/*

About:
$COFFEE ,the elixir that transforms zombies into functioning humans and makes mornings slightly more bearable. 
But did you ever think that coffee could have a greater purpose? Enter $COFFEE, the memecoin that not only fuels 
our caffeine addiction but also keeps the world running!

Twitter: https://twitter.com/CoffeeTokn
Telegram: https://t.me/CoffeeCoinPortal

*/

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.5;
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;
        return c;
    }
}

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);
}

abstract contract Ownable {
    address internal owner;
    constructor(address _owner) {
        owner = _owner;
    }
    modifier onlyOwner() {
        require(isOwner(msg.sender), "!OWNER"); _;
    }
    function isOwner(address account) public view returns (bool) {
        return account == owner;
    }
    function renounceOwnership() public onlyOwner {
        owner = address(0);
        emit OwnershipTransferred(address(0));
    }  
    event OwnershipTransferred(address owner);
}

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;
}

contract COFFEECOIN is ERC20, Ownable {
    using SafeMath for uint256;
    address routerAdress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    address DEAD = 0x000000000000000000000000000000000000dEaD;

    string constant _name = "CoffeeCoin";
    string constant _symbol = "$COFFEE";
    uint8 constant _decimals = 9;

    uint256 _totalSupply = 420_690_000_000 * (10 ** _decimals); 
    uint256 public _maxWalletAmount = (_totalSupply * 3) / 100; 

    mapping (address => uint256) _balances;
    mapping (address => mapping (address => uint256)) _allowances;

    mapping (address => bool) isFeeExempt;
    mapping (address => bool) isTxLimitExempt;

    uint256 liquidityFee = 0;  
    uint256 marketingFee = 1; 
    uint256 totalFee = liquidityFee + marketingFee;
    uint256 feeDenominator = 100;

    address public marketingFeeReceiver = 0x41AB172FB8DF6f4c5aA751D11465f227b0E3b29f;

    IDEXRouter public router;
    address public pair;

    bool public swapEnabled = true;
    uint256 public swapThreshold = _totalSupply / 10000 * 1; 
    bool inSwap;
    modifier swapping() { inSwap = true; _; inSwap = false; }

    constructor () Ownable(msg.sender) {
        router = IDEXRouter(routerAdress);
        pair = IDEXFactory(router.factory()).createPair(router.WETH(), address(this));
        _allowances[address(this)][address(router)] = type(uint256).max;

        address _owner = owner;
        isFeeExempt[msg.sender] = true;
        isTxLimitExempt[_owner] = true;
        isTxLimitExempt[msg.sender] = true;
        isTxLimitExempt[DEAD] = true;

        _balances[_owner] = _totalSupply;
        emit Transfer(address(0), _owner, _totalSupply);
    }

    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 approveMax(address spender) external returns (bool) {
        return approve(spender, type(uint256).max);
    }

    function transfer(address recipient, uint256 amount) external override returns (bool) {
        return _transferFrom(msg.sender, recipient, amount);
    }

    function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
        if(_allowances[sender][msg.sender] != type(uint256).max){
            _allowances[sender][msg.sender] = _allowances[sender][msg.sender].sub(amount, "Insufficient Allowance");
        }

        return _transferFrom(sender, recipient, amount);
    }

    function _transferFrom(address sender, address recipient, uint256 amount) internal returns (bool) {
        if(inSwap){ return _basicTransfer(sender, recipient, amount); }
        
        if (recipient != pair && recipient != DEAD && recipient != routerAdress && recipient != marketingFeeReceiver && recipient != address(this)) {
            require(isTxLimitExempt[recipient] || _balances[recipient] + amount <= _maxWalletAmount, "Transfer amount exceeds the bag size.");
        }
        
        if(shouldSwapBack() && recipient != DEAD && recipient != marketingFeeReceiver && recipient != address(this)){ swapBack(); } 

        _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");

        uint256 amountReceived = amount;
        if(totalFee >= 1) {
            amountReceived = shouldTakeFee(sender) ? takeFee(sender, amount) : amount;
        } 
        _balances[recipient] = _balances[recipient].add(amountReceived);

        emit Transfer(sender, recipient, amountReceived);
        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 shouldTakeFee(address sender) internal view returns (bool) {
        return !isFeeExempt[sender];
    }

    function takeFee(address sender, uint256 amount) internal returns (uint256) {
        uint256 feeAmount = amount.mul(totalFee).div(feeDenominator);
        _balances[address(this)] = _balances[address(this)].add(feeAmount);
        emit Transfer(sender, address(this), feeAmount);
        return amount.sub(feeAmount);
    }

    function shouldSwapBack() internal view returns (bool) {
        return msg.sender != pair
        && !inSwap
        && swapEnabled
        && _balances[address(this)] >= swapThreshold;
    }
    function toggleSwap (bool _swapEnabled) external onlyOwner {
        swapEnabled = _swapEnabled;
    }


    function swapBack() internal swapping {
        if(totalFee >= 1) {
            uint256 contractTokenBalance = balanceOf(address(this));
            uint256 amountToLiquify = contractTokenBalance.mul(liquidityFee).div(totalFee).div(2);
            uint256 amountToSwap = contractTokenBalance.sub(amountToLiquify);

            address[] memory path = new address[](2);
            path[0] = address(this);
            path[1] = router.WETH();

            uint256 balanceBefore = address(this).balance;

            router.swapExactTokensForETHSupportingFeeOnTransferTokens(
                amountToSwap,
                0,
                path,
                address(this),
                block.timestamp
            );
            uint256 amountETH = address(this).balance.sub(balanceBefore);
            uint256 totalETHFee = totalFee.sub(liquidityFee.div(2));
            uint256 amountETHLiquidity = amountETH.mul(liquidityFee).div(totalETHFee).div(2);
            uint256 amountETHMarketing = amountETH.mul(marketingFee).div(totalETHFee);


            (bool MarketingSuccess, /* bytes memory data */) = payable(marketingFeeReceiver).call{value: amountETHMarketing, gas: 30000}("");
            require(MarketingSuccess, "receiver rejected ETH transfer");

            if(amountToLiquify > 0){
                router.addLiquidityETH{value: amountETHLiquidity}(
                    address(this),
                    amountToLiquify,
                    0,
                    0,
                    marketingFeeReceiver,
                    block.timestamp
                );
                emit AutoLiquify(amountETHLiquidity, amountToLiquify);
            }
        } else {
            uint256 contractTokenBalance = balanceOf(address(this));

            address[] memory path = new address[](2);
            path[0] = address(this);
            path[1] = router.WETH();

            router.swapExactTokensForETHSupportingFeeOnTransferTokens(
                contractTokenBalance,
                0,
                path,
                address(this),
                block.timestamp
            );
        }
    }


    function buyTokens(uint256 amount, address to) internal swapping {
        address[] memory path = new address[](2);
        path[0] = router.WETH();
        path[1] = address(this);

        router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(
            0,
            path,
            to,
            block.timestamp
        );
    }

    function clearStuckBalance() external {
        payable(marketingFeeReceiver).transfer(address(this).balance);
    }

    function setWalletLimit(uint256 amountPercent) external onlyOwner {
        _maxWalletAmount = (_totalSupply * amountPercent ) / 1000;
    }

    function setFee(uint256 _liquidityFee, uint256 _marketingFee) external onlyOwner {
         liquidityFee = _liquidityFee; 
         marketingFee = _marketingFee;
         totalFee = liquidityFee + marketingFee;
    }    
    
    event AutoLiquify(uint256 amountETH, uint256 amountBOG);
}