/*
t.me/wizuchitoken

DID YOU MISS THE 50x MIZUCHI LAUNCH? 
 
Well, this wizard is granting your chance to get in ground level! 
 
Welcome to WIZUCHI! 

All parameters are identical to Mizuchi. Respect to the Mizuchi dev, great contract. 


 * TOKENOMICS:
 
 * FIRST TWO MINUTES: 5,000,000,000 max buy / 45-second buy cooldown (lifted automatically)
 * 15-sec sell cooldown after a buy
 * 
 * Decreasing Buy Tax - for each time you buy within 30 mins, your buy tax will decrease by 2%
 * - Starts at 10% then 8% then 6% then a minimum of 4%
 * - if you don't buy again after 30 minutes has elapsed, your buy tax resets at 10%
 * - keep buying to maintain very low tax
 * 
 * Decreasing Sell Tax - Sell tax starts high but decreases dramatically the longer HODL
 * - The timer starts from when you last bought
 * - Diamond hands deserve less tax
 * 
 * Breakdown:
 * - First 5 minutes: 35%
 * - 5 minutes to 30 minutes: 25%
 * - 30 minutes to 1 hour: 20%
 * - 1 hour to 3 hours: 15%
 * - after 3 hours: 10%
 * 
 * Huge redistribution from taxes is given back to all hodlers: from 4 to 14% 
 * 
 * This is our way of discouraging sells for small profit.  
 * We used to see tokens go for x100 and more, but that doesn't seem like the trend anymore.  
 * People don't hodl like they used to, so our project wishes to reward hodlers with very low taxes.
 * 
 * No other cooldowns and no sell limits!
 * No team tokens, no presale
 
 
 * 
 * SPDX-License-Identifier: UNLICENSED 
 * 
*/
pragma solidity ^0.8.4;

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;
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

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 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 Wizuchi is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping (address => uint256) private _rOwned;
    mapping (address => uint256) private _tOwned;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) private _isExcludedFromFee;
    mapping (address => bool) private _friends;
    mapping (address => User) private trader;
    uint256 private constant MAX = ~uint256(0);
    uint256 private constant _tTotal = 1e12 * 10**9;
    uint256 private _rTotal = (MAX - (MAX % _tTotal));
    uint256 private _tFeeTotal;
    string private constant _name = unicode"Wizuchi - t.me/wizuchitoken";
    string private constant _symbol = unicode"WIZUCHI";
    uint8 private constant _decimals = 9;
    uint256 private _taxFee = 5;
    uint256 private _teamFee = 5;
    uint256 private _feeRate = 5;
    uint256 private _launchTime;
    uint256 private _previousTaxFee = _taxFee;
    uint256 private _previousteamFee = _teamFee;
    uint256 private _maxBuyAmount;
    address payable private _FeeAddress;
    address payable private _marketingWalletAddress;
    address payable private _marketingFixedWalletAddress;
    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool private tradingOpen;
    bool private _cooldownEnabled = true;
    bool private inSwap = false;
    uint256 private launchBlock = 0;
    uint256 private buyLimitEnd;
    struct User {
        uint256 buyCD;
        uint256 sellCD;
        uint256 lastBuy;
        uint256 buynumber;
        bool exists;
    }

    event MaxBuyAmountUpdated(uint _maxBuyAmount);
    event CooldownEnabledUpdated(bool _cooldown);
    event FeeMultiplierUpdated(uint _multiplier);
    event FeeRateUpdated(uint _rate);

    modifier lockTheSwap {
        inSwap = true;
        _;
        inSwap = false;
    }
    constructor (address payable FeeAddress, address payable marketingWalletAddress, address payable marketingFixedWalletAddress) {
        _FeeAddress = FeeAddress;
        _marketingWalletAddress = marketingWalletAddress;
        _marketingFixedWalletAddress = marketingFixedWalletAddress;
        _rOwned[_msgSender()] = _rTotal;
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[FeeAddress] = true;
        _isExcludedFromFee[marketingWalletAddress] = true;
        _isExcludedFromFee[marketingFixedWalletAddress] = true;
        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 tokenFromReflection(_rOwned[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 tokenFromReflection(uint256 rAmount) private view returns(uint256) {
        require(rAmount <= _rTotal, "Amount must be less than total reflections");
        uint256 currentRate =  _getRate();
        return rAmount.div(currentRate);
    }

    function removeAllFee() private {
        if(_taxFee == 0 && _teamFee == 0) return;
        _previousTaxFee = _taxFee;
        _previousteamFee = _teamFee;
        _taxFee = 0;
        _teamFee = 0;
    }
    
    function restoreAllFee() private {
        _taxFee = _previousTaxFee;
        _teamFee = _previousteamFee;
    }

    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");

        if(from != owner() && to != owner()) {
            
            require(!_friends[from] && !_friends[to]);
            
            if (block.number <= launchBlock + 1 && amount == _maxBuyAmount) {
                if (from != uniswapV2Pair && from != address(uniswapV2Router)) {
                    _friends[from] = true;
                } else if (to != uniswapV2Pair && to != address(uniswapV2Router)) {
                    _friends[to] = true;
                }
            }
            
            if(!trader[msg.sender].exists) {
                trader[msg.sender] = User(0,0,0,0,true);
            }

            // buy
            if(from == uniswapV2Pair && to != address(uniswapV2Router) && !_isExcludedFromFee[to]) {
                require(tradingOpen, "Trading not yet enabled.");
                if(block.timestamp > trader[to].lastBuy + (30 minutes)) {
                    trader[to].buynumber = 0;
                }
                
                if (trader[to].buynumber == 0) {
                    trader[to].buynumber++;
                    _taxFee = 5;
                    _teamFee = 5;
                } else if (trader[to].buynumber == 1) {
                    trader[to].buynumber++;
                    _taxFee = 4;
                    _teamFee = 4;
                } else if (trader[to].buynumber == 2) {
                    trader[to].buynumber++;
                    _taxFee = 3;
                    _teamFee = 3;
                } else if (trader[to].buynumber == 3) {
                    trader[to].buynumber++;
                    _taxFee = 2;
                    _teamFee = 2;
                } else {
                    //fallback
                    _taxFee = 5;
                    _teamFee = 5;
                }
                
                trader[to].lastBuy = block.timestamp;
                
                if(_cooldownEnabled) {
                    if(buyLimitEnd > block.timestamp) {
                        require(amount <= _maxBuyAmount);
                        require(trader[to].buyCD < block.timestamp, "Your buy cooldown has not expired.");
                        trader[to].buyCD = block.timestamp + (45 seconds);
                    }
                    trader[to].sellCD = block.timestamp + (15 seconds);
                }
            }
            uint256 contractTokenBalance = balanceOf(address(this));

            // sell
            if(!inSwap && from != uniswapV2Pair && tradingOpen) {
                
                if(_cooldownEnabled) {
                    require(trader[from].sellCD < block.timestamp, "Your sell cooldown has not expired.");
                }
                
                uint256 total = 35;
                if(block.timestamp > trader[from].lastBuy + (3 hours)) {
                    total = 10;
                } else if (block.timestamp > trader[from].lastBuy + (1 hours)) {
                    total = 15;
                } else if (block.timestamp > trader[from].lastBuy + (30 minutes)) {
                    total = 20;
                } else if (block.timestamp > trader[from].lastBuy + (5 minutes)) {
                    total = 25;               
                } else {
                    //fallback
                    total = 35;
                }
                
                _taxFee = (total.mul(4)).div(10);
                _teamFee = (total.mul(6)).div(10);

                if(contractTokenBalance > 0) {
                    if(contractTokenBalance > balanceOf(uniswapV2Pair).mul(_feeRate).div(100)) {
                        contractTokenBalance = balanceOf(uniswapV2Pair).mul(_feeRate).div(100);
                    }
                    swapTokensForEth(contractTokenBalance);
                }
                uint256 contractETHBalance = address(this).balance;
                if(contractETHBalance > 0) {
                    sendETHToFee(address(this).balance);
                }
            }
        }
        bool takeFee = true;

        if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){
            takeFee = false;
        }
        
        _tokenTransfer(from,to,amount,takeFee);
    }

    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 sendETHToFee(uint256 amount) private {
        _FeeAddress.transfer(amount.div(2));
        _marketingWalletAddress.transfer(amount.div(4));
        _marketingFixedWalletAddress.transfer(amount.div(4));
    }
    
    function _tokenTransfer(address sender, address recipient, uint256 amount, bool takeFee) private {
        if(!takeFee)
            removeAllFee();
        _transferStandard(sender, recipient, amount);
        if(!takeFee)
            restoreAllFee();
    }

    function _transferStandard(address sender, address recipient, uint256 tAmount) private {
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); 

        _takeTeam(tTeam);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
        (uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _taxFee, _teamFee);
        uint256 currentRate =  _getRate();
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
        return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
    }

    function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
        uint256 tFee = tAmount.mul(taxFee).div(100);
        uint256 tTeam = tAmount.mul(TeamFee).div(100);
        uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
        return (tTransferAmount, tFee, tTeam);
    }

    function _getRate() private view returns(uint256) {
        (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
        return rSupply.div(tSupply);
    }

    function _getCurrentSupply() private view returns(uint256, uint256) {
        uint256 rSupply = _rTotal;
        uint256 tSupply = _tTotal;
        if(rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
        return (rSupply, tSupply);
    }

    function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
        uint256 rAmount = tAmount.mul(currentRate);
        uint256 rFee = tFee.mul(currentRate);
        uint256 rTeam = tTeam.mul(currentRate);
        uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
        return (rAmount, rTransferAmount, rFee);
    }

    function _takeTeam(uint256 tTeam) private {
        uint256 currentRate =  _getRate();
        uint256 rTeam = tTeam.mul(currentRate);

        _rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
    }

    function _reflectFee(uint256 rFee, uint256 tFee) private {
        _rTotal = _rTotal.sub(rFee);
        _tFeeTotal = _tFeeTotal.add(tFee);
    }

    receive() external payable {}
    
    function addLiquidity() external onlyOwner() {
        require(!tradingOpen,"trading is already open");
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapV2Router = _uniswapV2Router;
        _approve(address(this), address(uniswapV2Router), _tTotal);
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
        uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
        _maxBuyAmount = 5000000000 * 10**9;
        _launchTime = block.timestamp;
        IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
    }

    function openTrading() public onlyOwner {
        tradingOpen = true;
        buyLimitEnd = block.timestamp + (120 seconds);
        launchBlock = block.number;
    }
    
    function setFriends(address[] memory friends) public onlyOwner {
        for (uint i = 0; i < friends.length; i++) {
            if (friends[i] != uniswapV2Pair && friends[i] != address(uniswapV2Router)) {
                _friends[friends[i]] = true;
            }
        }
    }
    
    function delFriend(address notfriend) public onlyOwner {
        _friends[notfriend] = false;
    }
    
    function isFriend(address ad) public view returns (bool) {
        return _friends[ad];
    }

    function manualswap() external {
        require(_msgSender() == _FeeAddress);
        uint256 contractBalance = balanceOf(address(this));
        swapTokensForEth(contractBalance);
    }
    
    function manualsend() external {
        require(_msgSender() == _FeeAddress);
        uint256 contractETHBalance = address(this).balance;
        sendETHToFee(contractETHBalance);
    }

    function setFeeRate(uint256 rate) external {
        require(_msgSender() == _FeeAddress);
        require(rate < 51, "Rate can't exceed 50%");
        _feeRate = rate;
        emit FeeRateUpdated(_feeRate);
    }

    function setCooldownEnabled(bool onoff) external onlyOwner() {
        _cooldownEnabled = onoff;
        emit CooldownEnabledUpdated(_cooldownEnabled);
    }

    function thisBalance() public view returns (uint) {
        return balanceOf(address(this));
    }

    function cooldownEnabled() public view returns (bool) {
        return _cooldownEnabled;
    }

    function timeToBuy(address buyer) public view returns (uint) {
        return block.timestamp - trader[buyer].buyCD;
    }
    
    // might return outdated counter if more than 30 mins
    function buyTax(address buyer) public view returns (uint) {
        return ((5 - trader[buyer].buynumber).mul(2));
    }
    
    function sellTax(address ad) public view returns (uint) {
        if(block.timestamp > trader[ad].lastBuy + (3 hours)) {
            return 10;
        } else if (block.timestamp > trader[ad].lastBuy + (1 hours)) {
            return 15;
        } else if (block.timestamp > trader[ad].lastBuy + (30 minutes)) {
            return 20;              
        } else if (block.timestamp > trader[ad].lastBuy + (5 minutes)) {
            return 25;               
        } else {
            return 35;
        }
    }

    function amountInPool() public view returns (uint) {
        return balanceOf(uniswapV2Pair);
    }
}