import { verifiedSymbol, type Event, type Nostr, VerifiedEvent } from './core.ts'

export async function yieldThread() {
  return new Promise<void>(resolve => {
    const ch = new MessageChannel()
    const handler = () => {
      // @ts-ignore (typescript thinks this property should be called `removeListener`, but in fact it's `removeEventListener`)
      ch.port1.removeEventListener('message', handler)
      resolve()
    }
    // @ts-ignore (typescript thinks this property should be called `addListener`, but in fact it's `addEventListener`)
    ch.port1.addEventListener('message', handler)
    ch.port2.postMessage(0)
    ch.port1.start()
  })
}

export const alwaysTrue: Nostr['verifyEvent'] = (t: Event): t is VerifiedEvent => {
  t[verifiedSymbol] = true
  return true
}