contract DreamDAILP is LPTokenWrapper, IRewardDistributionRecipient {
    // Token to be rewarded
    IERC20 public rewardToken = IERC20(address(0));
    IERC20 public multiplierToken = IERC20(address(0));
    CalculateCycle public calculateCycle = CalculateCycle(address(0));
    uint256 public DURATION = 4 weeks;

    uint256 public periodFinish = 0;
    uint256 public rewardRate = 0;
    uint256 public lastUpdateTime;
    uint256 public rewardPerTokenStored;
    uint256 public deployedTime;
    uint256 public constant napsDiscountRange = 8 hours;
    uint256 public constant napsLevelOneCost = 1000 * 1e18;
    uint256 public constant napsLevelTwoCost = 2000 * 1e18;
    uint256 public constant napsLevelThreeCost = 5000 * 1e18;
    uint256 public constant napsLevelFourCost = 10000 * 1e18;
    uint256 public constant napsLevelFiveCost = 20000 * 1e18;
    uint256 public constant napsLevelSixCost = 30000 *1e18;

    uint256 public constant TwoPercentBonus = 2 * 10 ** 16;
    uint256 public constant TenPercentBonus = 1 * 10 ** 17;
    uint256 public constant TwentyPercentBonus = 2 * 10 ** 17;
    uint256 public constant ThirtyPercentBonus = 3 * 10 ** 17;
    uint256 public constant FourtyPercentBonus = 4 * 10 ** 17;
    uint256 public constant FiftyPercentBonus = 5 * 10 ** 17;
    uint256 public constant SixtyPercentBonus = 6 * 10 ** 17;
    uint256 public constant SeventyPercentBonus = 7 * 10 ** 17;
    uint256 public constant SeventyFivePercentBonus = 75 * 10 ** 16;
    uint256 public constant EightyPercentBonus = 8 * 10 ** 17;
    uint256 public constant NinetyPercentBonus = 9 * 10 ** 17;
    uint256 public constant OneHundredPercentBonus = 1 * 10 ** 18;
    
    mapping(address => uint256) public userRewardPerTokenPaid;
    mapping(address => uint256) public rewards;
    mapping(address => uint256) public spentNAPS;
    mapping(address => uint256) public NAPSlevel;

    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    event Withdrawn(address indexed user, uint256 amount);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);
    event Boost(uint256 level);
    modifier updateReward(address account) {
        rewardPerTokenStored = rewardPerToken();
        lastUpdateTime = lastTimeRewardApplicable();
        if (account != address(0)) {
            rewards[account] = earned(account);
            userRewardPerTokenPaid[account] = rewardPerTokenStored;
        }
        _;
    }
    constructor(address _stakingToken,address _rewardToken,address _multiplierToken,address _calculateCycleAddr) public{
      setBPT(_stakingToken);
      rewardToken = IERC20(_rewardToken);
      multiplierToken = IERC20(_multiplierToken);
      calculateCycle = CalculateCycle(_calculateCycleAddr);
      deployedTime = block.timestamp;
    }

    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)
                .mul(getTotalMultiplier(account))
                .div(1e18)
                .add(rewards[account]);
    }

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

    function withdraw(uint256 amount) public override updateReward(msg.sender) {
        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) {
        uint256 reward = earned(msg.sender);
        if (reward > 0) {
            rewards[msg.sender] = 0;
            rewardToken.mint(msg.sender, reward);
            emit RewardPaid(msg.sender, reward);
        }
    }

    function notifyRewardAmount(uint256 reward)
        external
        override
        onlyRewardDistribution
        updateReward(address(0))
    {
        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);
    }
    function setCycleContract(address _cycleContract) public onlyRewardDistribution {
        calculateCycle = CalculateCycle(_cycleContract);
    }
    // naps stuff
    function getLevel(address account) external view returns (uint256) {
        return NAPSlevel[account];
    }

    function getSpent(address account) external view returns (uint256) {
        return spentNAPS[account];
    }
    // Returns the number of naps token to boost
    function calculateCost(uint256 level) public view returns(uint256) {
        uint256 cycles = calculateCycle.calculate(deployedTime,block.timestamp,napsDiscountRange);
        // Cap it to 5 times
        if(cycles > 5) {
            cycles = 5;
        }
        // // cost = initialCost * (0.9)^cycles = initial cost * (9^cycles)/(10^cycles)
        if (level == 1) {
            return napsLevelOneCost.mul(9 ** cycles).div(10 ** cycles);
        }else if(level == 2) {
            return napsLevelTwoCost.mul(9 ** cycles).div(10 ** cycles);
        }else if(level == 3) {
            return napsLevelThreeCost.mul(9 ** cycles).div(10 ** cycles);
        }else if(level == 4) {
            return napsLevelFourCost.mul(9 ** cycles).div(10 ** cycles);
        }else if(level == 5) {
            return napsLevelFiveCost.mul(9 ** cycles).div(10 ** cycles);
        }else if(level == 6) {
            return napsLevelSixCost.mul(9 ** cycles).div(10 ** cycles);
        }
    }
    function purchase(uint256 level) external {
        require(NAPSlevel[msg.sender] <= level,"Cannot downgrade level or same level");
        uint256 cost = calculateCost(level);
        uint256 finalCost = cost.sub(spentNAPS[msg.sender]);
        // Owner dev fund
        multiplierToken.safeTransferFrom(msg.sender,devFund,finalCost);
        spentNAPS[msg.sender] = spentNAPS[msg.sender].add(finalCost);
        NAPSlevel[msg.sender] = level;
        emit Boost(level);
    }

    function getTotalMultiplier(address account) public view returns (uint256) {
        // uint256 zzzMultiplier = multiplier.getTotalMultiplier(account);
        uint256 napsMultiplier = 0;
        if(NAPSlevel[account] == 1) {
            napsMultiplier = TenPercentBonus;
        }else if(NAPSlevel[account] == 2) {
            napsMultiplier = TwentyPercentBonus;
        }else if(NAPSlevel[account] == 3) {
            napsMultiplier = ThirtyPercentBonus;
        }else if(NAPSlevel[account] == 4) {
            napsMultiplier = FiftyPercentBonus;
        }else if(NAPSlevel[account] == 5) {
            napsMultiplier = SeventyFivePercentBonus;
        }else if(NAPSlevel[account] == 6) {
            napsMultiplier = OneHundredPercentBonus;
        }
        return napsMultiplier.add(1*10**18);
    }
}
function stake(uint256 amount) public override updateReward(msg.sender) {
        require(amount > 0, "Cannot stake 0");
        super.stake(amount);
        emit Staked(msg.sender, amount);
    }
// stake visibility is public as overriding LPTokenWrapper's stake() function