import { invoke } from "$lib/runtime/invoke";
import type { BackendCommand, BackendResponse } from "./types";

function newCorrelationId(): string {
  return `ui-${Date.now()}-${Math.random().toString(16).slice(2)}`;
}

type SendCommandOptions = {
  keepalive?: boolean;
};

export async function sendCommand<T>(
  command: BackendCommand,
  options: SendCommandOptions = {},
): Promise<T> {
  const envelope: BackendCommand = {
    ...command,
    correlationId: command.correlationId ?? newCorrelationId(),
  };
  const response = await invoke<BackendResponse<T>>("sidecar_command", {
    command: envelope,
    keepalive: options.keepalive === true,
  });

  if (!response.ok) {
    throw new Error(response.error || "Backend command failed");
  }

  return response.data;
}