// File: @openzeppelin/contracts/token/ERC20/IERC20.sol


// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @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 amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` 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 amount) 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 `amount` 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 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` 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 amount
    ) external returns (bool);
}

// File: @openzeppelin/contracts/security/ReentrancyGuard.sol


// OpenZeppelin Contracts (last updated v4.8.0) (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;
    }
}

// File: @openzeppelin/contracts/utils/math/SafeMath.sol


// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// File: @openzeppelin/contracts/utils/Context.sol


// 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: @openzeppelin/contracts/access/Ownable.sol


// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;


/**
 * @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 anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing 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: contracts/KennelLocker.sol


pragma solidity >=0.7.0;





contract Kennel is Ownable, ReentrancyGuard {
    using SafeMath for uint256;

    struct Items {
        address tokenAddress;
        address withdrawalAddress;
        uint256 tokenAmount;
        uint256 withdrawn;
        uint256 unlockTime;
    }

    uint256 public ethFee = 0.00 ether;
    // base 1000, 0.5% = value * 5 / 1000
    uint256 public lpFeePercent = 0;
    address payable public feeWithdrawalAddress;

    // for statistic
    uint256 public totalEthFees = 0;

    uint256 public depositId;
    uint256[] public allDepositIds;

    mapping(uint256 => Items) public lockedToken;

    mapping(address => uint256[]) public depositsByWithdrawalAddress;
    mapping(address => uint256[]) public depositsByTokenAddress;

    // Token -> { sender1: locked amount, ... }
    mapping(address => mapping(address => uint256)) public walletTokenBalance;

    event Log(string message);
    event LogBytes(bytes data);
    event TokensLocked(address indexed tokenAddress, address indexed sender, uint256 amount, uint256 unlockTime, uint256 depositId);
    event TokensWithdrawn(address indexed tokenAddress, address indexed receiver, uint256 amount);
    event TransferLockOwnership(uint256 depositId, address indexed sender, address indexed receiver, uint256 amount);

    constructor () {
        feeWithdrawalAddress = payable(msg.sender);
    }

    function lockTokens(
        address _tokenAddress,
        uint256 _amount,
        uint256 _unlockTime,
        bool _feeInEth
    ) external payable returns (uint256 _id) {
        require(_amount > 0, 'Tokens amount must be greater than 0');
        require(_unlockTime < 10000000000, 'Unix timestamp must be in seconds, not milliseconds');
        require(_unlockTime > block.timestamp, 'Unlock time must be in future');
        require((_feeInEth && msg.value >= ethFee) || !_feeInEth, 'ETH fee not provided');

        require(IERC20(_tokenAddress).approve(address(this), _amount), 'Failed to approve tokens');
        require(IERC20(_tokenAddress).transferFrom(msg.sender, address(this), _amount), 'Failed to transfer tokens to locker');

        uint256 lockAmount = _amount;
        if (_feeInEth) {
            totalEthFees = totalEthFees.add(msg.value);
        } else {
            uint256 fee = lockAmount.mul(lpFeePercent).div(1000);
            lockAmount = lockAmount.sub(fee);
            try IERC20(_tokenAddress).transfer(feeWithdrawalAddress, fee) {
                emit Log(string(abi.encodePacked("Token[", _tokenAddress, "]: fee of ", fee, " is sent to ", feeWithdrawalAddress)));
            } catch Error(string memory reason) {
                emit Log(reason);
                revert("An error occur while send fees. Try paying fee with ETH");
            } catch (bytes memory reason) {
                emit LogBytes(reason);
                revert("An error occur while send fees. Try paying fee with ETH");
            }
        }

        walletTokenBalance[_tokenAddress][msg.sender] = walletTokenBalance[_tokenAddress][msg.sender].add(_amount);

        address _withdrawalAddress = msg.sender;
        _id = ++depositId;
        lockedToken[_id].tokenAddress = _tokenAddress;
        lockedToken[_id].withdrawalAddress = _withdrawalAddress;
        lockedToken[_id].tokenAmount = lockAmount;
        lockedToken[_id].withdrawn = 0;
        lockedToken[_id].unlockTime = _unlockTime;

        allDepositIds.push(_id);
        depositsByWithdrawalAddress[_withdrawalAddress].push(_id);
        depositsByTokenAddress[_tokenAddress].push(_id);

        emit TokensLocked(_tokenAddress, msg.sender, _amount, _unlockTime, depositId);
    }

    function withdrawTokens(uint256 _id, uint256 _amount) external {
        require(block.timestamp >= lockedToken[_id].unlockTime, 'Tokens are locked');
        require(msg.sender == lockedToken[_id].withdrawalAddress, 'Can withdraw from the address used for locking');
        require(lockedToken[_id].tokenAmount > lockedToken[_id].withdrawn, 'Tokens already withdrawn');

        address tokenAddress = lockedToken[_id].tokenAddress;
        address withdrawalAddress = lockedToken[_id].withdrawalAddress;
        uint256 balance = walletTokenBalance[tokenAddress][msg.sender];

        require(balance >= _amount, 'Insufficient funds');
        require(IERC20(tokenAddress).transfer(withdrawalAddress, _amount), 'Failed to transfer tokens');

        uint256 withdrawn = lockedToken[_id].withdrawn;
        lockedToken[_id].withdrawn = withdrawn.add(_amount);
        walletTokenBalance[tokenAddress][msg.sender] = balance.sub(_amount);

        if (lockedToken[_id].withdrawn >= lockedToken[_id].tokenAmount) {
            // Remove depositId from withdrawal addresses mapping
            uint256 i;
            uint256 j;
            uint256 byWLength = depositsByWithdrawalAddress[withdrawalAddress].length;
            uint256[] memory newDepositsByWithdrawal = new uint256[](byWLength - 1);

            for (j = 0; j < byWLength; j++) {
                if (depositsByWithdrawalAddress[withdrawalAddress][j] == _id) {
                    for (i = j; i < byWLength - 1; i++) {
                        newDepositsByWithdrawal[i] = depositsByWithdrawalAddress[withdrawalAddress][i + 1];
                    }
                    break;
                } else {
                    newDepositsByWithdrawal[j] = depositsByWithdrawalAddress[withdrawalAddress][j];
                }
            }
            depositsByWithdrawalAddress[withdrawalAddress] = newDepositsByWithdrawal;

            // Remove depositId from tokens mapping
            uint256 byTLength = depositsByTokenAddress[tokenAddress].length;
            uint256[] memory newDepositsByToken = new uint256[](byTLength - 1);
            for (j = 0; j < byTLength; j++) {
                if (depositsByTokenAddress[tokenAddress][j] == _id) {
                    for (i = j; i < byTLength - 1; i++) {
                        newDepositsByToken[i] = depositsByTokenAddress[tokenAddress][i + 1];
                    }
                    break;
                } else {
                    newDepositsByToken[j] = depositsByTokenAddress[tokenAddress][j];
                }
            }
            depositsByTokenAddress[tokenAddress] = newDepositsByToken;
        }

        emit TokensWithdrawn(tokenAddress, withdrawalAddress, _amount);
    }

    function transferLockOwnership(uint256 _id, address _newWithdrawalAddress) external {
        address withdrawalAddress = lockedToken[_id].withdrawalAddress;
        require(msg.sender == withdrawalAddress, 'You are not the lock owner');
        require(msg.sender != _newWithdrawalAddress, 'You can not transfer lock to yourself');

        uint256 i;
        uint256 j;
        uint256 byWLength = depositsByWithdrawalAddress[withdrawalAddress].length;
        uint256[] memory newDepositsByWithdrawal = new uint256[](byWLength - 1);
        address tokenAddress = lockedToken[_id].tokenAddress;
        uint256 balance = walletTokenBalance[tokenAddress][msg.sender];
        walletTokenBalance[tokenAddress][msg.sender] = balance.sub(balance);

        for (j = 0; j < byWLength; j++) {
            if (depositsByWithdrawalAddress[withdrawalAddress][j] == _id) {
                for (i = j; i < byWLength - 1; i++) {
                    newDepositsByWithdrawal[i] = depositsByWithdrawalAddress[withdrawalAddress][i + 1];
                }
                break;
            } else {
                newDepositsByWithdrawal[j] = depositsByWithdrawalAddress[withdrawalAddress][j];
            }
        }

        walletTokenBalance[tokenAddress][_newWithdrawalAddress] = walletTokenBalance[tokenAddress][_newWithdrawalAddress].add(balance);
        depositsByWithdrawalAddress[withdrawalAddress] = newDepositsByWithdrawal;
        lockedToken[_id].withdrawalAddress = _newWithdrawalAddress;
        depositsByWithdrawalAddress[_newWithdrawalAddress].push(_id);

        emit TransferLockOwnership(_id, msg.sender, withdrawalAddress, balance);
    }

    function getTotalTokenBalance(address _tokenAddress) view public returns (uint256) {
        return IERC20(_tokenAddress).balanceOf(address(this));
    }

    function getTokenBalanceByAddress(address _tokenAddress, address _walletAddress) view public returns (uint256) {
        return walletTokenBalance[_tokenAddress][_walletAddress];
    }

    function getAllDepositIds() view public returns (uint256[] memory) {
        return allDepositIds;
    }

    function getDepositDetails(uint256 _id) view public returns (address, address, uint256, uint256, uint256) {
        return (lockedToken[_id].tokenAddress, lockedToken[_id].withdrawalAddress, lockedToken[_id].tokenAmount, lockedToken[_id].withdrawn, lockedToken[_id].unlockTime);
    }

    function getDepositsByWithdrawalAddress(address _withdrawalAddress) view public returns (uint256[] memory) {
        return depositsByWithdrawalAddress[_withdrawalAddress];
    }

    function getDepositsByTokenAddress(address _tokenAddress) view public returns (uint256[] memory) {
        return depositsByTokenAddress[_tokenAddress];
    }

    function setFeeWithdrawalAddress(address payable _address) external onlyOwner {
        require(_address != address(0), 'Address can not be dead address');
        feeWithdrawalAddress = _address;
    }

    function setEthFee(uint256 fee) external onlyOwner {
        require(fee > 0, 'Fee is too small');
        ethFee = fee;
    }

    function setLpFee(uint256 percent) external onlyOwner {
        require(percent > 0, 'Percent is too small');
        lpFeePercent = percent;
    }

    function withdrawFees() external onlyOwner {
        require(address(this).balance > 0, 'Insufficient funds');
        feeWithdrawalAddress.transfer(address(this).balance);
    }
}