import type { LiveAgentControlRequest } from "./live-agent-control.ts";

export interface LiveControlRealtimeMessage {
	type: "live-control";
	version: 1;
	request: LiveAgentControlRequest;
}

type Listener = (request: LiveAgentControlRequest) => void | Promise<void>;

const listeners = new Set<Listener>();

export function publishLiveControlRealtime(request: LiveAgentControlRequest): void {
	for (const listener of [...listeners]) void listener(request);
}

export function subscribeLiveControlRealtime(listener: Listener): () => void {
	listeners.add(listener);
	return () => listeners.delete(listener);
}

export function liveControlRealtimeMessage(request: LiveAgentControlRequest): LiveControlRealtimeMessage {
	return { type: "live-control", version: 1, request };
}

export function parseLiveControlRealtimeMessage(raw: unknown): LiveAgentControlRequest | undefined {
	if (!raw || typeof raw !== "object" || Array.isArray(raw)) return undefined;
	const message = raw as { type?: unknown; version?: unknown; request?: unknown };
	if (message.type !== "live-control" || message.version !== 1 || !message.request || typeof message.request !== "object" || Array.isArray(message.request)) return undefined;
	const request = message.request as Partial<LiveAgentControlRequest>;
	return typeof request.id === "string" && typeof request.runId === "string" && typeof request.taskId === "string" && (request.operation === "steer" || request.operation === "follow-up" || request.operation === "stop" || request.operation === "resume") && typeof request.createdAt === "string" ? request as LiveAgentControlRequest : undefined;
}

export function clearLiveControlRealtimeForTest(): void {
	listeners.clear();
}