/*

\/ Dreams shape the world, dreams create the world anew. \/

\/ Website: https://nomadsvision.co/ \/
\/ Twitter: https://twitter.com/NomadVisionETH \/
\/ Medium: https://medium.com/@nomadsvision \/
\/ Telegram: https://t.me/NOMADPortal \/

*/

// SPDX-License-Identifier: NOLICENSE


pragma solidity ^0.8.6;

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);
}

library Address{
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
}



abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor() {
        _setOwner(_msgSender());
    }

    function owner() public view virtual returns (address) {
        return _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);
    }
}

interface IFactory{
        function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IRouter {
    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 NOMAD is Context, IERC20, Ownable {
    using Address for address payable;

    mapping (address => uint256) private _rOwned;
    mapping (address => uint256) private _tOwned;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) private _isExcludedFromFee;
    mapping (address => bool) private _isExcluded;
    mapping (address => bool) private _isBot;
    mapping (address => bool)  _allowedTransfer;

    address[] private _excluded;

    bool public swapEnabled;
    bool private swapping;
    bool public tradingEnabled;

    IRouter public router;
    address public pair;

    uint8 private constant _decimals = 9;
    uint256 private constant MAX = ~uint256(0);

    uint256 private _tTotal = 100_000_000 * 10**_decimals;
    uint256 private _rTotal = (MAX - (MAX % _tTotal));

    uint256 public swapTokensAtAmount = 50000 * 10**_decimals;
    uint256 public maxWalletBalance = 40_000_000 * 10**_decimals;

    string private constant _name = "Nomad's Vision";
    string private constant _symbol = "NOMAD";
    
    address public marketingWallet = 0x88b8F72BE0deE2DE8412AD23D4FC6e214ecE4B8F;

    struct Taxes {
      uint256 rfi;
      uint256 marketing;
      uint256 liquidity;
    }

    Taxes public buyTaxes = Taxes(0,3,0);
    Taxes public sellTaxes = Taxes(0,3,0); 

    struct TotFeesPaidStruct{
        uint256 rfi;
        uint256 marketing;
        uint256 liquidity;
    }
    TotFeesPaidStruct public totFeesPaid;

    struct valuesFromGetValues{
      uint256 rAmount;
      uint256 rTransferAmount;
      uint256 rRfi;
      uint256 rMarketing;
      uint256 rLiquidity;
      uint256 tTransferAmount;
      uint256 tRfi;
      uint256 tMarketing;
      uint256 tLiquidity;
    }

    event FeesChanged();
    event UpdatedRouter(address oldRouter, address newRouter);
    
    modifier antiSniper(address account){
        require(tradingEnabled || _allowedTransfer[account], "Trading not enabled yet");
        _;
    }


    modifier lockTheSwap {
        swapping = true;
        _;
        swapping = false;
    }

    constructor (address routerAddress) {
        IRouter _router = IRouter(routerAddress);
        address _pair = IFactory(_router.factory())
            .createPair(address(this), _router.WETH());

        router = _router;
        pair = _pair;

        excludeFromReward(pair);
        
        _rOwned[owner()] = _rTotal;
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[marketingWallet] = true;
        
        _allowedTransfer[owner()] = true;
        _allowedTransfer[marketingWallet] = true;
        _allowedTransfer[address(this)] = true;

        emit Transfer(address(0), owner(), _tTotal);
    }

    function name() public pure returns (string memory) {
        return _name;
    }
    function symbol() public pure returns (string memory) {
        return _symbol;
    }
    function decimals() public pure returns (uint8) {
        return _decimals;
    }

    function totalSupply() public view override returns (uint256) {
        return _tTotal;
    }

    function balanceOf(address account) public view override returns (uint256) {
        if (_isExcluded[account]) return _tOwned[account];
        return tokenFromReflection(_rOwned[account]);
    }

    function transfer(address recipient, uint256 amount) public override antiSniper(msg.sender) returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) public override antiSniper(msg.sender) returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) public virtual override antiSniper(sender) returns (bool) {
        _transfer(sender, recipient, amount);
        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        _approve(sender, _msgSender(), currentAllowance - amount);
        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue) public virtual antiSniper(msg.sender) returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender]+addedValue);
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual antiSniper(msg.sender) returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        return true;
    }

    function isExcludedFromReward(address account) public view returns (bool) {
        return _isExcluded[account];
    }

    function reflectionFromToken(uint256 tAmount, bool deductTransferRfi) public view returns(uint256) {
        require(tAmount <= _tTotal, "Amount must be less than supply");
        if (!deductTransferRfi) {
            valuesFromGetValues memory s = _getValues(tAmount, true, buyTaxes);
            return s.rAmount;
        } else {
            valuesFromGetValues memory s = _getValues(tAmount, true, buyTaxes);
            return s.rTransferAmount;
        }
    }

    function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
        require(rAmount <= _rTotal, "Amount must be less than total reflections");
        uint256 currentRate =  _getRate();
        return rAmount/currentRate;
    }

    function excludeFromReward(address account) internal {
        require(!_isExcluded[account], "Account is already excluded");
        if(_rOwned[account] > 0) {
            _tOwned[account] = tokenFromReflection(_rOwned[account]);
        }
        _isExcluded[account] = true;
        _excluded.push(account);
    }

    function includeInReward(address account) internal {
        require(_isExcluded[account], "Account is not excluded");
        for (uint256 i = 0; i < _excluded.length; i++) {
            if (_excluded[i] == account) {
                _excluded[i] = _excluded[_excluded.length - 1];
                _tOwned[account] = 0;
                _isExcluded[account] = false;
                _excluded.pop();
                break;
            }
        }
    }

    function excludeFromFee(address account) public onlyOwner {
        _isExcludedFromFee[account] = true;
    }

    function includeInFee(address account) public onlyOwner {
        _isExcludedFromFee[account] = false;
    }
    
    function setAllowedTransfer(address account, bool value) external onlyOwner{
        _allowedTransfer[account] = value;
    }
    
    function setTradingEnabled(bool _enabled) external onlyOwner{
        tradingEnabled = _enabled;
    }

    function isExcludedFromFee(address account) public view returns(bool) {
        return _isExcludedFromFee[account];
    }

    function _reflectRfi(uint256 rRfi, uint256 tRfi) private {
        _rTotal -=rRfi;
        totFeesPaid.rfi +=tRfi;
    }


    function _takeMarketing(uint256 rMarketing, uint256 tMarketing) private {
        totFeesPaid.marketing +=tMarketing;

        if(_isExcluded[address(this)])
        {
            _tOwned[address(this)]+=tMarketing;
        }
        _rOwned[address(this)] +=rMarketing;
    }

    function _takeLiquidity(uint256 rLiquidity, uint256 tLiquidity) private {
        totFeesPaid.liquidity +=tLiquidity;

        if(_isExcluded[address(this)])
        {
            _tOwned[address(this)]+=tLiquidity;
        }
        _rOwned[address(this)] +=rLiquidity;
    }

    function _getValues(uint256 tAmount, bool takeFee, Taxes memory temp) private view returns (valuesFromGetValues memory to_return) {
        to_return = _getTValues(tAmount, takeFee, temp);
        (to_return.rAmount, to_return.rTransferAmount, to_return.rRfi, to_return.rMarketing, to_return.rLiquidity) = _getRValues(to_return, tAmount, takeFee, _getRate());
        return to_return;
    }

    function _getTValues(uint256 tAmount, bool takeFee, Taxes memory temp) private pure returns (valuesFromGetValues memory s) {

        if(!takeFee) {
          s.tTransferAmount = tAmount;
          return s;
        }
        s.tRfi = tAmount*temp.rfi/100;
        s.tMarketing = tAmount*temp.marketing/100;
        s.tLiquidity = tAmount*temp.liquidity/100;
        s.tTransferAmount = tAmount-s.tRfi-s.tMarketing-s.tLiquidity;
        return s;
    }

    function _getRValues(valuesFromGetValues memory s, uint256 tAmount, bool takeFee, uint256 currentRate) private pure returns (uint256 rAmount, uint256 rTransferAmount, uint256 rRfi, uint256 rMarketing, uint256 rLiquidity) {
        rAmount = tAmount*currentRate;

        if(!takeFee) {
          return(rAmount, rAmount, 0,0,0);
        }

        rRfi = s.tRfi*currentRate;
        rMarketing = s.tMarketing*currentRate;
        rLiquidity = s.tLiquidity*currentRate;
        rTransferAmount =  rAmount-rRfi-rMarketing-rLiquidity;
        return (rAmount, rTransferAmount, rRfi,rMarketing,rLiquidity);
    }

    function _getRate() private view returns(uint256) {
        (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
        return rSupply/tSupply;
    }

    function _getCurrentSupply() private view returns(uint256, uint256) {
        uint256 rSupply = _rTotal;
        uint256 tSupply = _tTotal;
        for (uint256 i = 0; i < _excluded.length; i++) {
            if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
            rSupply = rSupply-_rOwned[_excluded[i]];
            tSupply = tSupply-_tOwned[_excluded[i]];
        }
        if (rSupply < _rTotal/_tTotal) return (_rTotal, _tTotal);
        return (rSupply, tSupply);
    }

    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);
    }

    function _transfer(address from, address to, uint256 amount) private {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");
        require(amount <= balanceOf(from),"You are trying to transfer more than your balance");
        require(!_isBot[from] && !_isBot[to], "Bots are not allowed");

        if(!_isExcludedFromFee[from] && !_isExcludedFromFee[to] && to != pair){
            require(balanceOf(to) + amount <= maxWalletBalance, "You are exceeding maxWalletBalance");
        }
    
        uint256 contractTokenBalance = balanceOf(address(this));
        bool canSwap = contractTokenBalance >= swapTokensAtAmount;
        if(!swapping && swapEnabled && canSwap && to == pair && !_isExcludedFromFee[from] &&  !_isExcludedFromFee[to]){
            swapAndLiquify(swapTokensAtAmount);
        }
        
        bool takeFee = false;
        if(!_isExcludedFromFee[from] &&  !_isExcludedFromFee[to] && to == pair || from == pair){
            takeFee = true;
        }

        _tokenTransfer(from, to, amount, takeFee);
    }


    //this method is responsible for taking all fee, if takeFee is true
    function _tokenTransfer(address sender, address recipient, uint256 tAmount, bool takeFee) private {
        Taxes memory temp;
        if(takeFee){
            if(recipient == pair) temp = sellTaxes;
            else if(sender == pair) temp = buyTaxes;
        }
        valuesFromGetValues memory s = _getValues(tAmount, takeFee, temp);

        if (_isExcluded[sender] ) {  //from excluded
                _tOwned[sender] = _tOwned[sender]-tAmount;
        }
        if (_isExcluded[recipient]) { //to excluded
                _tOwned[recipient] = _tOwned[recipient]+s.tTransferAmount;
        }

        _rOwned[sender] = _rOwned[sender]-s.rAmount;
        _rOwned[recipient] = _rOwned[recipient]+s.rTransferAmount;
        if(s.rRfi > 0 || s.tRfi > 0) _reflectRfi(s.rRfi, s.tRfi);
        if(s.rMarketing > 0 || s.tMarketing > 0) _takeMarketing(s.rMarketing,s.tMarketing);
        if(s.rLiquidity > 0 || s.tLiquidity > 0) _takeLiquidity(s.rLiquidity, s.tLiquidity);
        emit Transfer(sender, recipient, s.tTransferAmount);
        emit Transfer(sender, address(this), s.tMarketing + s.tLiquidity);
    }

    function swapAndLiquify(uint256 contractBalance ) private lockTheSwap{
        // Split the contract balance into halves
            uint256 denominator = (sellTaxes.liquidity + sellTaxes.marketing) * 2;
            uint256 tokensToAddLiquidityWith = contractBalance * sellTaxes.liquidity / denominator;
            uint256 toSwap = contractBalance - tokensToAddLiquidityWith;
    
            uint256 initialBalance = address(this).balance;
    
            swapTokensForETH(toSwap);
    
            uint256 deltaBalance = address(this).balance - initialBalance;
            uint256 unitBalance= deltaBalance / (denominator - sellTaxes.liquidity);
            uint256 ethToAddLiquidityWith = unitBalance * sellTaxes.liquidity;
    
            if(ethToAddLiquidityWith > 0){
                // Add liquidity to pancake
                addLiquidity(tokensToAddLiquidityWith, ethToAddLiquidityWith);
            }
    
            uint256 marketingAmt = unitBalance * 2 * sellTaxes.marketing;
            if(marketingAmt > 0){
                payable(marketingWallet).sendValue(marketingAmt);
            }
    }

    function swapTokensForETH(uint256 tokenAmount) private {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = router.WETH();

        _approve(address(this), address(router), tokenAmount);

        router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, 
            path,
            address(this),
            block.timestamp
        );

    }

    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(router), tokenAmount);

        // add the liquidity
        router.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            owner(),
            block.timestamp
        );
    }
    
    function updateMarketingWallet(address newWallet) external onlyOwner{
        marketingWallet = newWallet;
    }

    function updateSwapTokensAtAmount(uint256 amount) external onlyOwner{
        swapTokensAtAmount = amount * 10**_decimals;
    }

    function updateSwapEnabled(bool _enabled) external onlyOwner{
        swapEnabled = _enabled;
    }
    
    function setBot(address _user, bool value) external onlyOwner{
        _isBot[_user] = value;
    }

    function setBuyTaxes(uint256 rfi, uint256 liquidity, uint256 marketing) external onlyOwner{
        buyTaxes = Taxes(rfi, marketing, liquidity);
    }
    function setSellTaxes(uint256 rfi, uint256 liquidity, uint256 marketing) external onlyOwner{
        sellTaxes = Taxes(rfi, marketing, liquidity);
    }
    
    function setMaxWallet(uint256 amount) external onlyOwner{
        maxWalletBalance = amount * 10**_decimals;
    }
    
    function isBot(address _bot) external view returns(bool){
        return _isBot[_bot];
    }


    receive() external payable{
    }
}