/**
 * Service Worker sync handler - executes sync operations in main thread
 * Listens to requests from Service Worker and executes them
 */

import { platformSyncService } from './platformSync'
import { syncUserContentToCache } from './userContentSync'
import { publishWorker } from './publishWorker'
import { nostrService } from './nostr'
import { swClient } from './swClient'
import type { Event } from 'nostr-tools'

class ServiceWorkerSyncHandler {
  private initialized = false

  /**
   * Initialize the sync handler
   * Sets up message listeners from Service Worker
   */
  async initialize(): Promise<void> {
    if (this.initialized) {
      return
    }

    if (typeof window === 'undefined') {
      return
    }

    try {
      await swClient.register()
      this.registerMessageHandlers()

      this.initialized = true
      console.warn('[SWSyncHandler] Initialized')
    } catch (error) {
      console.error('[SWSyncHandler] Initialization failed:', error)
    }
  }

  private registerMessageHandlers(): void {
    swClient.onMessage('SYNC_REQUEST', (data: unknown) => {
      void this.handleSyncRequestMessage(data)
    })
    swClient.onMessage('PUBLISH_WORKER_REQUEST', () => {
      void this.handlePublishWorkerRequest()
    })
    swClient.onMessage('PUBLISH_REQUEST', (data: unknown) => {
      void this.handlePublishRequestMessage(data)
    })
    swClient.onMessage('NOTIFICATION_DETECT_REQUEST', (data: unknown) => {
      void this.handleNotificationDetectRequestMessage(data)
    })
  }

  private async handleSyncRequestMessage(data: unknown): Promise<void> {
    const syncData = data as { syncType: string; userPubkey?: string }
    if (syncData.syncType === 'platform') {
      await this.handlePlatformSyncRequest()
      return
    }
    if (syncData.syncType === 'user' && syncData.userPubkey) {
      await this.handleUserSyncRequest(syncData.userPubkey)
    }
  }

  private async handlePublishRequestMessage(data: unknown): Promise<void> {
    const publishData = data as { event: Event; relays: string[] }
    await this.handlePublishRequest(publishData.event, publishData.relays)
  }

  private async handleNotificationDetectRequestMessage(data: unknown): Promise<void> {
    const detectData = data as { userPubkey: string }
    await this.handleNotificationDetectRequest(detectData.userPubkey)
  }

  /**
   * Handle platform sync request from Service Worker
   */
  private async handlePlatformSyncRequest(): Promise<void> {
    try {
      console.warn('[SWSyncHandler] Executing platform sync request')
      await platformSyncService.startSync()
    } catch (error) {
      console.error('[SWSyncHandler] Error in platform sync:', error)
    }
  }

  /**
   * Handle user sync request from Service Worker
   */
  private async handleUserSyncRequest(userPubkey: string): Promise<void> {
    try {
      console.warn('[SWSyncHandler] Executing user sync request for:', userPubkey)
      await syncUserContentToCache(userPubkey)
    } catch (error) {
      console.error('[SWSyncHandler] Error in user sync:', error)
    }
  }

  /**
   * Handle publish worker request from Service Worker
   */
  private async handlePublishWorkerRequest(): Promise<void> {
    try {
      console.warn('[SWSyncHandler] Executing publish worker request')
      // Trigger publish worker processing
      // The publishWorker will process unpublished objects
      await publishWorker['processUnpublished']()
    } catch (error) {
      console.error('[SWSyncHandler] Error in publish worker:', error)
    }
  }

  /**
   * Handle notification detection request from Service Worker
   * Le Service Worker détecte les changements indépendamment
   * Ce handler exécute la détection dans le thread principal et crée les notifications via writeService
   */
  private async handleNotificationDetectRequest(userPubkey: string): Promise<void> {
    try {
      console.warn('[SWSyncHandler] Executing notification detection request for:', userPubkey)
      const { notificationDetector } = await import('./notificationDetector')

      // Scanner IndexedDB pour détecter les nouveaux événements
      await notificationDetector.scan()

      // Les notifications sont créées via notificationDetector qui utilise notificationService
      // qui utilise maintenant writeService pour écrire via Web Worker
    } catch (error) {
      console.error('[SWSyncHandler] Error in notification detection:', error)
    }
  }

  /**
   * Handle publish request from Service Worker
   * Uses websocketService to route events to Service Worker
   */
  private async handlePublishRequest(event: Event, relays: string[]): Promise<void> {
    try {
      console.warn('[SWSyncHandler] Executing publish request for event:', event.id)
      const { websocketService } = await import('./websocketService')
      const { publishLog } = await import('./publishLog')

      // Publish to specified relays via websocketService (routes to Service Worker)
      const statuses = await websocketService.publishEvent(event, relays)
      const successfulRelays = logPublishStatuses({ publishLog, eventId: event.id, relays, statuses })

      // Update published status in IndexedDB
      await updatePublishedStatusUnsafe(event.id, successfulRelays.length > 0 ? successfulRelays : false)
    } catch (error) {
      console.error('[SWSyncHandler] Error in publish request:', error)
    }
  }
}

export const swSyncHandler = new ServiceWorkerSyncHandler()

function logPublishStatuses(params: {
  publishLog: { logPublication: (params: { eventId: string; relayUrl: string; success: boolean; error?: string }) => Promise<void> }
  eventId: string
  relays: string[]
  statuses: Array<{ success: boolean; error?: string }>
}): string[] {
  const successfulRelays: string[] = []
  params.statuses.forEach((status, index) => {
    const relayUrl = params.relays[index]
    if (!relayUrl) {
      return
    }
    if (status.success) {
      successfulRelays.push(relayUrl)
      void params.publishLog.logPublication({ eventId: params.eventId, relayUrl, success: true })
      return
    }
    const errorMessage = status.error ?? 'Unknown error'
    console.error(`[SWSyncHandler] Relay ${relayUrl} failed:`, errorMessage)
    void params.publishLog.logPublication({ eventId: params.eventId, relayUrl, success: false, error: errorMessage })
  })
  return successfulRelays
}

async function updatePublishedStatusUnsafe(eventId: string, published: false | string[]): Promise<void> {
  const service = nostrService as unknown as { updatePublishedStatus: (eventId: string, published: false | string[]) => Promise<void> }
  await service.updatePublishedStatus(eventId, published)
}