import chai from 'chai'
import * as ganache from 'ganache'
import { initializeRelayer } from './preload'

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

// Local
import { ERC20, TornadoInstance } from 'types/deth'
import { Files, Onchain } from 'lib/data'
import { Chain, Contracts } from 'lib/chain'
import { ErrorUtils } from 'lib/utils'
import { TorProvider } from 'lib/web'
import { Core } from 'lib/core'

// Data
import compareDeposits from './resources/deposits_eth_0.1.json'
import { Setup } from 'lib/crypto'

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)

  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', () => {
      const core = new Core(mainnetProvider)

      let smallestEth: TornadoInstance
      let dai100K: 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)
        smallestEth = await core.getInstance('eth', 0.1)
        dai100K = await core.getInstance('dai', 100000)
        if (debug) core.on('debug', logListener)
      })
      after(async function () {
        this.timeout()
        if (debug) core.off('debug', logListener)
      })

      const smallEthDenomName = '1ETH0.1'

      it(`syncDeposits: Should be able to fetch deposit events for ${smallEthDenomName}`, async function () {
        // This is going to try syncing the entire range
        await core.syncDeposits(smallestEth, {
          blockDivisor: 50,
          concurrencyLimit: 20,
          msTimeout: 300
        })

        const cache = core.caches.get('Deposits' + smallEthDenomName)
        const rows = (await cache!.db.allDocs()).rows
        const valid = Object.values(compareDeposits)

        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)

      const bigDaiDenomName = '1DAI100000'

      it(`syncDeposits: Should be able to fetch deposit events for ${bigDaiDenomName}`, async function () {
        // This is going to try syncing the entire range
        await core.syncDeposits(dai100K, {
          blockDivisor: 50,
          concurrencyLimit: 20,
          msTimeout: 300
        })
      }).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.only('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.only('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]

        // Init properties via some relayer to make our life easier
        const relayer = await initializeRelayer(process.env.TEST_RELAYER_DOMAIN)

        let properties = relayer.properties

        // 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('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, 2, 3, 4]
        })

        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('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)
    })
  })
})