refactor(health): share health snapshot computation

ts/helpers/health.ts

@@ -0,0 +1,49 @@
+import type { IHealthResponse } from '../interfaces/api.ts';
+import type { IContainerStatus } from '../interfaces/container.ts';
+import type { IGpuInfo } from '../interfaces/gpu.ts';
+
+export function buildHealthSnapshot(options: {
+  statuses: Map<string, IContainerStatus>;
+  modelCount: number;
+  gpus: IGpuInfo[];
+  startTime: number;
+  version: string;
+}): IHealthResponse {
+  let status: 'ok' | 'degraded' | 'error' = 'ok';
+  const reasons = new Set<'unhealthy_container' | 'no_models_available' | 'gpu_detection_failed'>();
+  const containerHealth: Record<string, 'healthy' | 'unhealthy'> = {};
+  const gpuStatus: Record<string, 'available' | 'in_use' | 'error'> = {};
+
+  for (const [id, containerStatus] of options.statuses) {
+    if (containerStatus.running && containerStatus.health === 'healthy') {
+      containerHealth[id] = 'healthy';
+    } else {
+      containerHealth[id] = 'unhealthy';
+      status = 'degraded';
+      reasons.add('unhealthy_container');
+    }
+  }
+
+  for (const gpu of options.gpus) {
+    gpuStatus[gpu.id] = 'available';
+  }
+
+  if (options.modelCount === 0) {
+    status = 'degraded';
+    reasons.add('no_models_available');
+  }
+
+  return {
+    status,
+    reasons: Array.from(reasons),
+    version: options.version,
+    uptime: Math.floor((Date.now() - options.startTime) / 1000),
+    containers: options.statuses.size,
+    models: options.modelCount,
+    gpus: options.gpus.length,
+    details: {
+      containers: containerHealth,
+      gpus: gpuStatus,
+    },
+  };
+}