsHtml}</td>
                </tr>`;
            });
            if (res.data.records.length === 0) {
                html = '<tr><td colspan="5" style="text-align:center;">暂无记录</td></tr>';
            }
        } else {
            res.data.records.forEach(record => {
                const pointsClass = record.points_change > 0 ? 'plus' : 'minus';
                const revokedStyle = record.is_revoked == 1 ? ' style="opacity:0.5; text-decoration:line-through;"' : '';
                html += `<tr${revokedStyle}>
                    <td>${formatDateTime(record.created_at)}</td>
                    <td>${escapeHtml(record.student_name)}</td>
                    <td class="${pointsClass}">${record.points_change > 0 ? '+' : ''}${record.points_change}</td>
                    <td class="preserve-newlines">${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-secondary" onclick="restoreRecord(${record.record_id})">反撤销</button></td>`;
                    } else {
                        html += `<td><button class="btn btn-sm btn-danger" onclick="revokeRecord(${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-danger" onclick="revokeRecord(${record.record_id})">撤销</button></td>`;
                    }
                } else if (role === '考勤委员') {
                    if (record.is_revoked == 1) {
                        html += `<td><span class="text-muted">已撤销</span></td>`;
                    } else if (record.recorder_id == currentUserId) {
                        html += `<td><button class="btn btn-sm btn-danger" onclick="revokeRecord(${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 relatedType = document.getElementById('historyRelatedType').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 (relatedType) params.related_type = relatedType;
        
        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');
    }
}

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;

})();