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<link href="https://fonts.googleapis.com/css2?family=Prompt:wght@400;600;800&family=Fira+Code:wght@500&display=swap" rel="stylesheet">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/sweetalert2@11/dist/sweetalert2.min.css">
<script src="https://cdn.jsdelivr.net/npm/sweetalert2@11"></script>

<div class="dd-wrapper" id="dd-game-container">
    
    
    <div id="dd-screen-start" class="dd-screen dd-active">
        <div style="font-size: 70px; margin-bottom: 10px; animation: ddFloat 2s ease-in-out infinite;">🛵💨</div>
        <h1 class="dd-title">Delivery Debugger</h1>
        <p class="dd-subtitle">ภารกิจ: กู้ระบบสั่งอาหารเดลิเวอรี</p>
        
        <div class="dd-rules-box">
            <h3 style="color: #FFCDD2; margin-top: 0; font-size: 18px; text-shadow: 0 1px 2px rgba(0,0,0,0.3);">📋 คู่มือนักสืบดิจิทัล</h3>
            <ul style="margin: 0; font-size: 15px; color: #FFFFFF; line-height: 1.6; text-align: left; padding-left: 20px;">
                <li>ระบบสั่งอาหารรวน ทำให้ขั้นตอนสลับกันมั่วไปหมด!</li>
                <li><strong>ลาก (Drag)</strong> หรือกด <strong>ปุ่มลูกศร ⬆️⬇️</strong> เพื่อสลับตำแหน่งกล่องข้อความ</li>
                <li>เรียงลำดับขั้นตอนการสั่งอาหารให้ถูกต้องตั้งแต่ <strong>เริ่มต้น</strong> ถึง <strong>รอรับอาหาร</strong></li>
                <li>เมื่อมั่นใจแล้ว ให้กดปุ่ม "ตรวจสอบลำดับ (Run)"</li>
            </ul>
        </div>
        
        <button class="dd-btn dd-btn-primary" onclick="dd_promptName()">เริ่มกู้ระบบ 🚀</button>
    </div>

<div id="dd-screen-game" class="dd-screen" style="padding: 20px;">
        
        
        <div class="dd-hud">
            <div class="dd-hud-item">
                <span class="dd-hud-label">ผู้เล่น (นักสืบ)</span><br>
                <strong id="dd-ui-name" style="color: #E63946; font-size: 16px;">-</strong>
            </div>
            <div class="dd-hud-item" style="text-align: center;">
                <span class="dd-hud-label">ภารกิจ</span><br>
                <strong style="color: #780016; font-size: 18px;">กู้ระบบเดลิเวอรี</strong>
            </div>
            <div class="dd-hud-item" style="text-align: right;">
                <span class="dd-hud-label">สถานะ</span><br>
                <span style="font-size: 16px; font-weight: bold; color: #2E7D32;">🟢 Online</span>
            </div>
        </div>

<div class="dd-game-area">
            
            
            <div class="dd-narrative-panel">
                <div class="dd-panel-header">📝 สถานการณ์ (โจทย์)</div>
                <div class="dd-narrative-content">
                    <strong>ปัญหาที่พบ:</strong><br>
                    ลูกค้ากดสั่งอาหารไม่ได้ เพราะโปรแกรมทำงานผิดลำดับ<br><br>
                    <strong>หน้าที่ของคุณ:</strong><br>
                    จัดเรียงอัลกอริทึม (Algorithm) การสั่งอาหารผ่านแอปพลิเคชันใหม่ให้ถูกต้องตามหลักตรรกะ เพื่อให้โปรแกรมกลับมาทำงานได้ปกติ!
                </div>
            </div>

<div class="dd-editor-panel">
                <div class="dd-panel-header" style="background: #4A000D; color: #FFCDD2;">📋 จัดเรียงขั้นตอน (Algorithm)</div>
                <div class="dd-editor-content">
                    
                    <ul class="dd-sortable-list" id="dd-sortable-list">
                        
                    </ul>
                </div>
            </div>
        </div>

<div style="text-align: center; margin-top: 15px;">
            <button class="dd-btn dd-btn-success" onclick="dd_checkAnswer()">ตรวจสอบลำดับ (Run) ▶️</button>
        </div>
    </div>

<div id="dd-screen-result" class="dd-screen">
        <div id="dd-res-icon" style="font-size: 80px; margin-bottom: 10px; animation: ddPop 1s infinite alternate;">🏆✨</div>
        <h1 class="dd-title" id="dd-result-title" style="color: #E63946;">ภารกิจสำเร็จ!</h1>
        <p class="dd-subtitle" id="dd-result-desc" style="color: #780016;">ระบบเดลิเวอรีกลับมาใช้งานได้แล้ว</p>
        
        <div class="dd-rules-box" style="text-align: center; border-color: #E63946; background: #780016;">
            <p style="margin: 0; font-size: 18px; color: #FFF;">นักแก้ปัญหา: <strong id="dd-result-name" style="color: #FFCDD2; font-size: 22px;">-</strong></p>
            <p style="margin: 10px 0 0 0; font-size: 15px; color: #FFEBEE;">การเรียงลำดับความคิดอย่างเป็นขั้นเป็นตอนแบบนี้ เรียกว่า <strong>"อัลกอริทึม"</strong> ซึ่งสามารถนำไปวาดเป็น "ผังงาน (Flowchart)" ต่อไปได้!</p>
        </div>
        
        <button class="dd-btn dd-btn-primary" onclick="dd_restartGame()">เล่นอีกครั้ง 🔄</button>
    </div>

</div>

<style>
    /* ==========================================
       Scoped CSS: ใช้ prefix .dd- ป้องกันการตีกัน
       ========================================== */
    .dd-wrapper {
        font-family: 'Prompt', sans-serif;
        width: 100%;
        max-width: 900px;
        margin: 20px auto;
        background: #ECEFF1;
        border-radius: 20px;
        box-shadow: 0 10px 30px rgba(120, 0, 22, 0.15);
        border: 4px solid #780016;
        overflow: hidden;
        position: relative;
        color: #333;
        box-sizing: border-box;
        touch-action: manipulation;
    }

.dd-wrapper * { box-sizing: border-box; }

.dd-screen { display: none; padding: 40px 30px; animation: ddFadeIn 0.3s ease-out forwards; min-height: 600px; flex-direction: column; justify-content: center; align-items: center; }
    .dd-screen.dd-active { display: flex; }
    #dd-screen-game { display: none; flex-direction: column; justify-content: flex-start; align-items: stretch; }
    #dd-screen-game.dd-active { display: flex; }

@keyframes ddFadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
    @keyframes ddFloat { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
    @keyframes ddPop { 0% { transform: scale(1); } 50% { transform: scale(1.05); } 100% { transform: scale(1); } }

.dd-title { font-size: 36px; color: #780016; margin: 0 0 5px 0; font-weight: 800; text-align: center; }
    .dd-subtitle { font-size: 18px; color: #E63946; font-weight: 600; margin: 0 0 25px 0; text-align: center; }

.dd-rules-box {
        background: #780016; border: 3px solid #E63946;
        padding: 25px; border-radius: 15px; margin: 0 auto 30px auto; max-width: 500px;
        box-shadow: 0 8px 15px rgba(230, 57, 70, 0.3);
    }

.dd-btn {
        display: inline-block; padding: 15px 35px; font-size: 18px; font-weight: 800;
        border: none; border-radius: 12px; cursor: pointer; transition: all 0.1s;
        font-family: 'Prompt', sans-serif; text-align: center;
    }
    .dd-btn-primary { background: #780016; color: #FFFFFF; box-shadow: 0 6px 0 #4A000D; }
    .dd-btn-primary:active { transform: translateY(6px); box-shadow: 0 0px 0 #4A000D; }
    
    .dd-btn-success { background: #E63946; color: #FFFFFF; box-shadow: 0 6px 0 #B31222; width: 100%; max-width: 300px; }
    .dd-btn-success:active { transform: translateY(6px); box-shadow: 0 0px 0 #B31222; }

.dd-hud {
        display: flex; justify-content: space-between; align-items: center;
        background: #FFFFFF; padding: 10px 20px; border-radius: 12px;
        margin-bottom: 20px; border: 2px solid #780016; box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    }
    .dd-hud-item { flex: 1; text-align: left; line-height: 1.2; }
    .dd-hud-label { font-size: 12px; color: #78909C; font-weight: bold; }

.dd-game-area { display: flex; gap: 15px; margin-bottom: 15px; flex-direction: column; }
    @media (min-width: 700px) { .dd-game-area { flex-direction: row; } }

.dd-narrative-panel, .dd-editor-panel {
        flex: 1; background: #FFF; border-radius: 12px; border: 2px solid #FFCDD2;
        overflow: hidden; box-shadow: 0 4px 8px rgba(0,0,0,0.05); display: flex; flex-direction: column;
    }

.dd-panel-header { background: #780016; color: #FFF; padding: 10px 15px; font-weight: bold; font-size: 15px; text-align: center; }
    .dd-narrative-content { padding: 15px; font-size: 16px; line-height: 1.8; color: #333; font-weight: 500; }
    .dd-editor-content { padding: 15px; display: flex; flex-direction: column; gap: 8px; background: #F5F7FA; flex: 1; }

/* ================= Sortable List Styles ================= */
    .dd-sortable-list {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 10px;
        margin: 0; padding: 0;
    }

.dd-sortable-item {
        background-color: #780016;
        color: #FFF;
        padding: 10px 15px;
        border-radius: 8px;
        font-size: 15px;
        font-weight: 500;
        display: flex;
        justify-content: space-between;
        align-items: center;
        cursor: grab;
        box-shadow: 0 4px 0 #4A000D;
        transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s;
        border: 1px solid #E63946;
    }

.dd-sortable-item:active {
        cursor: grabbing;
        transform: scale(1.02) translateY(2px);
        box-shadow: 0 2px 0 #4A000D;
        z-index: 10;
    }

.dd-sortable-item.dd-drag-over {
        background-color: #4A000D;
        border: 2px dashed #FFCDD2;
        transform: scale(1.03);
    }

.dd-item-text {
        display: flex;
        align-items: center;
        gap: 10px;
        pointer-events: none; /* กันการคลุมดำเวลากดลาก */
    }

/* ปุ่มเลื่อนขึ้น-ลง */
    .dd-controls {
        display: flex;
        gap: 5px;
    }

.dd-btn-move {
        background: #E63946;
        color: white;
        border: none;
        border-radius: 6px;
        width: 30px;
        height: 30px;
        font-size: 1.1rem;
        cursor: pointer;
        box-shadow: 0 3px 0 #B31222;
        transition: all 0.1s;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .dd-btn-move:active {
        transform: translateY(3px);
        box-shadow: 0 0 0 #B31222;
    }
    .dd-btn-move:disabled {
        background: #FFCDD2;
        box-shadow: 0 3px 0 #EF9A9A;
        cursor: not-allowed;
        transform: none;
    }

/* ================= SweetAlert Customization ================= */
    .dd-swal-popup { background: #FFFFFF !important; border: 3px solid #780016 !important; border-radius: 15px !important; font-family: 'Prompt', sans-serif !important; }
    .dd-swal-title { color: #780016 !important; font-size: 22px !important; font-weight: 800 !important; }
    .dd-swal-html { color: #333 !important; font-size: 15px !important; }
    .dd-swal-confirm { background: #E63946 !important; color: #FFF !important; font-weight: bold !important; border-radius: 8px !important; box-shadow: 0 4px 0 #B31222 !important; }
</style>

<script>
    /* ==========================================
       Scoped JavaScript: Prefix dd_
       ========================================== */
    
    // ข้อมูลขั้นตอนที่ถูกต้อง (ซ่อน ID ไว้ตรวจคำตอบ ไม่แสดงตัวเลข)
    const dd_correctOrder = [
        { id: 1, text: "📱 เปิดแอปพลิเคชัน" },
        { id: 2, text: "🔍 ค้นหาร้านอาหารหรือเมนู" },
        { id: 3, text: "🍔 เพิ่มอาหารลงตะกร้า" },
        { id: 4, text: "📍 ระบุที่อยู่จัดส่ง" },
        { id: 5, text: "💳 ชำระเงิน" },
        { id: 6, text: "🛵 รอรับอาหาร" }
    ];

let dd_currentOrder = [];
    let dd_playerName = "";
    let dd_audioCtx = null;
    let dd_draggedIndex = null;

/* --- Audio System --- */
    function dd_initAudio() {
        if (!dd_audioCtx) dd_audioCtx = new (window.AudioContext || window.webkitAudioContext)();
        if (dd_audioCtx.state === 'suspended') dd_audioCtx.resume();
    }

function dd_playSound(type) {
        if (!dd_audioCtx) return;
        try {
            const osc = dd_audioCtx.createOscillator();
            const gain = dd_audioCtx.createGain();
            osc.connect(gain); gain.connect(dd_audioCtx.destination);
            const now = dd_audioCtx.currentTime;

if (type === 'click') {
                osc.type = 'sine'; osc.frequency.setValueAtTime(600, now); osc.frequency.exponentialRampToValueAtTime(1000, now + 0.1);
                gain.gain.setValueAtTime(0.2, now); gain.gain.exponentialRampToValueAtTime(0.01, now + 0.1);
                osc.start(now); osc.stop(now + 0.1);
            } else if (type === 'move') {
                osc.type = 'triangle'; osc.frequency.setValueAtTime(400, now); osc.frequency.exponentialRampToValueAtTime(450, now + 0.1);
                gain.gain.setValueAtTime(0.1, now); gain.gain.exponentialRampToValueAtTime(0.01, now + 0.1);
                osc.start(now); osc.stop(now + 0.1);
            } else if (type === 'correct') {
                osc.type = 'square'; [523.25, 659.25, 783.99].forEach((f, i) => osc.frequency.setValueAtTime(f, now + (i*0.1)));
                gain.gain.setValueAtTime(0.1, now); gain.gain.exponentialRampToValueAtTime(0.01, now + 0.4);
                osc.start(now); osc.stop(now + 0.4);
            } else if (type === 'wrong') {
                osc.type = 'sawtooth'; osc.frequency.setValueAtTime(200, now); osc.frequency.linearRampToValueAtTime(120, now + 0.3);
                gain.gain.setValueAtTime(0.15, now); gain.gain.linearRampToValueAtTime(0.01, now + 0.3);
                osc.start(now); osc.stop(now + 0.3);
            } else if (type === 'win') {
                osc.type = 'sine'; [523.25, 659.25, 783.99, 1046.50].forEach((f, i) => osc.frequency.setValueAtTime(f, now + (i*0.15)));
                gain.gain.setValueAtTime(0.2, now); gain.gain.linearRampToValueAtTime(0.01, now + 0.8);
                osc.start(now); osc.stop(now + 0.8);
            }
        } catch (e) { console.error(e); }
    }

/* --- Navigation & Flow --- */
    function dd_showScreen(id) {
        document.querySelectorAll('.dd-screen').forEach(s => s.classList.remove('dd-active'));
        document.getElementById(id).classList.add('dd-active');
    }

function dd_startGame() {
        dd_playSound('click');
        document.getElementById('dd-ui-name').innerText = dd_playerName;
        document.getElementById('dd-result-name').innerText = dd_playerName;
        
        // สุ่มลำดับอาเรย์จนกว่าจะผิดเพี้ยนไปจากความจริง
        dd_currentOrder = [...dd_correctOrder];
        do {
            dd_currentOrder.sort(() => Math.random() - 0.5);
        } while (dd_checkIfCorrect());

dd_renderList();
        dd_showScreen('dd-screen-game');
    }

/* --- Rendering & Logic --- */
    function dd_renderList() {
        const listElement = document.getElementById('dd-sortable-list');
        listElement.innerHTML = '';
        
        dd_currentOrder.forEach((item, index) => {
            const li = document.createElement('li');
            li.className = 'dd-sortable-item';
            li.draggable = true;
            li.dataset.index = index;

// ส่วนข้อความ
            const textDiv = document.createElement('div');
            textDiv.className = 'dd-item-text';
            textDiv.innerText = item.text;

// ปุ่มลูกศร
            const controlsDiv = document.createElement('div');
            controlsDiv.className = 'dd-controls';
            
            const btnUp = document.createElement('button');
            btnUp.className = 'dd-btn-move';
            btnUp.innerText = '⬆️';
            btnUp.disabled = index === 0;
            btnUp.onclick = () => dd_moveItem(index, -1);

const btnDown = document.createElement('button');
            btnDown.className = 'dd-btn-move';
            btnDown.innerText = '⬇️';
            btnDown.disabled = index === dd_currentOrder.length - 1;
            btnDown.onclick = () => dd_moveItem(index, 1);

controlsDiv.appendChild(btnUp);
            controlsDiv.appendChild(btnDown);

li.appendChild(textDiv);
            li.appendChild(controlsDiv);

// ผูก Events ของ Drag & Drop
            dd_addDragEvents(li, index);

listElement.appendChild(li);
        });
    }

function dd_moveItem(index, direction) {
        dd_initAudio();
        dd_playSound('move');
        
        // สลับใน Array
        const newIndex = index + direction;
        const temp = dd_currentOrder[index];
        dd_currentOrder[index] = dd_currentOrder[newIndex];
        dd_currentOrder[newIndex] = temp;
        
        dd_renderList();
    }

function dd_addDragEvents(item, index) {
        item.addEventListener('dragstart', (e) => {
            dd_initAudio();
            dd_draggedIndex = index;
            setTimeout(() => item.style.opacity = '0.5', 0);
        });

item.addEventListener('dragend', () => {
            item.style.opacity = '1';
            dd_draggedIndex = null;
            dd_renderList();
        });

item.addEventListener('dragover', (e) => {
            e.preventDefault();
            item.classList.add('dd-drag-over');
        });

item.addEventListener('dragleave', () => {
            item.classList.remove('dd-drag-over');
        });

item.addEventListener('drop', (e) => {
            e.preventDefault();
            item.classList.remove('dd-drag-over');
            
            const targetIndex = index;
            if (dd_draggedIndex !== null && dd_draggedIndex !== targetIndex) {
                dd_playSound('move');
                const [draggedItem] = dd_currentOrder.splice(dd_draggedIndex, 1);
                dd_currentOrder.splice(targetIndex, 0, draggedItem);
                dd_renderList();
            }
        });
    }

/* --- Validation --- */
    function dd_checkIfCorrect() {
        return dd_currentOrder.every((item, index) => item.id === dd_correctOrder[index].id);
    }

function dd_restartGame() {
        dd_playSound('click');
        dd_showScreen('dd-screen-start');
    }
</script>