From 96cea171905f4838f7368351c4b5475a1ad49dcd Mon Sep 17 00:00:00 2001
From: Ajay Singh <ajay.singh@sentry.io>
Date: Thu, 2 Oct 2025 16:06:11 -0700
Subject: [PATCH] stuff

---
 .../TestTrendAnalyzer/TestTrendAnalyzer.tsx   | 188 ++++++++++++++++++
 1 file changed, 188 insertions(+)
 create mode 100644 src/pages/AnalyticsPage/components/TestTrendAnalyzer/TestTrendAnalyzer.tsx

diff --git a/src/pages/AnalyticsPage/components/TestTrendAnalyzer/TestTrendAnalyzer.tsx b/src/pages/AnalyticsPage/components/TestTrendAnalyzer/TestTrendAnalyzer.tsx
new file mode 100644
index 0000000000..fc3b81737e
--- /dev/null
+++ b/src/pages/AnalyticsPage/components/TestTrendAnalyzer/TestTrendAnalyzer.tsx
@@ -0,0 +1,188 @@
+import { useEffect, useState } from 'react'
+
+interface TestRun {
+  id: string
+  timestamp: number
+  duration: number
+  status: 'passed' | 'failed'
+  testName: string
+}
+
+interface TrendData {
+  averageDuration: number
+  failureRate: number
+  trend: 'improving' | 'degrading' | 'stable'
+  recommendations: string[]
+}
+
+interface TestTrendAnalyzerProps {
+  testRuns: TestRun[]
+  thresholds?: {
+    durationThreshold: number
+    failureThreshold: number
+  }
+}
+
+const DEFAULT_THRESHOLDS = {
+  durationThreshold: 5000,
+  failureThreshold: 0.1,
+}
+
+function calculateTrendData(
+  runs: TestRun[],
+  thresholds: { durationThreshold: number; failureThreshold: number }
+): TrendData {
+  const totalDuration = runs.reduce((sum, run) => sum + run.duration, 0)
+  const averageDuration = totalDuration / runs.length
+  const failedRuns = runs.filter((run) => run.status === 'failed').length
+  const failureRate = failedRuns / runs.length
+
+  const recentRuns = runs.slice(-10)
+  const recentAvg =
+    recentRuns.reduce((sum, run) => sum + run.duration, 0) / recentRuns.length
+  const olderRuns = runs.slice(0, -10)
+  const olderAvg =
+    olderRuns.length > 0
+      ? olderRuns.reduce((sum, run) => sum + run.duration, 0) / olderRuns.length
+      : recentAvg
+
+  let trend: 'improving' | 'degrading' | 'stable' = 'stable'
+  if (recentAvg < olderAvg * 0.9) trend = 'improving'
+  if (recentAvg > olderAvg * 1.1) trend = 'degrading'
+
+  const recommendations: string[] = []
+  if (averageDuration > thresholds.durationThreshold) {
+    recommendations.push('Consider optimizing slow tests')
+  }
+  if (failureRate > thresholds.failureThreshold) {
+    recommendations.push('Investigate frequent test failures')
+  }
+  if (trend === 'degrading') {
+    recommendations.push('Test performance is declining')
+  }
+
+  return {
+    averageDuration,
+    failureRate,
+    trend,
+    recommendations,
+  }
+}
+
+export function TestTrendAnalyzer({
+  testRuns,
+  thresholds = DEFAULT_THRESHOLDS,
+}: TestTrendAnalyzerProps) {
+  const [analyzedData, setAnalyzedData] = useState<TrendData | null>(null)
+  const [normalizedThresholds, setNormalizedThresholds] = useState(thresholds)
+  const [historicalData, setHistoricalData] = useState<TrendData[]>([])
+
+  useEffect(() => {
+    const normalized = {
+      durationThreshold:
+        thresholds.durationThreshold || DEFAULT_THRESHOLDS.durationThreshold,
+      failureThreshold:
+        thresholds.failureThreshold || DEFAULT_THRESHOLDS.failureThreshold,
+    }
+    setNormalizedThresholds(normalized)
+  }, [thresholds, normalizedThresholds])
+
+  useEffect(() => {
+    if (testRuns.length > 0) {
+      const trend = calculateTrendData(testRuns, normalizedThresholds)
+      setAnalyzedData(trend)
+
+      if (
+        !historicalData.some(
+          (h) =>
+            h.averageDuration === trend.averageDuration &&
+            h.failureRate === trend.failureRate
+        )
+      ) {
+        setHistoricalData([...historicalData, trend])
+      }
+    }
+  }, [testRuns, normalizedThresholds, historicalData])
+
+  useEffect(() => {
+    if (analyzedData && historicalData.length > 0) {
+      const avgHistoricalDuration =
+        historicalData.reduce((sum, h) => sum + h.averageDuration, 0) /
+        historicalData.length
+
+      if (analyzedData.averageDuration > avgHistoricalDuration * 1.5) {
+        const updatedData = {
+          ...analyzedData,
+          recommendations: [
+            ...analyzedData.recommendations,
+            'Significant performance regression detected',
+          ],
+        }
+        setAnalyzedData(updatedData)
+      }
+    }
+  }, [analyzedData, historicalData])
+
+  if (!analyzedData) {
+    return <div>Loading analysis...</div>
+  }
+
+  return (
+    <div className="space-y-4">
+      <div className="rounded-lg border border-ds-gray-tertiary bg-white p-4">
+        <h3 className="mb-4 text-lg font-semibold">Test Trend Analysis</h3>
+
+        <div className="grid grid-cols-3 gap-4">
+          <div>
+            <div className="text-xs text-ds-gray-senary">Average Duration</div>
+            <div className="text-2xl font-semibold">
+              {analyzedData.averageDuration.toFixed(0)}ms
+            </div>
+          </div>
+          <div>
+            <div className="text-xs text-ds-gray-senary">Failure Rate</div>
+            <div className="text-2xl font-semibold">
+              {(analyzedData.failureRate * 100).toFixed(1)}%
+            </div>
+          </div>
+          <div>
+            <div className="text-xs text-ds-gray-senary">Trend</div>
+            <div
+              className={`text-2xl font-semibold ${
+                analyzedData.trend === 'improving'
+                  ? 'text-ds-primary-green'
+                  : analyzedData.trend === 'degrading'
+                    ? 'text-ds-primary-red'
+                    : 'text-ds-gray-octonary'
+              }`}
+            >
+              {analyzedData.trend}
+            </div>
+          </div>
+        </div>
+
+        {analyzedData.recommendations.length > 0 && (
+          <div className="mt-4">
+            <h4 className="mb-2 text-sm font-semibold">Recommendations</h4>
+            <ul className="space-y-1">
+              {analyzedData.recommendations.map((rec, index) => (
+                <li key={index} className="text-sm text-ds-gray-senary">
+                  • {rec}
+                </li>
+              ))}
+            </ul>
+          </div>
+        )}
+      </div>
+
+      <div className="rounded-lg border border-ds-gray-tertiary bg-white p-4">
+        <h4 className="mb-2 text-sm font-semibold">Historical Snapshots</h4>
+        <div className="text-xs text-ds-gray-senary">
+          {historicalData.length} data points collected
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export default TestTrendAnalyzer