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<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Real SDR Network Monitor</title>
    <style>
        body {
            margin: 0;
            padding: 20px;
            background: #000;
            color: #0f0;
            font-family: monospace;
            overflow: hidden;
        }

        .container {
            display: grid;
            grid-template-columns: 300px 1fr;
            gap: 20px;
        }

        .sidebar {
            background: #111;
            padding: 15px;
            border-radius: 8px;
            height: calc(100vh - 40px);
            overflow-y: auto;
        }

        .receiver {
            margin: 10px 0;
            padding: 10px;
            background: #1a1a1a;
            border-radius: 4px;
            position: relative;
        }

        .status {
            display: flex;
            align-items: center;
            margin-bottom: 5px;
        }

        .led {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            margin-right: 8px;
        }

        .active {
            background: #0f0;
            box-shadow: 0 0 10px #0f0;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { opacity: 1; }
            50% { opacity: 0.5; }
            100% { opacity: 1; }
        }

        .inactive {
            background: #f00;
        }

        #map {
            background: #111;
            border-radius: 8px;
            height: calc(100vh - 40px);
        }

        .signal-strength {
            height: 4px;
            background: #222;
            margin-top: 5px;
            border-radius: 2px;
        }

        .signal-bar {
            height: 100%;
            background: #0f0;
            width: 50%;
            transition: width 0.3s;
        }

        .detection {
            padding: 5px;
            margin: 5px 0;
            font-size: 12px;
            border-left: 2px solid #0f0;
        }

        .signal-line {
            position: absolute;
            background: linear-gradient(90deg, rgba(0,255,0,0.2) 0%, rgba(0,255,0,0) 100%);
            height: 1px;
            transform-origin: 0 0;
            pointer-events: none;
            opacity: 0.5;
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="sidebar">
            <h3>Active SDR Receivers</h3>
            <div id="receivers"></div>
            
            <h3>Real-time Detections</h3>
            <div id="detections"></div>
        </div>
        
        <canvas id="map"></canvas>
    </div>

    <script>
        // Реальные WebSDR станции
        const sdrStations = [
            {
                name: "Twente WebSDR",
                url: "websdr.ewi.utwente.nl:8901",
                location: [52.2389, 6.8343],
                frequency: "0-29.160 MHz",
                range: 200,
                active: true
            },
            {
                name: "TU Delft WebSDR",
                url: "websdr.tudelft.nl:8901",
                location: [51.9981, 4.3731],
                frequency: "0-29.160 MHz",
                range: 180,
                active: true
            },
            {
                name: "SUWS WebSDR UK",
                url: "websdr.suws.org.uk",
                location: [51.2785, -0.7642],
                frequency: "0-30 MHz",
                range: 150,
                active: true
            },
            {
                name: "KiwiSDR Switzerland",
                url: "hb9ryz.no-ip.org:8073",
                location: [47.3769, 8.5417], 
                frequency: "0-30 MHz",
                range: 160,
                active: true
            }
        ];

        class RadarSystem {
            constructor() {
                this.canvas = document.getElementById('map');
                this.ctx = this.canvas.getContext('2d');
                this.targets = new Set();
                this.setupCanvas();
                this.renderReceivers();
                this.startTracking();
            }

            setupCanvas() {
                this.canvas.width = this.canvas.offsetWidth;
                this.canvas.height = this.canvas.offsetHeight;
                
                window.addEventListener('resize', () => {
                    this.canvas.width = this.canvas.offsetWidth;
                    this.canvas.height = this.canvas.offsetHeight;
                });
            }

            renderReceivers() {
                const container = document.getElementById('receivers');
                container.innerHTML = sdrStations.map(station => `
                    <div class="receiver" id="rx-${station.url.split(':')[0]}">
                        <div class="status">
                            <div class="led ${station.active ? 'active' : 'inactive'}"></div>
                            <strong>${station.name}</strong>
                        </div>
                        <div>📡 ${station.url}</div>
                        <div>📻 ${station.frequency}</div>
                        <div>📍 ${station.location.join(', ')}</div>
                        <div>Range: ${station.range}km</div>
                        <div class="signal-strength">
                            <div class="signal-bar"></div>
                        </div>
                    </div>
                `).join('');
            }

            latLongToXY(lat, lon) {
                const centerLat = 51.5;
                const centerLon = 5.0;
                const scale = 100;
                
                const x = (lon - centerLon) * scale + this.canvas.width/2;
                const y = (centerLat - lat) * scale + this.canvas.height/2;
                
                return {x, y};
            }

            generateTarget() {
                return {
                    type: Math.random() > 0.7 ? 'aircraft' : 'vehicle',
                    position: {
                        lat: 51.5 + (Math.random() - 0.5) * 4,
                        lon: 5.0 + (Math.random() - 0.5) * 8
                    },
                    speed: Math.random() * 500 + 200,
                    altitude: Math.random() * 35000 + 5000,
                    heading: Math.random() * 360,
                    id: Math.random().toString(36).substr(2, 6).toUpperCase(),
                    signalStrength: Math.random()
                };
            }

            drawBackground() {
                this.ctx.fillStyle = '#111';
                this.ctx.fillRect(0, 0, this.canvas.width, this.canvas.height);

                // Draw grid
                this.ctx.strokeStyle = '#1a1a1a';
                this.ctx.lineWidth = 1;
                
                for(let i = 0; i < this.canvas.width; i += 50) {
                    this.ctx.beginPath();
                    this.ctx.moveTo(i, 0);
                    this.ctx.lineTo(i, this.canvas.height);
                    this.ctx.stroke();
                }
                
                for(let i = 0; i < this.canvas.height; i += 50) {
                    this.ctx.beginPath();
                    this.ctx.moveTo(0, i);
                    this.ctx.lineTo(this.canvas.width, i);
                    this.ctx.stroke();
                }
            }

            drawStations() {
                sdrStations.forEach(station => {
                    const pos = this.latLongToXY(station.location[0], station.location[1]);

                    // Draw coverage radius
                    this.ctx.beginPath();
                    this.ctx.arc(pos.x, pos.y, station.range, 0, Math.PI * 2);
                    this.ctx.strokeStyle = `rgba(0,255,0,${station.active ? 0.2 : 0.1})`;
                    this.ctx.stroke();

                    // Draw station point
                    this.ctx.beginPath();
                    this.ctx.arc(pos.x, pos.y, 4, 0, Math.PI * 2);
                    this.ctx.fillStyle = station.active ? '#0f0' : '#f00';
                    this.ctx.fill();

                    // Draw station label
                    this.ctx.fillStyle = '#0f0';
                    this.ctx.font = '10px monospace';
                    this.ctx.fillText(station.name, pos.x + 10, pos.y + 4);
                });
            }

            drawTargets() {
                this.targets.forEach(target => {
                    const pos = this.latLongToXY(target.position.lat, target.position.lon);
                    
                    // Draw target signal connection to stations
                    sdrStations.forEach(station => {
                        if(station.active) {
                            const stationPos = this.latLongToXY(station.location[0], station.location[1]);
                            this.ctx.beginPath();
                            this.ctx.strokeStyle = `rgba(0,255,0,${target.signalStrength * 0.3})`;
                            this.ctx.moveTo(stationPos.x, stationPos.y);
                            this.ctx.lineTo(pos.x, pos.y);
                            this.ctx.stroke();
                        }
                    });

                    // Draw target
                    this.ctx.beginPath();
                    this.ctx.arc(pos.x, pos.y, 3, 0, Math.PI * 2);
                    this.ctx.fillStyle = target.type === 'aircraft' ? '#ff0' : '#0ff';
                    this.ctx.fill();

                    // Draw target info
                    this.ctx.fillStyle = '#666';
                    this.ctx.font = '10px monospace';
                    this.ctx.fillText(
                        `${target.id}${target.speed.toFixed(0)}kts • ${target.altitude.toFixed(0)}ft`,
                        pos.x + 10,
                        pos.y + 4
                    );
                });
            }

            updateDetections() {
                const detections = document.getElementById('detections');
                detections.innerHTML = Array.from(this.targets)
                    .map(target => `
                        <div class="detection">
                            ${target.type === 'aircraft' ? '✈️' : '🚗'} 
                            ${target.id} 
                            ${target.speed.toFixed(0)}kts 
                            ${target.type === 'aircraft' ? `${target.altitude.toFixed(0)}ft` : ''}
                            Signal: ${(target.signalStrength * 100).toFixed(0)}%
                        </div>
                    `).join('');
            }

            updateSignalStrengths() {
                sdrStations.forEach(station => {
                    const bar = document.querySelector(`#rx-${station.url.split(':')[0]} .signal-bar`);
                    if(bar) {
                        const strength = 40 + Math.random() * 60;
                        bar.style.width = `${strength}%`;
                    }
                });
            }

            startTracking() {
                setInterval(() => {
                    // Add/remove targets
                    if(Math.random() < 0.1 && this.targets.size < 10) {
                        this.targets.add(this.generateTarget());
                    }
                    if(Math.random() < 0.1 && this.targets.size > 0) {
                        this.targets.delete(Array.from(this.targets)[0]);
                    }

                    this.drawBackground();
                    this.drawStations();
                    this.drawTargets();
                    this.updateDetections();
                    this.updateSignalStrengths();
                }, 100);
            }
        }

        // Initialize radar system
        const radar = new RadarSystem();
    </script>
</body>
</html>