import { ChainId } from '@/types'
import { IndexDBStores } from '@/services/idb/@types'
import { getAllAccounts } from '@/services'

import { CHAINS, numbers, L1_CHAIN_ID } from '@/constants'
import { isEmpty, sleep, toChecksumAddress } from '@/utilities'
import { getBridgeHelper, getBridgeProxy, getAmbBridge } from '@/contracts'

import { EventsClass, GetAffirmationParams, GetRelayedMessageParams, SaveEventsParams } from './@types'
import { downloadEvents } from './load'

export * from './batch'

class EventAggregator implements EventsClass {
  public async getBackupedAddressFromPublicKey(publicKey: string) {
    try {
      const chainId = L1_CHAIN_ID
      let blockFrom = CHAINS[chainId].deployBlock

      const cachedAccountsByPublicKey = await window.$nuxt.$indexedDB.getAllFromIndex({
        indexName: 'key',
        storeName: `${IndexDBStores.ACCOUNT_EVENTS}_${chainId}`,
        key: publicKey,
      })

      // @ts-expect-error
      const [lastAccount] = cachedAccountsByPublicKey.sort((a, b) => a.blockNumber - b.blockNumber).slice(-numbers.ONE)

      if (lastAccount) {
        return lastAccount.owner
      }

      const cachedEvents = await window.$nuxt.$indexedDB.getAll({
        storeName: `${IndexDBStores.ACCOUNT_EVENTS}_${chainId}`,
      })

      const newEvents = []

      if (cachedEvents?.length) {
        const [latestEvent] = cachedEvents.slice(-numbers.ONE)
        blockFrom = Number(latestEvent.blockNumber) + numbers.ONE
      } else {
        const downloadedEvents = await downloadEvents(`accounts_${chainId}.json`, blockFrom)

        if (downloadedEvents.events.length) {
          newEvents.push(...downloadedEvents.events)
    
          blockFrom = downloadedEvents.lastBlock
        }
      }

      const { events: graphEvents, lastSyncBlock } = await getAllAccounts({ fromBlock: blockFrom, chainId })

      newEvents.push(...graphEvents)

      const [account] = newEvents.filter((e: { key: string }) => e.key === publicKey)

      if (account) {
        this.saveEvents({
          chainId,
          events: newEvents,
          storeName: IndexDBStores.ACCOUNT_EVENTS,
        })
        return account.owner
      }

      if (lastSyncBlock) {
        blockFrom = lastSyncBlock
      }

      const bridgeHelper = getBridgeHelper(chainId)

      const filter = bridgeHelper.filters.PublicKey()
      const rpcEvents = await bridgeHelper.queryFilter(filter, blockFrom)

      const accountEvents = rpcEvents.map((e: { args: { key: string; owner: string }; blockNumber: number }) => {
        return {
          key: e.args.key,
          owner: toChecksumAddress(e.args.owner),
          blockNumber: e.blockNumber,
        }
      })

      newEvents.push(...accountEvents)

      this.saveEvents({
        chainId,
        events: newEvents,
        storeName: IndexDBStores.ACCOUNT_EVENTS,
      })

      const events = newEvents.filter((e: { key: string }) => e.key === publicKey)

      if (isEmpty(events)) {
        return undefined
      }

      // @ts-expect-error
      const [event] = events.sort((a, b) => a.blockNumber - b.blockNumber).slice(-numbers.ONE)

      return event.owner
    } catch (err) {
      console.log(err)
      return undefined
    }
  }

  public async getAccountAddress(address: string) {
    try {
      const chainId = L1_CHAIN_ID
      let blockFrom = CHAINS[chainId].deployBlock

      const cachedAccountsByOwner = await window.$nuxt.$indexedDB.getAllFromIndex({
        indexName: 'owner',
        storeName: `${IndexDBStores.ACCOUNT_EVENTS}_${chainId}`,
        key: toChecksumAddress(address),
      })

      // @ts-expect-error
      const [lastAccount] = cachedAccountsByOwner.sort((a, b) => a.blockNumber - b.blockNumber).slice(-numbers.ONE)

      if (lastAccount) {
        return lastAccount.key
      }

      const cachedEvents = await window.$nuxt.$indexedDB.getAll({
        storeName: `${IndexDBStores.ACCOUNT_EVENTS}_${chainId}`,
      })

      const newEvents = []

      if (cachedEvents?.length) {
        const [latestEvent] = cachedEvents.slice(-numbers.ONE)
        blockFrom = Number(latestEvent.blockNumber) + numbers.ONE
      } else {
        const downloadedEvents = await downloadEvents(`accounts_${chainId}.json`, blockFrom)

        if (downloadedEvents.events.length) {
          newEvents.push(...downloadedEvents.events)
    
          blockFrom = downloadedEvents.lastBlock
        }
      }

      const { events: graphEvents, lastSyncBlock } = await getAllAccounts({ fromBlock: blockFrom, chainId })
      newEvents.push(...graphEvents)

      const [account] = newEvents.filter((e: { owner: string }) => toChecksumAddress(e.owner) === toChecksumAddress(address))

      if (account) {
        this.saveEvents({
          chainId,
          events: newEvents,
          storeName: IndexDBStores.ACCOUNT_EVENTS,
        })
        return account.key
      }

      if (lastSyncBlock) {
        blockFrom = lastSyncBlock
      }

      const bridgeHelper = getBridgeHelper(chainId)

      const filter = bridgeHelper.filters.PublicKey()
      const rpcEvents = await bridgeHelper.queryFilter(filter, blockFrom)

      const accountEvents = rpcEvents.map((e: { args: { key: string; owner: string }; blockNumber: number }) => {
        return {
          key: e.args.key,
          owner: toChecksumAddress(e.args.owner),
          blockNumber: e.blockNumber,
        }
      })

      newEvents.push(...accountEvents)

      this.saveEvents({
        chainId,
        events: newEvents,
        storeName: IndexDBStores.ACCOUNT_EVENTS,
      })

      const events = cachedEvents
        .concat(newEvents)
        .filter((e: { owner: string }) => toChecksumAddress(e.owner) === toChecksumAddress(address))

      if (isEmpty(events)) {
        return undefined
      }

      // @ts-expect-error
      const [event] = events.sort((a, b) => a.blockNumber - b.blockNumber).slice(-numbers.ONE)

      return event.key
    } catch (err) {
      console.log(err)
      return undefined
    }
  }

  // @ts-expect-error
  public async getRelayedMessage({ messageId, blockFrom = numbers.ZERO, attempt = numbers.ONE }: GetRelayedMessageParams) {
    try {
      const ambBridge = getBridgeProxy(L1_CHAIN_ID)
      const callRetryAttempt = 150

      if (!blockFrom) {
        // TODO save block number after start processing transaction
        blockFrom = await ambBridge.provider.getBlockNumber()
        blockFrom = blockFrom - Number('100')
      }

      const filter = ambBridge.filters.RelayedMessage(null, null, messageId)
      const events = await ambBridge.queryFilter(filter, blockFrom)

      if (!isEmpty(events)) {
        return events
      } else if (attempt >= callRetryAttempt) {
        return []
      } else {
        attempt++
        await sleep(numbers.SECOND * numbers.THREE)
        return this.getRelayedMessage({ messageId, blockFrom, attempt })
      }
    } catch (err) {
      attempt++
      await sleep(numbers.SECOND * numbers.TEN)
      return this.getRelayedMessage({ messageId, blockFrom, attempt })
    }
  }

  // @ts-expect-error
  public async getAffirmationCompleted({ messageId, blockFrom = numbers.ZERO, attempt = numbers.ONE }: GetAffirmationParams) {
    try {
      const ambBridge = getAmbBridge(ChainId.XDAI)
      const callRetryAttempt = 150

      if (!blockFrom) {
        // TODO save block number after start processing transaction
        blockFrom = await ambBridge.provider.getBlockNumber()
        blockFrom = blockFrom - Number('100')
      }

      const filter = ambBridge.filters.AffirmationCompleted(null, null, messageId)
      const events = await ambBridge.queryFilter(filter, blockFrom)

      if (!isEmpty(events)) {
        return events
      } else if (attempt >= callRetryAttempt) {
        return []
      } else {
        attempt++
        await sleep(numbers.SECOND * numbers.THREE)
        return this.getAffirmationCompleted({ messageId, attempt })
      }
    } catch (err) {
      attempt++
      await sleep(numbers.SECOND * numbers.TEN)
      return this.getAffirmationCompleted({ messageId, attempt })
    }
  }

  // @ts-expect-error
  public async getUserRequestForSignature({ blockFrom, messageId, attempt = numbers.ONE }: GetAffirmationParams) {
    try {
      const ambBridge = getAmbBridge(ChainId.XDAI)
      const callRetryAttempt = 150

      const filter = ambBridge.filters.UserRequestForSignature(messageId)
      const events = await ambBridge.queryFilter(filter, blockFrom)

      if (!isEmpty(events)) {
        return events
      } else if (attempt >= callRetryAttempt) {
        return []
      } else {
        attempt++
        await sleep(numbers.SECOND * numbers.THREE)
        return this.getUserRequestForSignature({ blockFrom, attempt })
      }
    } catch (err) {
      attempt++
      await sleep(numbers.SECOND * numbers.TEN)
      return this.getUserRequestForSignature({ blockFrom, attempt })
    }
  }

  // @ts-expect-error
  public async getUserRequestForAffirmation({ messageId, blockFrom, attempt = numbers.ONE }: GetAffirmationParams) {
    try {
      const bridge = getBridgeProxy(L1_CHAIN_ID)
      const callRetryAttempt = 150

      const filter = bridge.filters.UserRequestForAffirmation(messageId)
      const events = await bridge.queryFilter(filter, blockFrom)

      if (!isEmpty(events)) {
        return events
      } else if (attempt >= callRetryAttempt) {
        return []
      } else {
        attempt++
        await sleep(numbers.SECOND * numbers.THREE)
        return this.getUserRequestForAffirmation({ blockFrom, attempt })
      }
    } catch (err) {
      attempt++
      await sleep(numbers.SECOND * numbers.TEN)
      return this.getUserRequestForAffirmation({ blockFrom, attempt })
    }
  }

  saveEvents({ events, storeName, chainId }: SaveEventsParams) {
    try {
      if (window.$nuxt.$indexedDB.isBlocked || isEmpty(events)) {
        return
      }

      window.$nuxt.$indexedDB.createMultipleTransactions({
        data: events,
        storeName: `${storeName}_${chainId}`,
      })
    } catch (err) {
      console.error(`saveEvents has error: ${err.message}`)
    }
  }
}

const eventService = new EventAggregator()

export { eventService }