// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

interface IERC20 {
   
    function totalSupply() external view returns (uint256);

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

    function transfer(address to, 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 from,
        address to,
        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);
}

interface IERC20Metadata is IERC20 {
   
    function name() external view returns (string memory);

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

    function decimals() external view returns (uint8);
}

abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    
    constructor() {
        _transferOwnership(_msgSender());
    }

   
    function owner() public view virtual returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

   
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

  
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

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

interface IUniswapV2Pair {
    function sync() external;
}

interface IUniswapV2Router01 {
    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
        );
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountETH);

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

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

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


contract FES is Context, IERC20, IERC20Metadata, Ownable {
    
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;
    string private _name;
    string private _symbol;


    bool private inSwap;

    uint256 internal _FeeCollected;
    
    uint256 public minTokensBeforeSwap;
    
    IUniswapV2Router02 public router;
    address public pair;

    uint public _feeDecimal = 2;
    // index 0 = buy fee, index 1 = sell fee, index 2 = p2p fee
    uint[] public _Fee;

    address public fee_wallet;

    bool public swapEnabled = true;
    bool public isFeeActive = true;
    mapping(address => bool) public isTaxless;
    event Swap(uint swaped);


    event DelegateVotesChanged(
    address indexed delegate, 
    uint previousBalance, 
    uint newBalance
    );

    event DelegateChanged(
    address indexed delegator, 
    address indexed fromDelegate, 
    address indexed toDelegate
    );

    constructor(address _fee_wallet) {
        

        string memory e_name = "Flat Earth Society";
        string memory e_symbol = "FES";
        uint e_totalSupply = 69_000_000_000 ether;
        minTokensBeforeSwap = 10 ether ;   

        fee_wallet = _fee_wallet;

        _name = e_name;
        _symbol = e_symbol;

        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
     

        router = _uniswapV2Router;

        _Fee.push(100); // Buy  fee is  4.00%
        _Fee.push(100); // Sell fee is  4.00%
        _Fee.push(100); // P2P  fee is  4.00%

        isTaxless[msg.sender] = true;
        isTaxless[address(this)] = true;
        isTaxless[fee_wallet] = true;
        isTaxless[address(0)] = true;

        _mint(msg.sender, e_totalSupply);

    }

 
    function name() public view virtual override returns (string memory) {
        return _name;
    }

  
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

 
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

  
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

 
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

 
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }

    
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

   
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, _allowances[owner][spender] + addedValue);
        return true;
    }

 
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = _allowances[owner][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

    
    
        if (swapEnabled && !inSwap && from != pair ) {
           swap();
        }

        uint256 feesCollected;
        if ((isFeeActive) && !isTaxless[from] && !isTaxless[to] && !inSwap) {
            bool sell = to == pair;
            bool p2p = from != pair && to != pair;
            feesCollected = calculateFee(p2p ? 2 : sell ? 1 : 0, amount);
        }

        amount -= feesCollected;
        _balances[from] -= feesCollected;
        _balances[address(this)] += feesCollected;

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
        }
        _balances[to] += amount;

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

  
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        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 _spendAllowance(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

  
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}


 modifier lockTheSwap() {
        inSwap = true;
        _;
        inSwap = false;
    }

    function sendViaCall(address payable _to, uint amount) private {
        (bool sent, bytes memory data) = _to.call{value: amount}("");
        data;
        require(sent, "Failed to send Ether");
    }

    function swap() private  lockTheSwap {
        
        uint swapAmount = balanceOf(address(this));
        if(minTokensBeforeSwap > swapAmount) return;
        
        address[] memory sellPath = new address[](2);
        sellPath[0] = address(this);
        sellPath[1] = router.WETH();       


        _approve(address(this), address(router), swapAmount);
        router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            swapAmount,
            0,
            sellPath,
            address(this),
            block.timestamp
        );

    
        // Send to Fee Wallet
        if(address(this).balance > 0) sendViaCall(payable(fee_wallet), address(this).balance);
        emit Swap(swapAmount);
       
    }

     function calculateFee(uint256 feeIndex, uint256 amount) internal view returns(uint256) {
        uint256 fee = (amount * _Fee[feeIndex]) / (10**(_feeDecimal + 2));
        return fee;
    }

    function setMinTokensBeforeSwap(uint256 amount) external onlyOwner {
        minTokensBeforeSwap = amount;
    }

    function setFeeWallet(address wallet)  external onlyOwner {
        fee_wallet = wallet;
    }

    function setFees(uint256 buy, uint256 sell, uint256 p2p) external onlyOwner {
        _Fee[0] = buy;
        _Fee[1] = sell;
        _Fee[2] = p2p;
    }

    function setSwapEnabled(bool enabled) external onlyOwner {
        swapEnabled = enabled;
    }

    function setFeeActive(bool value) external onlyOwner {
        isFeeActive = value;
    }

    function setTaxless(address account, bool value) external onlyOwner {
        isTaxless[account] = value;
    }

    fallback() external payable {}
    receive() external payable {}
}
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