// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma abicoder v2;

interface IERC20 {
    /**
     * @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);

    /**
     * @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);
}

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);
}

library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

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 Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        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);
    }
}

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() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

library SafeERC20 {
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
    unchecked {
        uint256 oldAllowance = token.allowance(address(this), spender);
        require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
        uint256 newAllowance = oldAllowance - value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

interface IPancakeProfile {
    function createProfile(
        uint256 _teamId,
        address _nftAddress,
        uint256 _tokenId
    ) external;

    function increaseUserPoints(
        address _userAddress,
        uint256 _numberPoints,
        uint256 _campaignId
    ) external;

    function removeUserPoints(address _userAddress, uint256 _numberPoints) external;

    function addNftAddress(address _nftAddress) external;

    function addTeam(string calldata _teamName, string calldata _teamDescription) external;

    function getUserProfile(address _userAddress)
    external
    view
    returns (
        uint256,
        uint256,
        uint256,
        address,
        uint256,
        bool
    );

    function getUserStatus(address _userAddress) external view returns (bool);

    function getTeamProfile(uint256 _teamId)
    external
    view
    returns (
        string memory,
        string memory,
        uint256,
        uint256,
        bool
    );
}

contract SmartChefInitializable is Ownable, ReentrancyGuard {
    using SafeERC20 for IERC20Metadata;

    // The address of the smart chef factory
    address public immutable SMART_CHEF_FACTORY;

    // Whether a limit is set for users
    bool public userLimit;

    // Whether it is initialized
    bool public isInitialized;

    // Accrued token per share
    uint256 public accTokenPerShare;

    // The block timestamp when CAKE mining ends
    uint256 public endTimestamp;

    // The block timestamp when CAKE mining starts
    uint256 public startTimestamp;

    // The block timestamp of the last pool update
    uint256 public lastRewardTimestamp;

    // The pool limit (0 if none)
    uint256 public poolLimitPerUser;

    // Seconds available for user limit (after start timestamp)
    uint256 public numberSecondsForUserLimit;

    // Pancake profile address
    address public immutable pancakeProfile;

    // Pancake Profile is requested
    bool public pancakeProfileIsRequested;

    // Pancake Profile points threshold
    uint256 public pancakeProfileThresholdPoints;

    // CAKE tokens created per second
    uint256 public rewardPerSecond;

    // The precision factor
    uint256 public PRECISION_FACTOR;

    // The reward token
    IERC20Metadata public rewardToken;

    // The staked token
    IERC20Metadata public stakedToken;

    // Info of each user that stakes tokens (stakedToken)
    mapping(address => UserInfo) public userInfo;

    struct UserInfo {
        uint256 amount; // How many staked tokens the user has provided
        uint256 rewardDebt;
    }

    event Deposit(address indexed user, uint256 amount);
    event EmergencyWithdraw(address indexed user, uint256 amount);
    event NewStartAndEndTimestamp(uint256 startTimestamp, uint256 endTimestamp);
    event NewRewardPerSecond(uint256 rewardPerSecond);
    event NewPoolLimit(uint256 poolLimitPerUser);
    event RewardsStop(uint256 blockNumber);
    event TokenRecovery(address indexed token, uint256 amount);
    event Withdraw(address indexed user, uint256 amount);
    event UpdateProfileAndThresholdPointsRequirement(bool isProfileRequested, uint256 thresholdPoints);

    /**
     * @notice Constructor
     * @param _pancakeProfile: Pancake Profile address
     * @param _pancakeProfileIsRequested: Pancake Profile is requested
     * @param _pancakeProfileThresholdPoints: Pancake Profile need threshold points
     */
    constructor(
        address _pancakeProfile,
        bool _pancakeProfileIsRequested,
        uint256 _pancakeProfileThresholdPoints
    ) {
        SMART_CHEF_FACTORY = msg.sender;

        pancakeProfile = _pancakeProfile; // It can be empty on Other chain

        if (_pancakeProfile != address(0)) {
            IPancakeProfile(_pancakeProfile).getTeamProfile(1);

            // if pancakeProfile is requested
            pancakeProfileIsRequested = _pancakeProfileIsRequested;

            // pancakeProfile threshold points when profile & points are requested
            pancakeProfileThresholdPoints = _pancakeProfileThresholdPoints;
        } else {
            pancakeProfileIsRequested = false;
            pancakeProfileThresholdPoints = 0;
        }
    }

    /*
     * @notice Initialize the contract
     * @param _stakedToken: staked token address
     * @param _rewardToken: reward token address
     * @param _rewardPerSecond: reward per second (in rewardToken)
     * @param _startTimestamp: start block timestamp
     * @param _endTimestamp: end block timestamp
     * @param _poolLimitPerUser: pool limit per user in stakedToken (if any, else 0)
     * @param _numberSecondsForUserLimit: seconds available for user limit (after start timestamp)
     * @param _admin: admin address with ownership
     */
    function initialize(
        IERC20Metadata _stakedToken,
        IERC20Metadata _rewardToken,
        uint256 _rewardPerSecond,
        uint256 _startTimestamp,
        uint256 _endTimestamp,
        uint256 _poolLimitPerUser,
        uint256 _numberSecondsForUserLimit,
        address _admin
    ) external {
        require(!isInitialized, "Already initialized");
        require(msg.sender == SMART_CHEF_FACTORY, "Not factory");
        require(_startTimestamp < _endTimestamp, "New startTimestamp must be lower than new endTimestamp");
        require(block.timestamp < _startTimestamp, "New startTimestamp must be higher than current block timestamp");

        // Make this contract initialized
        isInitialized = true;

        stakedToken = _stakedToken;
        rewardToken = _rewardToken;
        rewardPerSecond = _rewardPerSecond;
        startTimestamp = _startTimestamp;
        endTimestamp = _endTimestamp;

        if (_poolLimitPerUser > 0) {
            userLimit = true;
            poolLimitPerUser = _poolLimitPerUser;
            numberSecondsForUserLimit = _numberSecondsForUserLimit;
        }

        uint256 decimalsRewardToken = uint256(rewardToken.decimals());
        require(decimalsRewardToken < 36, "Must be inferior to 36");

        PRECISION_FACTOR = uint256(10**(uint256(36) - decimalsRewardToken));
        require(PRECISION_FACTOR * rewardPerSecond / (10**decimalsRewardToken) >= 100_000_000, "rewardPerSecond must be larger");

        // Set the lastRewardBlock as the startTimestamp
        lastRewardTimestamp = startTimestamp;

        // Transfer ownership to the admin address who becomes owner of the contract
        transferOwnership(_admin);
    }

    /*
     * @notice Deposit staked tokens and collect reward tokens (if any)
     * @param _amount: amount to withdraw (in rewardToken)
     */
    function deposit(uint256 _amount) external nonReentrant {
        UserInfo storage user = userInfo[msg.sender];

        if (pancakeProfile != address(0)) {
            // Checks whether the user has an active profile
            require(
                (!pancakeProfileIsRequested && pancakeProfileThresholdPoints == 0) ||
                IPancakeProfile(pancakeProfile).getUserStatus(msg.sender),
                "Deposit: Must have an active profile"
            );

            uint256 numberUserPoints = 0;

            if (pancakeProfileThresholdPoints > 0) {
                require(pancakeProfile != address(0), "Deposit: PancakeProfile is not exist");
                (, numberUserPoints, , , , ) = IPancakeProfile(pancakeProfile).getUserProfile(msg.sender);
            }

            require(
                pancakeProfileThresholdPoints == 0 || numberUserPoints >= pancakeProfileThresholdPoints,
                "Deposit: User is not get enough user points"
            );
        }

        userLimit = hasUserLimit();

        require(!userLimit || ((_amount + user.amount) <= poolLimitPerUser), "Deposit: Amount above limit");

        _updatePool();

        if (user.amount > 0) {
            uint256 pending = (user.amount * accTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;
            if (pending > 0) {
                rewardToken.safeTransfer(address(msg.sender), pending);
            }
        }

        if (_amount > 0) {
            user.amount = user.amount + _amount;
            stakedToken.safeTransferFrom(address(msg.sender), address(this), _amount);
        }

        user.rewardDebt = (user.amount * accTokenPerShare) / PRECISION_FACTOR;

        emit Deposit(msg.sender, _amount);
    }

    /*
     * @notice Withdraw staked tokens and collect reward tokens
     * @param _amount: amount to withdraw (in rewardToken)
     */
    function withdraw(uint256 _amount) external nonReentrant {
        UserInfo storage user = userInfo[msg.sender];
        require(user.amount >= _amount, "Amount to withdraw too high");

        _updatePool();

        uint256 pending = (user.amount * accTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;

        if (_amount > 0) {
            user.amount = user.amount - _amount;
            stakedToken.safeTransfer(address(msg.sender), _amount);
        }

        if (pending > 0) {
            rewardToken.safeTransfer(address(msg.sender), pending);
        }

        user.rewardDebt = (user.amount * accTokenPerShare) / PRECISION_FACTOR;

        emit Withdraw(msg.sender, _amount);
    }

    /*
     * @notice Withdraw staked tokens without caring about rewards rewards
     * @dev Needs to be for emergency.
     */
    function emergencyWithdraw() external nonReentrant {
        UserInfo storage user = userInfo[msg.sender];
        uint256 amountToTransfer = user.amount;
        user.amount = 0;
        user.rewardDebt = 0;

        if (amountToTransfer > 0) {
            stakedToken.safeTransfer(address(msg.sender), amountToTransfer);
        }

        emit EmergencyWithdraw(msg.sender, user.amount);
    }

    /*
     * @notice Stop rewards
     * @dev Only callable by owner. Needs to be for emergency.
     */
    function emergencyRewardWithdraw(uint256 _amount) external onlyOwner {
        rewardToken.safeTransfer(address(msg.sender), _amount);
    }

    /**
    * @notice Allows the owner to recover tokens sent to the contract by mistake
     * @param _token: token address
     * @dev Callable by owner
     */
    function recoverToken(address _token) external onlyOwner {
        require(_token != address(stakedToken), "Operations: Cannot recover staked token");
        require(_token != address(rewardToken), "Operations: Cannot recover reward token");

        uint256 balance = IERC20Metadata(_token).balanceOf(address(this));
        require(balance != 0, "Operations: Cannot recover zero balance");

        IERC20Metadata(_token).safeTransfer(address(msg.sender), balance);

        emit TokenRecovery(_token, balance);
    }

    /*
     * @notice Stop rewards
     * @dev Only callable by owner
     */
    function stopReward() external onlyOwner {
        endTimestamp = block.timestamp;
        emit RewardsStop(endTimestamp);
    }

    /*
     * @notice Update pool limit per user
     * @dev Only callable by owner.
     * @param _userLimit: whether the limit remains forced
     * @param _poolLimitPerUser: new pool limit per user
     */
    function updatePoolLimitPerUser(bool _userLimit, uint256 _poolLimitPerUser) external onlyOwner {
        require(userLimit, "Must be set");
        if (_userLimit) {
            require(_poolLimitPerUser > poolLimitPerUser, "New limit must be higher");
            poolLimitPerUser = _poolLimitPerUser;
        } else {
            userLimit = _userLimit;
            poolLimitPerUser = 0;
        }
        emit NewPoolLimit(poolLimitPerUser);
    }

    /*
     * @notice Update reward per block
     * @dev Only callable by owner.
     * @param _rewardPerSecond: the reward per second
     */
    function updateRewardPerSecond(uint256 _rewardPerSecond) external onlyOwner {
        require(block.timestamp < startTimestamp, "Pool has started");
        uint256 decimalsRewardToken = uint256(rewardToken.decimals());
        require(PRECISION_FACTOR * _rewardPerSecond / (10**decimalsRewardToken) >= 100_000_000, "rewardPerSecond must be larger");
        rewardPerSecond = _rewardPerSecond;
        emit NewRewardPerSecond(_rewardPerSecond);
    }

    /**
     * @notice It allows the admin to update start and end blocks
     * @dev This function is only callable by owner.
     * @param _startTimestamp: the new start block timestamp
     * @param _endTimestamp: the new end block timestamp
     */
    function updateStartAndEndTimestamp(uint256 _startTimestamp, uint256 _endTimestamp) external onlyOwner {
        require(block.timestamp < startTimestamp, "Pool has started");
        require(_startTimestamp < _endTimestamp, "New startTimestamp must be lower than new endTimestamp");
        require(block.timestamp < _startTimestamp, "New startTimestamp must be higher than current block timestamp");

        startTimestamp = _startTimestamp;
        endTimestamp = _endTimestamp;

        // Set the lastRewardTimestamp as the startTimestamp
        lastRewardTimestamp = startTimestamp;

        emit NewStartAndEndTimestamp(_startTimestamp, _endTimestamp);
    }

    /**
     * @notice It allows the admin to update profile and thresholdPoints' requirement.
     * @dev This function is only callable by owner.
     * @param _isRequested: the profile is requested
     * @param _thresholdPoints: the threshold points
     */
    function updateProfileAndThresholdPointsRequirement(bool _isRequested, uint256 _thresholdPoints)
    external
    onlyOwner
    {
        require(pancakeProfile != address(0), "Pancake profile address is null");
        require(_thresholdPoints >= 0, "Threshold points need to exceed 0");
        pancakeProfileIsRequested = _isRequested;
        pancakeProfileThresholdPoints = _thresholdPoints;
        emit UpdateProfileAndThresholdPointsRequirement(_isRequested, _thresholdPoints);
    }

    /*
     * @notice View function to see pending reward on frontend.
     * @param _user: user address
     * @return Pending reward for a given user
     */
    function pendingReward(address _user) external view returns (uint256) {
        UserInfo storage user = userInfo[_user];
        uint256 stakedTokenSupply = stakedToken.balanceOf(address(this));
        if (block.timestamp > lastRewardTimestamp && stakedTokenSupply != 0) {
            uint256 multiplier = _getMultiplier(lastRewardTimestamp, block.timestamp);
            uint256 cakeReward = multiplier * rewardPerSecond;
            uint256 adjustedTokenPerShare = accTokenPerShare + (cakeReward * PRECISION_FACTOR) / stakedTokenSupply;
            return (user.amount * adjustedTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;
        } else {
            return (user.amount * accTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;
        }
    }

    /*
     * @notice Update reward variables of the given pool to be up-to-date.
     */
    function _updatePool() internal {
        if (block.timestamp <= lastRewardTimestamp) {
            return;
        }

        uint256 stakedTokenSupply = stakedToken.balanceOf(address(this));

        if (stakedTokenSupply == 0) {
            lastRewardTimestamp = block.timestamp;
            return;
        }

        uint256 multiplier = _getMultiplier(lastRewardTimestamp, block.timestamp);
        uint256 cakeReward = multiplier * rewardPerSecond;
        accTokenPerShare = accTokenPerShare + (cakeReward * PRECISION_FACTOR) / stakedTokenSupply;
        lastRewardTimestamp = block.timestamp;
    }

    /*
     * @notice Return reward multiplier over the given _from to _to block.
     * @param _from: block to start
     * @param _to: block to finish
     */
    function _getMultiplier(uint256 _from, uint256 _to) internal view returns (uint256) {
        if (_to <= endTimestamp) {
            return _to - _from;
        } else if (_from >= endTimestamp) {
            return 0;
        } else {
            return endTimestamp - _from;
        }
    }

    /*
     * @notice Return user limit is set or zero.
     */
    function hasUserLimit() public view returns (bool) {
        if (!userLimit || (block.timestamp >= (startTimestamp + numberSecondsForUserLimit))) {
            return false;
        }

        return true;
    }
}

contract SmartChefFactory is Ownable {
    event NewSmartChefContract(address indexed smartChef);

    constructor() {
        //
    }

    /*
     * @notice Deploy the pool
     * @param _stakedToken: staked token address
     * @param _rewardToken: reward token address
     * @param _rewardPerSecond: reward per second (in rewardToken)
     * @param _startTimestamp: start block timestamp
     * @param _endTimestamp: end block timestamp
     * @param _poolLimitPerUser: pool limit per user in stakedToken (if any, else 0)
     * @param _numberSecondsForUserLimit: seconds available for user limit (after start block)
     * @param _pancakeProfile: Pancake Profile address
     * @param _pancakeProfileIsRequested: Pancake Profile is requested
     * @param _pancakeProfileThresholdPoints: Pancake Profile need threshold points
     * @param _admin: admin address with ownership
     * @return address of new smart chef contract
     */
    function deployPool(
        IERC20Metadata _stakedToken,
        IERC20Metadata _rewardToken,
        uint256 _rewardPerSecond,
        uint256 _startTimestamp,
        uint256 _endTimestamp,
        uint256 _poolLimitPerUser,
        uint256 _numberSecondsForUserLimit,
        address _pancakeProfile,
        bool _pancakeProfileIsRequested,
        uint256 _pancakeProfileThresholdPoints,
        address _admin
    ) external onlyOwner {
        require(_stakedToken.totalSupply() >= 0);
        require(_rewardToken.totalSupply() >= 0);
        require(_stakedToken != _rewardToken, "Tokens must be be different");

        bytes memory bytecode = type(SmartChefInitializable).creationCode;
        // pass constructor argument
        bytecode = abi.encodePacked(
            bytecode,
            abi.encode(_pancakeProfile, _pancakeProfileIsRequested, _pancakeProfileThresholdPoints)
        );
        bytes32 salt = keccak256(abi.encodePacked(_stakedToken, _rewardToken, _startTimestamp));
        address smartChefAddress;

        assembly {
            smartChefAddress := create2(0, add(bytecode, 32), mload(bytecode), salt)
        }

        SmartChefInitializable(smartChefAddress).initialize(
            _stakedToken,
            _rewardToken,
            _rewardPerSecond,
            _startTimestamp,
            _endTimestamp,
            _poolLimitPerUser,
            _numberSecondsForUserLimit,
            _admin
        );

        emit NewSmartChefContract(smartChefAddress);
    }
}