/**
 * 班级操行分管理系统 - 管理端JS
 * 
 * 开发者: Canglan
 * 联系方式: admin@sea-studio.top
 * 版权归属: Sea Network Technology Studio
 * 许可证: MIT License
 * 
 * 版权所有 © Sea Network Technology Studio
 */

// 全局变量（使用 var 避免与页面级 let 重复声明冲突）
var selectedStudentIds = [];
var currentPage = 1;
var totalPages = 1;
var currentHistoryPage = 1;

// 显示批量加减分模态框
function showBatchPointsModal() {
    selectedStudentIds = [];
    document.querySelectorAll('.student-checkbox:checked').forEach(cb => {
        selectedStudentIds.push(parseInt(cb.dataset.id));
    });
    
    if (selectedStudentIds.length === 0) {
        showToast('请先选择学生', 'warning');
        return;
    }
    
    document.getElementById('selectedStudentsCount').innerHTML = `${selectedStudentIds.length} 人`;
    document.getElementById('pointsChange').value = '';
    document.getElementById('pointsReason').value = '';
    document.getElementById('batchPointsModal').style.display = 'flex';
}

// 提交批量加减分
async function submitBatchPoints() {
    const pointsChange = parseInt(document.getElementById('pointsChange').value);
    const reason = document.getElementById('pointsReason').value;
    
    if (isNaN(pointsChange) || pointsChange === 0) {
        showToast('分值不能为0', 'error');
        return;
    }
    
    if (!reason.trim()) {
        showToast('请填写原因', 'error');
        return;
    }
    
    const res = await apiPost('/api/admin/conduct/add', {
        student_ids: selectedStudentIds,
        points_change: pointsChange,
        reason: reason
    });
    
    if (res && res.success) {
        showToast(`操作成功: ${res.data.success_count} 人成功`);
        closeModal('batchPointsModal');
        loadStudents();
        if (typeof loadConductStudents === 'function') loadConductStudents();
    } else {
        showToast(res?.message || '操作失败', 'error');
    }
}

// 显示导入模态框
function showImportModal() {
    document.getElementById('importModal').style.display = 'flex';
    document.getElementById('importPreview').style.display = 'none';
    document.getElementById('importPreview').innerHTML = '';
    document.getElementById('importBtn').style.display = 'none';
    document.getElementById('importFile').value = '';
}

// 预览导入文件
function previewImportFile() {
    const file = document.getElementById('importFile').files[0];
    if (!file) return;
    
    const reader = new FileReader();
    reader.onload = function(e) {
        try {
            const data = JSON.parse(e.target.result);
            const students = data.students || [];
            
            let html = '<h4>预览数据</h4><div class="table-wrapper"><table><thead><tr>';
            html += '<th>学号</th><th>姓名</th><th>家长手机号</th><th>初始密码</th>';
            html += '</tr></thead><tbody>';
            
            students.forEach(s => {
                html += `<tr>
                    <td>${escapeHtml(s.student_no || '')}</td>
                    <td>${escapeHtml(s.name || '')}</td>
                    <td>${escapeHtml(s.parent_phone || '')}</td>
                    <td>${escapeHtml(s.password || '123456')}</td>
                </tr>`;
            });
            
            html += `</tbody></table></div><p>共 ${students.length} 条记录，初始操行分默认为60分</p>`;
            document.getElementById('importPreview').innerHTML = html;
            document.getElementById('importPreview').style.display = 'block';
            document.getElementById('importBtn').style.display = 'inline-block';
        } catch (error) {
            showToast('JSON格式错误', 'error');
        }
    };
    reader.readAsText(file);
}

// 执行导入
async function doImport() {
    const file = document.getElementById('importFile').files[0];
    if (!file) {
        showToast('请选择文件', 'warning');
        return;
    }
    
    const formData = new FormData();
    formData.append('file', file);
    
    const token = getToken();
    const response = await fetch(`${API_BASE_URL}/api/admin/students/import`, {
        method: 'POST',
        headers: {
            'Authorization': `Bearer ${token}`
        },
        body: formData
    });
    
    const result = await response.json();
    
    if (result.success) {
        showToast(result.message);
        closeModal('importModal');
        loadStudents();
        
        // 显示详细导入结果
        if (result.data && result.data.results) {
            const failedList = result.data.results.filter(r => !r.success);
            if (failedList.length > 0) {
                let detail = '失败详情：\n';
                failedList.forEach(r => {
                    detail += `${r.student_no || '未知'}: ${r.error}\n`;
                });
                alert(detail);
            }
        }
    } else {
        showToast(result.message, 'error');
    }
}

// 显示新增学生模态框
function showAddStudentModal() {
    document.getElementById('addStudentModal').style.display = 'flex';
    document.getElementById('addStudentForm').reset();
}

// 提交新增学生
async function submitAddStudent() {
    const studentNo = document.getElementById('studentNo').value.trim();
    const name = document.getElementById('studentName').value.trim();
    const parentPhone = document.getElementById('parentPhone').value.trim();
    
    if (!studentNo || !name) {
        showToast('请填写学号和姓名', 'warning');
        return;
    }
    
    const res = await apiPost('/api/admin/students', {
        student_no: studentNo,
        name: name,
        parent_phone: parentPhone
    });
    
    if (res && res.success) {
        showToast('学生添加成功');
        closeModal('addStudentModal');
        loadStudents();
    } else {
        showToast(res?.message || '添加失败', 'error');
    }
}

// 显示添加管理员模态框
function showAddAdminModal() {
    document.getElementById('addAdminModal').style.display = 'flex';
    document.getElementById('addAdminForm')?.reset();
}

// 提交添加管理员
async function submitAddAdmin() {
    const username = document.getElementById('adminUsername').value.trim();
    const realName = document.getElementById('adminRealName').value.trim();
    const password = document.getElementById('adminPassword').value;
    const roleType = document.getElementById('adminRole').value;
    
    if (!username || !realName || !roleType) {
        showToast('请填写完整信息', 'warning');
        return;
    }
    
    const res = await apiPost('/api/admin/add', {
        username: username,
        real_name: realName,
        password: password || undefined,
        role_type: roleType
    });
    
    if (res && res.success) {
        let msg = `管理员 ${res.data.username} 添加成功`;
        if (res.data.password) msg += `，密码: ${res.data.password}`;
        showToast(msg);
        closeModal('addAdminModal');
        loadAdmins();
    } else {
        showToast(res?.message || '添加失败', 'error');
    }
}

// 显示添加科目模态框
function showAddSubjectModal() {
    document.getElementById('addSubjectModal').style.display = 'flex';
    document.getElementById('addSubjectForm').reset();
}

// 提交添加科目
async function submitAddSubject() {
    const subjectName = document.getElementById('subjectName').value.trim();
    const subjectCode = document.getElementById('subjectCode').value.trim();
    
    if (!subjectName) {
        showToast('请填写科目名称', 'warning');
        return;
    }
    
    const res = await apiPost('/api/subject/create', {
        subject_name: subjectName,
        subject_code: subjectCode
    });
    
    if (res && res.success) {
        showToast('科目添加成功');
        closeModal('addSubjectModal');
        loadSubjects();
    } else {
        showToast(res?.message || '添加失败', 'error');
    }
}

// 撤销扣分记录
async function revokeRecord(recordId) {
    if (!confirm('确定要撤销这条记录吗？撤销后学生分数将恢复。')) return;
    
    const res = await apiPost('/api/admin/conduct/revoke', { record_id: recordId });
    if (res && res.success) {
        showToast('撤销成功');
        loadHistory(currentHistoryPage);
    } else {
        showToast(res?.message || '撤销失败', 'error');
    }
}

// 反撤销（恢复）记录
async function restoreRecord(recordId) {
    if (!confirm('确定要反撤销这条记录吗？分数变动将重新生效。')) return;
    
    const res = await apiPost('/api/admin/conduct/restore', { record_id: recordId });
    if (res && res.success) {
        showToast('反撤销成功');
        loadHistory(currentHistoryPage);
    } else {
        showToast(res?.message || '反撤销失败', 'error');
    }
}

// 关闭模态框
function closeModal(modalId) {
    const modal = document.getElementById(modalId);
    if (modal) {
        modal.style.display = 'none';
    }
}

// HTML转义
function escapeHtml(str) {
    if (!str) return '';
    return str.replace(/[&<>]/g, function(m) {
        if (m === '&') return '&amp;';
        if (m === '<') return '&lt;';
        if (m === '>') return '&gt;';
        return m;
    });
}

// 全选功能
function toggleSelectAll() {
    const selectAll = document.getElementById('selectAll');
    if (selectAll) {
        document.querySelectorAll('.student-checkbox').forEach(cb => {
            cb.checked = selectAll.checked;
        });
    }
}

// 绑定文件选择事件
document.addEventListener('DOMContentLoaded', () => {
    const fileInput = document.getElementById('importFile');
    if (fileInput) {
        fileInput.addEventListener('change', previewImportFile);
    }
});

// ===== 学生编辑/删除/重置密码 =====

function showEditStudentModal(studentId, studentNo, name, phone) {
    document.getElementById('editStudentId').value = studentId;
    document.getElementById('editStudentNo').value = studentNo;
    document.getElementById('editStudentName').value = name;
    document.getElementById('editStudentPhone').value = phone || '';
    document.getElementById('editStudentModal').style.display = 'flex';
}

async function submitEditStudent() {
    const studentId = document.getElementById('editStudentId').value;
    const name = document.getElementById('editStudentName').value.trim();
    const phone = document.getElementById('editStudentPhone').value.trim();
    
    if (!name) {
        showToast('请输入姓名', 'warning');
        return;
    }
    
    const res = await apiPut(`/api/admin/students/${studentId}`, {
        name: name,
        parent_phone: phone || null
    });
    
    if (res && res.success) {
        showToast('学生信息更新成功');
        closeModal('editStudentModal');
        location.reload();
    } else {
        showToast(res?.message || '更新失败', 'error');
    }
}

function showResetStudentPasswordModal(studentId, name) {
    document.getElementById('resetStudentId').value = studentId;
    document.getElementById('resetStudentInfo').textContent = `正在重置学生 "${name}" 的密码`;
    document.getElementById('newStudentPassword').value = '';
    document.getElementById('resetStudentPasswordModal').style.display = 'flex';
}

async function submitResetStudentPassword() {
    const studentId = document.getElementById('resetStudentId').value;
    const newPassword = document.getElementById('newStudentPassword').value;
    
    if (!newPassword || newPassword.length < 6) {
        showToast('密码至少6位', 'warning');
        return;
    }
    
    const res = await apiPost(`/api/admin/students/reset-password/${studentId}`, {
        new_password: newPassword
    });
    
    if (res && res.success) {
        showToast('密码重置成功');
        closeModal('resetStudentPasswordModal');
    } else {
        showToast(res?.message || '重置失败', 'error');
    }
}

async function deleteStudent(studentId, name) {
    if (!confirm(`确定要删除学生 "${name}" 吗？删除后学生账号将被禁用。`)) return;
    
    const res = await apiDelete(`/api/admin/students/${studentId}`);
    
    if (res && res.success) {
        showToast('学生删除成功');
        location.reload();
    } else {
        showToast(res?.message || '删除失败', 'error');
    }
}