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<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Take a Break - Snake Game</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            overflow: hidden;
            position: relative;
        }
        
        /* 背景动画粒子 */
        .particles {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            overflow: hidden;
            z-index: 0;
        }
        
        .particle {
            position: absolute;
            width: 4px;
            height: 4px;
            background: rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            animation: float 15s infinite;
        }
        
        @keyframes float {
            0%, 100% {
                transform: translateY(100vh) rotate(0deg);
                opacity: 0;
            }
            10% {
                opacity: 1;
            }
            90% {
                opacity: 1;
            }
            100% {
                transform: translateY(-100vh) rotate(720deg);
                opacity: 0;
            }
        }
        
        /* 主容器 */
        .container {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 20px;
        }
        
        /* 标题区域 */
        .header {
            margin-bottom: 20px;
        }
        
        .header h1 {
            color: #fff;
            font-size: 2.5em;
            margin-bottom: 10px;
            text-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
            background: linear-gradient(90deg, #00ffff, #ff00ff, #ffff00);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            animation: glow 2s ease-in-out infinite alternate;
        }
        
        @keyframes glow {
            from {
                filter: drop-shadow(0 0 10px rgba(0, 255, 255, 0.5));
            }
            to {
                filter: drop-shadow(0 0 20px rgba(255, 0, 255, 0.5));
            }
        }
        
        .header p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1em;
        }
        
        /* 游戏区域 */
        .game-wrapper {
            display: inline-block;
            background: rgba(0, 0, 0, 0.6);
            border-radius: 20px;
            padding: 20px;
            box-shadow: 
                0 0 50px rgba(0, 255, 255, 0.2),
                inset 0 0 50px rgba(0, 0, 0, 0.5);
            border: 2px solid rgba(0, 255, 255, 0.3);
        }
        
        .score-board {
            display: flex;
            justify-content: space-around;
            margin-bottom: 15px;
            padding: 10px 15px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            color: #fff;
            font-size: 1.1em;
            font-weight: bold;
            gap: 15px;
        }
        
        .score-item {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .score-label {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.8em;
        }
        
        .score-value {
            color: #00ffff;
            font-size: 1.3em;
            text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
        }
        
        #gameCanvas {
            border-radius: 10px;
            box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);
            background: #0a0a0a;
        }
        
        /* 控制按钮 */
        .controls {
            margin-top: 20px;
            display: flex;
            gap: 15px;
            justify-content: center;
            flex-wrap: wrap;
        }
        
        .btn {
            padding: 12px 30px;
            border: none;
            border-radius: 25px;
            font-size: 1em;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        
        .btn-primary {
            background: linear-gradient(135deg, #00ffff 0%, #0080ff 100%);
            color: #000;
            box-shadow: 0 4px 15px rgba(0, 255, 255, 0.4);
        }
        
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 25px rgba(0, 255, 255, 0.6);
        }
        
        .btn-secondary {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.3);
        }
        
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.2);
            border-color: rgba(255, 255, 255, 0.5);
        }
        
        /* 移动端控制 */
        .mobile-controls {
            display: none;
            margin-top: 20px;
        }
        
        .d-pad {
            display: grid;
            grid-template-columns: repeat(3, 60px);
            grid-template-rows: repeat(3, 60px);
            gap: 5px;
            justify-content: center;
        }
        
        .d-btn {
            background: rgba(255, 255, 255, 0.1);
            border: 2px solid rgba(0, 255, 255, 0.3);
            border-radius: 10px;
            color: #fff;
            font-size: 1.5em;
            cursor: pointer;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .d-btn:hover, .d-btn:active {
            background: rgba(0, 255, 255, 0.3);
            border-color: #00ffff;
        }
        
        .d-btn:nth-child(2) { grid-column: 2; grid-row: 1; }
        .d-btn:nth-child(4) { grid-column: 1; grid-row: 2; }
        .d-btn:nth-child(5) { grid-column: 2; grid-row: 2; background: rgba(0, 255, 255, 0.2); }
        .d-btn:nth-child(6) { grid-column: 3; grid-row: 2; }
        .d-btn:nth-child(8) { grid-column: 2; grid-row: 3; }
        
        /* 提示信息 */
        .tips {
            margin-top: 20px;
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9em;
        }
        
        .tips kbd {
            background: rgba(255, 255, 255, 0.2);
            padding: 2px 8px;
            border-radius: 4px;
            font-family: monospace;
        }
        
        /* 游戏结束覆盖层 */
        .game-over {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: rgba(0, 0, 0, 0.9);
            padding: 40px;
            border-radius: 20px;
            text-align: center;
            display: none;
            border: 2px solid #ff0066;
            box-shadow: 0 0 50px rgba(255, 0, 102, 0.5);
        }
        
        .game-over h2 {
            color: #ff0066;
            font-size: 2em;
            margin-bottom: 20px;
            text-shadow: 0 0 20px rgba(255, 0, 102, 0.5);
        }
        
        .game-over .final-score {
            color: #fff;
            font-size: 1.5em;
            margin-bottom: 20px;
        }
        
        /* 响应式 */
        @media (max-width: 600px) {
            .header h1 {
                font-size: 1.8em;
            }
            
            #gameCanvas {
                width: 100%;
                max-width: 350px;
                height: auto;
            }
            
            .mobile-controls {
                display: block;
            }
            
            .tips {
                display: none;
            }
        }
        
        /* 登录链接 */
        .login-link {
            margin-top: 30px;
            color: rgba(255, 255, 255, 0.5);
        }
        
        .login-link a {
            color: #00ffff;
            text-decoration: none;
            border-bottom: 1px dashed #00ffff;
            transition: all 0.3s;
        }
        
        .login-link a:hover {
            color: #fff;
            border-bottom-style: solid;
        }
    </style>
</head>
<body>
    <!-- 背景粒子 -->
    <div class="particles" id="particles"></div>
    
    <div class="container">
        <div class="header">
            <h1>🐍 Snake Game</h1>
            <p>Take a break and enjoy a game!</p>
        </div>
        
        <div class="game-wrapper">
            <div class="score-board">
                <div class="score-item">
                    <span class="score-label">SCORE</span>
                    <span class="score-value" id="score">0</span>
                </div>
                <div class="score-item" id="modeIndicator">
                    <span class="score-label" style="color: #ff00ff; text-shadow: 0 0 10px rgba(255, 0, 255, 0.5);">DEMO MODE</span>
                </div>
                <div class="score-item">
                    <span class="score-label">HIGH SCORE</span>
                    <span class="score-value" id="highScore">0</span>
                </div>
            </div>
            
            <canvas id="gameCanvas" width="400" height="400"></canvas>
            
            <div class="game-over" id="gameOver">
                <h2>GAME OVER</h2>
                <div class="final-score">Final Score: <span id="finalScore">0</span></div>
                <button class="btn btn-primary" onclick="startGame()">PLAY AGAIN</button>
            </div>
            
            <div class="controls">
                <button class="btn btn-primary" id="startBtn" onclick="startGame()">CLICK TO PLAY</button>
                <button class="btn btn-secondary" onclick="pauseGame()" id="pauseBtn" disabled>PAUSE</button>
            </div>
            
            <!-- 移动端控制 -->
            <div class="mobile-controls">
                <div class="d-pad">
                    <div class="d-btn" onclick="changeDirection('up')"></div>
                    <div class="d-btn" onclick="changeDirection('left')"></div>
                    <div class="d-btn"></div>
                    <div class="d-btn" onclick="changeDirection('right')"></div>
                    <div class="d-btn" onclick="changeDirection('down')"></div>
                </div>
            </div>
            
            <div class="tips">
                Use <kbd></kbd> <kbd></kbd> <kbd></kbd> <kbd></kbd> or <kbd>W</kbd> <kbd>S</kbd> <kbd>A</kbd> <kbd>D</kbd> to control
            </div>
        </div>
        
        <div class="login-link">
            Need to manage your server? <a href="/login">Login here</a>
        </div>
    </div>

    <script>
        // 游戏配置
        const canvas = document.getElementById('gameCanvas');
        const ctx = canvas.getContext('2d');
        const gridSize = 20;
        const tileCount = canvas.width / gridSize;
        
        let snake = [];
        let food = {};
        let direction = 'right';
        let nextDirection = 'right';
        let score = 0;
        let highScore = localStorage.getItem('snakeHighScore') || 0;
        let gameLoop = null;
        let isPaused = false;
        let isGameOver = false;
        let gameSpeed = 100;
        let isDemoMode = true; // 演示模式标志
        let isUserMode = false; // 用户交互模式标志
        
        // 初始化最高分显示
        document.getElementById('highScore').textContent = highScore;
        
        // 创建背景粒子
        function createParticles() {
            const container = document.getElementById('particles');
            for (let i = 0; i < 50; i++) {
                const particle = document.createElement('div');
                particle.className = 'particle';
                particle.style.left = Math.random() * 100 + '%';
                particle.style.animationDelay = Math.random() * 15 + 's';
                particle.style.animationDuration = (10 + Math.random() * 10) + 's';
                container.appendChild(particle);
            }
        }
        
        // 初始化游戏
        function initGame() {
            snake = [
                { x: 5, y: 10 },
                { x: 4, y: 10 },
                { x: 3, y: 10 }
            ];
            direction = 'right';
            nextDirection = 'right';
            score = 0;
            isGameOver = false;
            isPaused = false;
            gameSpeed = 100;
            document.getElementById('score').textContent = score;
            document.getElementById('gameOver').style.display = 'none';
            if (isUserMode) {
                document.getElementById('startBtn').textContent = 'RESTART';
            } else {
                document.getElementById('startBtn').textContent = 'CLICK TO PLAY';
            }
            spawnFood();
        }
        
        // AI自动寻路(演示模式)
        function getAIDirection() {
            const head = snake[0];
            let bestDirection = direction;
            let minDistance = Infinity;
            
            const directions = ['up', 'down', 'left', 'right'];
            const opposites = { 'up': 'down', 'down': 'up', 'left': 'right', 'right': 'left' };
            
            for (const dir of directions) {
                // 避免180度转向
                if (opposites[dir] === direction) continue;
                
                let nextX = head.x;
                let nextY = head.y;
                
                switch(dir) {
                    case 'up': nextY--; break;
                    case 'down': nextY++; break;
                    case 'left': nextX--; break;
                    case 'right': nextX++; break;
                }
                
                // 检查是否会撞墙或撞到自己
                if (nextX < 0 || nextX >= tileCount || nextY < 0 || nextY >= tileCount) continue;
                if (isSnakeAt(nextX, nextY)) continue;
                
                // 计算到食物的距离
                const distance = Math.abs(nextX - food.x) + Math.abs(nextY - food.y);
                
                if (distance < minDistance) {
                    minDistance = distance;
                    bestDirection = dir;
                }
            }
            
            return bestDirection;
        }
        
        // 生成食物
        function spawnFood() {
            do {
                food = {
                    x: Math.floor(Math.random() * tileCount),
                    y: Math.floor(Math.random() * tileCount)
                };
            } while (isSnakeAt(food.x, food.y));
        }
        
        // 检查蛇是否在指定位置
        function isSnakeAt(x, y) {
            return snake.some(segment => segment.x === x && segment.y === y);
        }
        
        // 绘制游戏
        function draw() {
            // 清空画布
            ctx.fillStyle = '#0a0a0a';
            ctx.fillRect(0, 0, canvas.width, canvas.height);
            
            // 绘制网格
            ctx.strokeStyle = 'rgba(0, 255, 255, 0.05)';
            ctx.lineWidth = 1;
            for (let i = 0; i <= tileCount; i++) {
                ctx.beginPath();
                ctx.moveTo(i * gridSize, 0);
                ctx.lineTo(i * gridSize, canvas.height);
                ctx.stroke();
                ctx.beginPath();
                ctx.moveTo(0, i * gridSize);
                ctx.lineTo(canvas.width, i * gridSize);
                ctx.stroke();
            }
            
            // 绘制食物(发光效果)
            const foodX = food.x * gridSize;
            const foodY = food.y * gridSize;
            
            // 食物光晕
            const gradient = ctx.createRadialGradient(
                foodX + gridSize/2, foodY + gridSize/2, 0,
                foodX + gridSize/2, foodY + gridSize/2, gridSize
            );
            gradient.addColorStop(0, 'rgba(255, 0, 102, 0.8)');
            gradient.addColorStop(1, 'rgba(255, 0, 102, 0)');
            ctx.fillStyle = gradient;
            ctx.fillRect(foodX - gridSize/2, foodY - gridSize/2, gridSize * 2, gridSize * 2);
            
            // 食物本体
            ctx.fillStyle = '#ff0066';
            ctx.shadowColor = '#ff0066';
            ctx.shadowBlur = 20;
            ctx.fillRect(foodX + 2, foodY + 2, gridSize - 4, gridSize - 4);
            ctx.shadowBlur = 0;
            
            // 绘制蛇
            snake.forEach((segment, index) => {
                const x = segment.x * gridSize;
                const y = segment.y * gridSize;
                
                if (index === 0) {
                    // 蛇头
                    ctx.fillStyle = '#00ffff';
                    ctx.shadowColor = '#00ffff';
                    ctx.shadowBlur = 15;
                } else {
                    // 蛇身渐变
                    const ratio = index / snake.length;
                    const r = Math.floor(0 * (1 - ratio) + 0 * ratio);
                    const g = Math.floor(255 * (1 - ratio) + 100 * ratio);
                    const b = Math.floor(255 * (1 - ratio) + 200 * ratio);
                    ctx.fillStyle = `rgb(${r}, ${g}, ${b})`;
                    ctx.shadowColor = ctx.fillStyle;
                    ctx.shadowBlur = 10;
                }
                
                ctx.fillRect(x + 1, y + 1, gridSize - 2, gridSize - 2);
                
                // 蛇眼
                if (index === 0) {
                    ctx.fillStyle = '#000';
                    ctx.shadowBlur = 0;
                    const eyeSize = 3;
                    let eye1X, eye1Y, eye2X, eye2Y;
                    
                    switch(direction) {
                        case 'up':
                            eye1X = x + 5; eye1Y = y + 5;
                            eye2X = x + 14; eye2Y = y + 5;
                            break;
                        case 'down':
                            eye1X = x + 5; eye1Y = y + 12;
                            eye2X = x + 14; eye2Y = y + 12;
                            break;
                        case 'left':
                            eye1X = x + 5; eye1Y = y + 5;
                            eye2X = x + 5; eye2Y = y + 12;
                            break;
                        case 'right':
                            eye1X = x + 12; eye1Y = y + 5;
                            eye2X = x + 12; eye2Y = y + 12;
                            break;
                    }
                    ctx.fillRect(eye1X, eye1Y, eyeSize, eyeSize);
                    ctx.fillRect(eye2X, eye2Y, eyeSize, eyeSize);
                }
            });
            ctx.shadowBlur = 0;
        }
        
        // 更新游戏状态
        function update() {
            if (isPaused || isGameOver) return;
            
            // 演示模式下AI自动控制
            if (isDemoMode && !isUserMode) {
                nextDirection = getAIDirection();
            }
            
            direction = nextDirection;
            
            const head = { ...snake[0] };
            
            switch(direction) {
                case 'up': head.y--; break;
                case 'down': head.y++; break;
                case 'left': head.x--; break;
                case 'right': head.x++; break;
            }
            
            // 检查碰撞
            if (head.x < 0 || head.x >= tileCount || head.y < 0 || head.y >= tileCount) {
                if (isDemoMode && !isUserMode) {
                    // 演示模式下自动重新开始
                    initGame();
                    return;
                }
                gameOver();
                return;
            }
            
            if (isSnakeAt(head.x, head.y)) {
                if (isDemoMode && !isUserMode) {
                    // 演示模式下自动重新开始
                    initGame();
                    return;
                }
                gameOver();
                return;
            }
            
            snake.unshift(head);
            
            // 检查是否吃到食物
            if (head.x === food.x && head.y === food.y) {
                score += 10;
                document.getElementById('score').textContent = score;
                
                // 更新最高分
                if (score > highScore) {
                    highScore = score;
                    localStorage.setItem('snakeHighScore', highScore);
                    document.getElementById('highScore').textContent = highScore;
                }
                
                // 加速
                if (gameSpeed > 50) {
                    gameSpeed -= 2;
                    clearInterval(gameLoop);
                    gameLoop = setInterval(gameStep, gameSpeed);
                }
                
                spawnFood();
            } else {
                snake.pop();
            }
        }
        
        // 游戏步进
        function gameStep() {
            update();
            draw();
        }
        
        // 游戏结束
        function gameOver() {
            isGameOver = true;
            clearInterval(gameLoop);
            document.getElementById('finalScore').textContent = score;
            document.getElementById('gameOver').style.display = 'block';
        }
        
        // 切换到用户模式
        function switchToUserMode() {
            if (!isUserMode) {
                isUserMode = true;
                isDemoMode = false;
                document.getElementById('startBtn').textContent = 'RESTART';
                document.getElementById('pauseBtn').disabled = false;
                // 更新模式指示器
                const modeIndicator = document.getElementById('modeIndicator');
                if (modeIndicator) {
                    modeIndicator.innerHTML = '<span class="score-label" style="color: #00ff00; text-shadow: 0 0 10px rgba(0, 255, 0, 0.5);">USER MODE</span>';
                }
                // 显示提示
                showModeIndicator('USER MODE');
            }
        }
        
        // 显示模式指示器
        function showModeIndicator(text) {
            const indicator = document.createElement('div');
            indicator.style.cssText = `
                position: absolute;
                top: 50%;
                left: 50%;
                transform: translate(-50%, -50%);
                background: rgba(0, 255, 255, 0.9);
                color: #000;
                padding: 15px 30px;
                border-radius: 10px;
                font-weight: bold;
                font-size: 1.2em;
                z-index: 100;
                animation: fadeInOut 1.5s ease-in-out;
            `;
            indicator.textContent = text;
            document.querySelector('.game-wrapper').appendChild(indicator);
            setTimeout(() => indicator.remove(), 1500);
        }
        
        // 添加淡入淡出动画
        const style = document.createElement('style');
        style.textContent = `
            @keyframes fadeInOut {
                0% { opacity: 0; transform: translate(-50%, -50%) scale(0.8); }
                50% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
                100% { opacity: 0; transform: translate(-50%, -50%) scale(0.8); }
            }
        `;
        document.head.appendChild(style);
        
        // 开始游戏
        function startGame() {
            clearInterval(gameLoop);
            switchToUserMode();
            initGame();
            draw();
            gameLoop = setInterval(gameStep, gameSpeed);
        }
        
        // 暂停游戏
        function pauseGame() {
            if (isGameOver) return;
            isPaused = !isPaused;
            event.target.textContent = isPaused ? 'RESUME' : 'PAUSE';
        }
        
        // 改变方向
        function changeDirection(newDirection) {
            // 第一次用户操作时切换到用户模式
            switchToUserMode();
            
            const opposites = {
                'up': 'down',
                'down': 'up',
                'left': 'right',
                'right': 'left'
            };
            
            if (opposites[newDirection] !== direction) {
                nextDirection = newDirection;
            }
        }
        
        // 键盘控制
        document.addEventListener('keydown', (e) => {
            switch(e.key) {
                case 'ArrowUp':
                case 'w':
                case 'W':
                    e.preventDefault();
                    changeDirection('up');
                    break;
                case 'ArrowDown':
                case 's':
                case 'S':
                    e.preventDefault();
                    changeDirection('down');
                    break;
                case 'ArrowLeft':
                case 'a':
                case 'A':
                    e.preventDefault();
                    changeDirection('left');
                    break;
                case 'ArrowRight':
                case 'd':
                case 'D':
                    e.preventDefault();
                    changeDirection('right');
                    break;
                case ' ':
                    e.preventDefault();
                    pauseGame();
                    break;
            }
        });
        
        // 触摸控制(防止页面滚动)
        document.addEventListener('touchmove', (e) => {
            e.preventDefault();
        }, { passive: false });
        
        // 点击画布切换到用户模式
        canvas.addEventListener('click', () => {
            switchToUserMode();
        });
        
        // 点击移动端控制按钮切换到用户模式
        document.querySelectorAll('.d-btn').forEach(btn => {
            btn.addEventListener('click', () => {
                switchToUserMode();
            });
        });
        
        // 初始化
        createParticles();
        initGame();
        draw();
        gameLoop = setInterval(gameStep, gameSpeed);
    </script>
</body>
</html>