import type { InternalMessage } from '../types'
import type { EndpointFingerprint } from './endpoint-fingerprint'

export interface DeliveryReceipt {
  message: InternalMessage
  to: EndpointFingerprint
  from: {
    endpointId: string
    fingerprint: EndpointFingerprint
  }
}

export const createDeliveryLogger = () => {
  let logs: ReadonlyArray<DeliveryReceipt> = []

  return {
    add: (...receipts: DeliveryReceipt[]) => {
      logs = [...logs, ...receipts]
    },
    remove: (message: string | DeliveryReceipt[]) => {
      logs
        = typeof message === 'string'
          ? logs.filter(receipt => receipt.message.transactionId !== message)
          : logs.filter(receipt => !message.includes(receipt))
    },
    entries: () => logs,
  }
}