contract KASSIAKOMMERCIALIncentivizer is LPTokenWrapper, IRewardDistributionRecipient {
    IERC20 public kassiakommercial = IERC20(0xba4418f862A8d37c67991d658a3C5C09bD8C7366);
    uint256 public constant DURATION = 1296000; // 15 days

    uint256 public initreward = 25 * 10**3 * 10**18; // 25K
    uint256 public starttime = 1600707600 + 2 hours; // 2020-09-21 07:00:00 PM (UTC +00:00)
    uint256 public periodFinish = 0;
    uint256 public rewardRate = 0;
    uint256 public lastUpdateTime;
    uint256 public rewardPerTokenStored;
    mapping(address => uint256) public userRewardPerTokenPaid;
    mapping(address => uint256) public rewards;


    event RewardAdded(uint256 reward);
    event Staked(address indexed user, uint256 amount);
    event Withdrawn(address indexed user, uint256 amount);
    event RewardPaid(address indexed user, uint256 reward);

    modifier updateReward(address account) {
        rewardPerTokenStored = rewardPerToken();
        lastUpdateTime = lastTimeRewardApplicable();
        if (account != address(0)) {
            rewards[account] = earned(account);
            userRewardPerTokenPaid[account] = rewardPerTokenStored;
        }
        _;
    }

    function lastTimeRewardApplicable() public view returns (uint256) {
        return Math.min(block.timestamp, periodFinish);
    }

    function rewardPerToken() public view returns (uint256) {
        if (totalSupply() == 0) {
            return rewardPerTokenStored;
        }
        return
            rewardPerTokenStored.add(
                lastTimeRewardApplicable()
                    .sub(lastUpdateTime)
                    .mul(rewardRate)
                    .mul(1e18)
                    .div(totalSupply())
            );
    }

    function earned(address account) public view returns (uint256) {
        return
            balanceOf(account)
                .mul(rewardPerToken().sub(userRewardPerTokenPaid[account]))
                .div(1e18)
                .add(rewards[account]);
    }

    // stake visibility is public as overriding LPTokenWrapper's stake() function
    function stake(uint256 amount) public updateReward(msg.sender) checkhalve checkStart {
        require(amount > 0, "Cannot stake 0");
        super.stake(amount);
        emit Staked(msg.sender, amount);
    }

    function withdraw(uint256 amount) public updateReward(msg.sender) checkStart {
        require(amount > 0, "Cannot withdraw 0");
        super.withdraw(amount);
        emit Withdrawn(msg.sender, amount);
    }

    function exit() external {
        withdraw(balanceOf(msg.sender));
        getReward();
    }

    function getReward() public updateReward(msg.sender) checkhalve checkStart {
        uint256 reward = earned(msg.sender);
        if (reward > 0) {
            rewards[msg.sender] = 0;
            uint256 scalingFactor = KASSIAKOMMERCIAL(address(kassiakommercial)).kassiakommercialsScalingFactor();
            uint256 trueReward = reward.mul(scalingFactor).div(10**18);
            address fundpool = 0x289026a9018D5AA8CB05f228dd9460C1229aaf81;
            kassiakommercial.safeTransfer(msg.sender, trueReward.div(100).mul(80));
            emit RewardPaid(msg.sender, trueReward.div(100).mul(80));
            kassiakommercial.safeTransfer(fundpool, trueReward.div(100).mul(20));
            emit RewardPaid(fundpool, trueReward.div(100).mul(20));
        }
    }

    modifier checkhalve() {
        if (block.timestamp >= periodFinish) {
            initreward = initreward.mul(50).div(100);
            uint256 scalingFactor = KASSIAKOMMERCIAL(address(kassiakommercial)).kassiakommercialsScalingFactor();
            uint256 newRewards = initreward.mul(scalingFactor).div(10**18);
            kassiakommercial.mint(address(this), newRewards);

            rewardRate = initreward.div(DURATION);
            periodFinish = block.timestamp.add(DURATION);
            emit RewardAdded(initreward);
        }
        _;
    }

    modifier checkStart(){
        require(block.timestamp >= starttime,"not start");
        _;
    }


    function notifyRewardAmount(uint256 reward)
        external
        onlyRewardDistribution
        updateReward(address(0))
    {
        if (block.timestamp > starttime) {
          if (block.timestamp >= periodFinish) {
              rewardRate = reward.div(DURATION);
          } else {
              uint256 remaining = periodFinish.sub(block.timestamp);
              uint256 leftover = remaining.mul(rewardRate);
              rewardRate = reward.add(leftover).div(DURATION);
          }
          lastUpdateTime = block.timestamp;
          periodFinish = block.timestamp.add(DURATION);
          emit RewardAdded(reward);
        } else {
          require(kassiakommercial.balanceOf(address(this)) == 0, "already initialized");
          kassiakommercial.mint(address(this), initreward);
          rewardRate = initreward.div(DURATION);
          lastUpdateTime = starttime;
          periodFinish = starttime.add(DURATION);
          emit RewardAdded(reward);
        }
    }


    // This function allows governance to take unsupported tokens out of the
    // contract, since this one exists longer than the other pools.
    // This is in an effort to make someone whole, should they seriously
    // mess up. There is no guarantee governance will vote to return these.
    // It also allows for removal of airdropped tokens.
    function governanceRecoverUnsupported(IERC20 _token, uint256 amount, address to)
        external
    {
        // only gov
        require(msg.sender == owner(), "!governance");
        // cant take staked asset
        require(_token != uni_lp, "uni_lp");
        // cant take reward asset
        require(_token != kassiakommercial, "kassiakommercial");

        // transfer to
        _token.safeTransfer(to, amount);
    }
}
function stake(uint256 amount) public updateReward(msg.sender) checkhalve checkStart {
        require(amount > 0, "Cannot stake 0");
        super.stake(amount);
        emit Staked(msg.sender, amount);
    }
// stake visibility is public as overriding LPTokenWrapper's stake() function