import { ExtendedKind } from '@/constants'
import { tagNameEquals } from '@/lib/tag'
import { TRelayInfo } from '@/types'
import { Event, kinds } from 'nostr-tools'
import { isReplaceableEvent } from '@/lib/event'
import logger from '@/lib/logger'

type TValue<T = any> = {
  key: string
  value: T | null
  addedAt: number
  masterPublicationKey?: string // For nested publication events, link to master publication
}

export const StoreNames = {
  PROFILE_EVENTS: 'profileEvents',
  RELAY_LIST_EVENTS: 'relayListEvents',
  FOLLOW_LIST_EVENTS: 'followListEvents',
  MUTE_LIST_EVENTS: 'muteListEvents',
  BOOKMARK_LIST_EVENTS: 'bookmarkListEvents',
  PIN_LIST_EVENTS: 'pinListEvents',
  BLOSSOM_SERVER_LIST_EVENTS: 'blossomServerListEvents',
  INTEREST_LIST_EVENTS: 'interestListEvents',
  MUTE_DECRYPTED_TAGS: 'muteDecryptedTags',
  USER_EMOJI_LIST_EVENTS: 'userEmojiListEvents',
  EMOJI_SET_EVENTS: 'emojiSetEvents',
  FAVORITE_RELAYS: 'favoriteRelays',
  BLOCKED_RELAYS_EVENTS: 'blockedRelaysEvents',
  CACHE_RELAYS_EVENTS: 'cacheRelaysEvents',
  RSS_FEED_LIST_EVENTS: 'rssFeedListEvents',
  RSS_FEED_ITEMS: 'rssFeedItems',
  RELAY_SETS: 'relaySets',
  FOLLOWING_FAVORITE_RELAYS: 'followingFavoriteRelays',
  RELAY_INFOS: 'relayInfos',
  RELAY_INFO_EVENTS: 'relayInfoEvents', // deprecated
  PUBLICATION_EVENTS: 'publicationEvents'
}

class IndexedDbService {
  static instance: IndexedDbService
  static getInstance(): IndexedDbService {
    if (!IndexedDbService.instance) {
      IndexedDbService.instance = new IndexedDbService()
      IndexedDbService.instance.init()
    }
    return IndexedDbService.instance
  }

  private db: IDBDatabase | null = null
  private initPromise: Promise<void> | null = null

  init(): Promise<void> {
    if (!this.initPromise) {
      this.initPromise = new Promise((resolve, reject) => {
        const request = window.indexedDB.open('jumble', 17)

        request.onerror = (event) => {
          reject(event)
        }

        request.onsuccess = () => {
          this.db = request.result
          resolve()
        }

        request.onupgradeneeded = (event) => {
          const db = (event.target as IDBOpenDBRequest).result
          if (!db.objectStoreNames.contains(StoreNames.PROFILE_EVENTS)) {
            db.createObjectStore(StoreNames.PROFILE_EVENTS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.RELAY_LIST_EVENTS)) {
            db.createObjectStore(StoreNames.RELAY_LIST_EVENTS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.FOLLOW_LIST_EVENTS)) {
            db.createObjectStore(StoreNames.FOLLOW_LIST_EVENTS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.MUTE_LIST_EVENTS)) {
            db.createObjectStore(StoreNames.MUTE_LIST_EVENTS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.BOOKMARK_LIST_EVENTS)) {
            db.createObjectStore(StoreNames.BOOKMARK_LIST_EVENTS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.PIN_LIST_EVENTS)) {
            db.createObjectStore(StoreNames.PIN_LIST_EVENTS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.INTEREST_LIST_EVENTS)) {
            db.createObjectStore(StoreNames.INTEREST_LIST_EVENTS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.MUTE_DECRYPTED_TAGS)) {
            db.createObjectStore(StoreNames.MUTE_DECRYPTED_TAGS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.FAVORITE_RELAYS)) {
            db.createObjectStore(StoreNames.FAVORITE_RELAYS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.BLOCKED_RELAYS_EVENTS)) {
            db.createObjectStore(StoreNames.BLOCKED_RELAYS_EVENTS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.RELAY_SETS)) {
            db.createObjectStore(StoreNames.RELAY_SETS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.FOLLOWING_FAVORITE_RELAYS)) {
            db.createObjectStore(StoreNames.FOLLOWING_FAVORITE_RELAYS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.BLOSSOM_SERVER_LIST_EVENTS)) {
            db.createObjectStore(StoreNames.BLOSSOM_SERVER_LIST_EVENTS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.USER_EMOJI_LIST_EVENTS)) {
            db.createObjectStore(StoreNames.USER_EMOJI_LIST_EVENTS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.EMOJI_SET_EVENTS)) {
            db.createObjectStore(StoreNames.EMOJI_SET_EVENTS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.RELAY_INFOS)) {
            db.createObjectStore(StoreNames.RELAY_INFOS, { keyPath: 'key' })
          }
          if (db.objectStoreNames.contains(StoreNames.RELAY_INFO_EVENTS)) {
            db.deleteObjectStore(StoreNames.RELAY_INFO_EVENTS)
          }
          if (!db.objectStoreNames.contains(StoreNames.PUBLICATION_EVENTS)) {
            db.createObjectStore(StoreNames.PUBLICATION_EVENTS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.CACHE_RELAYS_EVENTS)) {
            db.createObjectStore(StoreNames.CACHE_RELAYS_EVENTS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.RSS_FEED_LIST_EVENTS)) {
            db.createObjectStore(StoreNames.RSS_FEED_LIST_EVENTS, { keyPath: 'key' })
          }
          if (!db.objectStoreNames.contains(StoreNames.RSS_FEED_ITEMS)) {
            const store = db.createObjectStore(StoreNames.RSS_FEED_ITEMS, { keyPath: 'key' })
            store.createIndex('feedUrl', 'feedUrl', { unique: false })
            store.createIndex('pubDate', 'pubDate', { unique: false })
          }
        }
      })
      setTimeout(() => this.cleanUp(), 1000 * 60) // 1 minute
    }
    return this.initPromise
  }

  async putNullReplaceableEvent(pubkey: string, kind: number, d?: string) {
    const storeName = this.getStoreNameByKind(kind)
    if (!storeName) {
      return Promise.reject('store name not found')
    }
    await this.initPromise
    return new Promise((resolve, reject) => {
      if (!this.db) {
        return reject('database not initialized')
      }
      const transaction = this.db.transaction(storeName, 'readwrite')
      const store = transaction.objectStore(storeName)

      const key = this.getReplaceableEventKey(pubkey, d)
      const getRequest = store.get(key)
      getRequest.onsuccess = () => {
        const oldValue = getRequest.result as TValue<Event> | undefined
        if (oldValue) {
          transaction.commit()
          return resolve(oldValue.value)
        }
        const putRequest = store.put(this.formatValue(key, null))
        putRequest.onsuccess = () => {
          transaction.commit()
          resolve(null)
        }

        putRequest.onerror = (event) => {
          transaction.commit()
          reject(event)
        }
      }

      getRequest.onerror = (event) => {
        transaction.commit()
        reject(event)
      }
    })
  }

  async putReplaceableEvent(event: Event): Promise<Event> {
    // Remove relayStatuses before storing (it's metadata for logging, not part of the event)
    const cleanEvent = { ...event }
    delete (cleanEvent as any).relayStatuses
    
    const storeName = this.getStoreNameByKind(cleanEvent.kind)
    if (!storeName) {
      logger.error('[IndexedDB] Store name not found for kind', { kind: cleanEvent.kind })
      return Promise.reject('store name not found')
    }
    
    logger.debug('[IndexedDB] Putting replaceable event', {
      kind: cleanEvent.kind,
      storeName,
      eventId: cleanEvent.id?.substring(0, 8),
      pubkey: cleanEvent.pubkey?.substring(0, 8),
      created_at: cleanEvent.created_at,
      fullEventId: cleanEvent.id
    })
    
    await this.initPromise
    
    // Wait a bit for database upgrade to complete if store doesn't exist
    if (this.db && !this.db.objectStoreNames.contains(storeName)) {
      logger.warn('[IndexedDB] Store not found, waiting for database upgrade', { storeName })
      // Wait up to 2 seconds for store to be created (database upgrade)
      let retries = 20
      while (retries > 0 && this.db && !this.db.objectStoreNames.contains(storeName)) {
        await new Promise(resolve => setTimeout(resolve, 100))
        retries--
      }
    }
    
    return new Promise((resolve, reject) => {
      if (!this.db) {
        logger.error('[IndexedDB] Database not initialized', { storeName, kind: cleanEvent.kind })
        return reject('database not initialized')
      }
      
      // Check if the store exists before trying to access it
      if (!this.db.objectStoreNames.contains(storeName)) {
        logger.error('[IndexedDB] Store not found in database after waiting', {
          storeName,
          kind: cleanEvent.kind,
          availableStores: Array.from(this.db.objectStoreNames),
          dbVersion: this.db.version
        })
        logger.error('[IndexedDB] Store not found in database after waiting', { 
          storeName,
          kind: cleanEvent.kind,
          availableStores: Array.from(this.db.objectStoreNames) 
        })
        // Return the event anyway (don't reject) - caching is optional
        return resolve(cleanEvent)
      }
      
      logger.debug('[IndexedDB] Store exists, proceeding with save', {
        storeName,
        kind: cleanEvent.kind,
        eventId: cleanEvent.id?.substring(0, 8),
        dbVersion: this.db.version,
        allStores: Array.from(this.db.objectStoreNames)
      })
      
      const transaction = this.db.transaction(storeName, 'readwrite')
      const store = transaction.objectStore(storeName)

      const key = this.getReplaceableEventKeyFromEvent(cleanEvent)
      logger.debug('[IndexedDB] Getting existing event', { storeName, key, eventId: cleanEvent.id?.substring(0, 8) })
      
      const getRequest = store.get(key)
      getRequest.onsuccess = () => {
        const oldValue = getRequest.result as TValue<Event> | undefined
        if (oldValue?.value) {
          logger.debug('[IndexedDB] Found existing event', { 
            storeName,
            key,
            oldEventId: oldValue.value.id?.substring(0, 8),
            oldCreatedAt: oldValue.value.created_at,
            newCreatedAt: cleanEvent.created_at,
            willUpdate: cleanEvent.created_at > oldValue.value.created_at 
          })
        } else {
          logger.debug('[IndexedDB] No existing event found', { storeName, key })
        }
        
        if (oldValue?.value && oldValue.value.created_at >= cleanEvent.created_at) {
          logger.debug('[IndexedDB] Keeping existing event (newer or same timestamp)', { 
            storeName,
            key,
            existingEventId: oldValue.value.id?.substring(0, 8) 
          })
          transaction.commit()
          return resolve(oldValue.value)
        }
        
        logger.debug('[IndexedDB] Putting new event', { 
          storeName, 
          key, 
          eventId: cleanEvent.id?.substring(0, 8), 
          fullEventId: cleanEvent.id,
          content: cleanEvent.content?.substring(0, 50) 
        })
        const putRequest = store.put(this.formatValue(key, cleanEvent))
        putRequest.onsuccess = () => {
          logger.debug('[IndexedDB] Successfully put event', { 
            storeName, 
            key, 
            eventId: cleanEvent.id?.substring(0, 8),
            content: cleanEvent.content?.substring(0, 50)
          })
          transaction.commit()
          resolve(cleanEvent)
        }

        putRequest.onerror = (event) => {
          logger.error('[IndexedDB] Error putting event!', { 
            storeName, 
            key, 
            error: event, 
            target: (event.target as any)?.error,
            errorMessage: (event.target as any)?.error?.message 
          })
          logger.error('[IndexedDB] Error putting event', { storeName, key, error: event })
          transaction.commit()
          reject(event)
        }
      }

      getRequest.onerror = (event) => {
        logger.error('[IndexedDB] Error getting existing event', { storeName, key, error: event })
        transaction.commit()
        reject(event)
      }
    })
  }

  async getReplaceableEvent(
    pubkey: string,
    kind: number,
    d?: string
  ): Promise<Event | undefined | null> {
    const storeName = this.getStoreNameByKind(kind)
    if (!storeName) {
      return Promise.reject('store name not found')
    }
    await this.initPromise
    return new Promise((resolve, reject) => {
      if (!this.db) {
        return reject('database not initialized')
      }
      // Check if the store exists before trying to access it
      if (!this.db.objectStoreNames.contains(storeName)) {
        logger.warn(`Store ${storeName} not found in database. Returning null.`)
        return resolve(null)
      }
      const transaction = this.db.transaction(storeName, 'readonly')
      const store = transaction.objectStore(storeName)
      const key = this.getReplaceableEventKey(pubkey, d)
      const request = store.get(key)

      request.onsuccess = () => {
        transaction.commit()
        resolve((request.result as TValue<Event>)?.value)
      }

      request.onerror = (event) => {
        transaction.commit()
        reject(event)
      }
    })
  }

  async getManyReplaceableEvents(
    pubkeys: readonly string[],
    kind: number
  ): Promise<(Event | undefined | null)[]> {
    const storeName = this.getStoreNameByKind(kind)
    if (!storeName) {
      return Promise.reject('store name not found')
    }
    await this.initPromise
    return new Promise((resolve, reject) => {
      if (!this.db) {
        return reject('database not initialized')
      }
      const transaction = this.db.transaction(storeName, 'readonly')
      const store = transaction.objectStore(storeName)
      const events: (Event | null)[] = new Array(pubkeys.length).fill(undefined)
      let count = 0
      pubkeys.forEach((pubkey, i) => {
        const request = store.get(this.getReplaceableEventKey(pubkey))

        request.onsuccess = () => {
          const event = (request.result as TValue<Event | null>)?.value
          if (event || event === null) {
            events[i] = event
          }

          if (++count === pubkeys.length) {
            transaction.commit()
            resolve(events)
          }
        }

        request.onerror = () => {
          if (++count === pubkeys.length) {
            transaction.commit()
            resolve(events)
          }
        }
      })
    })
  }

  async getMuteDecryptedTags(id: string): Promise<string[][] | null> {
    await this.initPromise
    return new Promise((resolve, reject) => {
      if (!this.db) {
        return reject('database not initialized')
      }
      const transaction = this.db.transaction(StoreNames.MUTE_DECRYPTED_TAGS, 'readonly')
      const store = transaction.objectStore(StoreNames.MUTE_DECRYPTED_TAGS)
      const request = store.get(id)

      request.onsuccess = () => {
        transaction.commit()
        resolve((request.result as TValue<string[][]>)?.value)
      }

      request.onerror = (event) => {
        transaction.commit()
        reject(event)
      }
    })
  }

  async putMuteDecryptedTags(id: string, tags: string[][]): Promise<void> {
    await this.initPromise
    return new Promise((resolve, reject) => {
      if (!this.db) {
        return reject('database not initialized')
      }
      const transaction = this.db.transaction(StoreNames.MUTE_DECRYPTED_TAGS, 'readwrite')
      const store = transaction.objectStore(StoreNames.MUTE_DECRYPTED_TAGS)

      const putRequest = store.put(this.formatValue(id, tags))
      putRequest.onsuccess = () => {
        transaction.commit()
        resolve()
      }

      putRequest.onerror = (event) => {
        transaction.commit()
        reject(event)
      }
    })
  }

  async iterateProfileEvents(callback: (event: Event) => Promise<void>): Promise<void> {
    await this.initPromise
    if (!this.db) {
      return
    }

    return new Promise<void>((resolve, reject) => {
      const transaction = this.db!.transaction(StoreNames.PROFILE_EVENTS, 'readwrite')
      const store = transaction.objectStore(StoreNames.PROFILE_EVENTS)
      const request = store.openCursor()
      request.onsuccess = (event) => {
        const cursor = (event.target as IDBRequest).result
        if (cursor) {
          const value = (cursor.value as TValue<Event>).value
          if (value) {
            callback(value)
          }
          cursor.continue()
        } else {
          transaction.commit()
          resolve()
        }
      }

      request.onerror = (event) => {
        transaction.commit()
        reject(event)
      }
    })
  }

  async putFollowingFavoriteRelays(pubkey: string, relays: [string, string[]][]): Promise<void> {
    await this.initPromise
    return new Promise((resolve, reject) => {
      if (!this.db) {
        return reject('database not initialized')
      }
      const transaction = this.db.transaction(StoreNames.FOLLOWING_FAVORITE_RELAYS, 'readwrite')
      const store = transaction.objectStore(StoreNames.FOLLOWING_FAVORITE_RELAYS)

      const putRequest = store.put(this.formatValue(pubkey, relays))
      putRequest.onsuccess = () => {
        transaction.commit()
        resolve()
      }

      putRequest.onerror = (event) => {
        transaction.commit()
        reject(event)
      }
    })
  }

  async getFollowingFavoriteRelays(pubkey: string): Promise<[string, string[]][] | null> {
    await this.initPromise
    return new Promise((resolve, reject) => {
      if (!this.db) {
        return reject('database not initialized')
      }
      const transaction = this.db.transaction(StoreNames.FOLLOWING_FAVORITE_RELAYS, 'readonly')
      const store = transaction.objectStore(StoreNames.FOLLOWING_FAVORITE_RELAYS)
      const request = store.get(pubkey)

      request.onsuccess = () => {
        transaction.commit()
        resolve((request.result as TValue<[string, string[]][]>)?.value)
      }

      request.onerror = (event) => {
        transaction.commit()
        reject(event)
      }
    })
  }

  async putRelayInfo(relayInfo: TRelayInfo): Promise<void> {
    await this.initPromise
    return new Promise((resolve, reject) => {
      if (!this.db) {
        return reject('database not initialized')
      }
      const transaction = this.db.transaction(StoreNames.RELAY_INFOS, 'readwrite')
      const store = transaction.objectStore(StoreNames.RELAY_INFOS)

      const putRequest = store.put(this.formatValue(relayInfo.url, relayInfo))
      putRequest.onsuccess = () => {
        transaction.commit()
        resolve()
      }

      putRequest.onerror = (event) => {
        transaction.commit()
        reject(event)
      }
    })
  }

  async getRelayInfo(url: string): Promise<TRelayInfo | null> {
    await this.initPromise
    return new Promise((resolve, reject) => {
      if (!this.db) {
        return reject('database not initialized')
      }
      const transaction = this.db.transaction(StoreNames.RELAY_INFOS, 'readonly')
      const store = transaction.objectStore(StoreNames.RELAY_INFOS)
      const request = store.get(url)

      request.onsuccess = () => {
        transaction.commit()
        resolve((request.result as TValue<TRelayInfo>)?.value)
      }

      request.onerror = (event) => {
        transaction.commit()
        reject(event)
      }
    })
  }

  private getReplaceableEventKeyFromEvent(event: Event): string {
    // Events that are replaceable by pubkey only (no d-tag)
    // RSS_FEED_LIST (10895) is in the 10000-20000 range, so it's automatically handled
    if (
      [kinds.Metadata, kinds.Contacts].includes(event.kind) ||
      (event.kind >= 10000 && event.kind < 20000 && event.kind !== ExtendedKind.PUBLICATION && event.kind !== ExtendedKind.PUBLICATION_CONTENT && event.kind !== ExtendedKind.WIKI_ARTICLE && event.kind !== ExtendedKind.WIKI_ARTICLE_MARKDOWN && event.kind !== kinds.LongFormArticle)
    ) {
      return this.getReplaceableEventKey(event.pubkey)
    }

    // Publications and their nested content are replaceable by pubkey + d-tag
    const [, d] = event.tags.find(tagNameEquals('d')) ?? []
    return this.getReplaceableEventKey(event.pubkey, d)
  }

  private getReplaceableEventKey(pubkey: string, d?: string): string {
    return d === undefined ? pubkey : `${pubkey}:${d}`
  }

  private getStoreNameByKind(kind: number): string | undefined {
    switch (kind) {
      case kinds.Metadata:
        return StoreNames.PROFILE_EVENTS
      case kinds.RelayList:
        return StoreNames.RELAY_LIST_EVENTS
      case kinds.Contacts:
        return StoreNames.FOLLOW_LIST_EVENTS
      case kinds.Mutelist:
        return StoreNames.MUTE_LIST_EVENTS
      case kinds.BookmarkList:
        return StoreNames.BOOKMARK_LIST_EVENTS
      case 10001: // Pin list
        return StoreNames.PIN_LIST_EVENTS
      case 10015: // Interest list
        return StoreNames.INTEREST_LIST_EVENTS
      case ExtendedKind.BLOSSOM_SERVER_LIST:
        return StoreNames.BLOSSOM_SERVER_LIST_EVENTS
      case kinds.Relaysets:
        return StoreNames.RELAY_SETS
      case ExtendedKind.FAVORITE_RELAYS:
        return StoreNames.FAVORITE_RELAYS
      case ExtendedKind.BLOCKED_RELAYS:
        return StoreNames.BLOCKED_RELAYS_EVENTS
      case ExtendedKind.CACHE_RELAYS:
        return StoreNames.CACHE_RELAYS_EVENTS
      case ExtendedKind.RSS_FEED_LIST:
        return StoreNames.RSS_FEED_LIST_EVENTS
      case kinds.UserEmojiList:
        return StoreNames.USER_EMOJI_LIST_EVENTS
      case kinds.Emojisets:
        return StoreNames.EMOJI_SET_EVENTS
      case ExtendedKind.PUBLICATION:
      case ExtendedKind.PUBLICATION_CONTENT:
      case ExtendedKind.WIKI_ARTICLE:
      case kinds.LongFormArticle:
        return StoreNames.PUBLICATION_EVENTS
      default:
        return undefined
    }
  }

  async putPublicationWithNestedEvents(masterEvent: Event, nestedEvents: Event[]): Promise<Event> {
    // Store master publication as replaceable event
    const masterKey = this.getReplaceableEventKeyFromEvent(masterEvent)
    await this.putReplaceableEvent(masterEvent)
    
    // Store nested events, linking them to the master
    for (const nestedEvent of nestedEvents) {
      // Check if this is a replaceable event kind
      if (isReplaceableEvent(nestedEvent.kind)) {
        await this.putReplaceableEventWithMaster(nestedEvent, masterKey)
      } else {
        // For non-replaceable events, store by event ID with master link
        await this.putNonReplaceableEventWithMaster(nestedEvent, masterKey)
      }
    }
    
    return masterEvent
  }

  private async putReplaceableEventWithMaster(event: Event, masterKey: string): Promise<Event> {
    // Remove relayStatuses before storing (it's metadata for logging, not part of the event)
    const cleanEvent = { ...event }
    delete (cleanEvent as any).relayStatuses
    
    const storeName = this.getStoreNameByKind(cleanEvent.kind)
    if (!storeName) {
      return Promise.reject('store name not found')
    }
    await this.initPromise
    
    // Wait a bit for database upgrade to complete if store doesn't exist
    if (this.db && !this.db.objectStoreNames.contains(storeName)) {
      let retries = 20
      while (retries > 0 && this.db && !this.db.objectStoreNames.contains(storeName)) {
        await new Promise(resolve => setTimeout(resolve, 100))
        retries--
      }
    }
    
    return new Promise((resolve, reject) => {
      if (!this.db) {
        return reject('database not initialized')
      }
      if (!this.db.objectStoreNames.contains(storeName)) {
        logger.warn(`Store ${storeName} not found in database. Cannot save event.`)
        return resolve(cleanEvent)
      }
      const transaction = this.db.transaction(storeName, 'readwrite')
      const store = transaction.objectStore(storeName)

      const key = this.getReplaceableEventKeyFromEvent(cleanEvent)
      const getRequest = store.get(key)
      getRequest.onsuccess = () => {
        const oldValue = getRequest.result as TValue<Event> | undefined
        if (oldValue?.value && oldValue.value.created_at >= cleanEvent.created_at) {
          // Update master key link even if event is not newer
          if (oldValue.masterPublicationKey !== masterKey) {
            const value = this.formatValue(key, oldValue.value)
            value.masterPublicationKey = masterKey
            store.put(value)
          }
          transaction.commit()
          return resolve(oldValue.value)
        }
        // Store with master key link
        const value = this.formatValue(key, cleanEvent)
        value.masterPublicationKey = masterKey
        const putRequest = store.put(value)
        putRequest.onsuccess = () => {
          transaction.commit()
          resolve(cleanEvent)
        }

        putRequest.onerror = (event) => {
          transaction.commit()
          reject(event)
        }
      }

      getRequest.onerror = (event) => {
        transaction.commit()
        reject(event)
      }
    })
  }

  async putNonReplaceableEventWithMaster(event: Event, masterKey: string): Promise<Event> {
    // For non-replaceable events, store by event ID in publication events store
    const storeName = StoreNames.PUBLICATION_EVENTS
    await this.initPromise
    
    // Wait a bit for database upgrade to complete if store doesn't exist
    if (this.db && !this.db.objectStoreNames.contains(storeName)) {
      let retries = 20
      while (retries > 0 && this.db && !this.db.objectStoreNames.contains(storeName)) {
        await new Promise(resolve => setTimeout(resolve, 100))
        retries--
      }
    }
    
    return new Promise((resolve, reject) => {
      if (!this.db) {
        return reject('database not initialized')
      }
      if (!this.db.objectStoreNames.contains(storeName)) {
        logger.warn(`Store ${storeName} not found in database. Cannot save event.`)
        return resolve(event)
      }
      const transaction = this.db.transaction(storeName, 'readwrite')
      const store = transaction.objectStore(storeName)

      // For non-replaceable events, use event ID as key
      const key = event.id
      // For non-replaceable events, always update with master key link
      const value = this.formatValue(key, event)
      value.masterPublicationKey = masterKey
      const putRequest = store.put(value)
      putRequest.onsuccess = () => {
        transaction.commit()
        resolve(event)
      }

      putRequest.onerror = (event) => {
        transaction.commit()
        reject(event)
      }
    })
  }

  async getPublicationEvent(coordinate: string): Promise<Event | undefined> {
    // Parse coordinate (format: kind:pubkey:d-tag)
    const coordinateParts = coordinate.split(':')
    if (coordinateParts.length >= 2) {
      const kind = parseInt(coordinateParts[0])
      if (!isNaN(kind)) {
        const pubkey = coordinateParts[1]
        const d = coordinateParts[2] || undefined
        const event = await this.getReplaceableEvent(pubkey, kind, d)
        return event || undefined
      }
    }
    return Promise.resolve(undefined)
  }

  async getEventFromPublicationStore(eventId: string): Promise<Event | undefined> {
    // Get event from PUBLICATION_EVENTS store by event ID
    // This is used for non-replaceable events stored as part of publications
    await this.initPromise
    return new Promise((resolve, reject) => {
      if (!this.db) {
        return reject('database not initialized')
      }
      if (!this.db.objectStoreNames.contains(StoreNames.PUBLICATION_EVENTS)) {
        return resolve(undefined)
      }
      const transaction = this.db.transaction(StoreNames.PUBLICATION_EVENTS, 'readonly')
      const store = transaction.objectStore(StoreNames.PUBLICATION_EVENTS)
      const request = store.get(eventId)

      request.onsuccess = () => {
        transaction.commit()
        const result = request.result as TValue<Event> | undefined
        resolve(result?.value || undefined)
      }

      request.onerror = (event) => {
        transaction.commit()
        reject(event)
      }
    })
  }

  async getPublicationStoreItems(storeName: string): Promise<Array<{ key: string; value: any; addedAt: number; nestedCount?: number }>> {
    // For publication stores, only return master events with nested counts
    await this.initPromise
    if (!this.db || !this.db.objectStoreNames.contains(storeName)) {
      return []
    }

    return new Promise((resolve, reject) => {
      const transaction = this.db!.transaction(storeName, 'readonly')
      const store = transaction.objectStore(storeName)
      const request = store.openCursor()
      
      const masterEvents = new Map<string, { key: string; value: any; addedAt: number; nestedCount: number }>()
      const nestedEvents: Array<{ key: string; masterKey?: string }> = []

      request.onsuccess = () => {
        const cursor = (request as any).result
        if (cursor) {
          const item = cursor.value as TValue<Event>
          const key = cursor.key as string
          
          if (item?.value) {
            const event = item.value as Event
            // Check if this is a master publication (kind 30040) or a nested event
            if (event.kind === ExtendedKind.PUBLICATION && !item.masterPublicationKey) {
              // This is a master publication
              masterEvents.set(key, {
                key,
                value: event,
                addedAt: item.addedAt,
                nestedCount: 0
              })
            } else if (item.masterPublicationKey) {
              // This is a nested event - track it for counting
              nestedEvents.push({
                key,
                masterKey: item.masterPublicationKey
              })
            }
          }
          cursor.continue()
        } else {
          // Count nested events for each master
          nestedEvents.forEach(nested => {
            if (nested.masterKey && masterEvents.has(nested.masterKey)) {
              const master = masterEvents.get(nested.masterKey)!
              master.nestedCount++
            }
          })
          
          transaction.commit()
          resolve(Array.from(masterEvents.values()))
        }
      }

      request.onerror = (event) => {
        transaction.commit()
        reject(event)
      }
    })
  }

  async deletePublicationAndNestedEvents(pubkey: string, d?: string): Promise<{ deleted: number }> {
    const masterKey = this.getReplaceableEventKey(pubkey, d)
    const storeName = StoreNames.PUBLICATION_EVENTS
    
    await this.initPromise
    if (!this.db || !this.db.objectStoreNames.contains(storeName)) {
      return Promise.resolve({ deleted: 0 })
    }

    return new Promise((resolve, reject) => {
      const transaction = this.db!.transaction(storeName, 'readwrite')
      const store = transaction.objectStore(storeName)
      const request = store.openCursor()
      
      const keysToDelete: string[] = []

      request.onsuccess = (event) => {
        const cursor = (event.target as IDBRequest).result
        if (cursor) {
          const value = cursor.value as TValue<Event>
          const key = cursor.key as string
          
          // Delete if it's the master (matches masterKey) or linked to the master (has masterPublicationKey)
          if (key === masterKey || value?.masterPublicationKey === masterKey) {
            keysToDelete.push(key)
          }
          cursor.continue()
        } else {
          // Delete all identified keys
          let deletedCount = 0
          let completedCount = 0

          if (keysToDelete.length === 0) {
            transaction.commit()
            return resolve({ deleted: 0 })
          }

          keysToDelete.forEach(key => {
            const deleteRequest = store.delete(key)
            deleteRequest.onsuccess = () => {
              deletedCount++
              completedCount++
              if (completedCount === keysToDelete.length) {
                transaction.commit()
                resolve({ deleted: deletedCount })
              }
            }
            deleteRequest.onerror = () => {
              completedCount++
              if (completedCount === keysToDelete.length) {
                transaction.commit()
                resolve({ deleted: deletedCount })
              }
            }
          })
        }
      }

      request.onerror = (event) => {
        transaction.commit()
        reject(event)
      }
    })
  }

  private formatValue<T>(key: string, value: T): TValue<T> {
    return {
      key,
      value,
      addedAt: Date.now()
    }
  }

  async clearAllCache(): Promise<void> {
    await this.initPromise
    if (!this.db) {
      return
    }

    const allStoreNames = Array.from(this.db.objectStoreNames)
    const transaction = this.db.transaction(allStoreNames, 'readwrite')
    
    await Promise.allSettled(
      allStoreNames.map(storeName => {
        return new Promise<void>((resolve, reject) => {
          const store = transaction.objectStore(storeName)
          const request = store.clear()
          request.onsuccess = () => resolve()
          request.onerror = (event) => reject(event)
        })
      })
    )
  }

  async getStoreInfo(): Promise<Record<string, number>> {
    await this.initPromise
    if (!this.db) {
      return {}
    }

    const storeInfo: Record<string, number> = {}
    const allStoreNames = Array.from(this.db.objectStoreNames)
    
    await Promise.allSettled(
      allStoreNames.map(storeName => {
        return new Promise<void>((resolve, reject) => {
          const transaction = this.db!.transaction(storeName, 'readonly')
          const store = transaction.objectStore(storeName)
          const request = store.count()
          request.onsuccess = () => {
            storeInfo[storeName] = request.result
            resolve()
          }
          request.onerror = (event) => reject(event)
        })
      })
    )

    return storeInfo
  }

  async getStoreItems(storeName: string): Promise<TValue<any>[]> {
    await this.initPromise
    if (!this.db || !this.db.objectStoreNames.contains(storeName)) {
      return []
    }

    return new Promise((resolve, reject) => {
      const transaction = this.db!.transaction(storeName, 'readonly')
      const store = transaction.objectStore(storeName)
      const request = store.getAll()
      
      request.onsuccess = () => {
        transaction.commit()
        resolve(request.result as TValue<any>[])
      }
      
      request.onerror = (event) => {
        transaction.commit()
        reject(event)
      }
    })
  }

  async deleteStoreItem(storeName: string, key: string): Promise<void> {
    await this.initPromise
    if (!this.db || !this.db.objectStoreNames.contains(storeName)) {
      return Promise.reject('Store not found')
    }

    return new Promise((resolve, reject) => {
      const transaction = this.db!.transaction(storeName, 'readwrite')
      const store = transaction.objectStore(storeName)
      const request = store.delete(key)
      
      request.onsuccess = () => {
        transaction.commit()
        resolve()
      }
      
      request.onerror = (event) => {
        transaction.commit()
        reject(event)
      }
    })
  }

  async clearStore(storeName: string): Promise<void> {
    await this.initPromise
    if (!this.db || !this.db.objectStoreNames.contains(storeName)) {
      return Promise.reject('Store not found')
    }

    return new Promise((resolve, reject) => {
      const transaction = this.db!.transaction(storeName, 'readwrite')
      const store = transaction.objectStore(storeName)
      const request = store.clear()
      
      request.onsuccess = () => {
        transaction.commit()
        resolve()
      }
      
      request.onerror = (event) => {
        transaction.commit()
        reject(event)
      }
    })
  }

  async cleanupDuplicateReplaceableEvents(storeName: string): Promise<{ deleted: number; kept: number }> {
    await this.initPromise
    if (!this.db || !this.db.objectStoreNames.contains(storeName)) {
      return Promise.reject('Store not found')
    }

    // Get the kind for this store - only clean up replaceable event stores
    const kind = this.getKindByStoreName(storeName)
    if (!kind || !this.isReplaceableEventKind(kind)) {
      return Promise.reject('Not a replaceable event store')
    }

    // First pass: identify duplicates
    const allItems = await this.getStoreItems(storeName)
    const eventMap = new Map<string, { key: string; event: Event; addedAt: number }>()
    const keysToDelete: string[] = []
    let invalidItemsCount = 0

    for (const item of allItems) {
      if (!item || !item.value) {
        invalidItemsCount++
        continue
      }
      
      // Skip if event doesn't have required fields
      if (!item.value.pubkey || !item.value.kind || !item.value.created_at) {
        invalidItemsCount++
        continue
      }
      
      try {
        const replaceableKey = this.getReplaceableEventKeyFromEvent(item.value)
        const existing = eventMap.get(replaceableKey)
        
        if (!existing || 
            item.value.created_at > existing.event.created_at ||
            (item.value.created_at === existing.event.created_at && 
             item.addedAt > existing.addedAt)) {
          // This event is newer, mark the old one for deletion if it exists
          if (existing) {
            keysToDelete.push(existing.key)
          }
          eventMap.set(replaceableKey, {
            key: item.key,
            event: item.value,
            addedAt: item.addedAt
          })
        } else {
          // This event is older or same, mark it for deletion
          keysToDelete.push(item.key)
        }
      } catch (error) {
        // If we can't generate a replaceable key, skip this item
        logger.warn('Failed to get replaceable key for item', { key: item.key, error })
        invalidItemsCount++
        continue
      }
    }

    // Second pass: delete duplicates
    const totalProcessed = eventMap.size + keysToDelete.length
    const actualKept = eventMap.size
    
    if (keysToDelete.length === 0) {
      // No duplicates found, but verify counts match
      if (totalProcessed + invalidItemsCount !== allItems.length) {
        logger.warn('Count mismatch while cleaning up replaceable events', {
          totalItems: allItems.length,
          processed: totalProcessed,
          invalid: invalidItemsCount
        })
      }
      return Promise.resolve({ deleted: 0, kept: actualKept })
    }

    return new Promise((resolve) => {
      const transaction = this.db!.transaction(storeName, 'readwrite')
      const store = transaction.objectStore(storeName)
      
      let deletedCount = 0
      let completedCount = 0

      keysToDelete.forEach(key => {
        const deleteRequest = store.delete(key)
        deleteRequest.onsuccess = () => {
          deletedCount++
          completedCount++
          if (completedCount === keysToDelete.length) {
            transaction.commit()
            const actualKept = eventMap.size
            const totalProcessed = actualKept + deletedCount
            if (totalProcessed + invalidItemsCount !== allItems.length) {
              logger.warn('Count mismatch after deletion', {
                totalItems: allItems.length,
                kept: actualKept,
                deleted: deletedCount,
                invalid: invalidItemsCount
              })
            }
            resolve({ deleted: deletedCount, kept: actualKept })
          }
        }
        deleteRequest.onerror = () => {
          completedCount++
          if (completedCount === keysToDelete.length) {
            transaction.commit()
            const actualKept = eventMap.size
            resolve({ deleted: deletedCount, kept: actualKept })
          }
        }
      })
    })
  }

  private getKindByStoreName(storeName: string): number | undefined {
    // Reverse lookup of getStoreNameByKind
    if (storeName === StoreNames.PROFILE_EVENTS) return kinds.Metadata
    if (storeName === StoreNames.RELAY_LIST_EVENTS) return kinds.RelayList
    if (storeName === StoreNames.FOLLOW_LIST_EVENTS) return kinds.Contacts
    if (storeName === StoreNames.MUTE_LIST_EVENTS) return kinds.Mutelist
    if (storeName === StoreNames.BOOKMARK_LIST_EVENTS) return kinds.BookmarkList
    if (storeName === StoreNames.PIN_LIST_EVENTS) return 10001
    if (storeName === StoreNames.INTEREST_LIST_EVENTS) return 10015
    if (storeName === StoreNames.BLOSSOM_SERVER_LIST_EVENTS) return ExtendedKind.BLOSSOM_SERVER_LIST
    if (storeName === StoreNames.RELAY_SETS) return kinds.Relaysets
    if (storeName === StoreNames.FAVORITE_RELAYS) return ExtendedKind.FAVORITE_RELAYS
    if (storeName === StoreNames.BLOCKED_RELAYS_EVENTS) return ExtendedKind.BLOCKED_RELAYS
      if (storeName === StoreNames.CACHE_RELAYS_EVENTS) return ExtendedKind.CACHE_RELAYS
      if (storeName === StoreNames.RSS_FEED_LIST_EVENTS) return ExtendedKind.RSS_FEED_LIST
      if (storeName === StoreNames.USER_EMOJI_LIST_EVENTS) return kinds.UserEmojiList
      if (storeName === StoreNames.EMOJI_SET_EVENTS) return kinds.Emojisets
      // PUBLICATION_EVENTS is not replaceable, so we don't handle it here
      return undefined
  }

  private isReplaceableEventKind(kind: number): boolean {
    // Check if this is a replaceable event kind
    return (
      kind === kinds.Metadata ||
      kind === kinds.Contacts ||
      kind === kinds.RelayList ||
      kind === kinds.Mutelist ||
      kind === kinds.BookmarkList ||
      (kind >= 10000 && kind < 20000) ||
      kind === ExtendedKind.FAVORITE_RELAYS ||
      kind === ExtendedKind.BLOCKED_RELAYS ||
      kind === ExtendedKind.CACHE_RELAYS ||
      kind === ExtendedKind.BLOSSOM_SERVER_LIST ||
      kind === ExtendedKind.RSS_FEED_LIST
    )
  }

  async forceDatabaseUpgrade(): Promise<void> {
    // Close the database first
    if (this.db) {
      this.db.close()
      this.db = null
      this.initPromise = null
    }
    
    // Check current version
    const checkRequest = window.indexedDB.open('jumble')
    let currentVersion = 14
    checkRequest.onsuccess = () => {
      const db = checkRequest.result
      currentVersion = db.version
      db.close()
    }
    checkRequest.onerror = () => {
      // If we can't check, start fresh
      currentVersion = 14
    }
    await new Promise(resolve => setTimeout(resolve, 100)) // Wait for version check
    
    const newVersion = currentVersion + 1
    
    // Open with new version to trigger upgrade
    return new Promise((resolve, reject) => {
      const request = window.indexedDB.open('jumble', newVersion)
      
      request.onerror = (event) => {
        reject(event)
      }
      
      request.onsuccess = () => {
        const db = request.result
        // Don't close - keep it open for the service to use
        this.db = db
        this.initPromise = Promise.resolve()
        resolve()
      }
      
      request.onupgradeneeded = (event) => {
        const db = (event.target as IDBOpenDBRequest).result
        // Create any missing stores
        Object.values(StoreNames).forEach(storeName => {
          if (!db.objectStoreNames.contains(storeName)) {
            db.createObjectStore(storeName, { keyPath: 'key' })
          }
        })
      }
    })
  }

  private async cleanUp() {
    await this.initPromise
    if (!this.db) {
      return
    }

    const stores = [
      { name: StoreNames.PROFILE_EVENTS, expirationTimestamp: Date.now() - 1000 * 60 * 60 * 24 }, // 1 day
      { name: StoreNames.RELAY_LIST_EVENTS, expirationTimestamp: Date.now() - 1000 * 60 * 60 * 24 }, // 1 day
      {
        name: StoreNames.FOLLOW_LIST_EVENTS,
        expirationTimestamp: Date.now() - 1000 * 60 * 60 * 24 // 1 day
      },
      {
        name: StoreNames.BLOSSOM_SERVER_LIST_EVENTS,
        expirationTimestamp: Date.now() - 1000 * 60 * 60 * 24 // 1 days
      },
      {
        name: StoreNames.RELAY_INFOS,
        expirationTimestamp: Date.now() - 1000 * 60 * 60 * 24 // 1 days
      }
    ]
    const transaction = this.db!.transaction(
      stores.map((store) => store.name),
      'readwrite'
    )
    await Promise.allSettled(
      stores.map(({ name, expirationTimestamp }) => {
        if (expirationTimestamp < 0) {
          return Promise.resolve()
        }
        return new Promise<void>((resolve, reject) => {
          const store = transaction.objectStore(name)
          const request = store.openCursor()
          request.onsuccess = (event) => {
            const cursor = (event.target as IDBRequest).result
            if (cursor) {
              const value: TValue = cursor.value
              if (value.addedAt < expirationTimestamp) {
                cursor.delete()
              }
              cursor.continue()
            } else {
              resolve()
            }
          }

          request.onerror = (event) => {
            reject(event)
          }
        })
      })
    )
  }

  /**
   * Store RSS feed items in IndexedDB
   */
  async putRssFeedItems(items: import('./rss-feed.service').RssFeedItem[]): Promise<void> {
    await this.initPromise
    const storeName = StoreNames.RSS_FEED_ITEMS
    
    if (!this.db || !this.db.objectStoreNames.contains(storeName)) {
      logger.warn('[IndexedDB] RSS feed items store not found', { storeName })
      return
    }

    return new Promise((resolve) => {
      const transaction = this.db!.transaction(storeName, 'readwrite')
      const store = transaction.objectStore(storeName)
      
      let completed = 0
      let errors = 0
      
      items.forEach((item) => {
        // Create a unique key from feedUrl and guid
        const key = `${item.feedUrl}:${item.guid}`
        // Store in TValue format for consistency with other stores
        const value: TValue<import('./rss-feed.service').RssFeedItem> = {
          key,
          value: item,
          addedAt: Date.now()
        }
        
        const request = store.put(value)
        request.onsuccess = () => {
          completed++
          if (completed + errors === items.length) {
            resolve()
          }
        }
        request.onerror = () => {
          errors++
          if (completed + errors === items.length) {
            resolve() // Don't reject, just log
          }
        }
      })
      
      if (items.length === 0) {
        resolve()
      }
    })
  }

  /**
   * Get all RSS feed items from IndexedDB
   */
  async getRssFeedItems(): Promise<import('./rss-feed.service').RssFeedItem[]> {
    await this.initPromise
    const storeName = StoreNames.RSS_FEED_ITEMS
    
    if (!this.db || !this.db.objectStoreNames.contains(storeName)) {
      logger.warn('[IndexedDB] RSS feed items store not found', { storeName })
      return []
    }

    return new Promise((resolve, reject) => {
      const transaction = this.db!.transaction(storeName, 'readonly')
      const store = transaction.objectStore(storeName)
      const request = store.getAll()
      
      request.onsuccess = () => {
        const items = request.result.map((entry: TValue<import('./rss-feed.service').RssFeedItem> | any) => {
          let item: import('./rss-feed.service').RssFeedItem | null = null
          
          // Handle new format (with value property)
          if (entry.value) {
            item = entry.value
          }
          // Fallback for old format (with item property)
          else if ((entry as any).item) {
            item = (entry as any).item as import('./rss-feed.service').RssFeedItem
          }
          
          if (!item) {
            return null
          }
          
          // Ensure pubDate is properly handled (IndexedDB may serialize Date as string)
          if (item.pubDate && typeof item.pubDate === 'string') {
            item.pubDate = new Date(item.pubDate)
          } else if (item.pubDate && typeof item.pubDate === 'number') {
            item.pubDate = new Date(item.pubDate)
          }
          
          return item
        }).filter((item): item is import('./rss-feed.service').RssFeedItem => item !== null)
        
        logger.debug('[IndexedDB] Retrieved RSS feed items', { 
          totalRetrieved: request.result.length,
          validItems: items.length 
        })
        resolve(items)
      }
      
      request.onerror = () => {
        reject(request.error)
      }
    })
  }

  /**
   * Clear RSS feed items from IndexedDB
   */
  async clearRssFeedItems(): Promise<void> {
    await this.initPromise
    const storeName = StoreNames.RSS_FEED_ITEMS
    
    if (!this.db || !this.db.objectStoreNames.contains(storeName)) {
      return
    }

    return new Promise((resolve, reject) => {
      const transaction = this.db!.transaction(storeName, 'readwrite')
      const store = transaction.objectStore(storeName)
      const request = store.clear()
      
      request.onsuccess = () => {
        resolve()
      }
      
      request.onerror = () => {
        reject(request.error)
      }
    })
  }
}

const instance = IndexedDbService.getInstance()
export default instance