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<!DOCTYPE html>
<html lang="th">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>ระบบตรวจสอบภาพโปรโมทงานออนไลน์</title>
    <style>
        * { box-sizing: border-box; font-family: 'Sukhumvit Set', 'Kanit', sans-serif; margin: 0; padding: 0; }
        body { background: #0f172a; color: #f8fafc; display: flex; justify-content: center; align-items: center; min-height: 100vh; padding: 20px; }
        .card { background: #1e293b; border-radius: 16px; padding: 28px; width: 100%; max-width: 480px; box-shadow: 0 10px 25px rgba(0,0,0,0.5); border: 1px solid #334155; text-align: center; }
        h1 { font-size: 1.5rem; margin-bottom: 8px; color: #38bdf8; }
        p.subtitle { font-size: 0.9rem; color: #94a3b8; margin-bottom: 24px; }
        
        .upload-box { border: 2px dashed #475569; border-radius: 12px; padding: 24px; cursor: pointer; transition: 0.2s; background: #0f172a; position: relative; }
        .upload-box:hover { border-color: #38bdf8; }
        .upload-box input { display: none; }
        .upload-icon { font-size: 2.5rem; color: #94a3b8; margin-bottom: 8px; }
        
        #preview-img { max-width: 100%; max-height: 200px; border-radius: 8px; margin-top: 12px; display: none; }
        
        button.btn-main { width: 100%; background: #0284c7; color: white; border: none; padding: 14px; border-radius: 10px; font-size: 1rem; font-weight: bold; margin-top: 20px; cursor: pointer; transition: 0.2s; }
        button.btn-main:hover { background: #0369a1; }
        button.btn-main:disabled { background: #475569; cursor: not-allowed; }

        .result-box { margin-top: 24px; padding: 16px; border-radius: 12px; display: none; text-align: center; }
        .result-scam { background: #450a0a; border: 1px solid #dc2626; color: #fca5a5; }
        .result-safe { background: #064e3b; border: 1px solid #10b981; color: #a7f3d0; }
        .result-unknown { background: #1e293b; border: 1px solid #64748b; color: #cbd5e1; }
        .result-title { font-size: 1.4rem; font-weight: bold; margin-bottom: 4px; }
        .result-detail { font-size: 0.85rem; opacity: 0.9; margin-bottom: 12px; }

        .vote-section { margin-top: 16px; padding-top: 12px; border-top: 1px solid rgba(255,255,255,0.1); display: flex; flex-direction: column; gap: 8px; align-items: center; }
        .vote-text { font-size: 0.85rem; color: #94a3b8; }
        .vote-buttons { display: flex; gap: 12px; width: 100%; justify-content: center; }
        .vote-btn { flex: 1; padding: 8px 12px; border-radius: 8px; border: none; font-weight: bold; cursor: pointer; transition: 0.2s; display: flex; align-items: center; justify-content: center; gap: 6px; }
        .vote-like { background: #15803d; color: white; }
        .vote-like:hover { background: #166534; }
        .vote-dislike { background: #b91c1c; color: white; }
        .vote-dislike:hover { background: #991b1b; }
        .vote-btn:disabled { opacity: 0.5; cursor: not-allowed; }
    </style>
</head>
<body>

<div class="card">
    <h1>🔍 ตรวจสอบภาพงานออนไลน์</h1>
    <p class="subtitle">อัปโหลดภาพโปรโมทเพื่อเช็คประวัติมิจฉาชีพ</p>

    <div class="upload-box" onclick="document.getElementById('fileInput').click()">
        <div class="upload-icon">📁</div>
        <span id="upload-text">แตะเพื่อเลือกรูปภาพ</span>
        <input type="file" id="fileInput" accept="image/*" onchange="handleFileSelect(event)">
        <img id="preview-img" alt="Preview">
    </div>

    <button id="checkBtn" class="btn-main" onclick="uploadAndCheck()" disabled>เช็ครูปภาพนี้</button>

    <div id="resultBox" class="result-box">
        <div id="resultTitle" class="result-title"></div>
        <div id="resultDetail" class="result-detail"></div>

        <div id="voteSection" class="vote-section">
            <span class="vote-text">ช่วยยืนยันความถูกต้องของภาพนี้:</span>
            <div class="vote-buttons">
                <button id="likeBtn" class="vote-btn vote-like" onclick="submitVote('like')">
                    👍 ไกลก์ (<span id="likeCount">0</span>)
                </button>
                <button id="dislikeBtn" class="vote-btn vote-dislike" onclick="submitVote('dislike')">
                    👎 เดดไลก์ (<span id="dislikeCount">0</span>)
                </button>
            </div>
        </div>
    </div>
</div>

<script>
    let selectedFile = null;
    let currentImageHash = null;

    function getUserId() {
        let uid = localStorage.getItem('scam_checker_uid');
        if (!uid) {
            uid = 'uid_' + Math.random().toString(36).substring(2) + Date.now().toString(36);
            localStorage.setItem('scam_checker_uid', uid);
        }
        return uid;
    }

    function handleFileSelect(event) {
        const file = event.target.files[0];
        if (file) {
            selectedFile = file;
            const reader = new FileReader();
            reader.onload = function(e) {
                const img = document.getElementById('preview-img');
                img.src = e.target.result;
                img.style.display = 'block';
                document.getElementById('upload-text').innerText = 'เปลี่ยนรูปภาพ';
                document.getElementById('checkBtn').disabled = false;
            };
            reader.readAsDataURL(file);
        }
    }

    async function uploadAndCheck() {
        if (!selectedFile) return;

        const btn = document.getElementById('checkBtn');
        const resultBox = document.getElementById('resultBox');
        btn.disabled = true;
        btn.innerText = 'กำลังตรวจสอบ...';
        resultBox.style.display = 'none';

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

        try {
            const res = await fetch('/check', {
                method: 'POST',
                body: formData
            });
            const data = await res.json();

            if (data.error) {
                alert(data.error);
                return;
            }

            currentImageHash = data.image_hash;
            updateResultUI(data);

        } catch (err) {
            alert('เกิดข้อผิดพลาดในการเชื่อมต่อเซิร์ฟเวอร์');
        } finally {
            btn.disabled = false;
            btn.innerText = 'เช็ครูปภาพนี้';
        }
    }

    function updateResultUI(data) {
        const resultBox = document.getElementById('resultBox');
        const resultTitle = document.getElementById('resultTitle');
        const resultDetail = document.getElementById('resultDetail');
        const likeCount = document.getElementById('likeCount');
        const dislikeCount = document.getElementById('dislikeCount');

        resultBox.style.display = 'block';
        
        if (data.result === 'ปลอดภัย') {
            resultBox.className = 'result-box result-safe';
            resultTitle.innerText = '✅ ' + data.result;
        } else if (data.is_scam) {
            resultBox.className = 'result-box result-scam';
            resultTitle.innerText = '⚠️ ' + data.result;
        } else {
            resultBox.className = 'result-box result-unknown';
            resultTitle.innerText = '❓ ' + data.result;
        }

        resultDetail.innerText = data.detail || '';
        likeCount.innerText = data.likes || 0;
        dislikeCount.innerText = data.dislikes || 0;

        document.getElementById('likeBtn').disabled = false;
        document.getElementById('dislikeBtn').disabled = false;
    }

    async function submitVote(voteType) {
        if (!currentImageHash) return;

        const likeBtn = document.getElementById('likeBtn');
        const dislikeBtn = document.getElementById('dislikeBtn');
        likeBtn.disabled = true;
        dislikeBtn.disabled = true;

        const formData = new FormData();
        formData.append('image_hash', currentImageHash);
        formData.append('vote_type', voteType);
        formData.append('user_id', getUserId());

        try {
            const res = await fetch('/vote', {
                method: 'POST',
                body: formData
            });
            const data = await res.json();

            if (data.success) {
                updateResultUI(data);
            } else {
                alert(data.error || 'ไม่สามารถบันทึกการโหวตได้');
            }
        } catch (err) {
            alert('เกิดข้อผิดพลาดในการเชื่อมต่อเซิร์ฟเวอร์');
        }
    }
</script>

</body>
</html>