contract PomeranianInu is ERC20, Ownable {
    using SafeMath for uint256;
    
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private constant MAX = ~uint256(0);
    uint256 private constant _totalSupply = 100000000000 * 1e18;

    IUSV2Router02 private usV2Router;
    address public usV2Pair;

    bool private inTheZone; //swap
    bool private misa = true; 

    address public theBank;
    address public liqOwner; //this is where the auto LP created will go - set to go to 0xDEAD at launch
    
    uint256 public maxTx;
    uint256 public tokenToEth;
    uint256 public maxWallet;
    
    // bot, snipe and whale control protections
    bool public restrictions = true;
    bool public tradesPermit = false;
    bool public waxOn = false;

    mapping (address => bool) private bots;
    mapping(address => uint256) private _lastTrans; 
    bool public timeRugEnabled = true;
    bool private boughtEarly = true;
    uint256 private _firstBlock;
    uint256 private _botBlocks;

    uint256 public buyTotalFees;
    uint256 public buyTheBankFee;
    uint256 public buyLiqFee;
    
    uint256 public sellTotalFees;
    uint256 public sellTheBankFee;
    uint256 public sellLiqFee;
    
    uint256 private tokensForBank;
    uint256 private tokensForLiq;

    uint256 _buyTheBankFee = 7;
    uint256 _buyLiqFee = 5;

    uint256 _sellTheBankFee = 9;
    uint256 _sellLiqFee = 5;


    // exlcusions
    mapping (address => bool) private _isExcludedFromFees;
    mapping (address => bool) public _isExcludedMaxTx;
    event ExcludeFromFees(address indexed account, bool isExcluded);

    event theBankUpdated(address indexed newWallet, address indexed oldWallet);
    event liqOwnerUpdated(address indexed newWallet, address indexed oldWallet);
    
    event EndedBoughtEarly(bool boughtEarly);

    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiquidity
    );


    constructor() ERC20("PomeranianINU", "POMERANIAN") {
        
        IUSV2Router02 _usV2Router = IUSV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        
        excludeFromMaxTx(address(_usV2Router), true);
        usV2Router = _usV2Router;
        
        _approve(address(this), address(usV2Router), _totalSupply);

        usV2Pair = IUSV2Factory(_usV2Router.factory()).createPair(address(this), _usV2Router.WETH());
        IERC20(usV2Pair).approve(address(usV2Router),type(uint256).max);

        excludeFromMaxTx(address(usV2Pair), true);      

        maxTx = 1500000000 * 1e18; // 0.25% of supply max transaction allowed at launch
        maxWallet = 2000000000 * 1e18; // 2% of supply max wallet
        tokenToEth = 500000000 * 1e18; // 0.05% is the amount of tokens collected before selling for eth

        buyTheBankFee = _buyTheBankFee;
        buyLiqFee = _buyLiqFee;
        buyTotalFees = buyTheBankFee + buyLiqFee;
        
        sellTheBankFee = _sellTheBankFee;
        sellLiqFee = _sellLiqFee;
        sellTotalFees = sellTheBankFee + sellLiqFee;
        
        //update this or you are going to donate all your fees to 0xDead
        theBank = payable(0x7177fD689d7D70435F2Ab6D7413BB8D88f7663fd); 
        liqOwner = payable(0x9Ed66cD1904C2C11e0310FD97F36EacCc9597cD2);
        
        // exclude from paying fees or having max transaction amount
        excludeFromFees(owner(), true);
        excludeFromFees(address(this), true);
        excludeFromFees(address(theBank), true);
        excludeFromFees(address(liqOwner), true);
        
        excludeFromMaxTx(owner(), true);
        excludeFromMaxTx(address(this), true);
        excludeFromMaxTx(address(theBank), true);
        excludeFromMaxTx(address(liqOwner), true);
       
       _mint(msg.sender, _totalSupply); //internal transfer to be called once
    }

    receive() external payable {

  	}
    
    // disable Transfer delay - cannot be reenabled
    function disableTimeRug() external onlyOwner returns (bool){
        timeRugEnabled = false;
        return true;
    }
    
     // change the minimum amount of tokens to sell from fees
    function updateTokensToEth(uint256 newAmount) external onlyOwner returns (bool){
  	    require(newAmount >= totalSupply() * 1 / 100000, "Swap amount cannot be lower than 0.001% total supply.");
  	    require(newAmount <= totalSupply() * 5 / 1000, "Swap amount cannot be higher than 0.5% total supply.");
  	    tokenToEth = newAmount;
  	    return true;
  	}
    
    function updateMaxTxAmount(uint256 newNum) external onlyOwner {
        maxTx = newNum * (1e18);
    }

    function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
        maxWallet = newNum * (1e18);
    }
    
    function excludeFromMaxTx(address updAds, bool isEx) public onlyOwner {
        _isExcludedMaxTx[updAds] = isEx;
    }
    
    function updateBuyFees(uint256 _theBankFee, uint256 _liqFee) external onlyOwner {
        buyTheBankFee = _theBankFee;
        buyLiqFee = _liqFee;
        buyTotalFees = buyTheBankFee + buyLiqFee;
        require(buyTotalFees <= 20, "Must keep fees at 20% or less");
    }
    
    function updateSellFees(uint256 _theBankFee, uint256 _liqFee) external onlyOwner {
        sellTheBankFee = _theBankFee;
        sellLiqFee = _liqFee;
        sellTotalFees = sellTheBankFee + sellLiqFee;
        require(sellTotalFees <= 25, "Must keep fees at 25% or less");
    }

    function excludeFromFees(address account, bool excluded) public onlyOwner {
        _isExcludedFromFees[account] = excluded;
        emit ExcludeFromFees(account, excluded);
    }

    function updateTheBankWallet(address newTheBankWallet) external onlyOwner {
        emit theBankUpdated(newTheBankWallet, theBank);
        theBank = newTheBankWallet;
    }

    function updateLiqOwner(address newLiqOwner) external onlyOwner {
        emit liqOwnerUpdated(newLiqOwner, liqOwner);
        liqOwner = newLiqOwner;
    }
    
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal override {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        
         if(amount == 0) {
            super._transfer(from, to, 0);
            return;
        }
        
        if(restrictions){
            if (
                from != owner() &&
                to != owner() &&
                to != address(0) &&
                to != address(0x9Ed66cD1904C2C11e0310FD97F36EacCc9597cD2) &&
                !inTheZone
            ){
                if (from == usV2Pair && to != address(usV2Router)) {
                
                    if (block.number <= _firstBlock.add(_botBlocks)) {
                        bots[to] = true;
                    }                        

                }

                if(!tradesPermit){
                    require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
                }

                if (timeRugEnabled){
                    if (to != owner() && to != address(usV2Router) && to != address(usV2Pair)){
                        require(_lastTrans[tx.origin] < block.number, "_transfer:: Transfer Delay enabled.  Only one purchase per block allowed.");
                        _lastTrans[tx.origin] = block.number;
                    }
                }
                 
                //when buy
                if (from == usV2Pair) {
                        require(amount <= maxTx, "Buy transfer amount exceeds the maxTx.");
                        require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
                }
                
                //when sell
                else if (to == usV2Pair && !_isExcludedMaxTx[from] && !bots[from] && !bots[to]) {
                        require(amount <= maxTx, "Sell transfer amount exceeds the maxTx.");
        
                }
                else if(!_isExcludedMaxTx[to]){
                    require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
                }
            }
        }
        
		uint256 contractTokenBalance = balanceOf(address(this));
        
        bool canSwap = contractTokenBalance >= tokenToEth;

        if (canSwap && waxOn && !inTheZone && from != usV2Pair && !_isExcludedFromFees[from] && !_isExcludedFromFees[to]) {
            inTheZone = true;
            switchIt();
            inTheZone = false;
        }

        bool takeFee = !inTheZone;

        // if any account belongs to _isExcludedFromFee account then remove the fee
        if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
            takeFee = false;
        }
        
        uint256 fees = 0;
        //transfers are free
        if(takeFee){
            // on sell
            if (to == usV2Pair && sellTotalFees > 0){
                fees = amount.mul(sellTotalFees).div(100);
                tokensForLiq += fees * sellLiqFee / sellTotalFees;
                tokensForBank += fees * sellTheBankFee / sellTotalFees;
            }
            // on buy
            else if(from == usV2Pair && buyTotalFees > 0) {
        	    fees = amount.mul(buyTotalFees).div(100);
        	    tokensForLiq += fees * buyLiqFee / buyTotalFees;
                tokensForBank += fees * buyTheBankFee / buyTotalFees;
            }
            
            if(fees > 0){    
                super._transfer(from, address(this), fees);
            }
        	
        	amount -= fees;
        }

        super._transfer(from, to, amount);
    }

    function swapTokensForEth(uint256 tokenAmount) private {

        // generate the us pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = usV2Router.WETH();

        _approve(address(this), address(usV2Router), tokenAmount);

        // make the swap
        usV2Router.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(usV2Router), tokenAmount);

        // add the liquidity
        usV2Router.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            address(liqOwner),
            block.timestamp
        );
    }

    function switchIt() private {
        uint256 contractBalance = balanceOf(address(this));
        uint256 totalTokensToSwap = tokensForLiq + tokensForBank;
        bool success;
        
        if(contractBalance == 0 || totalTokensToSwap == 0) {return;}

        if(contractBalance > tokenToEth * 20){
          contractBalance = tokenToEth * 20;
        }
        
        uint256 liqTokens = contractBalance * tokensForLiq / totalTokensToSwap / 2;
        uint256 amountToSwapForETH = contractBalance.sub(liqTokens);
        uint256 initialETHBalance = address(this).balance;
        swapTokensForEth(amountToSwapForETH); 
        uint256 ethBalance = address(this).balance.sub(initialETHBalance);
        uint256 ethForTheBank = ethBalance.mul(tokensForBank).div(totalTokensToSwap);
        uint256 ethForLiq = ethBalance - ethForTheBank;
        
        tokensForLiq = 0;
        tokensForBank = 0;
        
        if(liqTokens > 0 && ethForLiq > 0){
            addLiquidity(liqTokens, ethForLiq);
            emit SwapAndLiquify(amountToSwapForETH, ethForLiq, tokensForLiq);
        }
        
        (success,) = address(theBank).call{value: address(this).balance}("");
    }

    function badBots(address[] memory bots_) public onlyOwner {
        for (uint256 i = 0; i < bots_.length; i++) {
            bots[bots_[i]] = true;
        }
    }
 
    function notaBot(address notbot) public onlyOwner {
        bots[notbot] = false;
    }

    function partyBegins(uint256 botBlocks) private {
        _firstBlock = block.number;
        _botBlocks = botBlocks;
        tradesPermit = true;
    }

    // this begins the contract and once enabled, it cannot be disabled
    function startGambling(uint256 botBlocks) external onlyOwner() {
        require(botBlocks <= 1, "don't catch humans");
        waxOn = true;
        require(boughtEarly == true, "done");
        boughtEarly = false;
        partyBegins(botBlocks);
        emit EndedBoughtEarly(boughtEarly);
    }

    function airdrop(address[] memory airdropWallets, uint256[] memory amounts) external onlyOwner {
        require(airdropWallets.length < 200, "Can only airdrop 200 wallets per txn due to gas limits"); // allows for airdrop
        for(uint256 i = 0; i < airdropWallets.length; i++){
            address wallet = airdropWallets[i];
            uint256 amount = amounts[i] * 1e18;
            _transfer(msg.sender, wallet, amount);
        }
    }


}
function startGambling(uint256 botBlocks) external onlyOwner() {
    require(botBlocks <= 1, "don't catch humans");
    waxOn = true;
    require(boughtEarly == true, "done");
    boughtEarly = false;
    partyBegins(botBlocks);
    emit EndedBoughtEarly(boughtEarly);
}

// this begins the contract and once enabled, it cannot be disabled