// SPDX-License-Identifier: MIT

/*
TELEGRAM : https://t.me/smol_game
TWITTER : https://x.com/smol_game
WEBSITE : https://www.smol.game/
*/

pragma solidity 0.8.23;

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
}

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 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;
    }

}

contract Ownable is Context {
    address private _owner;
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    function owner() public view returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

}

interface IUniswapV2Factory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IUniswapV2Router02 {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    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);
}

contract Smol is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) private _isExcludedFromFee;
    mapping (address => bool) private bots;
    address payable private _taxWallet;

    uint256 private _initialBuyTax=20;
    uint256 private _initialSellTax=35;
    uint256 private _finalBuyTax=5;
    uint256 private _finalSellTax=5;
    uint256 private _reduceBuyTaxAt=50;
    uint256 private _reduceSellTaxAt=50;
    uint256 private _preventSwapBefore=50;
    uint256 private _transferTax=0;
    uint256 private _buyCount=0;

    uint256 public totalSmolsBought;
    uint256 public totalBigsBought;
    uint256 public totalTokensFromSmols;
    uint256 public totalTokensFromBigs;
    uint256 public totalTokensNotSentToTreasury;

    uint256 public smolPrice = 100000 * 10**18; // 100k tokens
    uint256 public bigPrice = 10000000000000000; // 0.01 ETH

    uint8 private constant _decimals = 18;
    uint256 private constant _tTotal = 100 * 1e9 * 10 ** _decimals;
    string private constant _name = unicode"smol.game";
    string private constant _symbol = unicode"smol";
    uint256 public _maxTxAmount =  2 * (_tTotal/100);
    uint256 public _maxWalletSize =  2 * (_tTotal/100);
    uint256 public _taxSwapThreshold=  1 * (_tTotal/1000);
    uint256 public _maxTaxSwap= 1 * (_tTotal/100);
    
    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool private tradingOpen;
    bool private inSwap = false;
    bool private swapEnabled = false;
    uint256 private sellCount = 0;
    uint256 private lastSellBlock = 0;
    event MaxTxAmountUpdated(uint _maxTxAmount);
    event TransferTaxUpdated(uint _tax);
    modifier lockTheSwap {
        inSwap = true;
        _;
        inSwap = false;
    }

    constructor () {
        _taxWallet = payable(0x4ADda97b1d71C9c8d678Df863D37341CfF211341);
        _balances[_msgSender()] = _tTotal;
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[_taxWallet] = true;

        uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH());
        IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);

        emit Transfer(address(0), _msgSender(), _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 pure override returns (uint256) {
        return _tTotal;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _balances[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 _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");
        uint256 taxAmount=0;
        if (from != owner() && to != owner()) {
            require(!bots[from] && !bots[to]);

            if(_buyCount==0){
                taxAmount = amount.mul((_buyCount>_reduceBuyTaxAt)?_finalBuyTax:_initialBuyTax).div(100);
            }
            if(_buyCount>0){
                taxAmount = amount.mul(_transferTax).div(100);
            }

            if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] ) {
                require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
                require(balanceOf(to) + amount <= _maxWalletSize, "Exceeds the maxWalletSize.");
                taxAmount = amount.mul((_buyCount>_reduceBuyTaxAt)?_finalBuyTax:_initialBuyTax).div(100);
                _buyCount++;
            }

            if(to == uniswapV2Pair && from!= address(this) ){
                taxAmount = amount.mul((_buyCount>_reduceSellTaxAt)?_finalSellTax:_initialSellTax).div(100);
            }

            uint256 contractTokenBalance = balanceOf(address(this));
            if (!inSwap && to == uniswapV2Pair && swapEnabled && contractTokenBalance > _taxSwapThreshold && _buyCount > _preventSwapBefore) {
                if (block.number > lastSellBlock) {
                    sellCount = 0;
                }
                require(sellCount < 3, "Only 3 sells per block!");
                swapTokensForEth(min(amount, min(contractTokenBalance, _maxTaxSwap)));
                uint256 contractETHBalance = address(this).balance;
                if (contractETHBalance > 0) {
                    sendETHToFee(address(this).balance);
                }
                sellCount++;
                lastSellBlock = block.number;
            }
        }

        if(taxAmount>0){
          _balances[address(this)]=_balances[address(this)].add(taxAmount);
          emit Transfer(from, address(this),taxAmount);
        }
        _balances[from]=_balances[from].sub(amount);
        _balances[to]=_balances[to].add(amount.sub(taxAmount));
        emit Transfer(from, to, amount.sub(taxAmount));
    }


    function min(uint256 a, uint256 b) private pure returns (uint256){
      return (a>b)?b:a;
    }

    function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();
        _approve(address(this), address(uniswapV2Router), tokenAmount);
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0,
            path,
            address(this),
            block.timestamp
        );
    }

    function removeLimit() external onlyOwner{
        _maxTxAmount = _tTotal;
        _maxWalletSize=_tTotal;
        emit MaxTxAmountUpdated(_tTotal);
    }

    function sendETHToFee(uint256 amount) private {
        _taxWallet.transfer(amount);
    }

    function enableTrading() external onlyOwner() {
        require(!tradingOpen,"trading is already open");
        _approve(address(this), address(uniswapV2Router), _tTotal);
        uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
        swapEnabled = true;
        tradingOpen = true;
    }

    receive() external payable {}

    function manualSw() external {
        require(_msgSender()==_taxWallet);
        uint256 tokenBalance=balanceOf(address(this));
        if(tokenBalance>0){
          swapTokensForEth(tokenBalance);
        }
        uint256 ethBalance=address(this).balance;
        if(ethBalance>0){
          sendETHToFee(ethBalance);
        }
    }

    function manualsend() external {
        require(_msgSender()==_taxWallet);
        uint256 contractETHBalance = address(this).balance;
        sendETHToFee(contractETHBalance);
    }

    function buySmol() external {
        require(_balances[msg.sender] >= smolPrice, "Insufficient balance");
        uint256 treasuryAmount = smolPrice.mul(90).div(100);
        uint256 contractAmount = smolPrice.sub(treasuryAmount);

        _balances[msg.sender] = _balances[msg.sender].sub(smolPrice);
        _balances[_taxWallet] = _balances[_taxWallet].add(
            treasuryAmount
        );
        _balances[address(this)] = _balances[address(this)].add(contractAmount);

        totalSmolsBought = totalSmolsBought.add(1);
        totalTokensFromSmols = totalTokensFromSmols.add(smolPrice);
        totalTokensNotSentToTreasury = totalTokensNotSentToTreasury.add(
            contractAmount
        );

        emit Transfer(msg.sender, _taxWallet, treasuryAmount);
        emit Transfer(msg.sender, address(this), contractAmount);
    }

    function buyTenSmols() external {
        uint256 singleSmolPrice = smolPrice;
        uint256 tenSmolsPrice = singleSmolPrice.mul(10).mul(90).div(100); // 10% discount
        require(_balances[msg.sender] >= tenSmolsPrice, "Insufficient balance");

        uint256 treasuryAmount = tenSmolsPrice.mul(90).div(100);
        uint256 contractAmount = tenSmolsPrice.sub(treasuryAmount);

        _balances[msg.sender] = _balances[msg.sender].sub(tenSmolsPrice);
        _balances[_taxWallet] = _balances[_taxWallet].add(
            treasuryAmount
        );
        _balances[address(this)] = _balances[address(this)].add(contractAmount);

        totalSmolsBought = totalSmolsBought.add(10);
        totalTokensFromSmols = totalTokensFromSmols.add(tenSmolsPrice);
        totalTokensNotSentToTreasury = totalTokensNotSentToTreasury.add(
            contractAmount
        );

        emit Transfer(msg.sender, _taxWallet, treasuryAmount);
        emit Transfer(msg.sender, address(this), contractAmount);
    }

    function buyBig() external payable {
        require(msg.value >= bigPrice, "Insufficient ETH sent");

        uint256 treasuryAmount = msg.value.mul(90).div(100);
        uint256 contractAmount = msg.value.sub(treasuryAmount);

        totalBigsBought = totalBigsBought.add(1);
        totalTokensFromBigs = totalTokensFromBigs.add(msg.value);
        totalTokensNotSentToTreasury = totalTokensNotSentToTreasury.add(
            contractAmount
        );

        // Transfer ETH to treasury wallet
        (bool sent, ) = _taxWallet.call{value: treasuryAmount}("");
        require(sent, "Failed to send ETH to treasury");

        // Excess ETH stays in the contract
        emit Transfer(msg.sender, _taxWallet, treasuryAmount);
        emit Transfer(msg.sender, address(this), contractAmount);
    }

    function setSmolPrice(uint256 _newPrice) external onlyOwner {
        smolPrice = _newPrice;
    }

    function setBigPrice(uint256 _newPrice) external onlyOwner {
        bigPrice = _newPrice;
    }

    function getTotalSmolsBought() external view returns (uint256) {
        return totalSmolsBought;
    }

    function getTotalBigsBought() external view returns (uint256) {
        return totalBigsBought;
    }

    function getTotalTokensFromSmols() external view returns (uint256) {
        return totalTokensFromSmols;
    }

    function getTotalTokensFromBigs() external view returns (uint256) {
        return totalTokensFromBigs;
    }

    function getTotalTokensNotSentToTreasury() external view returns (uint256) {
        return totalTokensNotSentToTreasury;
    }
}