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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Compare Two Images</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet">
    <style>
        .preset-image-container {
            width: 100%;
            overflow: hidden;
            margin-bottom: 10px;
        }
        .preset-image {
            width: 100%;
            height: auto;
            cursor: pointer;
            transition: transform 0.2s, border 0.2s;
            border: 2px solid transparent;
            border-radius: 8px;
        }
        .preset-image:hover {
            transform: scale(1.05);
        }
        .preset-image.selected {
            border-color: #0d6efd;
        }
        .dropzone {
            border: 2px dashed #ccc;
            padding: 20px;
            text-align: center;
            margin-top: 10px;
            border-radius: 8px;
            background-color: #f9f9f9;
        }
        .preview-image {
            width: 100%;
            max-width: 200px;
            height: auto;
            margin: 10px auto;
            display: block;
            border-radius: 8px;
            opacity: 0;
            transition: opacity 0.5s ease-in;
        }
        .preview-image.visible {
            opacity: 1;
        }
        .loading-container {
            text-align: center;
            margin-top: 20px;
        }
        .loading-text {
            margin-top: 10px;
            font-size: 18px;
            color: #555;
        }
        #compareSection {
            margin-top: 30px;
            text-align: center;
        }
        #results {
            margin-top: 20px;
        }
    </style>
</head>

<body>
<div class="container my-4">
    <h1 class="text-center">Compare Two Images</h1>

    <div class="row mt-4">
        <!-- Column 1: Original Image -->
        <div class="col-md-6">
            <h5 class="text-center">Select Original Image</h5>
            <div class="row">
                <div class="col-4">
                    <div class="preset-image-container">
                        <img id="preset-1-1" src="/static/marilyn_1.jpg" class="preset-image" onclick="selectPreset(1, 1)" alt="Original 1">
                    </div>
                </div>
                <div class="col-4">
                    <div class="preset-image-container">
                        <img id="preset-2-1" src="/static/star wars_1b.jpg" class="preset-image" onclick="selectPreset(2, 1)" alt="Original 2">
                    </div>
                </div>
                <div class="col-4">
                    <div class="preset-image-container">
                        <img id="preset-3-1" src="/static/muhammad ali_1.jpg" class="preset-image" onclick="selectPreset(3, 1)" alt="Original 3">
                    </div>
                </div>
            </div>
            <div class="dropzone" id="dropzone1">
                <p>Or drag and drop an image here</p>
                <input type="file" id="fileInput1" accept="image/*" hidden>
                <button class="btn btn-outline-primary" onclick="document.getElementById('fileInput1').click()">Upload Original</button>
            </div>
        </div>

        <!-- Column 2: AI Generated Image -->
        <div class="col-md-6">
            <h5 class="text-center">Select AI Generated Image</h5>
            <div class="row">
                <div class="col-4">
                    <div class="preset-image-container">
                        <img id="preset-1-2" src="/static/marilyn_2.png" class="preset-image" onclick="selectPreset(1, 2)" alt="AI 1">
                    </div>
                </div>
                <div class="col-4">
                    <div class="preset-image-container">
                        <img id="preset-2-2" src="/static/star wars_2b.png" class="preset-image" onclick="selectPreset(2, 2)" alt="AI 2">
                    </div>
                </div>
                <div class="col-4">
                    <div class="preset-image-container">
                        <img id="preset-3-2" src="/static/muhammad ali_2.png" class="preset-image" onclick="selectPreset(3, 2)" alt="AI 3">
                    </div>
                </div>
            </div>
            <div class="dropzone" id="dropzone2">
                <p>Or drag and drop an image here</p>
                <input type="file" id="fileInput2" accept="image/*" hidden>
                <button class="btn btn-outline-primary" onclick="document.getElementById('fileInput2').click()">Upload AI Image</button>
            </div>
        </div>
    </div>

    <!-- Section for Preview + Compare Button + Distance -->
    <div id="compareSection" class="d-flex justify-content-center align-items-center flex-column" style="display: none;">
        <div class="d-flex justify-content-around align-items-center w-100">
            <img id="previewImage1" class="preview-image" alt="Original Preview">
            <div id="compareButtonContainer"></div>
            <img id="previewImage2" class="preview-image" alt="AI Preview">
        </div>
        <div id="results"></div>
    </div>

</div>

<!-- Scripts -->
<script>
    let file1 = null;
    let file2 = null;

    function resetSelection(target) {
        for (let i = 1; i <= 3; i++) {
            const img = document.getElementById(`preset-${i}-${target}`);
            if (img) img.classList.remove('selected');
        }
    }



    function selectPreset(presetNumber, target) {
    const imgElement = document.getElementById(`preset-${presetNumber}-${target}`);
    const imagePath = imgElement.getAttribute('src'); // Récupère le chemin exact
    const fileName = imagePath.split('/').pop();      // Extrait le nom du fichier

    fetch(imagePath)
        .then(res => {
            if (!res.ok) throw new Error(`Impossible de charger ${fileName}`);
            return res.blob();
        })
        .then(blob => {
            const file = new File([blob], fileName, { type: blob.type });
            if (target === 1) {
                file1 = file;
                updatePreview(blob, 1);
                resetSelection(1);
                imgElement.classList.add('selected');
            } else {
                file2 = file;
                updatePreview(blob, 2);
                resetSelection(2);
                imgElement.classList.add('selected');
            }
        })
        .catch(err => {
            console.error('Erreur de chargement de l’image :', err);
            alert(err.message);
        })
        .then(() => checkReadyToCompare());
}


    function updatePreview(blob, target) {
        const reader = new FileReader();
        reader.onload = (event) => {
            if (target === 1) {
                document.getElementById('previewImage1').src = event.target.result;
                document.getElementById('previewImage1').classList.add('visible');
            } else {
                document.getElementById('previewImage2').src = event.target.result;
                document.getElementById('previewImage2').classList.add('visible');
            }
            document.getElementById('compareSection').style.display = 'flex';
        };
        reader.readAsDataURL(blob);
    }

    document.getElementById('fileInput1').addEventListener('change', (e) => {
        file1 = e.target.files[0];
        updatePreview(file1, 1);
        resetSelection(1);
        checkReadyToCompare();
    });

    document.getElementById('fileInput2').addEventListener('change', (e) => {
        file2 = e.target.files[0];
        updatePreview(file2, 2);
        resetSelection(2);
        checkReadyToCompare();
    });

    function checkReadyToCompare() {
        const container = document.getElementById('compareButtonContainer');
        if (file1 && file2) {
            container.innerHTML = `
                <button class="btn btn-primary" onclick="processImages()">Compare</button>
            `;
        } else {
            container.innerHTML = '';
        }
    }

    async function processImages() {
        if (!file1 || !file2) {
            alert('Please select two images first!');
            return;
        }

        const formData = new FormData();
        formData.append('image1', file1);
        formData.append('image2', file2);

        const resultsDiv = document.getElementById('results');
        resultsDiv.innerHTML = `
            <div class="loading-container">
                <div class="spinner-border text-primary" role="status"></div>
                <div class="loading-text">Processing...</div>
            </div>`;

        try {
            const response = await fetch('/process', {
                method: 'POST',
                body: formData
            });

            if (!response.ok) throw new Error(`HTTP error! status: ${response.status}`);
            const data = await response.json();

            if (data.distance !== undefined) {
                resultsDiv.innerHTML = `
                    <div class="card mt-3 p-4 text-center">
                        <h4>Euclidean Distance</h4>
                        <p class="display-6">${data.distance.toFixed(4)}</p>
                    </div>`;
            } else {
                throw new Error('Invalid server response.');
            }
        } catch (error) {
            console.error('Error:', error);
            resultsDiv.innerHTML = `
                <div class="alert alert-danger" role="alert">
                    ${error.message}
                </div>`;
        }
    }
</script>

<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js"></script>
</body>
</html>