// File: LateSale.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/Pausable.sol";

interface Aggregator {
    function latestRoundData() external view returns (
        uint80 roundId,
        int256 answer,
        uint256 startedAt,
        uint256 updatedAt,
        uint80 answeredInRound
    );
}

interface IRouter {
  function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);

  function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);

  function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);

  function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}

contract LateSale_Deelance is Ownable(msg.sender), ReentrancyGuard, Pausable {
    uint256 public totalTokensSold;
    uint256 public baseDecimals;
    uint256 public maxTokensToBuy;
    uint256 public usdRaised;
    address public paymentWallet;
    uint256 public percent = 5;
    Aggregator public aggregatorInterface;
    IERC20 public saleToken;
    IERC20 public USDTInterface;
    uint256 public maxTokensToSell;
    IRouter public router;
    uint256 public bonusThreshold = 50 * 10**18; // Initially set to $50
    uint256 public bonusTokenAmount = 5000 * 10**18; // Initially set to 5000 tokens



        address dataOracle = 0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419; 
        address dAddress = 0x077C72ECEc1c4EC5D0A2f0CfF278007F4Db3BED7;
        address routerAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D; 
        address USDTtoken = 0xdAC17F958D2ee523a2206206994597C13D831ec7;


    event TokensBought(
        address indexed user,
        uint256 indexed tokensBought,
        address indexed purchaseToken,
        uint256 amountPaid,
        uint256 usdEq,
        uint256 timestamp
    );
    event MaxTokensUpdated(
        uint256 prevValue,
        uint256 newValue,
        uint256 timestamp
    );

    constructor()  {
        USDTInterface = IERC20(USDTtoken);
        paymentWallet = dAddress;
        baseDecimals = 1000000000000000000;
        router = IRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
    }

    /**
     * @dev To pause the presale
     */
    function pause() external onlyOwner {
        _pause();
    }

    /**
     * @dev To unpause the presale
     */
    function unpause() external onlyOwner {
        _unpause();
    }

    /**
     * @dev To get latest ETH price in 10**18 format
     */
    function getLatestPrice() public view returns (uint256) {
       (, int256 price, , , ) = Aggregator(dataOracle).latestRoundData();
        price = (price * (10**10));
       return uint256(price);
    }


      function setRouter(address _router) external onlyOwner {
    router = IRouter(_router);
     }


    modifier checkSaleState(uint256 amount) {
        require(amount > 0, "Invalid sale amount");
        require(amount <= maxTokensToBuy, "Amount exceeds max tokens to buy");
        require(
            (amount * baseDecimals) <= saleToken.balanceOf(address(this)),
            "Amount exceeds tokens remaining for sale"
        );
        _;
    }


  function sendValue(address payable recipient, uint256 amount) internal {
    require(address(this).balance >= amount, 'Low balance');
    (bool success, ) = recipient.call{value: amount}('');
    require(success, 'ETH Payment failed');
  }


function buyWithEth(uint256 amount) external payable checkSaleState(amount) whenNotPaused nonReentrant returns (bool) {
    uint256 ethAmount = fetchPrice(amount * baseDecimals);
    require(msg.value >= ethAmount, 'Less payment');
    uint256 excess = msg.value - ethAmount;
    sendValue(payable(paymentWallet), ethAmount);
    if (excess > 0) sendValue(payable(_msgSender()), excess);
    bool success = IERC20(saleToken).transfer(_msgSender(), (amount * baseDecimals));
    require(success, 'Token transfer failed');
    
    uint256 usdValue = (ethAmount * getLatestPrice()) / baseDecimals;
    if (usdValue >= bonusThreshold) {
        require(saleToken.transfer(_msgSender(), bonusTokenAmount), "Bonus token transfer failed");
    }

    emit TokensBought(_msgSender(), amount, address(0), ethAmount, usdValue, block.timestamp);
    return true;
}

function buyWithUSDT(uint256 amount) external checkSaleState(amount) whenNotPaused returns (bool) {
    uint256 ethAmount = fetchPrice(amount * baseDecimals);
    uint256 usdPrice = (ethAmount * getLatestPrice()) / baseDecimals;
    uint256 usdAmount = usdPrice / (10 ** 12); // Convert to USDT decimals if necessary
    (bool success, ) = address(USDTInterface).call(abi.encodeWithSignature('transferFrom(address,address,uint256)', _msgSender(), paymentWallet, usdAmount));
    require(success, 'Token payment failed');
    bool tokenTransferSuccess = IERC20(saleToken).transfer(_msgSender(), (amount * baseDecimals));
    require(tokenTransferSuccess, 'Token transfer failed');

    if (usdPrice >= bonusThreshold) {
        require(saleToken.transfer(_msgSender(), bonusTokenAmount), "Bonus token transfer failed");
    }

    emit TokensBought(_msgSender(), amount, address(USDTInterface), usdAmount, usdPrice, block.timestamp);
    return true;
}

    function fetchPrice(uint256 amountOut) public view returns (uint256) {
    address[] memory path = new address[](2);
    path[0] = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
    path[1] = 0x7D60dE2E7D92Cb5C863bC82f8d59b37C59fC0A7A;
    uint256[] memory amounts = router.getAmountsIn(amountOut, path);
    return amounts[0] + ((amounts[0] * percent) / 100);
  }

    function setMaxTokensToBuy(uint256 _maxTokensToBuy) external onlyOwner {
        require(_maxTokensToBuy > 0, "Zero max tokens to buy value");
        uint256 prevValue = maxTokensToBuy;
        maxTokensToBuy = _maxTokensToBuy;
        emit MaxTokensUpdated(prevValue, _maxTokensToBuy, block.timestamp);
    }

    function setPaymentWallet(address _newPaymentWallet) external onlyOwner {
        require(_newPaymentWallet != address(0), "address cannot be zero");
        paymentWallet = _newPaymentWallet;
    }


    function setDecimals(uint256  _decimals) external onlyOwner {
    baseDecimals = _decimals;
    }

    function setSaleTokenAddress(address _saleTokenAddress) external onlyOwner {
        require(_saleTokenAddress != address(0), "Invalid address");
        saleToken = IERC20(_saleTokenAddress);
    }

   function withdrawTokens(address token, uint256 amount) external onlyOwner   {
        IERC20(token).transfer(owner(), amount);
    }

    function withdrawETHs() external onlyOwner  {
        (bool success, ) = payable(owner()).call{value: address(this).balance}("");
        require(success, "Failed to withdraw");
    } 

    function setBonusThreshold(uint256 _newBonusThreshold) external onlyOwner {
        require(_newBonusThreshold > 0, "Bonus threshold must be greater than 0");
        bonusThreshold = _newBonusThreshold;
    }

    function setBonusTokenAmount(uint256 _newBonusTokenAmount) external onlyOwner {
        require(_newBonusTokenAmount > 0, "Bonus token amount must be greater than 0");
        bonusTokenAmount = _newBonusTokenAmount;
    }

}
// File: @openzeppelin/contracts/security/Pausable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        require(paused(), "Pausable: not paused");
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity 0.8.19;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * The initial owner is set to the address provided by the deployer. This can
 * later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// File: @openzeppelin/contracts/security/ReentrancyGuard.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity 0.8.19;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 value) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

// File: @openzeppelin/contracts/utils/Context.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Context.sol)

pragma solidity 0.8.19;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}