import chai from 'chai'
import * as ganache from 'ganache'

// External
import { solidity } from 'ethereum-waffle'
import { providers, BigNumber } from 'ethers'
import { parseUnits } from 'ethers/lib/utils'
// @ts-expect-error
import { parseIndexableString } from 'pouchdb-collate'

// Local
import { ERC20, TornadoInstance } from './deth'
import { Files, Onchain, RelayerProperties } from '@tornado/sdk-data'
import { Chain, Contracts } from '@tornado/sdk-chain'
import { ErrorUtils } from '@tornado/sdk-utils'
import { TorProvider } from '@tornado/sdk-web'
import { Core } from '@tornado/sdk-core'

// Data
import eth01DepositsReference from './resources/deposits_eth_0.1.json'
import eth1DepositsReference from './resources/deposits_eth_1.json'
import eth10DepositsReference from './resources/deposits_eth_10.json'
import eth100DepositsReference from './resources/deposits_eth_100.json'
import dai100KDepositsReference from './resources/deposits_dai_100000.json'

chai.use(solidity)

const expect = chai.expect

describe('Core', () => {
  const torify = process.env.TORIFY === 'true'
  const debug = process.env.DEBUG === 'true'

  if (!process.env.ETH_MAINNET_TEST_RPC) throw ErrorUtils.getError('need a mainnet rpc endpoint.')

  console.log('\nNote that these tests are time intensive. ⏳. ⏳.. ⏳...\n')
  console.log(
    'Also, we are using ganache because we just need a forked blockchain and not an entire environment. 🐧'
  )

  let daiAddress: string
  const daiWhale = '0x5777d92f208679db4b9778590fa3cab3ac9e2168' // Uniswap V3 Something/Dai Pool

  const mainnetProvider: providers.Provider = torify
    ? new TorProvider(process.env.ETH_MAINNET_TEST_RPC!, { port: +process.env.TOR_PORT! })
    : new providers.JsonRpcProvider(process.env.ETH_MAINNET_TEST_RPC)

  const _ganacheProvider = ganache.provider({
    chain: { chainId: 1 },
    // @ts-ignore
    fork: { url: process.env.ETH_MAINNET_TEST_RPC },
    logging: { quiet: true },
    wallet: {
      totalAccounts: 20,
      unlockedAccounts: [daiWhale]
    }
  })

  // @ts-expect-error
  const ganacheProvider = new providers.Web3Provider(_ganacheProvider)

  const chain = new Chain(ganacheProvider)

  it('Should print cache path to console', async () => {
    console.log(await Files.getCachePath('anything'))
  })

  after(async function () {
    this.timeout(0)
    await Files.wipeCache()
  })

  describe('namespace Contracts', () => {
    it('getClassicInstance: should be able to get a tornado instance', async () => {
      let instance = await Contracts.getInstance(String(1), 'eth', String(1), mainnetProvider)
      expect(instance.address).to.equal('0x47CE0C6eD5B0Ce3d3A51fdb1C52DC66a7c3c2936')
      await expect(instance.getLastRoot()).to.not.be.reverted
    }).timeout(0)
  })

  context('Unforked', () => {
    describe('class Classic', () => {
      if (!process.env.SYNC_TEST_INSTANCES)
        throw ErrorUtils.getError('SYNC_TEST_INSTANCES is required for sync tests.')

      const denominations = process.env.SYNC_TEST_INSTANCES.split(',')

      if (!denominations.length) throw ErrorUtils.getError('Instances entered were INVALID')

      const depositReferences: { [key: string]: typeof eth01DepositsReference } = {
        '1ETH0.1': eth01DepositsReference,
        '1ETH1': eth1DepositsReference,
        '1ETH10': eth10DepositsReference,
        '1ETH100': eth100DepositsReference,
        '1DAI100000': dai100KDepositsReference
      }

      const core = new Core(mainnetProvider)

      let instances: TornadoInstance[] = []

      let logListener = function (...args: any[]) {
        if (args.length === 3) {
          console.debug(`\nSync will be started with SB: ${args[0]}, TB: ${args[1]}, BD: ${args[2]}\n`)
        } else if (args.length == 2) {
          console.debug(`Syncing from block ${args[0]} to ${args[1]}`)
        }
      }

      before(async function () {
        this.timeout(0)

        const regexp = /([0-9]+)([A-Z]+)([0-9]+)/

        const promises = denominations.map((denom) => {
          const matches = denom.match(regexp)!.slice(2)
          return core.getInstance(matches[0].toLowerCase(), +matches[1])
        })

        ;(await Promise.all(promises)).forEach((instance) => instances.push(instance))

        if (debug) core.on('debug', logListener)
      })

      after(async function () {
        this.timeout()
        if (debug) core.off('debug', logListener)
      })

      it('Should sync all instances.', async function () {
        for (let i = 0; i < instances.length; i++) {
          console.log('\n ♻️ Syncing ' + denominations[i] + '\n')

          // This is going to try syncing the entire range
          await core.syncDeposits(instances[i], {
            blockDivisor: 50,
            concurrencyLimit: 20,
            msTimeout: 300
          })

          const cache = core.caches.get('Deposits' + denominations[i])
          const rows = (await cache!.db.allDocs()).rows
          const valid = Object.values(depositReferences[denominations[i]])

          expect(rows.length).to.be.gte(valid.length)

          for (let i = 0, len = valid.length; i < len; i++) {
            const id = rows[i].id
            const [bn, leafIndex, commitment] = parseIndexableString(id)
            const validDoc = valid[i]
            expect(bn).to.equal(validDoc['blockNumber'])
            expect(leafIndex).to.equal(validDoc['leafIndex'])
            expect(commitment).to.equal(validDoc['commitment'])
          }
        }
      }).timeout(0)
    })
  })

  describe('Forked (Ganache)', async () => {
    describe('class Classic', async () => {
      // Init sync objects
      const core = new Core(ganacheProvider)
      const needsMoney = ganacheProvider.getSigner()
      const daiWhaleSigner = ganacheProvider.getSigner(daiWhale)
      const debugListener = (message: string) => console.debug(message)

      let snapshotId: any
      let needsMoneyAddress: string
      let dai: ERC20
      let smallestEth: TornadoInstance
      let dai100K: TornadoInstance

      before(async function () {
        this.timeout(0)
        // Get snapshot just in case
        snapshotId = await ganacheProvider.send('evm_snapshot', [])

        // Prep whale eth balance
        await ganacheProvider.send('evm_setAccountBalance', [daiWhale, parseUnits('10').toHexString()])

        // Init async objects
        needsMoneyAddress = await needsMoney.getAddress()
        daiAddress = await Onchain.getTokenAddress('1', 'dai')
        dai = chain.getTokenContract(daiAddress).connect(daiWhaleSigner)
        smallestEth = await core.getInstance('eth', 0.1)
        dai100K = await core.getInstance('dai', 100000)

        // Set debug
        if (debug) core.on('debug', debugListener)
      })
      after(async function () {
        this.timeout(0)
        await ganacheProvider.send('evm_revert', [snapshotId])
        core.off('debug', debugListener)
      })
      afterEach(() => {
        dai = dai.connect(daiWhaleSigner)
      })

      it('buildDepositTransaction: build a single eth deposit tx and succeed', async () => {
        const initBal = await needsMoney.getBalance()

        // Build tx and load cache for this test
        const tx = await core.buildDepositTransaction(smallestEth)
        const cache = core.loadDepositCache('Deposits1ETH0.1')

        // Prep promise to only try withdrawing after cache has been updated
        const putPromise = new Promise((resolve) => {
          smallestEth.on(
            smallestEth.filters.Deposit(null, null, null),
            function (commitment, leafIndex, timestamp, event) {
              resolve(cache.db.put(cache.buildDoc(event)))
            }
          )
        })

        const listener = smallestEth.listeners(smallestEth.filters.Deposit(null, null, null))[0]

        // Deposit and await cache updated
        const response = await needsMoney.sendTransaction(tx.request)
        await response.wait()
        const endBal = await needsMoney.getBalance()

        // Passing resolve as callback into put didn't work
        await await putPromise

        // Turn off listener (NEEDED OR WE'RE NOT RESOLVING)
        smallestEth.off(smallestEth.filters.Deposit(null, null, null), listener)

        // Check deposit predicates
        expect(initBal).to.equal(parseUnits('1000'))
        expect(endBal).to.be.lte(parseUnits('999.9'))
      }).timeout(0)

      it('buildDepositProof: it should be able to build an eth proof', async () => {
        // Get withdrawer, load cache, prep note for this test
        const withdrawer = ganacheProvider.getSigner(2)
        const cache = core.loadDepositCache('Deposits1ETH0.1')
        // We need this to clean the cache, we want to have clean state
        const doc = (await cache.db.allDocs({ include_docs: true, descending: true, limit: 1 })).rows[0].doc
        // We are not transforming because we want to test this out
        const notes = await core.loadNotes()

        // Build proof
        let proof: any

        try {
          proof = await core.buildDepositProof(
            smallestEth,
            {
              address: await withdrawer.getAddress()
            },
            await needsMoney.getAddress(),
            notes[0],
            {
              // On by default but stating for visibility
              checkNotesSpent: true,
              checkKnownRoot: true
            }
          )
        } finally {
          await cache.db.remove(doc?._id!, doc?._rev!)
        }

        // Substract the calculated fee from the received amount
        const ethDelta = parseUnits('0.1').sub(proof[5])

        // Withdrawal time, let's see if it works
        // The balance diff will be exact because withdrawer is paying for gas as relayer
        await expect(() =>
          smallestEth
            .connect(withdrawer)
            .withdraw(proof[0], proof[1], proof[2], proof[3], proof[4], proof[5], proof[6])
        ).to.changeEtherBalance(needsMoney, ethDelta)
      }).timeout(0)

      it('buildDepositTransaction: build a single token deposit tx and succeed', async () => {
        // Prep deposit amount, proxy for approval, cache, bal for comp
        const depositAmount = parseUnits('100000')
        const proxy = await core.getProxy()
        const cache = core.loadDepositCache('Deposits1DAI100000')
        const daiBalBef = await dai.balanceOf(dai100K.address)

        // Prep promise to only try withdrawing after cache has been updated
        const putPromise = new Promise((resolve) => {
          dai100K.on(
            dai100K.filters.Deposit(null, null, null),
            function (commitment, leafIndex, timestamp, event) {
              resolve(cache.db.put(cache.buildDoc(event)))
            }
          )
        })

        const listener = dai100K.listeners()[0]

        // Prep for deposit
        await dai.transfer(needsMoneyAddress, depositAmount)
        dai = dai.connect(needsMoney)
        const tx = await core.buildDepositTransaction(dai100K)
        // Approve dai for the proxy first (transferFrom)
        await dai.approve(proxy.address, depositAmount)

        // Deposit
        const response = await needsMoney.sendTransaction(tx.request)
        await response.wait()

        // Prep for check
        const daiBalPost = await dai.balanceOf(dai100K.address)

        // Passing resolve as callback into put didn't work
        await await putPromise

        // Off (otherwise no resolve)
        dai100K.off(dai100K.filters.Deposit(null, null, null), listener)

        // Checks
        expect(daiBalBef).to.equal(daiBalPost.sub(depositAmount))
        expect(await dai.balanceOf(needsMoneyAddress)).to.equal(0)
      }).timeout(0)

      it('buildDepositProof: it should be able to build a token proof', async () => {
        if (!process.env.TEST_RELAYER_DOMAIN) throw ErrorUtils.getError('core.test.ts: Need a relayer name')

        // Get withdrawer, load cache, prep note for this test
        const withdrawer = ganacheProvider.getSigner(2)
        const cache = core.loadDepositCache('Deposits1DAI100000')

        // We need this to clean the cache, we want to have clean state
        const doc = (await cache.db.allDocs({ include_docs: true, descending: true, limit: 1 })).rows[0].doc
        // We are not transforming because we want to test this out
        const notes = await core.loadNotes()
        // We need to select last
        const note = notes[notes.length - 1]

        let properties: RelayerProperties = {
          address: await withdrawer.getAddress(),
          version: '2',
          serviceFeePercent: 0.04,
          miningFeePercent: 0.15,
          status: 'whatever',
          chainId: 1,
          prices: new Map<string, BigNumber>()
        }

        properties.prices.set('dai', BigNumber.from(10).pow(18).div(1800))

        // Just set another address
        properties.address = await withdrawer.getAddress()

        // Build proof with relayer properties this time
        let proof

        try {
          proof = await core.buildDepositProof(dai100K, properties, await needsMoney.getAddress(), note, {
            // On by default but stating for visibility
            checkNotesSpent: true,
            checkKnownRoot: true
          })
        } finally {
          await cache.db.remove(doc?._id!, doc?._rev!)
        }

        // Calc balance diff again... it will be expressed in dai
        const daiDelta = parseUnits('100000').sub(proof[5])

        await expect(
          await dai100K
            .connect(withdrawer)
            .withdraw(proof[0], proof[1], proof[2], proof[3], proof[4], proof[5], proof[6])
        ).to.changeTokenBalance(dai, needsMoney, daiDelta)
      }).timeout(0)

      it.only('buildDepositTransactions: multiple eth deposits', async () => {
        const instances = await core.getInstances(
          [0.1, 1, 10, 100].map((el) => {
            return { token: 'eth', denomination: el }
          })
        )

        const txs = await core.buildDepositTransactions(instances, {
          depositsPerInstance: [1, 1, 2, 1]
        })

        for (let i = 0, len = txs.length; i < len; i++) {
          console.log('SENDING => ', i)
          const response = await needsMoney.sendTransaction(txs[i].request)
          console.log('TX SENT => ', i)
          await response.wait()
          console.log('WAITING => ', i)
        }

        expect(await needsMoney.getBalance()).to.be.lte(parseUnits('888.8'))
      }).timeout(0)

      it('buildDepositTransactions: multiple token deposits', async () => {
        const instances = await core.getInstances(
          [100, 1000, 10000, 100000].map((el) => {
            return { token: 'dai', denomination: el }
          })
        )

        const proxy = await core.getProxy()
        const depositAmount = parseUnits('432100')

        await dai.transfer(needsMoneyAddress, parseUnits('432100'))
        dai = dai.connect(needsMoney)

        const txs = await core.buildDepositTransactions(instances, {
          depositsPerInstance: [1, 2, 3, 4]
        })

        await dai.approve(proxy.address, depositAmount)

        for (let i = 0, len = txs.length; i < len; i++) {
          await expect(() => needsMoney.sendTransaction(txs[i].request)).to.not.be.reverted
        }

        expect(await dai.balanceOf(needsMoneyAddress)).to.equal(0)
      }).timeout(0)

      it('createInvoice: should be able to create an invoice', async () => {
        const instance = await core.getInstance('dai', '1000')
        const invoice = await core.createInvoice(instance)
        console.log(invoice)
      }).timeout(0)
    })
  })
})