Initial commit

src/components/Analysis/TrendChart.jsx

@@ -0,0 +1,59 @@
+import React from 'react';
+
+export default function TrendChart({ trendSeries = [] }) {
+  if (trendSeries.length < 2) {
+    return (
+      <div className="rounded-2xl border border-dashed border-gray-300 dark:border-gray-700 bg-white/70 dark:bg-gray-900/70 p-4 text-sm text-gray-600 dark:text-gray-300">
+        Für den Trend werden mindestens 2 Assessments benötigt.
+      </div>
+    );
+  }
+
+  const width = 760;
+  const height = 280;
+  const left = 50;
+  const right = 20;
+  const top = 16;
+  const bottom = 52;
+
+  const values = trendSeries.map((entry) => entry.totalPoints);
+  const minValue = Math.min(...values);
+  const maxValue = Math.max(...values);
+  const range = maxValue - minValue || 1;
+
+  const innerWidth = width - left - right;
+  const innerHeight = height - top - bottom;
+
+  const points = trendSeries.map((entry, index) => {
+    const x = left + (index / (trendSeries.length - 1)) * innerWidth;
+    const normalized = (entry.totalPoints - minValue) / range;
+    const y = top + innerHeight - normalized * innerHeight;
+    return { ...entry, x, y };
+  });
+
+  const path = points.map((point, index) => `${index === 0 ? 'M' : 'L'}${point.x},${point.y}`).join(' ');
+
+  return (
+    <div className="rounded-2xl border border-gray-200 dark:border-gray-800 bg-white dark:bg-gray-900 p-4 shadow-sm">
+      <h3 className="text-sm font-semibold text-gray-800 dark:text-gray-100 mb-3">Trend (Gesamtpunkte)</h3>
+      <svg viewBox={`0 0 ${width} ${height}`} className="w-full h-auto" role="img" aria-label="Trenddiagramm">
+        <line x1={left} y1={top} x2={left} y2={top + innerHeight} className="stroke-gray-300 dark:stroke-gray-700" strokeWidth="1" />
+        <line x1={left} y1={top + innerHeight} x2={left + innerWidth} y2={top + innerHeight} className="stroke-gray-300 dark:stroke-gray-700" strokeWidth="1" />
+
+        <path d={path} fill="none" className="stroke-indigo-500" strokeWidth="3" strokeLinecap="round" />
+
+        {points.map((point) => (
+          <g key={point.assessmentId}>
+            <circle cx={point.x} cy={point.y} r="4" className="fill-indigo-500" />
+            <text x={point.x} y={point.y - 10} textAnchor="middle" className="fill-gray-700 dark:fill-gray-200" style={{ fontSize: 11, fontWeight: 600 }}>
+              {point.totalPoints}
+            </text>
+            <text x={point.x} y={height - 18} textAnchor="middle" className="fill-gray-500 dark:fill-gray-400" style={{ fontSize: 10 }}>
+              {point.label}
+            </text>
+          </g>
+        ))}
+      </svg>
+    </div>
+  );
+}