multi-feature optimization

frontend/vehicles.html

@@ -1292,15 +1292,32 @@
             flowChart.update();
         }
 
+        let _alpha = 0.25;
+
         function updateCongestion(congestion, stride) {
-            const len = congestion.length;
+            let data = congestion;
+            // Apply EMA smoothing if alpha is less than 1 (1 = no smoothing)
+            if (_alpha < 0.99) {
+                data = [];
+                let s = congestion[0] || 0;
+                for (let v of congestion) {
+                    s = _alpha * v + (1 - _alpha) * s;
+                    data.push(s);
+                }
+            }
+
+            const len = data.length;
             if (len <= 200) {
-                congChart.data.labels = congestion.map((_, i) => i * stride);
-                congChart.data.datasets[0].data = congestion;
+                congChart.data.labels = data.map((_, i) => i * stride);
+                congChart.data.datasets[0].data = data;
             } else {
-                const step = 10;
+                // Dynamic sampling to keep chart performance high
+                const step = Math.ceil(len / 200);
                 const sampled = [], labels = [];
-                for (let i = 0; i < len; i += step) { labels.push(i * stride); sampled.push(congestion[i]); }
+                for (let i = 0; i < len; i += step) {
+                    labels.push(i * stride);
+                    sampled.push(data[i]);
+                }
                 congChart.data.labels = labels;
                 congChart.data.datasets[0].data = sampled;
             }
@@ -1348,6 +1365,7 @@
             const stride = parseInt(document.getElementById('sv-stride').textContent);
             const reportFmt = document.getElementById('sv-report').value;
             const annotated = document.getElementById('sv-annotated').classList.contains('active');
+            _alpha = parseFloat(document.getElementById('sv-smoothing').textContent) || 0.25;
 
             // Annotation Options
             const annotated_options = {
@@ -1481,7 +1499,30 @@
                         infoRow('Throughput (FPS)', d.actual_fps, 'Measured frame throughput during processing.', ' <span class="text-xs text-slate-400 font-normal">fps</span>') +
                         infoRow('Real-time Ratio', d.speed_vs_realtime + 'x', 'Processing speed relative to video playback rate.');
 
-                    if (d.video_id) loadReports(d.video_id);
+                    if (d.video_id) {
+                        loadReports(d.video_id);
+
+                        // Auto-Download Logic
+                        if (document.getElementById('sv-auto-download').classList.contains('active')) {
+                            console.log('[UrbanFlow] Auto-download triggered...');
+                            setTimeout(() => {
+                                fetch(`/reports_list/${d.video_id}`)
+                                    .then(r => r.json())
+                                    .then(res => {
+                                        const pdf = res.files.find(f => f.endsWith('.pdf'));
+                                        if (pdf) {
+                                            const link = document.createElement('a');
+                                            link.href = `/reports/${d.video_id}/${pdf}`;
+                                            link.download = pdf;
+                                            document.body.appendChild(link);
+                                            link.click();
+                                            document.body.removeChild(link);
+                                        }
+                                    })
+                                    .catch(err => console.error('[UrbanFlow] Auto-download failed:', err));
+                            }, 2500); // 2.5s buffer for PDF generation
+                        }
+                    }
 
                     // Show New Analysis button in Settings
                     const newWrap = document.getElementById('new-analysis-wrap');