/**
 * Synchronize user content (profile, series, publications) to IndexedDB cache
 * Called after key import to ensure all user content is cached locally
 */

import type { Event } from 'nostr-tools'
import { nostrService } from './nostr'
import { fetchAuthorPresentationFromPool } from './articlePublisherHelpersPresentation'
import { extractTagsFromEvent } from './nostrTagSystem'
import { extractSeriesFromEvent, extractPublicationFromEvent, extractPurchaseFromEvent, extractSponsoringFromEvent, extractReviewTipFromEvent } from './metadataExtractor'
import { objectCache } from './objectCache'
import { getLatestVersion } from './versionManager'
import { buildTagFilter } from './nostrTagSystemFilter'
import { getPrimaryRelaySync } from './config'
import { tryWithRelayRotation } from './relayRotation'
import { PLATFORM_SERVICE } from './platformConfig'
import { parseObjectId } from './urlGenerator'
import type { SimplePoolWithSub } from '@/types/nostr-tools-extended'

/**
 * Fetch all publications by an author and cache them
 */
async function fetchAndCachePublications(
  pool: SimplePoolWithSub,
  authorPubkey: string
): Promise<void> {
  const { getLastSyncDate } = await import('./syncStorage')
  const lastSyncDate = await getLastSyncDate()

  const filters = [
    {
      ...buildTagFilter({
        type: 'publication',
        authorPubkey,
        service: PLATFORM_SERVICE,
      }),
      since: lastSyncDate,
      limit: 1000, // Get all publications
    },
  ]

  // Try relays with rotation (no retry on failure, just move to next)
  const { createSubscription } = require('@/types/nostr-tools-extended')
  let sub: ReturnType<typeof createSubscription> | null = null
  let usedRelayUrl = ''

  try {
        const result = await tryWithRelayRotation(
      pool as unknown as import('nostr-tools').SimplePool,
      async (relayUrl, poolWithSub) => {
        usedRelayUrl = relayUrl
        // Notify progress manager that we're starting with a new relay (reset step counter)
        const { syncProgressManager } = await import('./syncProgressManager')
        const currentProgress = syncProgressManager.getProgress()
        if (currentProgress) {
          syncProgressManager.setProgress({
            ...currentProgress,
            currentStep: 0,
            currentRelay: relayUrl,
          })
        }
        return createSubscription(poolWithSub, [relayUrl], filters)
      },
      5000 // 5 second timeout per relay
    )
    sub = result
  } catch (rotationError) {
    // Fallback to primary relay if rotation fails
    usedRelayUrl = getPrimaryRelaySync()
    sub = createSubscription(pool, [usedRelayUrl], filters)
  }

  if (!sub) {
    throw new Error('Failed to create subscription')
  }

  const events: Event[] = []

  return new Promise<void>((resolve) => {
    let finished = false

    const done = async (): Promise<void> => {
      if (finished) {
        return
      }
      finished = true
      sub.unsub()

      // Group events by hash ID and cache the latest version of each
      const eventsByHashId = new Map<string, Event[]>()
      for (const event of events) {
        const tags = extractTagsFromEvent(event)
        if (tags.id) {
          // Extract hash from id (can be <hash>_<index>_<version> or just hash)
          const parsed = parseObjectId(tags.id)
          const hash = parsed.hash ?? tags.id
          if (!eventsByHashId.has(hash)) {
            eventsByHashId.set(hash, [])
          }
          eventsByHashId.get(hash)!.push(event)
        }
      }

      // Cache each publication
      for (const [_hash, hashEvents] of eventsByHashId.entries()) {
        const latestEvent = getLatestVersion(hashEvents)
        if (latestEvent) {
          const extracted = await extractPublicationFromEvent(latestEvent)
          if (extracted) {
            const publicationParsed = parseObjectId(extracted.id)
            const extractedHash = publicationParsed.hash ?? extracted.id
            const extractedIndex = publicationParsed.index ?? 0
            const tags = extractTagsFromEvent(latestEvent)
            await objectCache.set(
              'publication',
              extractedHash,
              latestEvent,
              extracted,
              tags.version ?? 0,
              tags.hidden ?? false,
              extractedIndex
            )
          }
        }
      }

      resolve()
    }

    sub.on('event', (event: Event): void => {
      const tags = extractTagsFromEvent(event)
      if (tags.type === 'publication' && !tags.hidden) {
        events.push(event)
      }
    })

    sub.on('eose', (): void => {
      void done()
    })

    setTimeout((): void => {
      void done()
    }, 10000).unref?.()
  })
}

/**
 * Fetch all series by an author and cache them
 */
async function fetchAndCacheSeries(
  pool: SimplePoolWithSub,
  authorPubkey: string
): Promise<void> {
  const { getLastSyncDate } = await import('./syncStorage')
  const lastSyncDate = await getLastSyncDate()

  // Fetch all events for series to cache them properly
  const filters = [
    {
      ...buildTagFilter({
        type: 'series',
        authorPubkey,
        service: PLATFORM_SERVICE,
      }),
      since: lastSyncDate,
      limit: 1000, // Get all series events
    },
  ]

  // Try relays with rotation (no retry on failure, just move to next)
  const { createSubscription } = require('@/types/nostr-tools-extended')
  let sub: ReturnType<typeof createSubscription> | null = null
  let usedRelayUrl = ''

  try {
        const result = await tryWithRelayRotation(
      pool as unknown as import('nostr-tools').SimplePool,
      async (relayUrl, poolWithSub) => {
        usedRelayUrl = relayUrl
        // Notify progress manager that we're starting with a new relay (reset step counter)
        const { syncProgressManager } = await import('./syncProgressManager')
        const currentProgress = syncProgressManager.getProgress()
        if (currentProgress) {
          syncProgressManager.setProgress({
            ...currentProgress,
            currentStep: 0,
            currentRelay: relayUrl,
          })
        }
        return createSubscription(poolWithSub, [relayUrl], filters)
      },
      5000 // 5 second timeout per relay
    )
    sub = result
  } catch (rotationError) {
    // Fallback to primary relay if rotation fails
    usedRelayUrl = getPrimaryRelaySync()
    sub = createSubscription(pool, [usedRelayUrl], filters)
  }

  if (!sub) {
    throw new Error('Failed to create subscription')
  }

  const events: Event[] = []

  return new Promise<void>((resolve) => {
    let finished = false

    const done = async (): Promise<void> => {
      if (finished) {
        return
      }
      finished = true
      sub.unsub()

      // Group events by hash ID and cache the latest version of each
      const eventsByHashId = new Map<string, Event[]>()
      for (const event of events) {
        const tags = extractTagsFromEvent(event)
        if (tags.id) {
          // Extract hash from id (can be <hash>_<index>_<version> or just hash)
          const seriesParsed = parseObjectId(tags.id)
          const hash = seriesParsed.hash ?? tags.id
          if (!eventsByHashId.has(hash)) {
            eventsByHashId.set(hash, [])
          }
          eventsByHashId.get(hash)!.push(event)
        }
      }

      // Cache each series
      for (const [_hash, hashEvents] of eventsByHashId.entries()) {
        const latestEvent = getLatestVersion(hashEvents)
        if (latestEvent) {
          const extracted = await extractSeriesFromEvent(latestEvent)
          if (extracted) {
            const publicationParsed = parseObjectId(extracted.id)
            const extractedHash = publicationParsed.hash ?? extracted.id
            const extractedIndex = publicationParsed.index ?? 0
            const tags = extractTagsFromEvent(latestEvent)
            await objectCache.set(
              'series',
              extractedHash,
              latestEvent,
              extracted,
              tags.version ?? 0,
              tags.hidden ?? false,
              extractedIndex
            )
          }
        }
      }

      resolve()
    }

    sub.on('event', (event: Event): void => {
      const tags = extractTagsFromEvent(event)
      if (tags.type === 'series' && !tags.hidden) {
        console.warn('[Sync] Received series event:', event.id)
        events.push(event)
      }
    })

    sub.on('eose', (): void => {
      console.warn(`[Sync] EOSE for series, received ${events.length} events`)
      void done()
    })

    setTimeout((): void => {
      if (!finished) {
        console.warn(`[Sync] Timeout for series, received ${events.length} events`)
      }
      void done()
    }, 10000).unref?.()
  })
}

/**
 * Fetch all purchases by a payer and cache them
 */
async function fetchAndCachePurchases(
  pool: SimplePoolWithSub,
  payerPubkey: string
): Promise<void> {
  const { getLastSyncDate } = await import('./syncStorage')
  const lastSyncDate = await getLastSyncDate()

  const filters = [
    {
      kinds: [9735], // Zap receipt
      authors: [payerPubkey],
      '#kind_type': ['purchase'],
      since: lastSyncDate,
      limit: 1000,
    },
  ]

  // Try relays with rotation (no retry on failure, just move to next)
  const { createSubscription } = require('@/types/nostr-tools-extended')
  let sub: ReturnType<typeof createSubscription> | null = null
  let usedRelayUrl = ''

  try {
        const result = await tryWithRelayRotation(
      pool as unknown as import('nostr-tools').SimplePool,
      async (relayUrl, poolWithSub) => {
        usedRelayUrl = relayUrl
        // Notify progress manager that we're starting with a new relay (reset step counter)
        const { syncProgressManager } = await import('./syncProgressManager')
        const currentProgress = syncProgressManager.getProgress()
        if (currentProgress) {
          syncProgressManager.setProgress({
            ...currentProgress,
            currentStep: 0,
            currentRelay: relayUrl,
          })
        }
        return createSubscription(poolWithSub, [relayUrl], filters)
      },
      5000 // 5 second timeout per relay
    )
    sub = result
  } catch (rotationError) {
    // Fallback to primary relay if rotation fails
    usedRelayUrl = getPrimaryRelaySync()
    sub = createSubscription(pool, [usedRelayUrl], filters)
  }

  if (!sub) {
    throw new Error('Failed to create subscription')
  }

  const events: Event[] = []

  return new Promise<void>((resolve) => {
    let finished = false

    const done = async (): Promise<void> => {
      if (finished) {
        return
      }
      finished = true
      sub.unsub()

      for (const event of events) {
        const extracted = await extractPurchaseFromEvent(event)
        if (extracted) {
          // Parse to Purchase object for cache
          const { parsePurchaseFromEvent } = await import('./nostrEventParsing')
          const purchase = await parsePurchaseFromEvent(event)
          if (purchase) {
            await objectCache.set('purchase', purchase.hash, event, purchase, 0, false, purchase.index)
          }
        }
      }

      resolve()
    }

    sub.on('event', (event: Event): void => {
      console.log('[Sync] Received purchase event:', event.id)
      events.push(event)
    })

    sub.on('eose', (): void => {
      console.log(`[Sync] EOSE for purchases, received ${events.length} events`)
      void done()
    })

    setTimeout((): void => {
      if (!finished) {
        console.log(`[Sync] Timeout for purchases, received ${events.length} events`)
      }
      void done()
    }, 10000).unref?.()
  })
}

/**
 * Fetch all sponsoring by an author and cache them
 */
async function fetchAndCacheSponsoring(
  pool: SimplePoolWithSub,
  authorPubkey: string
): Promise<void> {
  const { getLastSyncDate } = await import('./syncStorage')
  const lastSyncDate = await getLastSyncDate()

  const filters = [
    {
      kinds: [9735], // Zap receipt
      '#p': [authorPubkey],
      '#kind_type': ['sponsoring'],
      since: lastSyncDate,
      limit: 1000,
    },
  ]

  // Try relays with rotation (no retry on failure, just move to next)
  const { createSubscription } = require('@/types/nostr-tools-extended')
  let sub: ReturnType<typeof createSubscription> | null = null
  let usedRelayUrl = ''

  try {
        const result = await tryWithRelayRotation(
      pool as unknown as import('nostr-tools').SimplePool,
      async (relayUrl, poolWithSub) => {
        usedRelayUrl = relayUrl
        // Notify progress manager that we're starting with a new relay (reset step counter)
        const { syncProgressManager } = await import('./syncProgressManager')
        const currentProgress = syncProgressManager.getProgress()
        if (currentProgress) {
          syncProgressManager.setProgress({
            ...currentProgress,
            currentStep: 0,
            currentRelay: relayUrl,
          })
        }
        return createSubscription(poolWithSub, [relayUrl], filters)
      },
      5000 // 5 second timeout per relay
    )
    sub = result
  } catch (rotationError) {
    // Fallback to primary relay if rotation fails
    usedRelayUrl = getPrimaryRelaySync()
    sub = createSubscription(pool, [usedRelayUrl], filters)
  }

  if (!sub) {
    throw new Error('Failed to create subscription')
  }

  const events: Event[] = []

  return new Promise<void>((resolve) => {
    let finished = false

    const done = async (): Promise<void> => {
      if (finished) {
        return
      }
      finished = true
      sub.unsub()

      for (const event of events) {
        const extracted = await extractSponsoringFromEvent(event)
        if (extracted) {
          // Parse to Sponsoring object for cache
          const { parseSponsoringFromEvent } = await import('./nostrEventParsing')
          const sponsoring = await parseSponsoringFromEvent(event)
          if (sponsoring) {
            await objectCache.set('sponsoring', sponsoring.hash, event, sponsoring, 0, false, sponsoring.index)
          }
        }
      }

      resolve()
    }

    sub.on('event', (event: Event): void => {
      console.log('[Sync] Received sponsoring event:', event.id)
      events.push(event)
    })

    sub.on('eose', (): void => {
      console.log(`[Sync] EOSE for sponsoring, received ${events.length} events`)
      void done()
    })

    setTimeout((): void => {
      if (!finished) {
        console.log(`[Sync] Timeout for sponsoring, received ${events.length} events`)
      }
      void done()
    }, 10000).unref?.()
  })
}

/**
 * Fetch all review tips by an author and cache them
 */
async function fetchAndCacheReviewTips(
  pool: SimplePoolWithSub,
  authorPubkey: string
): Promise<void> {
  const { getLastSyncDate } = await import('./syncStorage')
  const lastSyncDate = await getLastSyncDate()

  const filters = [
    {
      kinds: [9735], // Zap receipt
      '#p': [authorPubkey],
      '#kind_type': ['review_tip'],
      since: lastSyncDate,
      limit: 1000,
    },
  ]

  // Try relays with rotation (no retry on failure, just move to next)
  const { createSubscription } = require('@/types/nostr-tools-extended')
  let sub: ReturnType<typeof createSubscription> | null = null
  let usedRelayUrl = ''

  try {
        const result = await tryWithRelayRotation(
      pool as unknown as import('nostr-tools').SimplePool,
      async (relayUrl, poolWithSub) => {
        usedRelayUrl = relayUrl
        // Notify progress manager that we're starting with a new relay (reset step counter)
        const { syncProgressManager } = await import('./syncProgressManager')
        const currentProgress = syncProgressManager.getProgress()
        if (currentProgress) {
          syncProgressManager.setProgress({
            ...currentProgress,
            currentStep: 0,
            currentRelay: relayUrl,
          })
        }
        return createSubscription(poolWithSub, [relayUrl], filters)
      },
      5000 // 5 second timeout per relay
    )
    sub = result
  } catch (rotationError) {
    // Fallback to primary relay if rotation fails
    usedRelayUrl = getPrimaryRelaySync()
    sub = createSubscription(pool, [usedRelayUrl], filters)
  }

  if (!sub) {
    throw new Error('Failed to create subscription')
  }

  const events: Event[] = []

  return new Promise<void>((resolve) => {
    let finished = false

    const done = async (): Promise<void> => {
      if (finished) {
        return
      }
      finished = true
      sub.unsub()

      for (const event of events) {
        const extracted = await extractReviewTipFromEvent(event)
        if (extracted) {
          // Parse to ReviewTip object for cache
          const { parseReviewTipFromEvent } = await import('./nostrEventParsing')
          const reviewTip = await parseReviewTipFromEvent(event)
          if (reviewTip) {
            await objectCache.set('review_tip', reviewTip.hash, event, reviewTip, 0, false, reviewTip.index)
          }
        }
      }

      resolve()
    }

    sub.on('event', (event: Event): void => {
      console.log('[Sync] Received review tip event:', event.id)
      events.push(event)
    })

    sub.on('eose', (): void => {
      console.log(`[Sync] EOSE for review tips, received ${events.length} events`)
      void done()
    })

    setTimeout((): void => {
      if (!finished) {
        console.log(`[Sync] Timeout for review tips, received ${events.length} events`)
      }
      void done()
    }, 10000).unref?.()
  })
}

export interface SyncProgress {
  currentStep: number
  totalSteps: number
  completed: boolean
  currentRelay?: string // URL of the relay currently being used
}

/**
 * Fetch all payment notes (kind 1 with type='payment') by a user and cache them
 */
async function fetchAndCachePaymentNotes(
  pool: SimplePoolWithSub,
  userPubkey: string
): Promise<void> {
  const { getLastSyncDate } = await import('./syncStorage')
  const lastSyncDate = await getLastSyncDate()

  // Payment notes are kind 1 with type='payment'
  // They can be: as payer (authors) or as recipient (#recipient tag)
  const filters = [
    {
      kinds: [1],
      authors: [userPubkey],
      '#payment': [''],
      '#service': [PLATFORM_SERVICE],
      since: lastSyncDate,
      limit: 1000,
    },
    {
      kinds: [1],
      '#recipient': [userPubkey],
      '#payment': [''],
      '#service': [PLATFORM_SERVICE],
      since: lastSyncDate,
      limit: 1000,
    },
  ]

  // Try relays with rotation (no retry on failure, just move to next)
  const { createSubscription } = require('@/types/nostr-tools-extended')
  let subscriptions: Array<ReturnType<typeof createSubscription>> = []
  let usedRelayUrl = ''

  try {
    const result = await tryWithRelayRotation(
      pool as unknown as import('nostr-tools').SimplePool,
      async (relayUrl, poolWithSub) => {
        usedRelayUrl = relayUrl
        // Notify progress manager that we're starting with a new relay (reset step counter)
        const { syncProgressManager } = await import('./syncProgressManager')
        const currentProgress = syncProgressManager.getProgress()
        if (currentProgress) {
          syncProgressManager.setProgress({
            ...currentProgress,
            currentStep: 0,
            currentRelay: relayUrl,
          })
        }
        // Create subscriptions for both filters (payer and recipient)
        return filters.map((filter) => createSubscription(poolWithSub, [relayUrl], [filter]))
      },
      5000 // 5 second timeout per relay
    )
    subscriptions = result.flat()
  } catch (rotationError) {
    // Fallback to primary relay if rotation fails
    usedRelayUrl = getPrimaryRelaySync()
    subscriptions = filters.map((filter) => createSubscription(pool, [usedRelayUrl], [filter]))
  }

  if (subscriptions.length === 0) {
    throw new Error('Failed to create subscriptions')
  }

  const events: Event[] = []

  return new Promise<void>((resolve) => {
    let finished = false
    let eoseCount = 0

    const done = async (): Promise<void> => {
      if (finished) {
        return
      }
      finished = true
      subscriptions.forEach((sub) => sub.unsub())

      for (const event of events) {
        const tags = extractTagsFromEvent(event)
        if (tags.type === 'payment' && tags.payment) {
          // Cache the payment note event
          // Use event.id as hash since payment notes don't have a separate hash system
          await objectCache.set('payment_note', event.id, event, {
            id: event.id,
            type: 'payment_note',
            eventId: event.id,
          }, 0, false, 0)
        }
      }

      resolve()
    }

    subscriptions.forEach((sub) => {
      sub.on('event', (event: Event): void => {
        const tags = extractTagsFromEvent(event)
        if (tags.type === 'payment' && tags.payment) {
          console.log('[Sync] Received payment note event:', event.id)
          // Deduplicate events (same event might match both filters)
          if (!events.some((e) => e.id === event.id)) {
            events.push(event)
          }
        }
      })

      sub.on('eose', (): void => {
        eoseCount++
        if (eoseCount >= subscriptions.length) {
          console.log(`[Sync] EOSE for payment notes, received ${events.length} events`)
          void done()
        }
      })
    })

    setTimeout((): void => {
      if (!finished) {
        console.log(`[Sync] Timeout for payment notes, received ${events.length} events`)
      }
      void done()
    }, 10000).unref?.()
  })
}

/**
 * Synchronize all user content to IndexedDB cache
 * Fetches profile, series, publications, purchases, sponsoring, review tips, and payment notes and caches them
 * @param userPubkey - The user's public key
 * @param onProgress - Optional callback to report progress (currentStep, totalSteps, completed)
 */
export async function syncUserContentToCache(
  userPubkey: string,
  onProgress?: (progress: SyncProgress) => void
): Promise<void> {
  try {
    const pool = nostrService.getPool()
    if (!pool) {
      const errorMsg = 'Pool not initialized, cannot sync user content'
      console.warn(errorMsg)
      throw new Error(errorMsg)
    }

    const poolWithSub = pool as unknown as SimplePoolWithSub

    // Get current timestamp for last sync date
    const { setLastSyncDate, getCurrentTimestamp } = await import('./syncStorage')
    const currentTimestamp = getCurrentTimestamp()

    const TOTAL_STEPS = 7

    // Report initial progress
    const { relaySessionManager } = await import('./relaySessionManager')
    const { syncProgressManager } = await import('./syncProgressManager')
    const activeRelays = await relaySessionManager.getActiveRelays()
    const initialRelay = activeRelays[0] ?? 'Connecting...'

    if (onProgress) {
      onProgress({ currentStep: 0, totalSteps: TOTAL_STEPS, completed: false, currentRelay: initialRelay })
    }
    syncProgressManager.setProgress({ currentStep: 0, totalSteps: TOTAL_STEPS, completed: false, currentRelay: initialRelay })

    let currentStep = 0

    // Helper function to update progress with current relay
    const updateProgress = (step: number, completed: boolean = false): void => {
      const currentRelay = syncProgressManager.getProgress()?.currentRelay ?? initialRelay
      const progressUpdate = { currentStep: step, totalSteps: TOTAL_STEPS, completed, currentRelay }
      if (onProgress) {
        onProgress(progressUpdate)
      }
      syncProgressManager.setProgress(progressUpdate)
    }

    // Fetch and cache author profile (already caches itself)
    console.log('[Sync] Step 1/7: Fetching author profile...')
    await fetchAuthorPresentationFromPool(poolWithSub, userPubkey)
    console.log('[Sync] Step 1/7: Author profile fetch completed')
    currentStep++
    updateProgress(currentStep)

    // Fetch and cache all series
    console.log('[Sync] Step 2/7: Fetching series...')
    await fetchAndCacheSeries(poolWithSub, userPubkey)
    currentStep++
    updateProgress(currentStep)

    // Fetch and cache all publications
    console.log('[Sync] Step 3/7: Fetching publications...')
    await fetchAndCachePublications(poolWithSub, userPubkey)
    currentStep++
    updateProgress(currentStep)

    // Fetch and cache all purchases (as payer)
    console.log('[Sync] Step 4/7: Fetching purchases...')
    await fetchAndCachePurchases(poolWithSub, userPubkey)
    currentStep++
    updateProgress(currentStep)

    // Fetch and cache all sponsoring (as author)
    console.log('[Sync] Step 5/7: Fetching sponsoring...')
    await fetchAndCacheSponsoring(poolWithSub, userPubkey)
    currentStep++
    updateProgress(currentStep)

    // Fetch and cache all review tips (as author)
    console.log('[Sync] Step 6/7: Fetching review tips...')
    await fetchAndCacheReviewTips(poolWithSub, userPubkey)
    currentStep++
    updateProgress(currentStep)

    // Fetch and cache all payment notes (kind 1 with type='payment')
    console.log('[Sync] Step 7/7: Fetching payment notes...')
    await fetchAndCachePaymentNotes(poolWithSub, userPubkey)
    currentStep++
    updateProgress(currentStep, true)

    // Store the current timestamp as last sync date
    await setLastSyncDate(currentTimestamp)
    console.log('[Sync] Synchronization completed successfully')
  } catch (syncError) {
    console.error('Error syncing user content to cache:', syncError)
    throw syncError // Re-throw to allow UI to handle it
  }
}