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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>RetiCheck | AI Diagnosis Portal</title>
    
    <link rel="manifest" href="/static/manifest.json">
    <meta name="theme-color" content="#38bdf8">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <style>
        * { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Poppins', sans-serif; }
        
        body { 
            background: radial-gradient(circle at top left, #1e293b, #0f172a); 
            min-height: 100vh; 
            color: white; 
            display: flex; flex-direction: column; align-items: center; justify-content: center;
            padding: 30px; 
        }

        .header { text-align: center; margin-bottom: 30px; animation: fadeInDown 1s ease; }
        .logo { font-size: 36px; font-weight: 800; letter-spacing: 1px; }
        .logo span { background: linear-gradient(90deg, #00f2fe, #4facfe); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .subtitle { color: #94a3b8; font-size: 16px; margin-top: 5px; }

        .glass-card {
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 30px;
            padding: 50px 40px;
            width: 100%;
            max-width: 550px;
            text-align: center;
            box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5);
            animation: fadeInUp 1s ease;
        }

        .upload-zone {
            width: 100%;
            height: 320px;
            background: rgba(0,0,0,0.2);
            border-radius: 25px;
            margin-bottom: 30px;
            position: relative;
            overflow: hidden;
            border: 2px dashed #334155;
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .upload-zone:hover {
            border-color: #00f2fe;
            background: rgba(0, 242, 254, 0.05);
            transform: translateY(-5px);
        }

        .upload-placeholder {
            text-align: center;
            transition: 0.3s;
        }

        .upload-icon {
            font-size: 60px;
            color: #00f2fe;
            margin-bottom: 20px;
            animation: float 3s ease-in-out infinite;
        }

        .upload-text { color: #cbd5e1; font-size: 18px; font-weight: 600; }
        .upload-subtext { color: #64748b; font-size: 14px; margin-top: 8px; }

        #preview-img { 
            width: 100%; height: 100%; object-fit: cover; display: none; border-radius: 25px;
        }

        .scan-line {
            position: absolute; top: 0; width: 100%; height: 4px;
            background: #00f2fe; box-shadow: 0 0 30px #00f2fe, 0 0 10px #00f2fe;
            display: none; z-index: 5;
        }
        @keyframes scanning { 0% { top: 0; opacity: 0; } 50% { opacity: 1; } 100% { top: 100%; opacity: 0; } }
        @keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
        @keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
        @keyframes fadeInDown { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }


        .analyze-btn {
            width: 100%;
            padding: 20px;
            background: linear-gradient(90deg, #00f2fe, #4facfe);
            color: #0f172a;
            border: none;
            border-radius: 15px;
            font-size: 18px;
            font-weight: 800;
            letter-spacing: 1px;
            cursor: pointer;
            box-shadow: 0 10px 30px -10px rgba(0, 242, 254, 0.5);
            transition: 0.3s;
            display: flex; justify-content: center; align-items: center; gap: 10px;
        }
        
        .analyze-btn:hover { transform: translateY(-3px); box-shadow: 0 15px 35px -10px rgba(0, 242, 254, 0.6); }
        .analyze-btn:disabled { opacity: 0.7; cursor: not-allowed; transform: none; }

        .loading-container { display: none; margin-top: 30px; }
        .progress-bar { background: #1e293b; height: 8px; border-radius: 10px; margin-top: 15px; overflow: hidden; position: relative; }
        .progress-fill { height: 100%; width: 0%; background: linear-gradient(90deg, #00f2fe, #4facfe); transition: width 0.2s ease-in-out; border-radius: 10px; }
        .status-text-container { display: flex; justify-content: space-between; font-size: 14px; font-weight: 600; }
    </style>
</head>
<body>

    <div class="header">
        <div class="logo">RetiCheck <span>AI</span></div>
        <p class="subtitle">Advanced Retinal Disease Screening Portal</p>
    </div>

    <div class="glass-card">
        
        <label for="fileInput" class="upload-zone" id="dropZone">
            <div id="scan-line" class="scan-line"></div>
            
            <div class="upload-placeholder" id="placeholderContent">
                <i class="fa-solid fa-cloud-arrow-up upload-icon"></i>
                <p class="upload-text">Click to Upload Retinal Scan</p>
                <p class="upload-subtext">Supports JPG, PNG (Max 10MB)</p>
            </div>

            <img id="preview-img">
        </label>

        <input type="file" id="fileInput" style="display: none;" accept="image/*" onchange="previewFile()">

        <button class="analyze-btn" id="analyzeBtn" onclick="runFullAnalysis()">
            <i class="fa-solid fa-microchip"></i> START AI DIAGNOSIS
        </button>

        <button class="analyze-btn" style="background: #1e293b; color: #00f2fe; margin-top: 15px;" onclick="openDatabase()">
            <i class="fa-solid fa-lock"></i> VIEW PATIENT DATABASE
        </button>
        <div class="loading-container" id="loadingArea">
            <div class="status-text-container">
                <span style="color: #00f2fe;">Processing Image...</span>
                <span id="progressPercent" style="color: #94a3b8;">0%</span>
            </div>
            <div class="progress-bar">
                <div class="progress-fill" id="pFill"></div>
            </div>
        </div>
    </div>

    <script>
        const previewImg = document.getElementById('preview-img');
        const placeholderContent = document.getElementById('placeholderContent');
        const dropZone = document.getElementById('dropZone');
        const scanLine = document.getElementById('scan-line');
        const pFill = document.getElementById('pFill');
        const progressPercent = document.getElementById('progressPercent');
        const loadingArea = document.getElementById('loadingArea');
        const analyzeBtn = document.getElementById('analyzeBtn');
        const fileInput = document.getElementById('fileInput');

        function previewFile() {
            const file = fileInput.files[0];
            if (!file) return;

            const reader = new FileReader();
            reader.onloadend = () => {
                placeholderContent.style.display = 'none'; 
                previewImg.style.display = 'block'; 
                previewImg.src = reader.result;
                dropZone.style.borderColor = '#00f2fe';
                dropZone.style.boxShadow = '0 0 20px rgba(0, 242, 254, 0.2)';
            }
            reader.readAsDataURL(file);
        }

        async function runFullAnalysis() {
            if (!fileInput.files.length) {
                alert("⚠️ Please upload a retinal scan image first.");
                dropZone.style.animation = 'shake 0.5s';
                setTimeout(() => dropZone.style.animation = '', 500);
                return;
            }

            loadingArea.style.display = 'block';
            scanLine.style.display = 'block';
            scanLine.style.animation = 'scanning 1.5s infinite ease-in-out';
            analyzeBtn.innerHTML = '<i class="fa-solid fa-circle-notch fa-spin"></i> Analyzing...';
            analyzeBtn.disabled = true;
            dropZone.style.pointerEvents = 'none'; 

            let progress = 0;
            let progressInterval = setInterval(() => {
                if(progress < 95) { 
                    progress += Math.floor(Math.random() * 5) + 1;
                    if(progress > 95) progress = 95;
                    pFill.style.width = progress + "%";
                    progressPercent.innerText = progress + "%";
                }
            }, 150);

            const formData = new FormData();
            formData.append('image', fileInput.files[0]);

            try {
                let response = await fetch('/predict', { method: 'POST', body: formData });
                let data = await response.json();
                
                localStorage.setItem('aiResult', JSON.stringify(data));

                clearInterval(progressInterval);
                pFill.style.width = "100%";
                progressPercent.innerText = "100% - Complete";
                
                setTimeout(() => { window.location.href = "/result"; }, 800);

            } catch (error) {
                clearInterval(progressInterval);
                alert("❌ Error connecting to AI Server! Is Flask running?");
                analyzeBtn.innerHTML = '<i class="fa-solid fa-microchip"></i> START AI DIAGNOSIS';
                analyzeBtn.disabled = false;
                loadingArea.style.display = 'none';
                scanLine.style.display = 'none';
                dropZone.style.pointerEvents = 'auto';
            }
        }

        // --- PUDHU CODE: செக்யூரிட்டி லாக் மேஜிக் 👇 ---
        function openDatabase() {
            // ஒரு பாக்ஸ் வந்து PIN கேட்கும்
            let pin = prompt("🔒 SECURE ACCESS\n\nPlease enter the Doctor's PIN to view patient records:");
            
            // PIN கரெக்ட்டா 1234 னு இருந்தா உள்ளே போகும்
            if (pin === "1234") {
                window.location.href = '/database';
            } 
            // தப்பா இருந்தா எரர் காட்டும்
            else if (pin !== null && pin !== "") {
                alert("❌ Incorrect PIN! Access Denied.");
            }
        }
        // --- PUDHU CODE END 👆 ---
    </script>
    <style>
        @keyframes shake { 0% { transform: translateX(0); } 25% { transform: translateX(-10px); } 50% { transform: translateX(10px); } 75% { transform: translateX(-10px); } 100% { transform: translateX(0); } }
    </style>
</body>
</html>