contract SelenaInu is Context, IERC20, Ownable {
    using SafeMath for uint256;
    using Address for address;

    mapping (address => uint256) private _rOwned;
    mapping (address => uint256) private _tOwned;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) private botWallets;
    mapping (address => bool) private _isExcludedFromFee;
    mapping (address => bool) private _isExcluded;
    address[] private _excluded;

    uint256 private constant MAX = ~uint256(0);
    uint256 private _tTotal = 1000000000000 * 10 ** 6 * 10 ** 9;
    uint256 private _rTotal = (MAX - (MAX % _tTotal));
    uint256 private _tFeeTotal;

    string private _name = "SELENA INU";
    string private _symbol = "SELENA";
    uint8 private _decimals = 9;

    uint256 public taxFee = 2;
    uint256 public liquidityFee = 8;
    uint256 public burnFee = 2;
    uint256 public distributionSharePercentage = 75;
    uint256 public marketingFeePercentageage = 33;
    uint256 public investmentFeePercentage = 34;
    uint256 public devFeePercentage = 33;
    
    uint256 private _previousTaxFee = taxFee;
    uint256 private _previousLiquidityFee = liquidityFee;
    
    IUniswapV2Router02 public uniswapV2Router;
    address public uniswapV2Pair;

    bool inSwapAndLiquify;
    bool public swapAndLiquifyEnabled = true;
    uint256 public _maxTxAmount = 1000000000000000 * 10**9;
    uint256 public numTokensSellToAddToLiquidity = 100000000000000 * 10**9;

    address public marketingWallet = 0x72B75111d243Cba98C8746cE261E390366616aA9;
    address public investmentWallet = 0x800C3C9b2b132543917cbB5a54A6E99d47e39A7B;
    address public devWallet = 0x16ce829696166C382e1Dbbb5A1E23e4203Bd06D1;
    address public deadWallet = 0x000000000000000000000000000000000000dEaD;

    event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiqudity
    );

    modifier lockTheSwap {
        inSwapAndLiquify = true;
        _;
        inSwapAndLiquify = false;
    }

    constructor () {
        _rOwned[_msgSender()] = _rTotal;
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[_msgSender()] = true;
        _isExcludedFromFee[marketingWallet] = true;
        _isExcludedFromFee[investmentWallet] = true;
        _isExcludedFromFee[devWallet] = true;
        //multi signature wallets
        _isExcludedFromFee[0xc633D6733b26fdf9f2209a91994F236291aE91B2] = true;
        _isExcludedFromFee[0x2b2386f6Da3784b6941c52b77fd313124b2af7B2] = true;
        _isExcludedFromFee[0x7a38eD4B61F5484B28E75505dD019C94A1537fed] = true;
        _isExcluded[deadWallet] = true;
        _excluded.push(deadWallet);

        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
        uniswapV2Router = _uniswapV2Router;

        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    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 _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 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 returns (bool) {
        _approve(_msgSender(), spender, 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 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 totalFees() public view returns (uint256) {
        return _tFeeTotal;
    }

    function airDrops(address[] calldata newholders, uint256[] calldata amounts) public onlyOwner() {
        uint256 iterator = 0;
        require(newholders.length == amounts.length, "must be the same length");
        while(iterator < newholders.length){
            _tokenTransfer(_msgSender(), newholders[iterator], amounts[iterator] * 10**9, false);
            iterator += 1;
        }
    }

    function setMaxTxAmount(uint256 maxTxAmount) external onlyOwner() {
        _maxTxAmount = maxTxAmount * 10**9;
    }
    function deliver(uint256 tAmount) public {
        address sender = _msgSender();
        require(!_isExcluded[sender], "Excluded addresses cannot call this function");
        (uint256 rAmount,,,,,) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rTotal = _rTotal.sub(rAmount);
        _tFeeTotal = _tFeeTotal.add(tAmount);
    }

    function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
        require(tAmount <= _tTotal, "Amount must be less than supply");
        if (!deductTransferFee) {
            (uint256 rAmount,,,,,) = _getValues(tAmount);
            return rAmount;
        } else {
            (,uint256 rTransferAmount,,,,) = _getValues(tAmount);
            return rTransferAmount;
        }
    }

    function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
        require(rAmount <= _rTotal, "Amount must be less than total reflections");
        uint256 currentRate =  _getRate();
        return rAmount.div(currentRate);
    }

    function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeLiquidity(tLiquidity);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function excludeFromFee(address[] calldata addresses) public onlyOwner {
        addRemoveFee(addresses, true);
    }

    function includeInFee(address[] calldata addresses) public onlyOwner {
        addRemoveFee(addresses, false);
    }

    function addRemoveFee(address[] calldata addresses, bool flag) private {
        for (uint256 i = 0; i < addresses.length; i++) {
            address addr = addresses[i];
            _isExcludedFromFee[addr] = flag;
        }
    }

    function setBurnFee(uint256 fee) external onlyOwner() {
        burnFee = fee;
    }
    
    function setFees(uint256 taxFee_, uint256 liquidityFee_, uint256 marketingFeePercentage_, uint256 investmentFeePercentage_, uint256 devFeePercentage_, 
        uint256 distSharePercentage) external onlyOwner {
        require(marketingFeePercentage_.add(investmentFeePercentage_).add(devFeePercentage_) == 100, "Fee percentage must equal 100");
        taxFee = taxFee_;
        marketingFeePercentageage = marketingFeePercentage_;
        investmentFeePercentage = investmentFeePercentage_;
        devFeePercentage = devFeePercentage_;
        liquidityFee = liquidityFee_;
        distributionSharePercentage = distSharePercentage;
    }

    function setNumTokensToSell(uint256 numTokensSellToAddToLiquidity_) external onlyOwner {
        numTokensSellToAddToLiquidity = numTokensSellToAddToLiquidity_ * 10**9;
    }

    function setWallets(address _marketingWallet, address _investmentWallet, address _devWallet) external onlyOwner {
        marketingWallet = _marketingWallet;
        investmentWallet = _investmentWallet;
        devWallet = _devWallet;
    }

    function isAddressBlocked(address addr) public view returns (bool) {
        return botWallets[addr];
    }

    function claimTokens() external onlyOwner() {
        uint256 numberOfTokensToSell = balanceOf(address(this));
        distributeShares(numberOfTokensToSell);
    }

    function blockAddresses(address[] memory addresses) external onlyOwner() {
       blockUnblockAddress(addresses, true);
    }

    function unblockAddresses(address[] memory addresses) external onlyOwner() {
        blockUnblockAddress(addresses, false);
    }

    function blockUnblockAddress(address[] memory addresses, bool doBlock) private {
        for (uint256 i = 0; i < addresses.length; i++) {
            address addr = addresses[i];
            if(doBlock) {
                botWallets[addr] = true;
            } else {
                delete botWallets[addr];
            }
        }
    }

    function getContractTokenBalance() public view returns (uint256) {
        return balanceOf(address(this));
    }

    function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
        swapAndLiquifyEnabled = _enabled;
        emit SwapAndLiquifyEnabledUpdated(_enabled);
    }

    receive() external payable {}

    function _reflectFee(uint256 rFee, uint256 tFee) private {
        _rTotal = _rTotal.sub(rFee);
        _tFeeTotal = _tFeeTotal.add(tFee);
    }

    function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
        (uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getTValues(tAmount);
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tLiquidity, _getRate());
        return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tLiquidity);
    }

    function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256) {
        uint256 tFee = calculateTaxFee(tAmount);
        uint256 tLiquidity = calculateLiquidityFee(tAmount);
        uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity);
        return (tTransferAmount, tFee, tLiquidity);
    }

    function _getRValues(uint256 tAmount, uint256 tFee, uint256 tLiquidity, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
        uint256 rAmount = tAmount.mul(currentRate);
        uint256 rFee = tFee.mul(currentRate);
        uint256 rLiquidity = tLiquidity.mul(currentRate);
        uint256 rTransferAmount = rAmount.sub(rFee).sub(rLiquidity);
        return (rAmount, rTransferAmount, rFee);
    }

    function _getRate() private view returns(uint256) {
        (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
        return rSupply.div(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.sub(_rOwned[_excluded[i]]);
            tSupply = tSupply.sub(_tOwned[_excluded[i]]);
        }
        if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
        return (rSupply, tSupply);
    }

    function _takeLiquidity(uint256 tLiquidity) private {
        uint256 currentRate =  _getRate();
        uint256 rLiquidity = tLiquidity.mul(currentRate);
        _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity);
        if(_isExcluded[address(this)])
            _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity);
    }

    function calculateTaxFee(uint256 _amount) private view returns (uint256) {
        return _amount.mul(taxFee).div(10**2);
    }

    function calculateLiquidityFee(uint256 _amount) private view returns (uint256) {
        return _amount.mul(liquidityFee).div(10**2);
    }

    function removeAllFee() private {
        if (taxFee == 0 && liquidityFee == 0) return;

        _previousTaxFee = taxFee;
        _previousLiquidityFee = liquidityFee;

        taxFee = 0;
        liquidityFee = 0;
    }

    function restoreAllFee() private {
        taxFee = _previousTaxFee;
        liquidityFee = _previousLiquidityFee;
    }

    function isExcludedFromFee(address account) public view returns(bool) {
        return _isExcludedFromFee[account];
    }

    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");
        if(from != owner() && to != owner() && to != deadWallet)
            require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");

        uint256 contractTokenBalance = balanceOf(address(this));

        if(contractTokenBalance >= _maxTxAmount)
        {
            contractTokenBalance = _maxTxAmount;
        }
        if (contractTokenBalance >= numTokensSellToAddToLiquidity && !inSwapAndLiquify && from != uniswapV2Pair && swapAndLiquifyEnabled) {
            if(contractTokenBalance >= numTokensSellToAddToLiquidity) {
                contractTokenBalance = numTokensSellToAddToLiquidity;
            }
            //distribution shares is the percentage to be shared between marketing, investment, and dev wallets
            //remainder will be for the liquidity pool
            uint256 balanceToShareTokens = contractTokenBalance.mul(distributionSharePercentage).div(100);
            uint256 liquidityPoolTokens = contractTokenBalance.sub(balanceToShareTokens);
            
            //just in case distributionSharePercentage is set to 100%, there will be no tokens to be swapped for liquidity pool
            if(liquidityPoolTokens > 0) {
                //add liquidity
                swapAndLiquify(liquidityPoolTokens);
            }
            //send eth to wallets (marketing, investment, dev)
            distributeShares(balanceToShareTokens);               
        }

        if(from != uniswapV2Pair) {
            require(!botWallets[from] , "bots are not allowed to sell or transfer tokens");
            require(!botWallets[to] , "bots are not allowed to sell or transfer tokens");
        }
        
        bool takeFee = !_isExcludedFromFee[from] && !_isExcludedFromFee[to] && from != owner() && to != owner();
        
        if(takeFee && burnFee > 0) {
            uint256 _burnFeeAmount = amount * burnFee / 100;
            if(_burnFeeAmount > 0) {
                _tokenTransfer(from, deadWallet, _burnFeeAmount, false);
            }
            _tokenTransfer(from, to, amount.sub(_burnFeeAmount), takeFee);
        } else {
           _tokenTransfer(from, to, amount, takeFee);
        }
    }

    function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {

        uint256 half = contractTokenBalance.div(2);
        uint256 otherHalf = contractTokenBalance.sub(half);

        uint256 initialBalance = address(this).balance;

        swapTokensForEth(half);

        uint256 newBalance = address(this).balance.sub(initialBalance);

        addLiquidity(otherHalf, newBalance);
        
        emit SwapAndLiquify(half, newBalance, otherHalf);
    }

    function distributeShares(uint256 balanceToShareTokens) private lockTheSwap {
        
        swapTokensForEth(balanceToShareTokens);
        uint256 balanceToShare = address(this).balance;
        uint256 marketingShare = balanceToShare.mul(marketingFeePercentageage).div(100);
        uint256 investmentShare = balanceToShare.mul(investmentFeePercentage).div(100);
        uint256 devShare = balanceToShare.mul(devFeePercentage).div(100);

        payable(marketingWallet).transfer(marketingShare);
        payable(investmentWallet).transfer(investmentShare);
        payable(devWallet).transfer(devShare);

    }

    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] = uniswapV2Router.WETH();

        _approve(address(this), address(uniswapV2Router), tokenAmount);

        // make the swap
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp
        );
    }

    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(uniswapV2Router), tokenAmount);

        // add the liquidity
        uniswapV2Router.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            owner(),
            block.timestamp
        );
    }

    //this method is responsible for taking all fee, if takeFee is true
    function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private {

        if(!takeFee)
            removeAllFee();

        if (_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferFromExcluded(sender, recipient, amount);
        } else if (!_isExcluded[sender] && _isExcluded[recipient]) {
            _transferToExcluded(sender, recipient, amount);
        } else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferStandard(sender, recipient, amount);
        } else if (_isExcluded[sender] && _isExcluded[recipient]) {
            _transferBothExcluded(sender, recipient, amount);
        } else {
            _transferStandard(sender, recipient, amount);
        }

        if(!takeFee)
            restoreAllFee();
    }

    function _transferStandard(address sender, address recipient, uint256 tAmount) private {
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeLiquidity(tLiquidity);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeLiquidity(tLiquidity);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeLiquidity(tLiquidity);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

}
function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private {

    if(!takeFee)
        removeAllFee();

    if (_isExcluded[sender] && !_isExcluded[recipient]) {
        _transferFromExcluded(sender, recipient, amount);
    } else if (!_isExcluded[sender] && _isExcluded[recipient]) {
        _transferToExcluded(sender, recipient, amount);
    } else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
        _transferStandard(sender, recipient, amount);
    } else if (_isExcluded[sender] && _isExcluded[recipient]) {
        _transferBothExcluded(sender, recipient, amount);
    } else {
        _transferStandard(sender, recipient, amount);
    }

    if(!takeFee)
        restoreAllFee();
}

//this method is responsible for taking all fee, if takeFee is true