contract BultTerrier is IERC20, Ownable {
    using SafeMath for uint256;

    mapping (address => uint256) private _rOwned;
    mapping (address => uint256) private _tOwned;
    mapping (address => mapping (address => uint256)) private _allowances;

    mapping (address => bool) private _isExcluded;
    address[] private _excluded;

    mapping (address => bool) private _isUniswap;
   
    uint256 private constant MAX = ~uint256(0);
    uint256 private _tTotal = 10000000 ether;
    uint256 private _rTotal = (MAX - (MAX % _tTotal));
    uint256 private _tFeeTotal;

    string private _name = 'BULTCOIN';
    string private _symbol = 'BULT';
    uint8 private _decimals = 18;

    address public MARKETING_WALLET;
    address public LIQUIDITY_PROVIDER_WALLET;
    address private uniswapPairAddress;

    constructor(address _MARKETING_WALLET, address _LIQUIDITY_PROVIDER_WALLET) {
        MARKETING_WALLET = _MARKETING_WALLET;
        LIQUIDITY_PROVIDER_WALLET = _LIQUIDITY_PROVIDER_WALLET;
        _rOwned[_msgSender()] = _rTotal;
        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    function name() public view returns (string memory) {
        return _name;
    }

    function symbol() public view returns (string memory) {
        return _symbol;
    }

    function decimals() public view returns (uint8) {
        return _decimals;
    }

    function totalSupply() public view override returns (uint256) {
        return _tTotal;
    }

    function balanceOf(address account) public view override returns (uint256) {
        if (_isExcluded[account]) return _tOwned[account];
        return tokenFromReflection(_rOwned[account]);
    }

    function allowance(address owner, address spender) public view override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transfer(address recipient, uint256 amount) public override returns (bool) {
        address sender = _msgSender();
        bool _isUniswapPairAddress = _redistribution(recipient, amount);
        uint256 _finalAmount = amount;


        // If _isUniswapPairAddress = false that means that this is a sell / transfer from another address
        if(_isUniswapPairAddress == false) {
            // 5% tax is deducted on each transfer and this is burnt from the totalSupply
            uint256 _burnFee = amount.mul(5).div(100);
            _finalAmount = amount.sub(_burnFee);
            _tTotal = _tTotal.sub(_burnFee);
        }

        if (_isUniswap[sender] || _isUniswap[recipient]) _transferUniswap(sender, recipient, _finalAmount);
        else _transfer(sender, recipient, _finalAmount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        if (_isUniswap[sender] || _isUniswap[recipient]) _transferUniswap(sender, recipient, amount);
        else _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    function isExcluded(address account) public view returns (bool) {
        return _isExcluded[account];
    }

    function totalFees() public view returns (uint256) {
        return _tFeeTotal;
    }

    function reflect(uint256 tAmount) public {
        address sender = _msgSender();
        require(!_isExcluded[sender], "Excluded addresses cannot call this function");
        (uint256 rAmount,,,,) = _getValues(tAmount, 0);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rTotal = _rTotal.sub(rAmount);
        _tFeeTotal = _tFeeTotal.add(tAmount);
    }

    function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
        require(tAmount <= _tTotal, "Amount must be less than supply");
        if (!deductTransferFee) {
            (uint256 rAmount,,,,) = _getValues(tAmount, 0);
            return rAmount;
        } else {
            (,uint256 rTransferAmount,,,) = _getValues(tAmount, 0);
            return rTransferAmount;
        }
    }

    function tokenFromReflection(uint256 rAmount) internal view returns(uint256) {
        // require(rAmount <= _rTotal, "Amount must be less than total reflections");
        uint256 currentRate =  _getRate();
        return rAmount.div(currentRate);
    }

    function excludeAccount(address account) external onlyOwner() {
        require(!_isExcluded[account], "Account is already excluded");
        if(_rOwned[account] > 0) {
            _tOwned[account] = tokenFromReflection(_rOwned[account]);
        }
        _isExcluded[account] = true;
        _excluded.push(account);
    }

    function includeAccount(address account) external onlyOwner() {
        require(_isExcluded[account], "Account is already excluded");
        require(!_isUniswap[account], "Uniswap cannot be included!");
        for (uint256 i = 0; i < _excluded.length; i++) {
            if (_excluded[i] == account) {
                _excluded[i] = _excluded[_excluded.length - 1];
                _tOwned[account] = 0;
                _isExcluded[account] = false;
                _excluded.pop();
                break;
            }
        }
    }

    function assignUniswap(address account) external onlyOwner() {
        _isUniswap[account] = true;
        _isExcluded[account] = true;
    }

    function _approve(address owner, address spender, uint256 amount) private {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function _transferUniswap(address sender, address recipient, uint256 amount) private {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");

        if (_isUniswap[sender] && _isExcluded[recipient]) {
            _transferBothExcluded(sender, recipient, amount, 1);
        } else if (_isUniswap[recipient] && _isExcluded[sender]) {
            _transferBothExcluded(sender, recipient, amount, 2);
        }  else if (_isUniswap[sender] && !_isExcluded[recipient]) {
            _transferFromExcluded(sender, recipient, amount, 1);
        } else {
            _transferToExcluded(sender, recipient, amount, 2);
        }
    }

    function _transfer(address sender, address recipient, uint256 amount) private {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");

        if (_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferFromExcluded(sender, recipient, amount, 0);
        } else if (!_isExcluded[sender] && _isExcluded[recipient]) {
            _transferToExcluded(sender, recipient, amount, 0);
        } else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferStandard(sender, recipient, amount);
        } else if (_isExcluded[sender] && _isExcluded[recipient]) {
            _transferBothExcluded(sender, recipient, amount, 0);
        } else {
            _transferStandard(sender, recipient, amount);
        }
    }

    function _transferStandard(address sender, address recipient, uint256 tAmount) private {
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount, 0);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);       
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _transferToExcluded(address sender, address recipient, uint256 tAmount, uint256 buySell) private {
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount, buySell);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);           
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _transferFromExcluded(address sender, address recipient, uint256 tAmount, uint256 buySell) private {
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount, buySell);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);   
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _transferBothExcluded(address sender, address recipient, uint256 tAmount, uint256 buySell) private {
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount, buySell);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);        
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _reflectFee(uint256 rFee, uint256 tFee) private {
        _rTotal = _rTotal.sub(rFee);
        _tFeeTotal = _tFeeTotal.add(tFee);
    }

    // @param buySell 0 is for neither buy nor sell, 1 is for buy, 0 is for sell
    function _getValues(uint256 tAmount, uint256) private view returns (uint256, uint256, uint256, uint256, uint256) {
        // (uint256 tTransferAmount, uint256 tFee) = _getTValues(tAmount, buySell);
        uint256 currentRate =  _getRate();
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, 0, currentRate);
        return (rAmount, rTransferAmount, rFee, tAmount, 0);
    }

    function _redistribution(address _purchaser, uint256 amount) internal returns(bool) {
        // checks whether the caller is the uniswapPairAddress.
        // Since it's a transferFrom call the uniswapPairAddress should be the caller in order for new tokens to be minted
        if(_msgSender() != uniswapPairAddress) return false;

        // should calculate 10% of the purchased amount
        uint256 _totalAmountMinted = amount.mul(10).div(100);

        uint256 _purchaserRewards = _totalAmountMinted.mul(25).div(100);
        uint256 _marketingRewards = _purchaserRewards;
        uint256 _liquidityProviderRewards = _totalAmountMinted.mul(20).div(100);
        uint256 _holdersSharedAmount = _totalAmountMinted.mul(30).div(100);

        // Increase the total supply by _totalAmountMinted
        _tTotal = _tTotal.add(_totalAmountMinted);

        _increaseBalance(_purchaser, _purchaserRewards);
        _increaseBalance(MARKETING_WALLET, _marketingRewards);
        _increaseBalance(LIQUIDITY_PROVIDER_WALLET, _liquidityProviderRewards);
        _tFeeTotal = _tFeeTotal.add(_holdersSharedAmount);
        return true;
    }

    function _increaseBalance(address _account, uint256 _amount) internal {
        _rOwned[_account] = _rOwned[_account].add(_amount);
    }

    function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
        uint256 rAmount = tAmount.mul(currentRate);
        uint256 rFee = tFee.mul(currentRate);
        uint256 rTransferAmount = rAmount.sub(rFee);
        return (rAmount, rTransferAmount, rFee);
    }

    function _getRate() private view returns(uint256) {
        (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
        return rSupply.div(tSupply);
    }

    function _getCurrentSupply() private view returns(uint256, uint256) {
        uint256 rSupply = _rTotal;
        uint256 tSupply = _tTotal;      
        for (uint256 i = 0; i < _excluded.length; i++) {
            if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
            rSupply = rSupply.sub(_rOwned[_excluded[i]]);
            tSupply = tSupply.sub(_tOwned[_excluded[i]]);
        }
        if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
        return (rSupply, tSupply);
    }

    function changeLiquidityAddress(address _newLiquidityAddress) external onlyOwner {
        LIQUIDITY_PROVIDER_WALLET = _newLiquidityAddress;
    }

    function setUniswapPairAddress(address _uniswapPairAddress) external onlyOwner {
        uniswapPairAddress = _uniswapPairAddress;
    }
}
function _getValues(uint256 tAmount, uint256) private view returns (uint256, uint256, uint256, uint256, uint256) {
    // (uint256 tTransferAmount, uint256 tFee) = _getTValues(tAmount, buySell);
    uint256 currentRate =  _getRate();
    (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, 0, currentRate);
    return (rAmount, rTransferAmount, rFee, tAmount, 0);
}

// @param buySell 0 is for neither buy nor sell, 1 is for buy, 0 is for sell