import { nostrService } from './nostr'
import { PLATFORM_COMMISSIONS } from './platformCommissions'
import type { Event } from 'nostr-tools'
import { objectCache } from './objectCache'

export async function fetchOriginalReviewEvent(reviewId: string): Promise<Event | null> {
  // Read only from IndexedDB cache
  const parsed = await objectCache.getById('review', reviewId)
  if (parsed) {
    // Get the event from cache
    const event = await objectCache.getEventById('review', reviewId)
    if (event) {
      return event
    }
  }

  // Not found in cache - return null (no network request)
  return null
}

export function buildRewardEvent(originalEvent: Event, reviewId: string): {
  kind: number
  created_at: number
  tags: string[][]
  content: string
} {
  return {
    kind: 1,
    created_at: Math.floor(Date.now() / 1000),
    tags: [
      ...originalEvent.tags.filter((tag) => tag[0] !== 'rewarded' && tag[0] !== 'reward_amount'),
      ['e', reviewId],
      ['rewarded', 'true'],
      ['reward_amount', PLATFORM_COMMISSIONS.review.total.toString()],
    ],
    content: originalEvent.content,
  }
}

export function checkIfAlreadyRewarded(originalEvent: Event, reviewId: string): boolean {
  const alreadyRewarded = originalEvent.tags.some((tag) => tag[0] === 'rewarded' && tag[1] === 'true')
  if (alreadyRewarded) {
    console.warn('Review already marked as rewarded', {
      reviewId,
      timestamp: new Date().toISOString(),
    })
  }
  return alreadyRewarded
}

export async function publishRewardEvent(
  updatedEventTemplate: {
    kind: number
    created_at: number
    tags: string[][]
    content: string
  },
  reviewId: string
): Promise<void> {
  try {
    // Get original review to extract hash and parsed data
    const originalEvent = await fetchOriginalReviewEvent(reviewId)
    if (!originalEvent) {
      throw new Error('Original review event not found in cache')
    }

    const { parseReviewFromEvent } = await import('./nostrEventParsing')
    const originalParsed = await parseReviewFromEvent(originalEvent)
    if (!originalParsed) {
      throw new Error('Failed to parse original review')
    }

    // Increment version for update
    const newVersion = (originalParsed.version ?? 0) + 1
    const {hash} = originalParsed
    const index = originalParsed.index ?? 0

    // Build updated parsed Review object
    const updatedParsed = {
      ...originalParsed,
      version: newVersion,
      rewarded: true,
      rewardAmount: PLATFORM_COMMISSIONS.review.total,
    }

    // Set private key in orchestrator
    const privateKey = nostrService.getPrivateKey()
    if (!privateKey) {
      throw new Error('Private key required for signing')
    }
    const { writeOrchestrator } = await import('./writeOrchestrator')
    writeOrchestrator.setPrivateKey(privateKey)

    // Finalize event
    const { finalizeEvent } = await import('nostr-tools')
    const { hexToBytes } = await import('nostr-tools/utils')
    const secretKey = hexToBytes(privateKey)
    const event = finalizeEvent(updatedEventTemplate, secretKey)

    // Get active relays
    const { relaySessionManager } = await import('./relaySessionManager')
    const activeRelays = await relaySessionManager.getActiveRelays()
    const { getPrimaryRelay } = await import('./config')
    const relays = activeRelays.length > 0 ? activeRelays : [await getPrimaryRelay()]

    // Publish via writeOrchestrator (parallel network + local write)
    const result = await writeOrchestrator.writeAndPublish(
      {
        objectType: 'review',
        hash,
        event,
        parsed: updatedParsed,
        version: newVersion,
        hidden: false,
        index,
      },
      relays
    )

    if (result.success) {
      console.warn('Review updated with reward tag', {
        reviewId,
        updatedEventId: event.id,
        timestamp: new Date().toISOString(),
      })
    } else {
      console.error('Failed to publish updated review event', {
        reviewId,
        timestamp: new Date().toISOString(),
      })
    }
  } catch (error) {
    console.error('Error publishing reward event', {
      reviewId,
      error: error instanceof Error ? error.message : 'Unknown error',
      timestamp: new Date().toISOString(),
    })
  }
}

export async function updateReviewWithReward(reviewId: string, authorPrivateKey: string): Promise<void> {
  try {
    const originalEvent = await fetchOriginalReviewEvent(reviewId)
    if (!originalEvent) {
      console.error('Original review event not found', {
        reviewId,
        timestamp: new Date().toISOString(),
      })
      return
    }

    if (checkIfAlreadyRewarded(originalEvent, reviewId)) {
      return
    }

    nostrService.setPrivateKey(authorPrivateKey)
    nostrService.setPublicKey(originalEvent.pubkey)

    const updatedEvent = buildRewardEvent(originalEvent, reviewId)
    await publishRewardEvent(updatedEvent, reviewId)
  } catch (error) {
    console.error('Error updating review with reward', {
      reviewId,
      error: error instanceof Error ? error.message : 'Unknown error',
      timestamp: new Date().toISOString(),
    })
  }
}