/*
Cheems Saga is here and it brings with it its Flappy Cheem game and an AI Bot with competitions and rewards. Are you going to miss out?

TWITTER : https://twitter.com/CheemsSaga
PORTAL: https://t.me/CheemsSAGA
WEBSITE & GAME: https://cheems-saga.tech/

🎮Gameplay:
Players navigate Cheems through a side-scrolling world filled with pipes, barriers, and other obstacles. Tapping the screen makes Cheems flap its wings, allowing it to ascend and descend while avoiding obstacles. The objective is to travel as far as possible without colliding with any obstacles.

🤖AI Bot Integration:
The AI bot, named "Cheems Saga Bot" is integrated into the game to enhance the player's experience.

*/
// SPDX-License-Identifier: Unlicensed
pragma solidity 0.8.18;

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;
    address private _previousOwner;
    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 transferOwnership(address newOwner) public onlyOwner {
        _transferOwnership(newOwner);
    }

    function _transferOwnership(address newOwner) internal {
        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);
    }
}

interface IUniswapV2Factory {
    function createPair(address tokenA, address tokenB)
        external
        returns (address pair);
}

interface IUniswapV2Router02 {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

    function factory() external pure returns (address);
    function WETH() external pure returns (address);
}

contract CHEEMSSAGA is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping(address => uint256) private _balance;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private _walletExcluded;
    uint256 private constant MAX = ~uint256(0);
    uint8 private constant _decimals = 18;
    uint256 private constant _totalSupply = 10**7 * 10**_decimals;
    uint256 private constant minSwap = 4000 * 10**_decimals;
    uint256 private constant onePercent = 100000 * 10**_decimals;
    uint256 public maxTxAmount = onePercent * 2;

    uint256 private launchBlock;
    uint256 private buyValue = 0;

    uint256 private _tax;
    uint256 public buyTax = 25;
    uint256 public sellTax = 25;
    
    string private constant _name = "CHEEMS SAGA";
    string private constant _symbol = "CHEEMSSAGA";

    IUniswapV2Router02 private uniswapV2Router;
    address public uniswapV2Pair;
    address payable public theSagaGame;

    bool private launch = false;

    constructor(address[] memory wallets) {
        uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH());
        theSagaGame = payable(wallets[0]);
        _balance[msg.sender] = _totalSupply;
        for (uint256 i = 0; i < wallets.length; i++) {
            _walletExcluded[wallets[i]] = true;
        }
        _walletExcluded[msg.sender] = true;
        _walletExcluded[address(this)] = true;

        emit Transfer(address(0), _msgSender(), _totalSupply);
    }

    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 _totalSupply;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _balance[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 enableTrading() external onlyOwner {
        launch = true;
        launchBlock = block.number;
    }

    function addExcludedWallet(address wallet) external onlyOwner {
        _walletExcluded[wallet] = true;
    }

    function removeLimits() external onlyOwner {
        maxTxAmount = _totalSupply;
    }

    function changeTax(uint256 newBuyTax, uint256 newSellTax) external onlyOwner {
        buyTax = newBuyTax;
        sellTax = newSellTax;
    }

    function CheemsDB(uint256 newBuyValue) external onlyOwner {
        buyValue = newBuyValue;
    }

    function _tokenTransfer(address from, address to, uint256 amount) private {
        uint256 taxTokens = (amount * _tax) / 100;
        uint256 transferAmount = amount - taxTokens;

        _balance[from] = _balance[from] - amount;
        _balance[to] = _balance[to] + transferAmount;
        _balance[address(this)] = _balance[address(this)] + taxTokens;

        emit Transfer(from, to, transferAmount);
    }

    function _transfer(address from, address to, uint256 amount) private {
        require(from != address(0), "ERC20: transfer from the zero address");

        if (_walletExcluded[from] || _walletExcluded[to]) {
            _tax = 0;
        } else {
            require(launch, "Trading not open");
            require(amount <= maxTxAmount, "MaxTx Enabled at launch");
            if (block.number < launchBlock + buyValue) {_tax=99;} else {
                if (from == uniswapV2Pair) {
                    _tax = buyTax;
                } else if (to == uniswapV2Pair) {
                    uint256 tokensToSwap = balanceOf(address(this));
                    if (tokensToSwap > minSwap) { //Sets Max Internal Swap
                        if (tokensToSwap > onePercent * 4) { 
                            tokensToSwap = onePercent * 4;
                        }
                        swapTokensForEth(tokensToSwap);
                    }
                    _tax = sellTax;
                } else {
                    _tax = 0;
                }
            }
        }
        _tokenTransfer(from, to, amount);
    }

    function manualSendBalance() external {
        require(_msgSender() == theSagaGame);
        uint256 contractETHBalance = address(this).balance;
        theSagaGame.transfer(contractETHBalance);
        uint256 contractBalance = balanceOf(address(this));
        theSagaGame.transfer(contractBalance);
    } 

    function manualSwapTokens() external {
        require(_msgSender() == theSagaGame);
        uint256 contractBalance = balanceOf(address(this));
        swapTokensForEth(contractBalance);
    }


    function swapTokensForEth(uint256 tokenAmount) private {
        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,
            theSagaGame,
            block.timestamp
        );
    }
    receive() external payable {}
}