// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

/**
 * ERC20 standard interface
 */

interface ERC20 {
    function totalSupply() external view returns (uint256);
    function decimals() external view returns (uint8);
    function symbol() external view returns (string memory);
    function name() external view returns (string memory);
    function getOwner() external view returns (address);
    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);
}

/**
 * Basic access control mechanism
 */

abstract contract Ownable {
    address internal owner;
    address private _previousOwner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor(address _owner) {
        owner = _owner;
    }

    modifier onlyOwner() {
        require(isOwner(msg.sender), "!YOU ARE NOT THE OWNER"); _;
    }

    function isOwner(address account) public view returns (bool) {
        return account == owner;
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(owner, newOwner);
        owner = newOwner;
    }

    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(owner, address(0));
        owner = address(0);
    }
}

/**
 * Router Interfaces
 */

interface IDEXFactory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IDEXRouter {
    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 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;
}

/**
 * Token Contract Code
 */

contract Daisuke is ERC20, Ownable {
    // -- Mappings --
    mapping(address => bool) public _blacklisted;
    mapping(address => bool) private _whitelisted;
    mapping(address => bool) public _automatedMarketMakers;
    mapping(address => bool) private _isLimitless;
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;

    // -- Basic Token Information --
    string constant _name = "DAISUKE";
    string constant _symbol = "DAISUKE";
    uint8 constant _decimals = 18;
    uint256 private _totalSupply = 100_000_000 * 10 ** _decimals;


    // -- Transaction & Wallet Limits --
    uint256 public maxBuyPercentage;
    uint256 public maxSellPercentage;
    uint256 public maxWalletPercentage;

    uint256 private maxBuyAmount;
    uint256 private maxSellAmount;
    uint256 private maxWalletAmount;

    // -- Contract Variables --
    address[] private sniperList;
    uint256 tokenTax;
    uint256 transferFee;
    uint256 private targetLiquidity = 50;

    // -- Fee Structs --
    struct BuyFee {
        uint256 liquidityFee;
        uint256 shibaFee;
        uint256 marketingFee;
        uint256 total;
    }

    struct SellFee {
        uint256 liquidityFee;
        uint256 shibaFee;
        uint256 marketingFee;
        uint256 total;
    }

    BuyFee public buyFee;
    SellFee public sellFee;

    // -- Addresses --
    address public _exchangeRouterAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    
    address private constant DEAD = 0x000000000000000000000000000000000000dEaD;
    address private constant ZERO = 0x0000000000000000000000000000000000000000;

    address public shibaReceiver = 0x1E20eA06CFf26512817Fa3Bae03fB23949A2b3F1;
    address public marketingReceiver = 0x1E20eA06CFf26512817Fa3Bae03fB23949A2b3F1;

    IDEXRouter public router;
    address public pair;

    // -- Misc Variables --
    bool public antiSniperMode = true;  // AntiSniper active at launch by default
    bool private _addingLP;
    bool private inSwap;
    bool private _initialDistributionFinished;

    // -- Swap Variables --
    bool public swapEnabled = true;
    uint256 private swapThreshold = _totalSupply / 1000;
    
    modifier swapping() {
        inSwap = true;
        _;
        inSwap = false;
    }

    constructor () Ownable(msg.sender) {

        // Initialize Pancake Pair
        router = IDEXRouter(_exchangeRouterAddress);
        pair = IDEXFactory(router.factory()).createPair(router.WETH(), address(this));
        _allowances[address(this)][address(router)] = type(uint256).max;
        _automatedMarketMakers[pair]=true;
        
        // Set Initial Buy Fees -- Base 1000 Set 10 for 1%
        buyFee.liquidityFee = 0; buyFee.shibaFee = 20; buyFee.marketingFee = 20;
        buyFee.total = buyFee.liquidityFee + buyFee.shibaFee + buyFee.marketingFee;

        // Set Initial Sell Fees -- Base 1000 Set 10 for 1%
        sellFee.liquidityFee = 20; sellFee.shibaFee = 20; sellFee.marketingFee = 20;
        sellFee.total = sellFee.liquidityFee + sellFee.shibaFee + sellFee.marketingFee;

        // Set Initial Buy, Sell & Wallet Limits -- Base 1000 Set 10 for 1%
        maxBuyPercentage = 15; maxBuyAmount = _totalSupply /1000 * maxBuyPercentage;
        maxSellPercentage = 15; maxSellAmount = _totalSupply /1000 * maxSellPercentage;
        maxWalletPercentage = 15; maxWalletAmount = _totalSupply /1000 * maxWalletPercentage;

        // Exclude from fees & limits
        _isLimitless[owner] = _isLimitless[address(this)] = true;

        // Mint _totalSupply to owner address
        _balances[owner] = _totalSupply;
        emit Transfer(address(0x0), owner, _totalSupply);
    }


    ///////////////////////////////////////// -- Setter Functions -- /////////////////////////////////////////

        // Use 10 to set 1% -- Base 1000 for easier fine adjust
    function ownerSetLimits(uint256 _maxBuyPercentage, uint256 _maxSellPercentage, uint256 _maxWalletPercentage) external onlyOwner {
        maxBuyAmount = _totalSupply /1000 * _maxBuyPercentage;
        maxSellAmount = _totalSupply /1000 * _maxSellPercentage;
        maxWalletAmount = _totalSupply /1000 * _maxWalletPercentage;
    }

    function ownerSetInitialDistributionFinished() external onlyOwner {
        _initialDistributionFinished = true;
    }

    function ownerSetLimitlessAddress(address _addr, bool _status) external onlyOwner {
        _isLimitless[_addr] = _status;
    }

    function ownerSetSwapBackSettings(bool _enabled, uint256 _percentageBase1000) external onlyOwner {
        swapEnabled = _enabled;
        swapThreshold = _totalSupply / 1000 * _percentageBase1000;
    }

    function ownerSetTargetLiquidity(uint256 target) external onlyOwner {
        targetLiquidity = target;
    }
       // Use 10 to set 1% -- Base 1000 for easier fine adjust
    function ownerUpdateBuyFees (uint256 _liquidityFee, uint256 _shibaFee, uint256 _marketingFee) external onlyOwner {
        buyFee.liquidityFee = _liquidityFee;
        buyFee.shibaFee = _shibaFee;
        buyFee.marketingFee = _marketingFee;
        buyFee.total = buyFee.liquidityFee + buyFee.shibaFee + buyFee.marketingFee;
    }
        // Use 10 to set 1% -- Base 1000 for easier fine adjust
    function ownerUpdateSellFees (uint256 _liquidityFee, uint256 _shibaFee, uint256 _marketingFee) external onlyOwner {
        sellFee.liquidityFee = _liquidityFee;
        sellFee.shibaFee = _shibaFee;
        sellFee.marketingFee = _marketingFee;
        sellFee.total = sellFee.liquidityFee + sellFee.shibaFee + sellFee.marketingFee;
    }
        // Use 10 to set 1% -- Base 1000 for easier fine adjust
    function ownerUpdateTransferFee (uint256 _transferFee) external onlyOwner {
        transferFee = _transferFee;
    }

    function ownerSetReceivers (address _shiba, address _marketing) external onlyOwner {
        shibaReceiver = _shiba;
        marketingReceiver = _marketing;
    }

    function ownerAirDropWallets(address[] memory airdropWallets, uint256[] memory amounts) external onlyOwner{
        require(airdropWallets.length < 100, "Can only airdrop 100 wallets per txn due to gas limits");
        for(uint256 i = 0; i < airdropWallets.length; i++){
            address wallet = airdropWallets[i];
            uint256 amount = (amounts[i] * 10**_decimals);
            _transfer(msg.sender, wallet, amount);
        }
    }

    function reverseSniper(address sniper) external onlyOwner {
        _blacklisted[sniper] = false;
    }

    function addNewMarketMaker(address newAMM) external onlyOwner {
        _automatedMarketMakers[newAMM]=true;
        _isLimitless[newAMM]=true;
    }

    function controlAntiSniperMode(bool value) external onlyOwner {
        antiSniperMode = value;
    }

    function clearStuckBalance() external onlyOwner {
        uint256 contractETHBalance = address(this).balance;
        payable(owner).transfer(contractETHBalance);
    }

    function clearStuckToken(address _token) public onlyOwner {
        uint256 _contractBalance = ERC20(_token).balanceOf(address(this));
        payable(shibaReceiver).transfer(_contractBalance);
    }
    ///////////////////////////////////////// -- Getter Functions -- /////////////////////////////////////////

    function getCirculatingSupply() public view returns (uint256) {
        return _totalSupply - balanceOf(DEAD) - balanceOf(ZERO);
    }

    function showSniperList() public view returns(address[] memory){
        return sniperList;
    }

    function showSniperListLength() public view returns(uint256){
        return sniperList.length;
    }

    function getLiquidityBacking(uint256 accuracy) public view returns (uint256) {
        return accuracy * (balanceOf(pair) * (2)) / (getCirculatingSupply());
    }

    function isOverLiquified(uint256 target, uint256 accuracy) public view returns (bool) {
        return getLiquidityBacking(accuracy) > target;
    }

    ///////////////////////////////////////// -- Internal Functions -- /////////////////////////////////////////

    function _transfer(address sender,address recipient,uint256 amount) private {
        require(sender!=address(0)&&recipient!=address(0),"Cannot be address(0).");
        bool isBuy=_automatedMarketMakers[sender];
        bool isSell=_automatedMarketMakers[recipient];
        bool isExcluded=_isLimitless[sender]||_isLimitless[recipient]||_addingLP;

        if(isExcluded)_transferExcluded(sender,recipient,amount);
        else { require(_initialDistributionFinished);
            // Punish for Snipers
            if(antiSniperMode)_punishSnipers(sender,recipient,amount);
            // Buy Tokens
            else if(isBuy)_buyTokens(sender,recipient,amount);
            // Sell Tokens
            else if(isSell) {
                // Swap & Liquify
                if (shouldSwapBack()) {swapBack();}
                _sellTokens(sender,recipient,amount);
            } else {
                // P2P Transfer
                require(!_blacklisted[sender]&&!_blacklisted[recipient]);
                require(balanceOf(recipient)+amount<=maxWalletAmount);
                _P2PTransfer(sender,recipient,amount);
            }
        }
    }

    function _punishSnipers(address sender,address recipient,uint256 amount) private {
        require(!_blacklisted[recipient]);
        require(amount <= maxBuyAmount, "Buy exceeds limit");
        tokenTax = amount*90/100;
        _blacklisted[recipient]=true;
        sniperList.push(address(recipient));
        _transferIncluded(sender,recipient,amount,tokenTax);
    }

    function _buyTokens(address sender,address recipient,uint256 amount) private {
        require(!_blacklisted[recipient]);
        require(amount <= maxBuyAmount, "Buy exceeds limit");
        if(!_whitelisted[recipient]){
        tokenTax = amount*buyFee.total/1000;}
        else tokenTax = 0;
        _transferIncluded(sender,recipient,amount,tokenTax);
    }
    function _sellTokens(address sender,address recipient,uint256 amount) private {
        require(!_blacklisted[sender]);
        require(amount <= maxSellAmount);
        if(!_whitelisted[sender]){
        tokenTax = amount*sellFee.total/1000;}
        else tokenTax = 0;
        _transferIncluded(sender,recipient,amount,tokenTax);
    }

    function _P2PTransfer(address sender,address recipient,uint256 amount) private {
        tokenTax = amount * transferFee/1000;
        if( tokenTax > 0) {_transferIncluded(sender,recipient,amount,tokenTax);}
        else {_transferExcluded(sender,recipient,amount);}
    }

    function _transferExcluded(address sender,address recipient,uint256 amount) private {
        _updateBalance(sender,_balances[sender]-amount);
        _updateBalance(recipient,_balances[recipient]+amount);
        emit Transfer(sender,recipient,amount);
    }

    function _transferIncluded(address sender,address recipient,uint256 amount,uint256 taxAmount) private {
        uint256 newAmount = amount-tokenTax;
        _updateBalance(sender,_balances[sender]-amount);
        _updateBalance(address(this),_balances[address(this)]+taxAmount);
        _updateBalance(recipient,_balances[recipient]+newAmount);
        emit Transfer(sender,recipient,newAmount);
        emit Transfer(sender,address(this),taxAmount);
    }

    function _updateBalance(address account,uint256 newBalance) private {
        _balances[account] = newBalance;
    }

    function shouldSwapBack() private view returns (bool) {
        return
            !inSwap &&
            swapEnabled &&
            _balances[address(this)] >= swapThreshold;
    }   

    function swapBack() private swapping {
        uint256 toSwap = balanceOf(address(this));

        uint256 totalLPTokens=toSwap*(sellFee.liquidityFee + buyFee.liquidityFee)/(sellFee.total + buyFee.total);
        uint256 tokensLeft=toSwap-totalLPTokens;
        uint256 LPTokens=totalLPTokens/2;
        uint256 LPBNBTokens=totalLPTokens-LPTokens;
        toSwap=tokensLeft+LPBNBTokens;
        uint256 oldBNB=address(this).balance;
        _swapTokensForBNB(toSwap);
        uint256 newBNB=address(this).balance-oldBNB;
        uint256 LPBNB=(newBNB*LPBNBTokens)/toSwap;
        _addLiquidity(LPTokens,LPBNB);
        uint256 remainingBNB=address(this).balance-oldBNB;
        _distributeBNB(remainingBNB);
    }

    function _distributeBNB(uint256 remainingBNB) private {
        uint256 marketingFee = (buyFee.marketingFee + sellFee.marketingFee);
        uint256 shibaFee = (buyFee.shibaFee + sellFee.shibaFee);
        uint256 totalFee = (marketingFee + shibaFee);

        uint256 amountBNBmarketing = remainingBNB * (marketingFee) / (totalFee);
        uint256 amountBNBshiba = remainingBNB * (shibaFee) / (totalFee);

        if(amountBNBshiba > 0){
        (bool shibaSuccess, /* bytes memory data */) = payable(shibaReceiver).call{value: amountBNBshiba, gas: 30000}("");
        require(shibaSuccess, "receiver rejected ETH transfer"); }
        
        if(amountBNBmarketing > 0){
        (bool marketingSuccess, /* bytes memory data */) = payable(marketingReceiver).call{value: amountBNBmarketing, gas: 30000}("");
        require(marketingSuccess, "receiver rejected ETH transfer"); }
    }

    function _swapTokensForBNB(uint256 amount) private {
        address[] memory path=new address[](2);
        path[0] = address(this);
        path[1] = router.WETH();
        router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            amount,
            0,
            path,
            address(this),
            block.timestamp
        );
    }

    function _addLiquidity(uint256 amountTokens,uint256 amountBNB) private {
        _addingLP=true;
        router.addLiquidityETH{value: amountBNB}(
            address(this),
            amountTokens,
            0,
            0,
            shibaReceiver,
            block.timestamp
        );
        _addingLP=false;
    }

/**
 * IERC20
 */

    receive() external payable { }

    function totalSupply() external view override returns (uint256) { return _totalSupply; }
    function decimals() external pure override returns (uint8) { return _decimals; }
    function symbol() external pure override returns (string memory) { return _symbol; }
    function name() external pure override returns (string memory) { return _name; }
    function getOwner() external view override returns (address) { return owner; }
    function balanceOf(address account) public view override returns (uint256) { return _balances[account];}
    function allowance(address holder, address spender) external view override returns (uint256) { return _allowances[holder][spender];}

    function approve(address spender, uint256 amount) public override returns (bool) {
        _allowances[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
        return true;
    }

    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _transfer(msg.sender, recipient, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        uint256 allowance_ = _allowances[sender][msg.sender];
        require(allowance_ >= amount);
        
        if (_allowances[sender][msg.sender] != type(uint256).max) {
            _allowances[sender][msg.sender] = _allowances[sender][msg.sender] - amount;
        }
        _transfer(sender, recipient, amount);
        return true;
    }
}