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

(function() {
'use strict';

async function loadStudents() {
    const res = await apiGet('/api/admin/students', {page_size: 1000});
    if (res && res.success) {
        let html = '';
        res.data.students.forEach(student => {
            html += `<tr>
                <td><input type="checkbox" class="student-checkbox" data-id="${student.student_id}"></td>
                <td>${escapeHtml(student.student_no)}</td>
                <td><a href="/admin/history.php?student_id=${student.student_id}" style="color: #3498db; text-decoration: none;">${escapeHtml(student.name)}</a></td>
                <td>${student.total_points}</td>
                <td><button class="btn btn-sm btn-primary" onclick="showSinglePointsModal(${student.student_id}, '${escapeHtml(student.name)}')">加减分</button></td>
            </tr>`;
        });
        if (res.data.students.length === 0) {
            html = '<tr><td colspan="5" style="text-align:center;">暂无学生数据</td></tr>';
        }
        document.getElementById('studentList').innerHTML = html;
    }
}

function showSinglePointsModal(studentId, studentName) {
    window.selectedStudentIds = [studentId];
    document.getElementById('selectedStudentsCount').innerHTML = `${studentName} (1人)`;
    document.getElementById('pointsChange').value = '';
    document.getElementById('pointsReason').value = '';
    document.getElementById('batchPointsModal').style.display = 'flex';
}

async function exportMoralityRecords() {
    showToast('正在导出德育分记录...', 'info');
    
    try {
        const studentsRes = await apiGet('/api/admin/students', { page_size: 1000 });
        if (!studentsRes || !studentsRes.success) {
            showToast('获取学生列表失败', 'error');
            return;
        }
        
        const students = studentsRes.data.students;
        if (students.length === 0) {
            showToast('没有找到学生', 'warning');
            return;
        }
        
        const historyRes = await apiGet('/api/admin/conduct/history', { page: 1, page_size: 1000 });
        if (!historyRes || !historyRes.success) {
            showToast('获取历史记录失败', 'error');
            return;
        }
        
        const allRecords = historyRes.data.records || [];
        
        const recordsByStudent = {};
        allRecords.forEach(record => {
            const sid = record.student_id;
            if (!recordsByStudent[sid]) {
                recordsByStudent[sid] = [];
            }
            recordsByStudent[sid].push(record);
        });
        
        const studentRecords = [];
        for (const student of students) {
            const studentRecords_list = recordsByStudent[student.student_id] || [];
            const positiveRecords = studentRecords_list.filter(r => r.points_change > 0).map(r => `${r.reason}(+${r.points_change})`);
            const negativeRecords = studentRecords_list.filter(r => r.points_change < 0).map(r => `${r.reason}(${r.points_change})`);
            
            studentRecords.push({
                student_no: student.student_no,
                name: student.name,
                total_points: student.total_points || 0,
                positive_history: positiveRecords.join('; '),
                negative_history: negativeRecords.join('; ')
            });
        }
        
        function escapeCsvField(field) {
            if (field === null || field === undefined) return '';
            let str = String(field).replace(/[\r\n]+/g, ' ');
            str = str.replace(/"/g, '""');
            if (/[\,\;\"\s]/.test(str)) {
                str = '"' + str + '"';
            }
            return str;
        }
        
        let csv = '\uFEFF';
        csv += '学号,姓名,分数,加分历史,减分记录\n';
        studentRecords.forEach(s => {
            csv += `${escapeCsvField(s.student_no)},${escapeCsvField(s.name)},${escapeCsvField(s.total_points)},${escapeCsvField(s.positive_history)},${escapeCsvField(s.negative_history)}\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 = `德育分记录_${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${studentRecords.length}名学生`);
    } catch (err) {
        showToast('导出失败：' + err.message, 'error');
        console.error('导出失败:', err);
    }
}

loadStudents();

window.loadStudents = loadStudents;
window.showSinglePointsModal = showSinglePointsModal;
window.exportMoralityRecords = exportMoralityRecords;

})();