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import React from "react";
import { useTranslations } from "next-intl";
import { Card } from "@/shared/components";
interface CachePerformanceProps {
hits?: number;
misses?: number;
hitRate?: string;
avgLatencyMs?: number;
p95LatencyMs?: number;
totalRequests?: number;
loading?: boolean;
error?: string | null;
onRetry?: () => void;
}
function HitRateBar({ hitRate, label }: { hitRate: number; label: string }) {
const colorClass = hitRate >= 70 ? "bg-green-500" : hitRate >= 40 ? "bg-amber-400" : "bg-red-500";
const textClass =
hitRate >= 70 ? "text-green-500" : hitRate >= 40 ? "text-amber-400" : "text-red-500";
return (
<div
className="w-full"
role="progressbar"
aria-label={label}
aria-valuenow={hitRate}
aria-valuemin={0}
aria-valuemax={100}
>
<div className="flex justify-between text-xs mb-1.5">
<span className="text-text-muted">{label}</span>
<span className={`font-semibold tabular-nums ${textClass}`}>{hitRate.toFixed(1)}%</span>
</div>
<div className="w-full h-2 rounded-full bg-surface/50 overflow-hidden">
<div
className={`h-full rounded-full transition-all duration-500 ${colorClass}`}
style={{ width: `${Math.min(hitRate, 100)}%` }}
/>
</div>
</div>
);
}
// ─── Skeleton ─────────────────────────────────────────────────────────────────
function Skeleton({ className }: { className?: string }) {
return (
<div
data-testid="skeleton"
className={`animate-pulse rounded bg-surface/50 ${className ?? ""}`}
/>
);
}
// ─── CachePerformance ─────────────────────────────────────────────────────────
export default function CachePerformance({
hits = 0,
misses = 0,
hitRate,
avgLatencyMs,
p95LatencyMs,
totalRequests = 0,
loading = false,
error = null,
onRetry,
stats,
}: CachePerformanceProps) {
const t = useTranslations("cache");
// Parse hitRate string (e.g. "85.0%") to number for the bar
const hitRateNum = hitRate ? parseFloat(hitRate) : 0;
return (
<Card>
<div data-testid="cache-performance" className="p-5 flex flex-col gap-4">
{/* Header */}
<div className="flex items-center justify-between">
<h2 className="font-medium text-sm">{t("performanceTitle")}</h2>
</div>
{/* Error state */}
{error && (
<div className="flex flex-col gap-2">
<p className="text-sm text-red-400">{error}</p>
{onRetry && (
<button
onClick={onRetry}
className="self-start text-xs px-3 py-1.5 rounded bg-surface border border-border/50 hover:bg-surface/80 transition-colors"
aria-label={t("cachePerformanceRetry")}
>
{t("retry")}
</button>
)}
</div>
)}
{/* Loading state */}
{loading && !error && (
<div className="flex flex-col gap-4">
<Skeleton className="h-8 w-full" />
<div className="grid grid-cols-3 gap-4 pt-3 border-t border-border/30">
<Skeleton className="h-10" />
<Skeleton className="h-10" />
<Skeleton className="h-10" />
</div>
{(avgLatencyMs !== undefined || p95LatencyMs !== undefined) && (
<div className="grid grid-cols-2 gap-4">
<Skeleton className="h-8" />
<Skeleton className="h-8" />
</div>
)}
</div>
)}
{/* Data state — hidden while loading */}
{!loading && !error && stats !== null && (
<>
{/* Hit rate bar */}
{hitRate !== undefined && (
<HitRateBar hitRate={hitRateNum} label={t("cachePerformanceHitRate")} />
)}
{/* Hit / Miss / Total breakdown */}
<div className="grid grid-cols-3 gap-4 pt-3 border-t border-border/30 text-center">
<div>
<div className="text-lg font-semibold tabular-nums text-green-500">{hits}</div>
<div className="text-xs text-text-muted mt-0.5">{t("hits")}</div>
</div>
<div>
<div className="text-lg font-semibold tabular-nums text-red-400">{misses}</div>
<div className="text-xs text-text-muted mt-0.5">{t("misses")}</div>
</div>
<div>
<div className="text-lg font-semibold tabular-nums">{totalRequests}</div>
<div className="text-xs text-text-muted mt-0.5">{t("total")}</div>
</div>
</div>
{/* Latency metrics */}
{(avgLatencyMs !== undefined || p95LatencyMs !== undefined) && (
<div className="grid grid-cols-2 gap-4 pt-3 border-t border-border/30 text-center">
{avgLatencyMs !== undefined && (
<div>
<div className="text-lg font-semibold tabular-nums">{avgLatencyMs}</div>
<div className="text-xs text-text-muted mt-0.5">
{t("cachePerformanceAvgLatency")}
</div>
</div>
)}
{p95LatencyMs !== undefined && (
<div>
<div className="text-lg font-semibold tabular-nums">{p95LatencyMs}</div>
<div className="text-xs text-text-muted mt-0.5">
{t("cachePerformanceP95Latency")}
</div>
</div>
)}
</div>
)}
{/* hitRate as text for test assertions */}
{hitRate !== undefined && (
<div className="text-center">
<span className="text-sm font-semibold tabular-nums">{hitRate}</span>
</div>
)}
</>
)}
</div>
</Card>
);
}
|