// 用户点名JavaScript - 支持服务器和本地双模式

// 状态管理
let currentList = null;
let stream = null;

// DOM元素
const inputSection = document.getElementById('inputSection');
const rollCallSection = document.getElementById('rollCallSection');
const enterForm = document.getElementById('enterForm');
const codeInput = document.getElementById('codeInput');
const scanQRBtn = document.getElementById('scanQRBtn');
const completedCount = document.getElementById('completedCount');
const totalCount = document.getElementById('totalCount');
const progressFill = document.getElementById('progressFill');
const memberListDisplay = document.getElementById('memberListDisplay');
const video = document.getElementById('video');
const canvas = document.getElementById('canvas');
const startCameraBtn = document.getElementById('startCameraBtn');
const captureBtn = document.getElementById('captureBtn');
const stopCameraBtn = document.getElementById('stopCameraBtn');
const capturedPhoto = document.getElementById('capturedPhoto');
const photoPreview = document.getElementById('photoPreview');
const confirmPhotoBtn = document.getElementById('confirmPhotoBtn');
const retakeBtn = document.getElementById('retakeBtn');
const manualSelect = document.getElementById('manualSelect');
const manualRollCallBtn = document.getElementById('manualRollCallBtn');

// 初始化
document.addEventListener('DOMContentLoaded', () => {
    // 显示运行模式
    const modeText = dataStorage.isServerMode ? '服务器模式' : '本地模式';
    const modeIndicator = document.getElementById('modeIndicator');
    
    if (modeIndicator) {
        modeIndicator.textContent = `当前运行模式: ${modeText}`;
        if (!dataStorage.isServerMode) {
            modeIndicator.textContent += ' (数据保存在浏览器本地)';
        }
    }
    
    console.log(`点名系统运行在: ${modeText}`);
    
    // 检查URL参数
    const urlParams = new URLSearchParams(window.location.search);
    const codeFromUrl = urlParams.get('code');
    if (codeFromUrl) {
        codeInput.value = codeFromUrl;
        enterRollCall(codeFromUrl);
    }
});

// 进入点名
enterForm.addEventListener('submit', (e) => {
    e.preventDefault();
    const code = codeInput.value.trim();
    enterRollCall(code);
});

async function enterRollCall(code) {
    try {
        currentList = await dataStorage.getList(code);
        
        inputSection.style.display = 'none';
        rollCallSection.style.display = 'block';
        
        updateProgress();
        renderMemberList();
        populateManualSelect();
    } catch (error) {
        alert('进入点名失败：' + error.message);
    }
}

// 扫描二维码（简化版）
scanQRBtn.addEventListener('click', () => {
    alert('扫码功能需要集成摄像头扫码库，当前版本请手动输入编号');
});

// 更新进度
function updateProgress() {
    if (!currentList) return;

    const completed = currentList.members.filter(m => m.completed).length;
    const total = currentList.members.length;
    const percentage = total > 0 ? (completed / total * 100) : 0;

    completedCount.textContent = completed;
    totalCount.textContent = total;
    progressFill.style.width = percentage + '%';
    progressFill.textContent = Math.round(percentage) + '%';
}

// 渲染成员列表
function renderMemberList() {
    if (!currentList) return;

    memberListDisplay.innerHTML = currentList.members.map((member, index) => `
        <div class="member-item ${member.completed ? 'completed' : ''}">
            <span class="member-name">${member.name}</span>
            <span class="member-status ${member.completed ? 'status-completed' : 'status-pending'}">
                ${member.completed ? '已点名' : '未点名'}
            </span>
        </div>
    `).join('');
}

// 填充手动选择下拉框
function populateManualSelect() {
    if (!currentList) return;

    const uncompletedMembers = currentList.members.filter(m => !m.completed);
    manualSelect.innerHTML = '<option value="">请选择姓名</option>' +
        uncompletedMembers.map(member => `<option value="${member.name}">${member.name}</option>`).join('');
}

// 开启摄像头
startCameraBtn.addEventListener('click', async () => {
    try {
        stream = await navigator.mediaDevices.getUserMedia({ video: true });
        video.srcObject = stream;
        video.style.display = 'block';
        startCameraBtn.style.display = 'none';
        captureBtn.style.display = 'inline-block';
        stopCameraBtn.style.display = 'inline-block';
    } catch (err) {
        alert('无法访问摄像头，请检查权限设置');
        console.error(err);
    }
});

// 拍照
captureBtn.addEventListener('click', () => {
    const context = canvas.getContext('2d');
    context.drawImage(video, 0, 0, canvas.width, canvas.height);
    
    const dataURL = canvas.toDataURL('image/jpeg');
    photoPreview.src = dataURL;
    
    capturedPhoto.style.display = 'block';
    video.style.display = 'none';
    captureBtn.style.display = 'none';
});

// 关闭摄像头
stopCameraBtn.addEventListener('click', () => {
    if (stream) {
        stream.getTracks().forEach(track => track.stop());
        stream = null;
    }
    video.style.display = 'block';
    capturedPhoto.style.display = 'none';
    startCameraBtn.style.display = 'inline-block';
    captureBtn.style.display = 'none';
    stopCameraBtn.style.display = 'none';
});

// 确认照片
confirmPhotoBtn.addEventListener('click', () => {
    // 模拟人脸识别
    const recognizedName = simulateFaceRecognition();
    
    if (recognizedName) {
        markAsCompleted(recognizedName);
        alert(`识别成功：${recognizedName}`);
    } else {
        alert('未能识别，请手动选择姓名');
    }
    
    // 重置拍照区域
    capturedPhoto.style.display = 'none';
    video.style.display = 'block';
    captureBtn.style.display = 'inline-block';
});

// 重新拍摄
retakeBtn.addEventListener('click', () => {
    capturedPhoto.style.display = 'none';
    video.style.display = 'block';
    captureBtn.style.display = 'inline-block';
});

// 模拟人脸识别
function simulateFaceRecognition() {
    // 随机返回一个未点名的成员（模拟识别）
    const uncompletedMembers = currentList.members.filter(m => !m.completed);
    if (uncompletedMembers.length === 0) return null;
    
    const randomIndex = Math.floor(Math.random() * uncompletedMembers.length);
    return uncompletedMembers[randomIndex].name;
}

// 手动点名
manualRollCallBtn.addEventListener('click', () => {
    const selectedName = manualSelect.value;
    if (!selectedName) {
        alert('请选择姓名');
        return;
    }
    markAsCompleted(selectedName);
});

// 标记为已完成
async function markAsCompleted(name) {
    try {
        await dataStorage.rollCall(currentList.code, name);
        
        // 更新本地数据
        const member = currentList.members.find(m => m.name === name);
        if (member) {
            member.completed = true;
            member.timestamp = new Date().toLocaleString();
        }
        
        // 更新UI
        updateProgress();
        renderMemberList();
        populateManualSelect();
        
        // 检查是否全部完成
        const allCompleted = currentList.members.every(m => m.completed);
        if (allCompleted) {
            alert('点名完成！所有成员已点名');
        }
    } catch (error) {
        alert('点名失败：' + error.message);
    }
}