// Asking the worker something, from anywhere in the popup.
//
// Its own module rather than a helper in popup.ts, because popup.ts imports
// the cards and a card that needed this would import it back.

import type { Msg } from '../lib/types'

/**
 * A round trip to the background worker. The worker answers a thrown handler
 * with `{__error}` rather than by rejecting (a rejected sendResponse does not
 * survive the channel), so unwrap that back into a rejection here.
 */
export async function send<T>(msg: Msg): Promise<T> {
  const res = await chrome.runtime.sendMessage(msg)
  if (res && typeof res === 'object' && '__error' in res) {
    throw new Error(String((res as { __error: unknown }).__error))
  }
  return res as T
}