refactor(analytics): replace gradient bars with interactive SVG donut and horizontal bar charts

services/frontend/src/features/analytics/components/AIDistributionPanel.tsx

@@ -1,3 +1,4 @@
+import { useState } from "react";
 import type { AIStats } from "../../../shared/api/client";
 import { cn } from "../../../shared/lib/utils";
 import {
@@ -13,80 +14,203 @@ interface AIDistributionPanelProps {
   loading: boolean;
 }
 
-const SEVERITY_LABELS: Record<
+const SEVERITY_META: Record<
   string,
-  { label: string; color: string; bar: string }
+  { label: string; color: string; darkColor: string }
 > = {
   critical: {
     label: "Critical",
-    color: "text-accent",
-    bar: "bg-gradient-to-r from-accent to-red-400",
+    color: "#e11d48",
+    darkColor: "#be123c",
   },
   high: {
     label: "High",
-    color: "text-red-500",
-    bar: "bg-gradient-to-r from-red-400 to-red-300",
+    color: "#f43f5e",
+    darkColor: "#e11d48",
   },
   medium: {
     label: "Medium",
-    color: "text-orange-500",
-    bar: "bg-gradient-to-r from-orange-400 to-yellow-300",
+    color: "#fb923c",
+    darkColor: "#f97316",
   },
   low: {
     label: "Low",
-    color: "text-yellow-600",
-    bar: "bg-gradient-to-r from-yellow-300 to-primary/60",
+    color: "#facc15",
+    darkColor: "#eab308",
   },
   none: {
     label: "None",
-    color: "text-muted-foreground",
-    bar: "bg-sky-200/50",
+    color: "#94a3b8",
+    darkColor: "#64748b",
   },
 };
 
-const ACTION_LABELS: Record<
+const ACTION_META: Record<
   string,
-  { label: string; color: string; bar: string }
+  { label: string; color: string }
 > = {
-  escalate: {
-    label: "Escalate",
-    color: "text-accent",
-    bar: "bg-gradient-to-r from-accent to-red-400",
-  },
-  delete: {
-    label: "Delete",
-    color: "text-red-500",
-    bar: "bg-gradient-to-r from-red-400 to-red-300",
-  },
-  review: {
-    label: "Review",
-    color: "text-orange-500",
-    bar: "bg-gradient-to-r from-orange-400 to-yellow-300",
-  },
-  warn: {
-    label: "Warn",
-    color: "text-yellow-600",
-    bar: "bg-gradient-to-r from-yellow-300 to-primary/60",
-  },
-  monitor: {
-    label: "Monitor",
-    color: "text-primary",
-    bar: "bg-gradient-to-r from-primary to-teal-300",
-  },
-  none: {
-    label: "None",
-    color: "text-muted-foreground",
-    bar: "bg-sky-200/50",
-  },
+  escalate: { label: "Escalate", color: "#e11d48" },
+  delete: { label: "Delete", color: "#f43f5e" },
+  review: { label: "Review", color: "#fb923c" },
+  warn: { label: "Warn", color: "#facc15" },
+  monitor: { label: "Monitor", color: "#38bdf8" },
+  none: { label: "None", color: "#94a3b8" },
 };
 
+function DonutChart({
+  entries,
+  size = 140,
+  strokeWidth = 22,
+}: {
+  entries: Array<{ key: string; value: number; color: string; label: string }>;
+  size?: number;
+  strokeWidth?: number;
+}) {
+  const total = entries.reduce((sum, e) => sum + e.value, 0);
+  const [hoveredKey, setHoveredKey] = useState<string | null>(null);
+
+  if (total === 0) {
+    return (
+      <div className="flex items-center justify-center text-[11px] text-muted-foreground">
+        No data
+      </div>
+    );
+  }
+
+  const radius = (size - strokeWidth) / 2;
+  const circumference = 2 * Math.PI * radius;
+  const center = size / 2;
+
+  let cumulative = 0;
+  const segments = entries
+    .filter((e) => e.value > 0)
+    .map((e) => {
+      const offset = cumulative;
+      const length = (e.value / total) * circumference;
+      cumulative += length;
+      return { ...e, length, offset };
+    });
+
+  return (
+    <div className="relative" style={{ width: size, height: size }}>
+      <svg width={size} height={size} className="-rotate-90">
+        {/* Background ring */}
+        <circle
+          cx={center}
+          cy={center}
+          r={radius}
+          fill="none"
+          stroke="hsl(var(--muted))"
+          strokeWidth={strokeWidth}
+          opacity={0.2}
+        />
+        {/* Segments */}
+        {segments.map((seg) => {
+          const isHovered = hoveredKey === seg.key;
+          return (
+            <circle
+              key={seg.key}
+              cx={center}
+              cy={center}
+              r={radius}
+              fill="none"
+              stroke={seg.color}
+              strokeWidth={strokeWidth}
+              strokeDasharray={`${seg.length} ${circumference - seg.length}`}
+              strokeDashoffset={-seg.offset}
+              strokeLinecap="round"
+              className={cn(
+                "transition-all duration-200",
+                hoveredKey && !isHovered ? "opacity-30" : "opacity-100",
+              )}
+              onMouseEnter={() => setHoveredKey(seg.key)}
+              onMouseLeave={() => setHoveredKey(null)}
+              style={{
+                filter: isHovered ? `drop-shadow(0 0 4px ${seg.color}80)` : undefined,
+              }}
+            />
+          );
+        })}
+      </svg>
+
+      {/* Center label */}
+      <div className="absolute inset-0 flex flex-col items-center justify-center pointer-events-none">
+        <span className="text-lg font-bold tabular-nums leading-none">
+          {total}
+        </span>
+        <span className="text-[9px] text-muted-foreground mt-0.5">Total</span>
+      </div>
+
+      {/* Hover tooltip */}
+      {hoveredKey && (() => {
+        const entry = entries.find((e) => e.key === hoveredKey);
+        if (!entry) return null;
+        const pct = ((entry.value / total) * 100).toFixed(0);
+        return (
+          <div
+            className="absolute -bottom-8 left-1/2 -translate-x-1/2 whitespace-nowrap rounded-md border border-muted bg-white px-2.5 py-1 text-xs shadow-lg z-10"
+          >
+            <span className="font-medium">{entry.label}</span>:{" "}
+            <span className="tabular-nums">{entry.value}</span> ({pct}%)
+          </div>
+        );
+      })()}
+    </div>
+  );
+}
+
+function HorizontalBarChart({
+  entries,
+  maxValue,
+}: {
+  entries: Array<{ key: string; value: number; color: string; label: string }>;
+  maxValue: number;
+}) {
+  const effectiveMax = Math.max(maxValue, 1);
+  const [hoveredKey, setHoveredKey] = useState<string | null>(null);
+
+  return (
+    <div className="space-y-1.5">
+      {entries.map((e) => {
+        const isHovered = hoveredKey === e.key;
+        const widthPct = (e.value / effectiveMax) * 100;
+        return (
+          <div
+            key={e.key}
+            className="flex items-center gap-2"
+            onMouseEnter={() => setHoveredKey(e.key)}
+            onMouseLeave={() => setHoveredKey(null)}
+          >
+            <span className="w-16 text-[10px] font-medium text-right truncate text-muted-foreground">
+              {e.label}
+            </span>
+            <div className="flex-1 h-3 overflow-hidden rounded-md bg-muted/30">
+              <div
+                className={cn(
+                  "h-full rounded-md transition-all duration-300",
+                  isHovered ? "opacity-100" : "opacity-80",
+                )}
+                style={{
+                  width: `${widthPct}%`,
+                  backgroundColor: e.color,
+                }}
+              />
+            </div>
+            <span className="w-8 text-right font-mono text-[10px] tabular-nums text-muted-foreground">
+              {e.value}
+            </span>
+          </div>
+        );
+      })}
+    </div>
+  );
+}
+
 export function AIDistributionPanel({
   stats,
   loading,
 }: AIDistributionPanelProps) {
-  if (loading && !stats) {
-    return <LoadingBox />;
-  }
+  if (loading && !stats) return <LoadingBox />;
 
   if (!stats || stats.total_analyzed === 0) {
     return (
@@ -98,11 +222,31 @@ export function AIDistributionPanel({
     );
   }
 
-  const severityEntries = Object.entries(stats.severity);
-  const maxSeverity = Math.max(...severityEntries.map(([, v]) => v), 1);
+  const severityEntries = Object.entries(stats.severity)
+    .map(([key, value]) => {
+      const m = SEVERITY_META[key] ?? {
+        label: key,
+        color: "#94a3b8",
+        darkColor: "#64748b",
+      };
+      return { key, value, color: m.color, label: m.label };
+    })
+    .filter((e) => e.value > 0);
 
-  const actionEntries = Object.entries(stats.recommended_actions);
-  const maxAction = Math.max(...actionEntries.map(([, v]) => v), 1);
+  const actionEntries = Object.entries(stats.recommended_actions)
+    .map(([key, value]) => {
+      const m = ACTION_META[key] ?? {
+        label: key,
+        color: "#94a3b8",
+      };
+      return { key, value, color: m.color, label: m.label };
+    })
+    .filter((e) => e.value > 0);
+
+  const maxAction = Math.max(
+    ...actionEntries.map((e) => e.value),
+    1,
+  );
 
   return (
     <Card>
@@ -112,105 +256,72 @@ export function AIDistributionPanel({
           Distribusi Analisis AI
         </CardTitle>
         <CardDescription className="text-xs">
-          Sebaran tingkat keparahan dan rekomendasi dari {stats.total_analyzed}{" "}
-          pesan yang dianalisis.
+          Sebaran tingkat keparahan dan rekomendasi dari{" "}
+          {stats.total_analyzed} pesan yang dianalisis.
         </CardDescription>
       </CardHeader>
       <CardContent>
-        <div className="space-y-4">
-          {/* Severity */}
-          <div>
-            <h4 className="mb-2 text-[11px] font-semibold uppercase tracking-wider text-muted-foreground">
+        <div className="grid grid-cols-1 sm:grid-cols-2 gap-6">
+          {/* Severity Donut */}
+          <div className="flex flex-col items-center gap-3">
+            <h4 className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground self-start">
               Severity
             </h4>
-            <div className="space-y-1.5">
-              {severityEntries.reverse().map(([key, value]) => {
-                const s = SEVERITY_LABELS[key] ?? {
-                  label: key,
-                  color: "text-muted-foreground",
-                  bar: "bg-sky-200/50",
-                };
-                return (
-                  <div key={key} className="flex items-center gap-2">
-                    <span
-                      className={cn("w-16 text-[10px] font-medium", s.color)}
-                    >
-                      {s.label}
-                    </span>
-                    <div className="flex-1 h-2 overflow-hidden rounded-full bg-sky-50">
-                      <div
-                        className={cn("h-full rounded-full", s.bar)}
-                        style={{
-                          width: `${(value / maxSeverity) * 100}%`,
-                        }}
-                      />
-                    </div>
-                    <span className="w-8 text-right font-mono text-[10px] tabular-nums text-muted-foreground">
-                      {value}
-                    </span>
-                  </div>
-                );
-              })}
+            <DonutChart entries={severityEntries} />
+            {/* Severity legend */}
+            <div className="flex flex-wrap justify-center gap-x-3 gap-y-1">
+              {severityEntries.map((e) => (
+                <span
+                  key={e.key}
+                  className="flex items-center gap-1 text-[10px] text-muted-foreground"
+                >
+                  <span
+                    className="inline-block h-2 w-2 rounded-sm"
+                    style={{ backgroundColor: e.color }}
+                  />
+                  {e.label}:{" "}
+                  <span className="font-medium tabular-nums text-foreground">
+                    {e.value}
+                  </span>
+                </span>
+              ))}
             </div>
           </div>
 
-          {/* Recommended Actions */}
+          {/* Recommended Actions Bar Chart */}
           <div>
             <h4 className="mb-2 text-[11px] font-semibold uppercase tracking-wider text-muted-foreground">
               Rekomendasi Tindakan
             </h4>
-            <div className="space-y-1.5">
-              {actionEntries.map(([key, value]) => {
-                const a = ACTION_LABELS[key] ?? {
-                  label: key,
-                  color: "text-muted-foreground",
-                  bar: "bg-sky-200/50",
-                };
-                return (
-                  <div key={key} className="flex items-center gap-2">
-                    <span
-                      className={cn("w-16 text-[10px] font-medium", a.color)}
-                    >
-                      {a.label}
-                    </span>
-                    <div className="flex-1 h-2 overflow-hidden rounded-full bg-sky-50">
-                      <div
-                        className={cn("h-full rounded-full", a.bar)}
-                        style={{
-                          width: `${(value / maxAction) * 100}%`,
-                        }}
-                      />
-                    </div>
-                    <span className="w-8 text-right font-mono text-[10px] tabular-nums text-muted-foreground">
-                      {value}
-                    </span>
-                  </div>
-                );
-              })}
-            </div>
+            <HorizontalBarChart
+              entries={actionEntries}
+              maxValue={maxAction}
+            />
           </div>
+        </div>
 
-          {/* Footer metrics */}
-          <div className="flex flex-wrap gap-3 border-t border-sky-100 pt-3 text-[10px] text-muted-foreground">
-            <span>
-              Rerata confidence:{" "}
-              <strong>{(stats.avg_confidence * 100).toFixed(0)}%</strong>
-            </span>
-            <span>
-              Rerata score:{" "}
-              <strong>{(stats.avg_score * 100).toFixed(0)}%</strong>
-            </span>
-            <span>
-              Error:{" "}
-              <strong className="text-red-500">{stats.analysis_errors}</strong>
-            </span>
-            <span>
-              Pending:{" "}
-              <strong className="text-yellow-600">
-                {stats.analysis_pending}
-              </strong>
-            </span>
-          </div>
+        {/* Footer metrics */}
+        <div className="mt-4 flex flex-wrap gap-3 border-t border-muted pt-3 text-[10px] text-muted-foreground">
+          <span>
+            Rerata confidence:{" "}
+            <strong>{(stats.avg_confidence * 100).toFixed(0)}%</strong>
+          </span>
+          <span>
+            Rerata score:{" "}
+            <strong>{(stats.avg_score * 100).toFixed(0)}%</strong>
+          </span>
+          <span>
+            Error:{" "}
+            <strong className="text-destructive">
+              {stats.analysis_errors}
+            </strong>
+          </span>
+          <span>
+            Pending:{" "}
+            <strong className="text-orange-500">
+              {stats.analysis_pending}
+            </strong>
+          </span>
         </div>
       </CardContent>
     </Card>
@@ -221,7 +332,7 @@ function LoadingBox() {
   return (
     <Card>
       <CardContent className="flex h-[260px] items-center justify-center text-sm text-muted-foreground">
-        <span className="h-4 w-4 animate-spin rounded-full border-2 border-current border-t-transparent" />
+        <span className="h-4 w-4 animate-spin rounded-sm border-2 border-current border-t-transparent" />
         <span className="ml-2">Memuat data...</span>
       </CardContent>
     </Card>