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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>Dark Store Placement & Heatmap</title>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css">
    <link rel="stylesheet" href="https://unpkg.com/leaflet/dist/leaflet.css" />
    <style>
        body {
            font-family: 'Poppins', sans-serif;
            background: url('https://wallpapercave.com/wp/wp4411792.jpg') no-repeat center center fixed;
            background-size: cover;
            color: #ffffff;
            margin: 0;
            padding: 0;
        }
        .container {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(15px);
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
            text-align: center;
            max-width: 900px;
            margin: 40px auto;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        h2 {
            font-weight: 600;
            text-transform: uppercase;
            background: linear-gradient(90deg, #ff416c, #ff4b2b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .file-upload {
            position: relative;
            display: inline-block;
        }
        .file-upload input[type="file"] {
            position: absolute;
            opacity: 0;
            width: 100%;
            height: 100%;
            cursor: pointer;
        }
        .file-upload label {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 12px 20px;
            background: linear-gradient(135deg, #007bff, #00d4ff);
            color: #fff;
            font-weight: 600;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }
        .btn {
            padding: 12px 24px;
            font-size: 16px;
            font-weight: 600;
            border-radius: 8px;
            text-transform: uppercase;
            transition: all 0.3s ease-in-out;
            cursor: pointer;
        }
        .btn-primary {
            background: linear-gradient(135deg, #007bff, #00d4ff);
            color: #fff;
        }
        .btn-danger {
            background: linear-gradient(135deg, #ff416c, #ff4b2b);
            color: #fff;
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
        }
        #map, #heatmap {
            height: 500px;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
            margin-top: 20px;
        }
    </style>
</head>
<body>
    <div class="container mt-4">
        <h2 class="text-center"> Dark Store Placement & Heatmap</h2>
        
        <div class="mb-3">
            <label class="form-label">Upload CSV File (Latitude, Longitude, Location)</label>
            <div class="file-upload">
                <input type="file" id="csvFileInput">
                <label for="csvFileInput">Choose File</label>
            </div>
        </div>

        <div class="d-flex justify-content-center gap-3">
            <button class="btn btn-primary" onclick="processCSV()">Generate Store Map</button>
            <button class="btn btn-danger" onclick="generateHeatmap()">Generate Heatmap</button>
        </div>

        <div id="map" class="mt-4"></div>
        <h3 class="text-center mt-4">🔥 Heatmap Representation</h3>
        <div id="heatmap" class="mt-2"></div>
    </div>

    <script src="https://unpkg.com/leaflet/dist/leaflet.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/PapaParse/5.3.2/papaparse.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet.heat/0.2.0/leaflet-heat.js"></script>
    
    <script>
        let map = L.map('map').setView([18.5204, 73.8567], 10);
        L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png').addTo(map);
        
        let heatmapMap = L.map('heatmap').setView([18.5204, 73.8567], 10);
        L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png').addTo(heatmapMap);
        
        let selectedLocations = [];
        let heatLayer;

        function processCSV() {
            const fileInput = document.getElementById("csvFileInput");
            if (!fileInput.files.length) return alert("Please upload a CSV file");
            
            Papa.parse(fileInput.files[0], {
                header: true,
                skipEmptyLines: true,
                complete: function (result) {
                    let data = result.data;
                    selectedLocations = [];

                    data.forEach(row => {
                        let lat = parseFloat(row.Latitude);
                        let lon = parseFloat(row.Longitude);
                        let location = row.Location;

                        selectedLocations.push([lat, lon, 1.0]);
                        L.marker([lat, lon]).addTo(map)
                            .bindPopup(`<b>${location}</b><br>Lat: ${lat}, Lon: ${lon}`);
                    });
                }
            });
        }

        function generateHeatmap() {
            if (heatLayer) heatmapMap.removeLayer(heatLayer);

            heatLayer = L.heatLayer(selectedLocations, {
                radius: 25,
                blur: 15,
                maxZoom: 10
            }).addTo(heatmapMap);
        }
    </script>
</body>
</html>