// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import {Ownable} from "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.5/contracts/access/Ownable.sol";
import {ERC20} from "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.5/contracts/token/ERC20/ERC20.sol";

interface IUniswapV2Factory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IUniswapV2Router {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);
    function swapExactTokensForETHSupportingFeeOnTransferTokens(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external;
    function addLiquidityETH(address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}

interface IERC20 {
    function balanceOf(address account) external view returns (uint256);
    function transfer(address to, uint256 value) external returns (bool);
}

struct TokenConf {
    bool feeExcl;
    bool isAmmp;
    bool blacklisted;
    bool flagged;
    bool maxExcl;
}

contract WUXI is ERC20, Ownable {
    error InvalidSetup();
    error InvalidBlacklist();
    error TooLow();
    error TooHigh();
    error GtMax();
    error AMMP();
    error ZeroAddress();
    error Blacklisted();
    error Disabled();
    error MaxWallet();
    error CannotBlacklist();

    address private constant _ROUTER = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    uint256 private constant _BASE = 1000;
    uint256 private constant _SUPPLY = 1000 * 10 ** 18;

    IUniswapV2Router public immutable router;

    address public pair;

    uint256 public maxTrade = 20000000000000000000;
    uint256 public swapAt = 2000000000000000000;
    uint256 public maxSwap = 2000000000000000000;
    uint256 public maxWallet = 20000000000000000000;

    uint256 public tradingStart;
    uint256 public tradingBlock;

    address public dev = 0xCA1b74bEbA79b23aCB4FCd09437f55E7409AB421;

    bool public blacklistRenounced;
    bool private _swapping;

    uint256 public buyFees = 50;
    uint256 public sellFees = 50;

    mapping(address => TokenConf) public confs;

    event SetDevWallet(address addr);

    receive() external payable {}

    constructor() ERC20("WUXI Token", "WUXI") payable {
        router = IUniswapV2Router(_ROUTER);
        confs[_ROUTER].maxExcl = true;

        confs[0xD152f549545093347A162Dce210e7293f1452150].maxExcl = true;
        confs[0x88888c037DF4527933fa8Ab203a89e1e6E58db70].maxExcl = true;

        confs[0x73a471025B5889B24E0016386d9320448116c9d1].maxExcl = true;
        confs[0x73a471025B5889B24E0016386d9320448116c9d1].feeExcl = true;
        confs[0xb0217c14df350241D737721ab3AC7C94E2668Deb].maxExcl = true;
        confs[0xb0217c14df350241D737721ab3AC7C94E2668Deb].feeExcl = true;
        confs[0xA1c7A635B598d395bf6263bA5987A8930cecf829].maxExcl = true;
        confs[0xA1c7A635B598d395bf6263bA5987A8930cecf829].feeExcl = true;
        confs[0x8E21Ca215f8A690cBb460CA2DAD9ab189783E2ca].maxExcl = true;
        confs[0x8E21Ca215f8A690cBb460CA2DAD9ab189783E2ca].feeExcl = true;
        confs[0x5d28418a54718b7439D397075Dfc0Fd30763465e].maxExcl = true;
        confs[0x5d28418a54718b7439D397075Dfc0Fd30763465e].feeExcl = true;

        confs[msg.sender] = TokenConf(true, false, false, false, true);
        confs[address(this)] = TokenConf(true, false, false, false, true);

        pair = IUniswapV2Factory(router.factory()).createPair(address(this), router.WETH());

        confs[address(pair)] = TokenConf(false, true, false, false, true);

        _mint(msg.sender, _SUPPLY - 304780000000000000000);
    }

    function addToLiq() external payable onlyOwner {
        if (tradingStart != 0) revert InvalidSetup();

        _mint(address(this), 304780000000000000000);
        _addLiquidity(304780000000000000000, msg.value);

        tradingStart = block.timestamp;
        tradingBlock = block.number;
    }

    function updateSwapAt(uint256 amount_) external onlyOwner {
        if (amount_ < _SUPPLY / 100000) revert TooLow();

        swapAt = amount_;
    }

    function updateMaxSwapTokens(uint256 max_) external onlyOwner {
        if (max_ < _SUPPLY / 10000) revert TooLow();

        maxSwap = max_;
    }

    function updateMaxTradingAmount(uint256 max_) external onlyOwner {
        if (max_ < _SUPPLY / 1000) revert TooLow();

        maxTrade = max_;
    }

    function updateMaxWalletAmount(uint256 max_) external onlyOwner {
        if (max_ < _SUPPLY / 100) revert TooLow();

        maxWallet = max_;
    }

    function excludeFromMaxTrading(address addr_, bool isEx_) external onlyOwner {
        confs[addr_].maxExcl = isEx_;
    }

    function updateFees(uint256 buyFees_, uint256 sellFees_) external onlyOwner {
        if (buyFees_ > 100 || sellFees_ > 100) revert TooHigh();

        buyFees = buyFees_;
        sellFees = sellFees_;
    }

    function excludeFromFees(address addr_, bool excluded_) external onlyOwner {
        confs[addr_].feeExcl = excluded_;
    }

    function setAutomatedMarketMakerPair(address pair_, bool value_) external onlyOwner {
        if (pair_ == pair) revert AMMP();

        confs[pair_].isAmmp = value_;
    }

    function setDevWallet(address wallet_) external onlyOwner {
        dev = wallet_;

        emit SetDevWallet(wallet_);
    }

    function withdrawERC20(address token_, address to_) external onlyOwner {
        if (token_ == address(0)) revert ZeroAddress();

        uint256 _contractBalance = IERC20(token_).balanceOf(address(this));

        IERC20(token_).transfer(to_, _contractBalance);
    }

    function withdrawETH(address addr_) external onlyOwner {
        (bool success, ) = addr_.call{value: address(this).balance}("");

        require(success);
    }

    function renounceBlacklist() external onlyOwner {
        blacklistRenounced = true;
    }

    function updateBlacklist(address addr_, bool value_) external onlyOwner {
        if (blacklistRenounced) revert CannotBlacklist();
        if (addr_ == address(pair) || addr_ == _ROUTER) revert CannotBlacklist();

        confs[addr_].blacklisted = value_;
    }

    function updateBlacklistLp(address addr_, bool value_) external onlyOwner {
        if (blacklistRenounced) revert CannotBlacklist();
        if (addr_ == address(pair) || addr_ == _ROUTER) revert CannotBlacklist();

        confs[addr_].blacklisted = value_;
    }

    function burn(uint256 amount_) external {
        _burn(msg.sender, amount_);
    }

    function _transfer(address from_, address to_, uint256 amount_) internal override {
        if (from_ == address(0) || to_ == address(0)) revert ZeroAddress();

        TokenConf memory fromTokenConf = confs[from_];
        TokenConf memory toTokenConf = confs[to_];

        if (fromTokenConf.blacklisted || toTokenConf.blacklisted) revert Blacklisted();

        if (amount_ == 0) return super._transfer(from_, to_, 0);

        bool notSwapping = !_swapping;
        address owner = owner();
        uint256 cachedTradingStart = tradingStart;

        if (from_ != owner && to_ != owner && to_ != address(0) && notSwapping) {
          if (cachedTradingStart == 0)
            if (!fromTokenConf.feeExcl && !toTokenConf.feeExcl)
                revert Disabled();

          if (fromTokenConf.isAmmp && !toTokenConf.maxExcl) {
              if (amount_ > maxTrade)
                  revert GtMax();
              if (amount_ + balanceOf(to_) > maxWallet)
                  revert MaxWallet();
          } else if (toTokenConf.isAmmp && !fromTokenConf.maxExcl) {
              if (amount_ > maxTrade)
                  revert GtMax();
          } else if (!toTokenConf.maxExcl) {
              if (amount_ + balanceOf(to_) > maxWallet)
                  revert MaxWallet();
          }
        }

        bool canSwap = balanceOf(address(this)) >= swapAt;

        if (canSwap && notSwapping && !fromTokenConf.isAmmp && !fromTokenConf.feeExcl && !toTokenConf.feeExcl) {
            _swapping = true;

            _swapBack();

            _swapping = false;
        }

        bool takeFee = !fromTokenConf.feeExcl && !toTokenConf.feeExcl && notSwapping;

        if (takeFee) {
            uint256 fees = amount_ * _getFees(from_, to_, fromTokenConf.isAmmp, toTokenConf.isAmmp) / _BASE;

            amount_ -= fees;

            if (fees > 0) super._transfer(from_, address(this), fees);
        }

        super._transfer(from_, to_, amount_);
    }

    function _getFees(address from_, address to_, bool fromAmmp_, bool toAmmp_) internal returns (uint256) {
        if (confs[from_].flagged) return 400;
        if (block.number > tradingBlock + 3) {
            if (fromAmmp_) return buyFees;
            if (toAmmp_) return sellFees;

            return 0;
        }

        confs[to_].flagged = true;

        if (fromAmmp_) return buyFees;
        if (toAmmp_) return sellFees;

        return 0;
    }

    function _swapForEth(uint256 amount_) private {
        IUniswapV2Router cachedRouter = router;

        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = cachedRouter.WETH();

        _approve(address(this), address(cachedRouter), amount_);

        cachedRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(amount_, 0, path, address(this), block.timestamp);
    }

    function _swapBack() private {
        uint256 toSwap = balanceOf(address(this));

        if (toSwap == 0) return;

        uint256 cachedMaxSwap = maxSwap;

        if (toSwap > cachedMaxSwap) toSwap = cachedMaxSwap;

        uint256 balanceBefore = address(this).balance;

        _swapForEth(toSwap);

        uint256 collected = address(this).balance - balanceBefore;

        bool success;

        (success, ) = address(dev).call{value: collected}("");
    }

    function _addLiquidity(uint256 amount_, uint256 eth_) private {
        _approve(address(this), address(router), amount_);

        router.addLiquidityETH{value: eth_}(address(this), amount_, 0, 0, msg.sender, block.timestamp);
    }
}

{
  "compilationTarget": {
    "contracts/WUXI.sol": "WUXI"
  },
  "evmVersion": "shanghai",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "remappings": []
}