async function uploadFile() {
    const fileInput = document.getElementById('fileInput'); // 获取文件输入元素

    // 检查是否选中了文件
    if (fileInput.files.length === 0) {
        alert('请先选择一个文件！');
        return;
    }

    const file = fileInput.files[0]; // 获取第一个文件

    // 检查文件类型
    const allowedTypes = ['application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', 'application/vnd.ms-excel']; // 允许的文件类型
    if (!allowedTypes.includes(file.type)) {
        alert('请上传有效的 Excel 文件！');
        return;
    }

    // 检查文件大小（例如：限制为 5MB）
    const maxSize = 5 * 1024 * 1024; // 5MB
    if (file.size > maxSize) {
        alert('文件大小不能超过 5MB！');
        return;
    }

    const formData = new FormData();
    formData.append('file', file);

    document.getElementById('result').innerText = '上传中...';

    try {
        const response = await fetch('http://10.133.39.58:8000/upload', {
    method: 'POST',
    body: formData
});

        if (!response.ok) {
            throw new Error('文件上传失败。');
        }

        const data = await response.json();
        console.log(data);
        document.getElementById('result').innerText = '上传成功！';
    } catch (error) {
        console.error('错误:', error);
        alert('上传失败: ' + error.message);
    }
}

async function getRandomStudent() {
    const response = await fetch('http://10.133.39.58:8000/random-call');
    const student = await response.json();
    
    document.getElementById('result').innerText = `Selected: ${student.name} (ID: ${student.id}) (points: ${student.points})`;
}

async function createroom() 
{
    const response = await fetch('http://10.133.39.58:8000/random-call');
    const student = await response.json();
    document.getElementById('result').innerText = `Selected: ${student.name} (ID: ${student.id}) (points: ${student.points})`;

}

async function backpoints() 
{
    const response = await fetch('http://10.133.39.58:8000/random-call');
    const student = await response.json();
    document.getElementById('result').innerText = `Selected: ${student.name} (ID: ${student.id}) (points: ${student.points})`;

}