// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IDEX {
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
}

contract ArbitrageBot {
    address public owner;

    modifier onlyOwner() {
        require(msg.sender == owner, "Not the owner");
        _;
    }

    constructor() {
        owner = msg.sender;
    }

    function executeArbitrage(
        address dex1,
        address dex2,
        address tokenA,
        address tokenB,
        uint amountIn
    ) external onlyOwner {
        // Get reserves from DEX 1
        (uint112 reserveA1, uint112 reserveB1,) = IDEX(dex1).getReserves();
        // Get reserves from DEX 2
        (uint112 reserveA2, uint112 reserveB2,) = IDEX(dex2).getReserves();

        // Calculate prices on both DEXs
        uint price1 = reserveB1 * 1e18 / reserveA1;
        uint price2 = reserveB2 * 1e18 / reserveA2;

        // Determine profitable arbitrage direction
        if (price1 > price2) {
            // Buy on DEX 2, sell on DEX 1
            performSwap(dex2, tokenA, tokenB, amountIn);
            performSwap(dex1, tokenB, tokenA, amountIn * price1 / 1e18);
        } else if (price2 > price1) {
            // Buy on DEX 1, sell on DEX 2
            performSwap(dex1, tokenA, tokenB, amountIn);
            performSwap(dex2, tokenB, tokenA, amountIn * price2 / 1e18);
        }
    }

    function performSwap(
        address dex,
        address tokenIn,
        address tokenOut,
        uint amountIn
    ) internal {
        IERC20(tokenIn).approve(dex, amountIn);
        IDEX(dex).swap(
            tokenIn == tokenOut ? amountIn : 0,
            tokenIn == tokenOut ? 0 : amountIn,
            address(this),
            new bytes(0)
        );
    }

    function withdraw(address token, uint amount) external onlyOwner {
        IERC20(token).transfer(owner, amount);
    }
}