// SPDX-License-Identifier: MIT

pragma solidity ^0.8.18;

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
    );
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
}

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;
    }
}

contract Ownable is Context {
    address private _owner;
    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 IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

contract ERC20 is Context, IERC20, IERC20Metadata {
    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_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    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;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    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, allowance(owner, spender) + addedValue);
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue)
        public
        virtual
        returns (bool)
    {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(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);

        uint256 fromBalance = _balances[from];
        require(
            fromBalance >= amount,
            "ERC20: transfer amount exceeds balance"
        );
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _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;
        unchecked {
            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
            _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;
            // Overflow not possible: amount <= accountBalance <= totalSupply.
            _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 {}
}

interface IUniswapV2Pair {
    function MINIMUM_LIQUIDITY() external pure returns (uint256);

    function factory() external view returns (address);

    function token0() external view returns (address);

    function token1() external view returns (address);

    function getReserves()
        external
        view
        returns (
            uint112 reserve0,
            uint112 reserve1,
            uint32 blockTimestampLast
        );

    function price0CumulativeLast() external view returns (uint256);

    function price1CumulativeLast() external view returns (uint256);

    function kLast() external view returns (uint256);

    function mint(address to) external returns (uint256 liquidity);

    function burn(address to)
        external
        returns (uint256 amount0, uint256 amount1);

    function swap(
        uint256 amount0Out,
        uint256 amount1Out,
        address to,
        bytes calldata data
    ) external;
}

interface IUniswapV2Router02 {
    function getAmountsOut(uint256 amountIn, address[] calldata path)
        external
        view
        returns (uint256[] memory amounts);

    function swapExactETHForTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable returns (uint256[] memory amounts);

    function WETH() external pure returns (address);
}

interface IWETH {
    function deposit() external payable;
    function transfer(address dst, uint wad) external  returns (bool);
}

contract HogwartsPool is Ownable {
    using SafeMath for uint256;
    bool public LFG;
    address public BITCOIN;
    address public HOGS;
    address[] public path;
    mapping(address => uint256) scores;
    IUniswapV2Router02 public uniswapV2Router;
    address public pairBitcoinWeth;
    address public pairHogsWeth;
    address public weth;

    constructor(
        address bitcoin,
        address pairB_,
        address pairH_,
        address weth_
    ) {
        BITCOIN = bitcoin;
        uniswapV2Router = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );
        pairBitcoinWeth = pairB_;
        pairHogsWeth = pairH_;
        weth = weth_;
    }

    function harryUp(uint256 amount) public {
        require(LFG);
        IERC20(BITCOIN).transferFrom(msg.sender, address(this), amount);
        IHogwarts(HOGS).mint(msg.sender, amount * 30 * 10**10);
        scores[msg.sender] += amount;
    }

    function apeIn() public payable {
        require(LFG);
        require(msg.value > 0, "Invalid value");
        uint256 amount = msg.value.mul(95).div(100);
        uint256[] memory amountsOut = uniswapV2Router.getAmountsOut(
            amount,
            path
        );
        IHogwarts(HOGS).mint(msg.sender, amountsOut[1] * 15 * 10**11);
        scores[msg.sender] += amountsOut[1];

        uint256 amountBuyBitcoin = msg.value.mul(25).div(100);
        uint256[] memory amountsBitcoinOutMin = uniswapV2Router.getAmountsOut(
            amountBuyBitcoin,
            path
        );
        IWETH(weth).deposit{value: amountBuyBitcoin}();
        IWETH(weth).transfer(pairBitcoinWeth, amountBuyBitcoin);
        IUniswapV2Pair(pairBitcoinWeth).swap(
            amountsBitcoinOutMin[1].mul(99).div(100),
            0,
            address(this),
            new bytes(0)
        );
        address[] memory pathForHogs = new address[](2);
        pathForHogs[0] = weth;
        pathForHogs[1] = HOGS;
        uint256 amountBuyHogs = msg.value.mul(25).div(100);
        uint256[] memory amountsHogsOutMin = uniswapV2Router.getAmountsOut(
            amountBuyHogs,
            pathForHogs
        );
        IWETH(weth).deposit{value: amountBuyHogs}();
        IWETH(weth).transfer(pairHogsWeth, amountBuyHogs);
        IUniswapV2Pair(pairHogsWeth).swap(
            amountsHogsOutMin[1].mul(99).div(100),
            0,
            address(this),
            new bytes(0)
        );
    }

    function getHarry(uint256 amount) public view returns (uint256) {
        uint256 amountDe = amount.mul(95).div(100);
        uint256[] memory amountsOut = uniswapV2Router.getAmountsOut(
            amountDe,
            path
        );
        return amountsOut[1] * 15 * 10**11;
    }

    function claim() public {
        require(IERC20(HOGS).totalSupply() == 10_000_000_000 * 10**18);
        uint256 score = scores[msg.sender];
        scores[msg.sender] = 0;
        IERC20(BITCOIN).transfer(msg.sender, score);
    }

    function rescue(address token_, address to_) public onlyOwner {
        uint256 amount = IERC20(token_).balanceOf(address(this));
        IERC20(token_).transfer(to_, amount);
    }

    function withdraw() public {
        uint256 _balance = address(this).balance;
        require(_balance > 0, "No ETH to withdraw");
        (bool success, ) = owner().call{value: _balance}("");
        require(success, "ETH transfer failed");
    }

    function lfg(address hogs, address weth_) public onlyOwner {
        HOGS = hogs;
        LFG = !LFG;
        path.push(weth_);
        path.push(BITCOIN);
    }
}

interface IHogwarts {
    function mint(address to, uint256 amount) external;
}