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



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

pragma solidity ^0.8.0;

import "../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.
 *
 * By default, the owner account will be the one that deploys the contract. 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;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @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 {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @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 {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _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/utils/Context.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @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;
    }
}

// File: contracts/JuicePreSale.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

import "./libraries/TransferHelper.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract JuicePreSale is Ownable {
    address public immutable USDT_ADDRESS;
    address public immutable USDC_ADDRESS;
    address public treasury;
    bool public onSale;

    mapping(address => uint256) public usdtInvestments;
    mapping(address => uint256) public usdcInvestments;

    event Invest(address indexed investor, address indexed token, uint256 amount);
    event ChangeSaleStatus(bool status);
    event SetTreasury(address treasury);
    event Withdraw(address token, uint256 amount);

    constructor(address _USDT_ADDRESS, address _USDC_ADDRESS) {
        USDT_ADDRESS = _USDT_ADDRESS;
        USDC_ADDRESS = _USDC_ADDRESS;
    }

    modifier onlyWhenOnSale() {
        require(onSale, "Sale is not active now");
        _;
    }

    function changeSaleStatus() external onlyOwner {
        onSale = !onSale;

        emit ChangeSaleStatus(onSale);
    }

    function setTreasury(address _treasury) external onlyOwner {
        treasury = _treasury;

        emit SetTreasury(_treasury);
    }

    function investUSDT(uint256 amount) external onlyWhenOnSale {
        address sender = msg.sender;
        if (treasury != address(0)) {
            TransferHelper.safeTransferFrom(USDT_ADDRESS, sender, treasury, amount);
        } else {
            TransferHelper.safeTransferFrom(USDT_ADDRESS, sender, address(this), amount);
        }

        usdtInvestments[sender] += amount;

        emit Invest(sender, USDT_ADDRESS, amount);
    }

    function investUSDC(uint256 amount) external onlyWhenOnSale {
        address sender = msg.sender;
        if (treasury != address(0)) {
            TransferHelper.safeTransferFrom(USDC_ADDRESS, sender, treasury, amount);
        } else {
            TransferHelper.safeTransferFrom(USDC_ADDRESS, sender, address(this), amount);
        }

        usdcInvestments[sender] += amount;

        emit Invest(sender, USDC_ADDRESS, amount);
    }

    function withdraw(address token, uint256 amount) external onlyOwner {
        TransferHelper.safeTransfer(token, msg.sender, amount);

        emit Withdraw(token, amount);
    }
}

// File: contracts/libraries/TransferHelper.sol



// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity 0.8.10;

// from uniswap SDK
// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
    function safeApprove(
        address token,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('approve(address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper::safeApprove: approve failed");
    }

    function safeTransfer(
        address token,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('transfer(address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper::safeTransfer: transfer failed");
    }

    function safeTransferFrom(
        address token,
        address from,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper::transferFrom: transferFrom failed");
    }

    function safeTransferETH(address to, uint256 value) internal {
        (bool success, ) = to.call{value: value}(new bytes(0));
        require(success, "TransferHelper::safeTransferETH: ETH transfer failed");
    }
}