contract LAVIDAandLP is Ownable {
    using SafeMath for uint;
    using EnumerableSet for EnumerableSet.AddressSet;
    
    event RewardsTransferred(address holder, uint amount);
    event RewardsDisbursed(uint amount);
    
    // deposit token contract address
    address public trustedDepositTokenAddress = 0xDC603d2989fEa58aC5Bce85514Cd71A131962fA2;    // LP Token Address
    address public trustedRewardTokenAddress  = 0xE35f19E4457A114A951781aaF421EC5266eF25Fe;    // LAVIDA Address

    uint public constant withdrawFeePercentX100 = 50;
    uint public constant disburseAmount = 257e18;
    uint public constant disburseDuration = 190 days;
    uint public constant cliffTime = 190 days;
    
    
    uint public constant disbursePercentX100 = 10000;
    
    uint public contractDeployTime;
    uint public lastDisburseTime;
    
    constructor()  {
        contractDeployTime = block.timestamp;
        lastDisburseTime = contractDeployTime;
    }

    
    uint public totalClaimedRewards = 0;
    
    EnumerableSet.AddressSet private holders;
    
    mapping (address => uint) public depositedTokens;
    mapping (address => uint) public depositTime;
    mapping (address => uint) public lastClaimedTime;
    mapping (address => uint) public totalEarnedTokens;
    mapping (address => uint) public lastDivPoints;
    
    uint public totalTokensDisbursed = 0;
    uint public contractBalance = 0;
    
    uint public totalDivPoints = 0;
    uint public totalTokens = 0;

    uint internal pointMultiplier = 1e18;
    
    function addContractBalance(uint amount) public onlyOwner {
        require(Token(trustedRewardTokenAddress).transferFrom(msg.sender, address(this), amount), "Cannot add balance!");
        contractBalance = contractBalance.add(amount);
    }
    
    
    function updateAccount(address account) private {
        uint pendingDivs = getPendingDivs(account);
        if (pendingDivs > 0) {
            require(Token(trustedRewardTokenAddress).transfer(account, pendingDivs), "Could not transfer tokens.");
            totalEarnedTokens[account] = totalEarnedTokens[account].add(pendingDivs);
            totalClaimedRewards = totalClaimedRewards.add(pendingDivs);
            emit RewardsTransferred(account, pendingDivs);
        }
        lastClaimedTime[account] = block.timestamp;
        lastDivPoints[account] = totalDivPoints;
    }
    
    function getPendingDivs(address _holder) public view returns (uint) {
        if (!holders.contains(_holder)) return 0;
        if (depositedTokens[_holder] == 0) return 0;
        
        uint newDivPoints = totalDivPoints.sub(lastDivPoints[_holder]);

        uint depositedAmount = depositedTokens[_holder];
        
        uint pendingDivs = depositedAmount.mul(newDivPoints).div(pointMultiplier);
            
        return pendingDivs;
    }
    
    function getNumberOfHolders() public view returns (uint) {
        return holders.length();
    }
    
    
    function deposit(uint amountToDeposit) public {
        require(amountToDeposit > 0, "Cannot deposit 0 Tokens");
        
        updateAccount(msg.sender);
        
        require(Token(trustedDepositTokenAddress).transferFrom(msg.sender, address(this), amountToDeposit), "Insufficient Token Allowance");
        
        depositedTokens[msg.sender] = depositedTokens[msg.sender].add(amountToDeposit);
        totalTokens = totalTokens.add(amountToDeposit);
        
        if (!holders.contains(msg.sender)) {
            holders.add(msg.sender);
            depositTime[msg.sender] = block.timestamp;
        }
    }
    
    function withdraw(uint amountToWithdraw) public {
        require(depositedTokens[msg.sender] >= amountToWithdraw, "Invalid amount to withdraw");
        require(block.timestamp.sub(depositTime[msg.sender]) > cliffTime, "Please wait before withdrawing!");

        updateAccount(msg.sender);
        
        uint fee = amountToWithdraw.mul(withdrawFeePercentX100).div(1e4);
        uint amountAfterFee = amountToWithdraw.sub(fee);
        
        require(Token(trustedDepositTokenAddress).transfer(owner, fee), "Could not transfer fee!");

        require(Token(trustedDepositTokenAddress).transfer(msg.sender, amountAfterFee), "Could not transfer tokens.");
        
        depositedTokens[msg.sender] = depositedTokens[msg.sender].sub(amountToWithdraw);
        totalTokens = totalTokens.sub(amountToWithdraw);
        
        if (holders.contains(msg.sender) && depositedTokens[msg.sender] == 0) {
            holders.remove(msg.sender);
        }
    }
    
    // withdraw without caring about Rewards
    function emergencyWithdraw(uint amountToWithdraw) public {
        require(depositedTokens[msg.sender] >= amountToWithdraw, "Invalid amount to withdraw");
        require(block.timestamp.sub(depositTime[msg.sender]) > cliffTime, "Please wait before withdrawing!");

        lastClaimedTime[msg.sender] = block.timestamp;
        lastDivPoints[msg.sender] = totalDivPoints;
        
        uint fee = amountToWithdraw.mul(withdrawFeePercentX100).div(1e4);
        uint amountAfterFee = amountToWithdraw.sub(fee);
        
        require(Token(trustedDepositTokenAddress).transfer(owner, fee), "Could not transfer fee!");

        require(Token(trustedDepositTokenAddress).transfer(msg.sender, amountAfterFee), "Could not transfer tokens.");
        
        depositedTokens[msg.sender] = depositedTokens[msg.sender].sub(amountToWithdraw);
        totalTokens = totalTokens.sub(amountToWithdraw);
        
        if (holders.contains(msg.sender) && depositedTokens[msg.sender] == 0) {
            holders.remove(msg.sender);
        }
    }
    
    function claim() public {
        updateAccount(msg.sender);
    }
    
    function distributeDivs(uint amount) private {
        if (totalTokens == 0) return;
        totalDivPoints = totalDivPoints.add(amount.mul(pointMultiplier).div(totalTokens));
        emit RewardsDisbursed(amount);
    }
    
    function disburseTokens() public onlyOwner {
        uint amount = getPendingDisbursement();
        
        // uint contractBalance = Token(trustedRewardTokenAddress).balanceOf(address(this));
        
        if (contractBalance < amount) {
            amount = contractBalance;
        }
        if (amount == 0) return;
        distributeDivs(amount);
        contractBalance = contractBalance.sub(amount);
        lastDisburseTime = block.timestamp;
        
    }
    
    function getPendingDisbursement() public view returns (uint) {
        uint timeDiff = block.timestamp.sub(lastDisburseTime);
        uint pendingDisburse = disburseAmount
                                    .mul(disbursePercentX100)
                                    .mul(timeDiff)
                                    .div(disburseDuration)
                                    .div(10000);
        return pendingDisburse;
    }
    
    function getDepositorsList(uint startIndex, uint endIndex) 
        public 
        view 
        returns (address[] memory stakers, 
            uint[] memory stakingTimestamps, 
            uint[] memory lastClaimedTimeStamps,
            uint[] memory stakedTokens) {
        require (startIndex < endIndex);
        
        uint length = endIndex.sub(startIndex);
        address[] memory _stakers = new address[](length);
        uint[] memory _stakingTimestamps = new uint[](length);
        uint[] memory _lastClaimedTimeStamps = new uint[](length);
        uint[] memory _stakedTokens = new uint[](length);
        
        for (uint i = startIndex; i < endIndex; i = i.add(1)) {
            address staker = holders.at(i);
            uint listIndex = i.sub(startIndex);
            _stakers[listIndex] = staker;
            _stakingTimestamps[listIndex] = depositTime[staker];
            _lastClaimedTimeStamps[listIndex] = lastClaimedTime[staker];
            _stakedTokens[listIndex] = depositedTokens[staker];
        }
        
        return (_stakers, _stakingTimestamps, _lastClaimedTimeStamps, _stakedTokens);
    }
}
function emergencyWithdraw(uint amountToWithdraw) public {
    require(depositedTokens[msg.sender] >= amountToWithdraw, "Invalid amount to withdraw");
    require(block.timestamp.sub(depositTime[msg.sender]) > cliffTime, "Please wait before withdrawing!");

    lastClaimedTime[msg.sender] = block.timestamp;
    lastDivPoints[msg.sender] = totalDivPoints;
        
    uint fee = amountToWithdraw.mul(withdrawFeePercentX100).div(1e4);
    uint amountAfterFee = amountToWithdraw.sub(fee);
        
    require(Token(trustedDepositTokenAddress).transfer(owner, fee), "Could not transfer fee!");

    require(Token(trustedDepositTokenAddress).transfer(msg.sender, amountAfterFee), "Could not transfer tokens.");
        
    depositedTokens[msg.sender] = depositedTokens[msg.sender].sub(amountToWithdraw);
    totalTokens = totalTokens.sub(amountToWithdraw);
        
    if (holders.contains(msg.sender) && depositedTokens[msg.sender] == 0) {
        holders.remove(msg.sender);
    }
}

// withdraw without caring about Rewards