document.addEventListener('DOMContentLoaded', function () {
    let students = [];
    let intervalId;
    let isRunning = false;
    let audio = new Audio('path/to/your/music.mp3'); // 自定义音乐文件路径

    // 读取Excel文件
    document.getElementById('file-upload').addEventListener('change', function (e) {
        const file = e.target.files[0];
        const reader = new FileReader();
        reader.onload = function (event) {
            const data = new Uint8Array(event.target.result);
            const workbook = XLSX.read(data, { type: 'array' });
            const sheetName = workbook.SheetNames[0];
            const worksheet = workbook.Sheets[sheetName];
            const json = XLSX.utils.sheet_to_json(worksheet);
            students = json.map(row => ({
                name: row['姓名'],
                points: row['积分'] ? parseFloat(row['积分']) : 0
            }));
            document.querySelector('.upload-button').innerText = file.name; // 显示文件名在按钮上
        };
        reader.readAsArrayBuffer(file);
    });

    // 随机点名
    function startRandomName() {
        if (students.length === 0) return;
        isRunning = true;
        intervalId = setInterval(() => {
            const selectedStudent = weightedRandomSelection();
            document.getElementById('nameDisplay').innerText = selectedStudent.name;
        }, 100);
        audio.play(); // 开始播放音乐
    }

    function stopRandomName() {
        clearInterval(intervalId);
        isRunning = false;
        const selectedName = document.getElementById('nameDisplay').innerText;
        const selectedStudent = students.find(student => student.name === selectedName);
        if (selectedStudent) {
            handleStudentAttendance(selectedStudent);
        }
        audio.pause(); // 停止播放音乐
        audio.currentTime = 0; // 重置音乐播放时间
    }

    // 处理学生到场与表现
    function handleStudentAttendance(student) {
        const isPresent = confirm(`${student.name} 是否到场？`);
        if (!isPresent) {
            student.points -= 1;
            alert(`${student.name} 未到场，扣1分。当前积分：${student.points}`);
        } else {
            const answeredCorrectly = confirm(`${student.name} 是否准确回答问题？`);
            if (!answeredCorrectly) {
                student.points += 0.5;
                alert(`${student.name} 回答错误，默认得分：0.5。当前积分：${student.points}`);
            } else {
                const score = parseFloat(prompt(`${student.name} 回答问题得分（0.5-3分）：`));
                if (!isNaN(score) && score >= 0.5 && score <= 3) {
                    student.points += score;
                    alert(`${student.name} 回答正确，得分：${score}。当前积分：${student.points}`);
                } else {
                    student.points += 0.5;
                    alert(`${student.name} 输入无效，默认得分：0.5。当前积分：${student.points}`);
                }
                triggerRandomEvents(student);
            }
        }
    }

    // 触发随机事件
    function triggerRandomEvents(student) {
        const randomEvent = Math.random();
        if (randomEvent < 0.5) { // 50%的触发几率
            student.points *= 2;
            alert(`${student.name} 触发双倍积分！当前积分：${student.points}`);
        } else if (randomEvent < 0.2) {
            alert(`${student.name} 触发点名转移权！下次可以选择不回答问题。`);
        }
    }

    // 开始/结束按钮点击事件
    window.clickButton = function (button) {
        if (isRunning) {
            stopRandomName();
            button.innerText = '开始';
        } else {
            startRandomName();
            button.innerText = '结束';
        }
    };

    // 权重随机选择与疯狂星期四加成
    function weightedRandomSelection() {
        const totalWeight = students.reduce((sum, student) => sum + (1 / (student.points + 1)), 0);
        let random = Math.random() * totalWeight;
        for (const student of students) {
            random -= (1 / (student.points + 1));
            if (random <= 0) {
                return student;
            }
        }
        return students[students.length - 1];
    }

    function applyThursdayBonus() {
        const today = new Date();
        if (today.getDay() === 4) { // 星期四
            students.forEach(student => {
                if (student.points % 50 === 0) {
                    student.points *= 2;
                }
            });
        }
    }

    applyThursdayBonus();

    module.exports = {
        startRandomName,
        stopRandomName,
        handleStudentAttendance,
        weightedRandomSelection,
        applyThursdayBonus
    };

});