import { BigNumber, BigNumberish, providers } from 'ethers'
import { call } from 'typed-redux-saga'
import ERC1155_ABI from 'uniswap/src/abis/erc1155.json'
import ERC20_ABI from 'uniswap/src/abis/erc20.json'
import ERC721_ABI from 'uniswap/src/abis/erc721.json'
import { Erc1155, Erc20, Erc721 } from 'uniswap/src/abis/types'
import { AssetType } from 'uniswap/src/entities/assets'
import { WalletEventName } from 'uniswap/src/features/telemetry/constants'
import { sendAnalyticsEvent } from 'uniswap/src/features/telemetry/send'
import { isNativeCurrencyAddress } from 'uniswap/src/utils/currencyId'
import { logger } from 'utilities/src/logger/logger'
import { sendTransaction } from 'wallet/src/features/transactions/sendTransactionSaga'
import { TransferTokenParams } from 'wallet/src/features/transactions/transfer/types'
import { SendTokenTransactionInfo, TransactionType } from 'wallet/src/features/transactions/types'
import { getContractManager, getProvider } from 'wallet/src/features/wallet/context'
import { createMonitoredSaga } from 'wallet/src/utils/saga'

type Params = {
  transferTokenParams: TransferTokenParams
  txRequest: providers.TransactionRequest
}

export function* transferToken(params: Params) {
  try {
    const { transferTokenParams, txRequest } = params
    const { txId, account, chainId } = transferTokenParams
    const typeInfo = getTransferTypeInfo(transferTokenParams)
    yield* call(validateTransfer, transferTokenParams)
    yield* call(sendTransaction, {
      txId,
      chainId,
      account,
      options: { request: txRequest },
      typeInfo,
    })

    const amountUSD = params.transferTokenParams.currencyAmountUSD
      ? parseFloat(params.transferTokenParams.currencyAmountUSD.toFixed(2))
      : undefined

    sendAnalyticsEvent(WalletEventName.TransferSubmitted, {
      chainId: params.transferTokenParams.chainId,
      tokenAddress: params.transferTokenParams.tokenAddress,
      toAddress: params.transferTokenParams.toAddress,
      amountUSD,
    })
    logger.debug('transferTokenSaga', 'transferToken', 'Transfer submitted')
  } catch (error) {
    yield* call(logger.error, error, {
      tags: { file: 'transferTokenSaga', function: 'transferToken' },
    })
  }
}

function validateTransferAmount(amountInWei: string, currentBalance: BigNumberish): void {
  const amount = BigNumber.from(amountInWei)
  if (amount.lte(0)) {
    throw new Error('Invalid transfer amount')
  }
  if (BigNumber.from(amountInWei).gt(currentBalance)) {
    throw new Error('Balance insufficient for transfer')
  }
}

function* validateTransfer(transferTokenParams: TransferTokenParams) {
  const { type, chainId, tokenAddress, account } = transferTokenParams
  const contractManager = yield* call(getContractManager)
  const provider = yield* call(getProvider, chainId)

  switch (type) {
    case AssetType.ERC1155: {
      const erc1155Contract = contractManager.getOrCreateContract<Erc1155>(chainId, tokenAddress, provider, ERC1155_ABI)

      const balance = yield* call(erc1155Contract.balanceOf, account.address, transferTokenParams.tokenId)

      validateTransferAmount('1', balance)
      return
    }
    case AssetType.ERC721: {
      const erc721Contract = contractManager.getOrCreateContract<Erc721>(chainId, tokenAddress, provider, ERC721_ABI)
      const balance = yield* call(erc721Contract.balanceOf, account.address)
      validateTransferAmount('1', balance)
      return
    }
    case AssetType.Currency: {
      if (isNativeCurrencyAddress(chainId, tokenAddress)) {
        const balance = yield* call([provider, provider.getBalance], account.address)
        validateTransferAmount(transferTokenParams.amountInWei, balance)
        return
      }

      const tokenContract = contractManager.getOrCreateContract<Erc20>(chainId, tokenAddress, provider, ERC20_ABI)
      const currentBalance = yield* call(tokenContract.balanceOf, account.address)
      validateTransferAmount(transferTokenParams.amountInWei, currentBalance)
    }
  }
}

function getTransferTypeInfo(params: TransferTokenParams): SendTokenTransactionInfo {
  const { type: assetType, toAddress, tokenAddress, currencyAmountUSD } = params
  const typeInfo: SendTokenTransactionInfo = {
    assetType,
    recipient: toAddress,
    tokenAddress,
    type: TransactionType.Send,
    currencyAmountUSD,
  }

  if (assetType === AssetType.ERC721 || assetType === AssetType.ERC1155) {
    typeInfo.tokenId = params.tokenId
  } else if (assetType === AssetType.Currency) {
    typeInfo.currencyAmountRaw = params.amountInWei
  }

  return typeInfo
}

export const {
  name: transferTokenSagaName,
  wrappedSaga: transferTokenSaga,
  reducer: transferTokenReducer,
  actions: transferTokenActions,
} = createMonitoredSaga<Params>(transferToken, 'transferToken')
