// File: @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol





pragma solidity >=0.6.2;

interface IUniswapV2Router01 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);
    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountToken, uint amountETH);
    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);

    function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}

// File: @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol



pragma solidity >=0.6.2;


interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);
    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountETH);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol


// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}

// File: Trader.sol



pragma solidity ^0.8.0;



contract BuyAndSell {
    IUniswapV2Router02 public uniswapV2Router;
    IERC20 public token;
    address public owner;

    modifier onlyOwner() {
        require(msg.sender == owner, "Caller is not the owner.");
        _;
    }

    constructor(address _router, address _token) {
        uniswapV2Router = IUniswapV2Router02(_router);
        token = IERC20(_token);
        owner = msg.sender;
    }

    function buyAndSell(uint deadline) external payable onlyOwner {
        require(msg.value > 0, "Must send ETH to execute the trade.");
        
        address[] memory path = new address[](2);
        path[0] = uniswapV2Router.WETH();
        path[1] = address(token);

        uint[] memory amountsIn = uniswapV2Router.getAmountsIn(msg.value, path);
        uint tokenAmountOut = amountsIn[1];

        // Check slippage for buy trade
        uint maxTokenAmountOut = (tokenAmountOut * 1001) / 1000;
        
        // Buy the token with ETH sent to the contract
        uniswapV2Router.swapExactETHForTokens{value: msg.value}(tokenAmountOut, path, address(this), deadline);

        // Approve the Uniswap router to spend the purchased tokens
        uint tokenBalance = token.balanceOf(address(this));
        token.approve(address(uniswapV2Router), tokenBalance);

        // Check slippage for sell trade
        uint[] memory amountsOut = uniswapV2Router.getAmountsOut(tokenBalance, path);
        uint ethAmountOut = amountsOut[1];
        uint minEthAmountOut = (ethAmountOut * 1000) / 1001;

        // Sell the token back to ETH
        uniswapV2Router.swapExactTokensForETH(tokenBalance, minEthAmountOut, path, msg.sender, deadline);
    }

    function executeMultipleTrades(uint numTrades, uint deadline) external payable onlyOwner {
        require(numTrades > 0, "Number of trades must be greater than 0.");

        uint ethPerTrade = msg.value / numTrades;
        require(ethPerTrade > 0, "Not enough ETH for the specified number of trades.");

        for (uint i = 0; i < numTrades; i++) {
            this.buyAndSell{value: ethPerTrade}(deadline);
        }
    }

    function buyAndSellTokenAmount(uint tokenAmount, uint deadline) external payable onlyOwner {
        require(msg.value > 0, "Must send ETH to execute the trade.");
        require(tokenAmount > 0, "Token amount must be greater than 0.");

        address[] memory path = new address[](2);
        path[0] = uniswapV2Router.WETH();
        path[1] = address(token);

        uint[] memory amountsIn = uniswapV2Router.getAmountsIn(msg.value, path);
        uint ethAmountRequired = amountsIn[0];

        require(msg.value >= ethAmountRequired, "Not enough ETH to buy the specified token amount.");

                // Check slippage for buy trade
        uint maxTokenAmountOut = (tokenAmount * 1001) / 1000;

        // Buy the token with ETH sent to the contract
        uniswapV2Router.swapExactETHForTokens{value: msg.value}(tokenAmount, path, address(this), deadline);

        // Approve the Uniswap router to spend the purchased tokens
        uint tokenBalance = token.balanceOf(address(this));
        token.approve(address(uniswapV2Router), tokenBalance);

        // Check slippage for sell trade
        uint[] memory amountsOut = uniswapV2Router.getAmountsOut(tokenBalance, path);
        uint ethAmountOut = amountsOut[1];
        uint minEthAmountOut = (ethAmountOut * 1000) / 1001;

        // Sell the token back to ETH
        uniswapV2Router.swapExactTokensForETH(tokenBalance, minEthAmountOut, path, msg.sender, deadline);
    }

    function withdrawETH() external onlyOwner {
        uint balance = address(this).balance;
        require(balance > 0, "No ETH balance to withdraw.");
        (bool success, ) = msg.sender.call{value: balance}("");
        require(success, "ETH withdrawal failed.");
    }
}