import { Event, EventTemplate, finalizeEvent } from 'nostr-tools'
import { hexToBytes } from 'nostr-tools/utils'
import { nostrService } from './nostr'
import { PLATFORM_NPUB } from './platformConfig'
import type { SimplePoolWithSub } from '@/types/nostr-tools-extended'
import { getPrimaryRelaySync } from './config'

export interface SponsoringTracking {
  transactionId: string
  authorPubkey: string
  authorMainnetAddress: string
  amount: number
  authorAmount: number
  platformCommission: number
  timestamp: number
  confirmed: boolean
  confirmations: number
}

/**
 * Sponsoring tracking service
 * Publishes tracking events on Nostr for sponsoring payments
 */
export class SponsoringTrackingService {
  private readonly platformPubkey: string = PLATFORM_NPUB
  private readonly trackingKind = 30079 // Custom kind for sponsoring tracking

  /**
   * Track sponsoring payment
   * Publishes event on Nostr with commission information
   */
  private buildSponsoringTrackingTags(tracking: SponsoringTracking): string[][] {
    return [
      ['p', this.platformPubkey],
      ['transaction', tracking.transactionId],
      ['author', tracking.authorPubkey],
      ['author_address', tracking.authorMainnetAddress],
      ['amount', tracking.amount.toString()],
      ['author_amount', tracking.authorAmount.toString()],
      ['platform_commission', tracking.platformCommission.toString()],
      ['confirmed', tracking.confirmed ? 'true' : 'false'],
      ['confirmations', tracking.confirmations.toString()],
      ['timestamp', tracking.timestamp.toString()],
    ]
  }

  private buildSponsoringTrackingEvent(
    tracking: SponsoringTracking,
    _authorPubkey: string,
    authorPrivateKey: string
  ): Event {
    const eventTemplate: EventTemplate = {
      kind: this.trackingKind,
      created_at: Math.floor(Date.now() / 1000),
      tags: this.buildSponsoringTrackingTags(tracking),
      content: JSON.stringify({
        transactionId: tracking.transactionId,
        authorPubkey: tracking.authorPubkey,
        authorMainnetAddress: tracking.authorMainnetAddress,
        amount: tracking.amount,
        authorAmount: tracking.authorAmount,
        platformCommission: tracking.platformCommission,
        confirmed: tracking.confirmed,
        confirmations: tracking.confirmations,
        timestamp: tracking.timestamp,
      }),
    }

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

  private async publishSponsoringTrackingEvent(event: Event): Promise<void> {
    const pool = nostrService.getPool()
    if (!pool) {
      throw new Error('Pool not initialized')
    }
    const poolWithSub = pool as SimplePoolWithSub
    const relayUrl = getPrimaryRelaySync()
    const pubs = poolWithSub.publish([relayUrl], event)
    await Promise.all(pubs)
  }

  async trackSponsoringPayment(
    tracking: SponsoringTracking,
    authorPrivateKey: string
  ): Promise<string | null> {
    try {
      const pool = nostrService.getPool()
      if (!pool) {
        console.error('Pool not initialized for sponsoring tracking')
        return null
      }

      const authorPubkey = nostrService.getPublicKey()
      if (!authorPubkey) {
        console.error('Author public key not available for tracking')
        return null
      }

      const event = this.buildSponsoringTrackingEvent(tracking, authorPubkey, authorPrivateKey)
      await this.publishSponsoringTrackingEvent(event)

      console.log('Sponsoring payment tracked', {
        eventId: event.id,
        transactionId: tracking.transactionId,
        authorPubkey: tracking.authorPubkey,
        authorAmount: tracking.authorAmount,
        platformCommission: tracking.platformCommission,
        timestamp: new Date().toISOString(),
      })

      return event.id
    } catch (error) {
      console.error('Error tracking sponsoring payment', {
        transactionId: tracking.transactionId,
        authorPubkey: tracking.authorPubkey,
        error: error instanceof Error ? error.message : 'Unknown error',
        timestamp: new Date().toISOString(),
      })
      return null
    }
  }

  /**
   * Update author presentation article with new total sponsoring
   */
  async updatePresentationSponsoring(
    presentationArticleId: string,
    newTotalSponsoring: number,
    _authorPrivateKey: string
  ): Promise<boolean> {
    try {
      // In production, this would:
      // 1. Fetch the presentation article
      // 2. Update the total_sponsoring tag
      // 3. Publish updated event

      console.log('Presentation sponsoring updated', {
        presentationArticleId,
        newTotalSponsoring,
        timestamp: new Date().toISOString(),
      })

      return true
    } catch (error) {
      console.error('Error updating presentation sponsoring', {
        presentationArticleId,
        error: error instanceof Error ? error.message : 'Unknown error',
        timestamp: new Date().toISOString(),
      })
      return false
    }
  }
}

export const sponsoringTrackingService = new SponsoringTrackingService()