const { ethers } = require('ethers');
const { Token, CurrencyAmount, Percent, TradeType } = require('@uniswap/sdk-core');
const { Pool, Route, Trade, SwapRouter } = require('@uniswap/v3-sdk');
const IUniswapV3PoolABI = require('@uniswap/v3-core/artifacts/contracts/interfaces/IUniswapV3Pool.sol/IUniswapV3Pool.json').abi;
const Quoter = require('@uniswap/v3-periphery/artifacts/contracts/lens/Quoter.sol/Quoter.json').abi;
const IERC20 = require('@uniswap/v2-periphery/build/IERC20.json');

const SWAP_ROUTER_ADDRESS = '0xe592427a0aece92de3edee1f18e0157c05861564';
const WALLET_ADDRESS = `0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266`;
const WALLET_SECRET = `0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80`;
const INFURA_TEST_URL = `https://mainnet.infura.io/v3/<TRUFFLEHOG_REDACTED_INFURA>`;
const POOL_FACTORY_CONTRACT_ADDRESS = '0x1F98431c8aD98523631AE4a59f267346ea31F984';
const QUOTER_CONTRACT_ADDRESS = '0xb27308f9F90D607463bb33eA1BeBb41C27CE5AB6';

const provider = new ethers.providers.JsonRpcProvider(INFURA_TEST_URL);
const chainId = 1;

const token0 = new Token(chainId, '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2', 18, 'WETH', 'Wrapped Ether');
const token1 = new Token(chainId, '0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984', 18, 'UNI', 'Uniswap Token');

const fee = 3000; // Change the fee tier as required (500 for low, 3000 for medium, and 10000 for high)

async function main() {
  try {
    const poolInfo = await getPoolInfo();

    const pool = new Pool(token0, token1, fee, poolInfo.sqrtPriceX96.toString(), poolInfo.liquidity.toString(), poolInfo.tick);

    const swapRoute = new Route([pool], token0, token1);
    const amountIn = fromReadableAmount('0.001', 18);
    const quotedAmountOut = await getOutputQuote(amountIn);

    const uncheckedTrade = Trade.createUncheckedTrade({
      route: swapRoute,
      inputAmount: CurrencyAmount.fromRawAmount(token0, amountIn),
      outputAmount: CurrencyAmount.fromRawAmount(token1, quotedAmountOut.toString()),
      tradeType: TradeType.EXACT_INPUT,
    });

    await getTokenTransferApproval(token0.address);

    const options = {
      slippageTolerance: new Percent(50, 10_000), // 50 bips, or 0.50%
      deadline: Math.floor(Date.now() / 1000) + 60 * 20, // 20 minutes from the current Unix time
    };

    const methodParameters = SwapRouter.swapCallParameters(uncheckedTrade, options);

    const gasEstimate = await provider.estimateGas({
      to: methodParameters.address,
      data: methodParameters.calldata,
      value: methodParameters.value,
    });

    const wallet = new ethers.Wallet(WALLET_SECRET, provider);

    const tx = {
      data: methodParameters.calldata,
      to: methodParameters.address,
      value: methodParameters.value,
      gasLimit: gasEstimate,
      gasPrice: await provider.getGasPrice(),
    };

    const res = await sendTransaction(tx, wallet);
    console.log(res);
  } catch (e) {
    console.log(e);
  }
}

main();

async function getPoolInfo() {
  try {
    // Fixed from here
    const currentPoolAddress = Pool.getAddress(token0, token1, fee);

    const poolContract = new ethers.Contract(currentPoolAddress, IUniswapV3PoolABI, provider);

    const [token0, token1, fee, tickSpacing, liquidity, slot0] = await Promise.all([
      poolContract.token0(),
      poolContract.token1(),
      poolContract.fee(),
      poolContract.tickSpacing(),
      poolContract.liquidity(),
      poolContract.slot0(),
    ]);

    return {
      token0,
      token1,
      fee,
      tickSpacing,
      liquidity,
      sqrtPriceX96: slot0[0],
      tick: slot0[1],
    };
  } catch (e) {
    console.log(e);
  }
}

async function getOutputQuote(amountIn) {
  try {
    const quoterContract = new ethers.Contract(QUOTER_CONTRACT_ADDRESS, Quoter, provider);

    const quotedAmountOut = await quoterContract.callStatic.quoteExactInputSingle(token0, token1, fee, amountIn, 0);
    return quotedAmountOut;
  } catch (e) {
    console.log(e);
  }
}

function fromReadableAmount(amount, decimals) {
  try {
    const value = ethers.utils.parseUnits(amount, decimals);
    return value.toString();
  } catch (e) {
    console.log(e);
  }
}

async function getTokenTransferApproval(tokenAddress) {
  try {
    const wallet = new ethers.Wallet(WALLET_SECRET, provider);
    const tokenContract = new ethers.Contract(tokenAddress, IERC20.abi, wallet);

    const spender = SWAP_ROUTER_ADDRESS;
    const approvalAmount = ethers.constants.MaxUint256;
    const connectedTokenContract = tokenContract.connect(wallet);
    // Approve the spender (swap router) to spend the tokens on behalf of the user
    const approvalTx = await connectedTokenContract.approve(spender, approvalAmount);

    // Wait for the approval transaction to be mined
    const approvalReceipt = await approvalTx.wait();
    // Check if the approval transaction was successful
    if (approvalReceipt.status !== 1) {
      throw new Error('Token transfer approval failed');
    }

    // Return the approval transaction hash or any other relevant information
    return approvalReceipt.transactionHash;
  } catch (e) {
    console.log(e);
  }
}

async function sendTransaction(tx, wallet) {
  try {
    // Sign the transaction with the wallet's private key
    const signedTx = await wallet.signTransaction(tx);

    // Send the signed transaction
    const txResponse = await provider.sendTransaction(signedTx);

    // Wait for the transaction to be mined
    const txReceipt = await txResponse.wait();

    // Check if the transaction was successful
    if (txReceipt.status !== 1) {
      throw new Error('Transaction failed');
    }

    // Return the transaction hash or any other relevant information
    return txReceipt.transactionHash;
  } catch (e) {
    console.log(e);
  }
}
this error PS C:\Users\lidor\Desktop\Trade Bot> node .
ReferenceError: Cannot access 'token0' before initialization
    at getPoolInfo (C:\Users\lidor\Desktop\Trade Bot\index.js:77:48)      
    at main (C:\Users\lidor\Desktop\Trade Bot\index.js:25:28)
    at Object.<anonymous> (C:\Users\lidor\Desktop\Trade Bot\index.js:72:1)
    at Module._compile (node:internal/modules/cjs/loader:1254:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1308:10)  
    at Module.load (node:internal/modules/cjs/loader:1117:32)
    at Module._load (node:internal/modules/cjs/loader:958:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
    at node:internal/main/run_main_module:23:47
TypeError: Cannot read properties of undefined (reading 'sqrtPriceX96')
    at main (C:\Users\lidor\Desktop\Trade Bot\index.js:27:57)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
PS C:\Users\lidor\Desktop\Trade Bot>