import { Event, EventTemplate, finalizeEvent } from 'nostr-tools'
import { hexToBytes } from 'nostr-tools/utils'
import type { ContentDeliveryTracking } from './platformTrackingTypes'

const TRACKING_KIND = 30078 // Custom kind for platform tracking

export function buildTrackingTags(tracking: ContentDeliveryTracking, platformPubkey: string): string[][] {
  return [
    ['p', platformPubkey],
    ['article', tracking.articleId],
    ['author', tracking.articlePubkey],
    ['recipient', tracking.recipientPubkey],
    ['message', tracking.messageEventId],
    ['amount', tracking.amount.toString()],
    ...(tracking.authorAmount ? [['author_amount', tracking.authorAmount.toString()]] : []),
    ...(tracking.platformCommission ? [['platform_commission', tracking.platformCommission.toString()]] : []),
    ['verified', tracking.verified ? 'true' : 'false'],
    ['timestamp', tracking.timestamp.toString()],
    ...(tracking.zapReceiptId ? [['zap_receipt', tracking.zapReceiptId]] : []),
  ]
}

export function buildTrackingEvent(
  tracking: ContentDeliveryTracking,
  _authorPubkey: string,
  authorPrivateKey: string,
  platformPubkey: string
): Event {
  const eventTemplate: EventTemplate = {
    kind: TRACKING_KIND,
    created_at: Math.floor(Date.now() / 1000),
    tags: buildTrackingTags(tracking, platformPubkey),
    content: JSON.stringify({
      articleId: tracking.articleId,
      articlePubkey: tracking.articlePubkey,
      recipientPubkey: tracking.recipientPubkey,
      messageEventId: tracking.messageEventId,
      amount: tracking.amount,
      authorAmount: tracking.authorAmount,
      platformCommission: tracking.platformCommission,
      verified: tracking.verified,
      timestamp: tracking.timestamp,
      zapReceiptId: tracking.zapReceiptId,
    }),
  }

  const secretKey = hexToBytes(authorPrivateKey)
  return finalizeEvent(eventTemplate, secretKey)
}

export function getTrackingKind(): number {
  return TRACKING_KIND
}