export const EXTENSION_OPERATIONS = [
  "mcp-connect",
  "mcp-auth",
  "mcp-disconnect",
  "mcp-refresh",
  "skill-install",
  "skill-validation",
  "skill-activation",
  "skill-resource",
  "skill-script",
] as const;

export const EXTENSION_FAILURES = [
  "authentication",
  "connection",
  "discovery",
  "timeout",
  "cancelled",
  "storage",
  "validation",
  "unavailable",
  "script",
  "unknown",
] as const;

/** Closed metadata vocabulary; raw errors and operation payloads never enter it. */
export interface ExtensionDiagnosticInput {
  operation: (typeof EXTENSION_OPERATIONS)[number];
  source?: { kind: "mcp" | "skill"; id: string };
  version?: string;
  fingerprint?: string;
  startedAt: number;
  status: "completed" | "error" | "aborted";
  failure?: (typeof EXTENSION_FAILURES)[number];
}

export type ExtensionDiagnosticSink = (event: ExtensionDiagnosticInput) => void;

/** Owner-only presentation; labels are joined from current inventory, never exported. */
export interface ExtensionHealth {
  available: boolean;
  events: Array<{
    sequence: number;
    timestamp: number;
    operation: ExtensionDiagnosticInput["operation"];
    status: ExtensionDiagnosticInput["status"];
    durationMs: number | null;
    failure?: ExtensionDiagnosticInput["failure"];
    sourceId: string | null;
    sourceName: string | null;
    version: string | null;
  }>;
}