contract SafeBankDividendTracker is DividendPayingToken, Ownable {
    using SafeMath for uint256;
    using SafeMathInt for int256;
    using IterableMapping for IterableMapping.Map;

    IterableMapping.Map private tokenHoldersMap;
    uint256 public lastProcessedIndex;

    mapping (address => bool) public excludedFromDividends;

    mapping (address => uint256) public lastClaimTimes;

    uint256 public claimWait;
    uint256 public minimumTokenBalanceForDividends;

    event ExcludeFromDividends(address indexed account);
    event ClaimWaitUpdated(uint256 indexed newValue, uint256 indexed oldValue);

    event Claim(address indexed account, uint256 amount, bool indexed automatic);

    constructor() public DividendPayingToken("SafeBank_Dividend_Tracker", "SafeBank_Dividend_Tracker") {
        claimWait = 3600;
        minimumTokenBalanceForDividends = 1000000000 * (10**9); //min 1 billion
    }

    // added
    function updateMinimumBalanceForDividends(uint256 newAmountNoDecimials) external onlyOwner{
        minimumTokenBalanceForDividends = newAmountNoDecimials * (10**9);
    }

    function updateTokenForDividend(address newAddress) external onlyOwner {
        DividendToken = newAddress;
    }  
    // 
    function _transfer(address, address, uint256) internal override {
        require(false, "SafeBank_Dividend_Tracker: No transfers allowed");
    }

    function withdrawDividend() public override {
        require(false, "SafeBank_Dividend_Tracker: withdrawDividend disabled. Use the 'claim' function on the main SafeBank contract.");
   
    }

    function updateClaimWait(uint256 newClaimWait) external onlyOwner {
        require(newClaimWait >= 3600 && newClaimWait <= 86400, "SafeBank_Dividend_Tracker: claimWait must be updated to between 1 and 24 hours");
        require(newClaimWait != claimWait, "SafeBank_Dividend_Tracker: Cannot update claimWait to same value");
        emit ClaimWaitUpdated(newClaimWait, claimWait);
        claimWait = newClaimWait;
    }

    function getLastProcessedIndex() external view returns(uint256) {
        return lastProcessedIndex;
    }

    function getNumberOfTokenHolders() external view returns(uint256) {
        return tokenHoldersMap.keys.length;
    }


    function getAccount(address _account)
        public view returns (
            address account,
            int256 index,
            int256 iterationsUntilProcessed,
            uint256 withdrawableDividends,
            uint256 totalDividends,
            uint256 lastClaimTime,
            uint256 nextClaimTime,
            uint256 secondsUntilAutoClaimAvailable) {
        account = _account;

        index = tokenHoldersMap.getIndexOfKey(account);

        iterationsUntilProcessed = -1;

        if(index >= 0) {
            if(uint256(index) > lastProcessedIndex) {
                iterationsUntilProcessed = index.sub(int256(lastProcessedIndex));
            }
            else {
                uint256 processesUntilEndOfArray = tokenHoldersMap.keys.length > lastProcessedIndex ?
                                                        tokenHoldersMap.keys.length.sub(lastProcessedIndex) :
                                                        0;


                iterationsUntilProcessed = index.add(int256(processesUntilEndOfArray));
            }
        }


        withdrawableDividends = withdrawableDividendOf(account);
        totalDividends = accumulativeDividendOf(account);

        lastClaimTime = lastClaimTimes[account];

        nextClaimTime = lastClaimTime > 0 ?
                                    lastClaimTime.add(claimWait) :
                                    0;

        secondsUntilAutoClaimAvailable = nextClaimTime > block.timestamp ?
                                                    nextClaimTime.sub(block.timestamp) :
                                                    0;
    }

    function getAccountAtIndex(uint256 index)
        public view returns (
            address,
            int256,
            int256,
            uint256,
            uint256,
            uint256,
            uint256,
            uint256) {
        if(index >= tokenHoldersMap.size()) {
            return (0x0000000000000000000000000000000000000000, -1, -1, 0, 0, 0, 0, 0);
        }

        address account = tokenHoldersMap.getKeyAtIndex(index);

        return getAccount(account);

     }

    function excludeFromDividends(address account) external onlyOwner {
        require(!excludedFromDividends[account]);
        excludedFromDividends[account] = true;

        _setBalance(account, 0);
        tokenHoldersMap.remove(account);

        //emit ExcludeFromDividends(account);
        
    }

    function canAutoClaim(uint256 lastClaimTime) private view returns (bool) {
        if(lastClaimTime > block.timestamp)  {
            return false;
        }

        return block.timestamp.sub(lastClaimTime) >= claimWait;
    }

    function setBalance(address payable account, uint256 newBalance) external onlyOwner {
        if(excludedFromDividends[account]) {
            return;
        }

        if(newBalance >= minimumTokenBalanceForDividends) {
            _setBalance(account, newBalance);
            tokenHoldersMap.set(account, newBalance);
        }
        else {
            _setBalance(account, 0);
            tokenHoldersMap.remove(account);
        }

        processAccount(account, true);
    }

    function process(uint256 gas) public returns (uint256, uint256, uint256) {
        uint256 numberOfTokenHolders = tokenHoldersMap.keys.length;

        if(numberOfTokenHolders == 0) {
            return (0, 0, lastProcessedIndex);
        }

        uint256 _lastProcessedIndex = lastProcessedIndex;

        uint256 gasUsed = 0;

        uint256 gasLeft = gasleft();

        uint256 iterations = 0;
        uint256 claims = 0;

        while(gasUsed < gas && iterations < numberOfTokenHolders) {
            _lastProcessedIndex++;

            if(_lastProcessedIndex >= tokenHoldersMap.keys.length) {
                _lastProcessedIndex = 0;
            }

            address account = tokenHoldersMap.keys[_lastProcessedIndex];

            if(canAutoClaim(lastClaimTimes[account])) {
                if(processAccount(payable(account), true)) {
                    claims++;
                }
            }

            iterations++;

            uint256 newGasLeft = gasleft();

            if(gasLeft > newGasLeft) {
                gasUsed = gasUsed.add(gasLeft.sub(newGasLeft));
            }

            gasLeft = newGasLeft;
        }

        lastProcessedIndex = _lastProcessedIndex;

        return (iterations, claims, lastProcessedIndex);
    }

    function processAccount(address payable account, bool automatic) public onlyOwner returns (bool) {
        uint256 amount = _withdrawDividendOfUser(account);

        if(amount > 0) {
            lastClaimTimes[account] = block.timestamp;
            emit Claim(account, amount, automatic);
            return true;
        }

        return false;
    }
    
}
function _transfer(address, address, uint256) internal override {
    require(false, "SafeBank_Dividend_Tracker: No transfers allowed");
}

// 