// Test-only auxiliary extension.
//
// The owned fixture can only path-load extensions, so the contract test's inline
// footer/producer factories are reproduced here as a single extension that
// forwards the shared event bus and session lifecycle to hooks the contract
// test installs on `globalThis`. This keeps every observed interaction on real
// public Pi APIs (`pi.events`, `pi.on`, `ctx.ui`) without reaching fixture or
// runner internals.
import type {
	ExtensionAPI,
	ExtensionContext,
} from "@earendil-works/pi-coding-agent";

export type ProbeHooks = {
	onFooterSegment?: (data: unknown) => void;
	onSessionStart?: (ctx: ExtensionContext, pi: ExtensionAPI) => void;
};

function hooks(): ProbeHooks | undefined {
	return (globalThis as { __modelInfoProbe?: ProbeHooks }).__modelInfoProbe;
}

export default function probeExtension(pi: ExtensionAPI): void {
	pi.events.on("footer:segment", (data: unknown) => {
		hooks()?.onFooterSegment?.(data);
	});
	pi.on("session_start", (_event, ctx) => {
		hooks()?.onSessionStart?.(ctx, pi);
	});
}