pragma solidity 0.5.10;

/**
 * @title Node assignment contract
 */
contract NEST_NodeAssignment {
    
    using SafeMath for uint256;
    IBMapping mappingContract;                              //  Mapping contract
    IBNEST nestContract;                                    //  NEST contract
    SuperMan supermanContract;                              //  NestNode contract
    NEST_NodeSave nodeSave;                                 //  NestNode save contract
    NEST_NodeAssignmentData nodeAssignmentData;             //  NestNode data assignment contract

    /**
    * @dev Initialization method
    * @param map Voting contract address
    */
    constructor (address map) public {
        mappingContract = IBMapping(map); 
        nestContract = IBNEST(address(mappingContract.checkAddress("nest")));
        supermanContract = SuperMan(address(mappingContract.checkAddress("nestNode")));
        nodeSave = NEST_NodeSave(address(mappingContract.checkAddress("nestNodeSave")));
        nodeAssignmentData = NEST_NodeAssignmentData(address(mappingContract.checkAddress("nodeAssignmentData")));
    }
    
    /**
    * @dev Reset voting contract
    * @param map Voting contract address
    */
    function changeMapping(address map) public onlyOwner{
        mappingContract = IBMapping(map); 
        nestContract = IBNEST(address(mappingContract.checkAddress("nest")));
        supermanContract = SuperMan(address(mappingContract.checkAddress("nestNode")));
        nodeSave = NEST_NodeSave(address(mappingContract.checkAddress("nestNodeSave")));
        nodeAssignmentData = NEST_NodeAssignmentData(address(mappingContract.checkAddress("nodeAssignmentData")));
    }
    
    /**
    * @dev Deposit NEST token
    * @param amount Amount of deposited NEST
    */
    function bookKeeping(uint256 amount) public {
        require(amount > 0);
        require(nestContract.transferFrom(address(msg.sender), address(nodeSave), amount));
        nodeAssignmentData.addNest(amount);
    }
    
    // NestNode receive and settlement
    function nodeGet() public {
        require(address(msg.sender) == address(tx.origin));
        require(supermanContract.balanceOf(address(msg.sender)) > 0);
        uint256 allAmount = nodeAssignmentData.checkNodeAllAmount();
        uint256 amount = allAmount.sub(nodeAssignmentData.checkNodeLatestAmount(address(msg.sender)));
        uint256 getAmount = amount.mul(supermanContract.balanceOf(address(msg.sender))).div(1500);
        require(nestContract.balanceOf(address(nodeSave)) >= getAmount);
        nodeSave.turnOut(getAmount,address(msg.sender));
        nodeAssignmentData.addNodeLatestAmount(address(msg.sender),allAmount);
    }
    
    // NestNode transfer settlement
    function nodeCount(address fromAdd, address toAdd) public {
        require(address(supermanContract) == address(msg.sender));
        require(supermanContract.balanceOf(address(fromAdd)) > 0);
        uint256 allAmount = nodeAssignmentData.checkNodeAllAmount();
        uint256 amountFrom = allAmount.sub(nodeAssignmentData.checkNodeLatestAmount(address(fromAdd)));
        uint256 getAmountFrom = amountFrom.mul(supermanContract.balanceOf(address(fromAdd))).div(1500);
        if (nestContract.balanceOf(address(nodeSave)) >= getAmountFrom) {
            nodeSave.turnOut(getAmountFrom,address(fromAdd));
            nodeAssignmentData.addNodeLatestAmount(address(fromAdd),allAmount);
        }
        uint256 amountTo = allAmount.sub(nodeAssignmentData.checkNodeLatestAmount(address(toAdd)));
        uint256 getAmountTo = amountTo.mul(supermanContract.balanceOf(address(toAdd))).div(1500);
        if (nestContract.balanceOf(address(nodeSave)) >= getAmountTo) {
            nodeSave.turnOut(getAmountTo,address(toAdd));
            nodeAssignmentData.addNodeLatestAmount(address(toAdd),allAmount);
        }
    }
    
    // NestNode receivable amount
    function checkNodeNum() public view returns (uint256) {
         uint256 allAmount = nodeAssignmentData.checkNodeAllAmount();
         uint256 amount = allAmount.sub(nodeAssignmentData.checkNodeLatestAmount(address(msg.sender)));
         uint256 getAmount = amount.mul(supermanContract.balanceOf(address(msg.sender))).div(1500);
         return getAmount; 
    }
    
    // Administrator only
    modifier onlyOwner(){
        require(mappingContract.checkOwners(msg.sender));
        _;
    }
}

// Mapping contract
contract IBMapping {
    // Check address
	function checkAddress(string memory name) public view returns (address contractAddress);
	// Check whether an administrator
	function checkOwners(address man) public view returns (bool);
}

// NEST node save contract
contract NEST_NodeSave {
    function turnOut(uint256 amount, address to) public returns(uint256);
}

// NestNode assignment data contract
contract NEST_NodeAssignmentData {
    function addNest(uint256 amount) public;
    function addNodeLatestAmount(address add ,uint256 amount) public;
    function checkNodeAllAmount() public view returns (uint256);
    function checkNodeLatestAmount(address add) public view returns (uint256);
}

// NestNode contract
interface SuperMan {
    function totalSupply() external view returns (uint256);
    function balanceOf(address who) external view returns (uint256);
    function allowance(address owner, address spender) external view returns (uint256);
    function transfer(address to, uint256 value) external returns (bool);
    function approve(address spender, uint256 value) external returns (bool);
    function transferFrom(address from, address to, uint256 value) external returns (bool);
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// NEST contract
contract IBNEST {
    function totalSupply() public view returns (uint supply);
    function balanceOf( address who ) public view returns (uint value);
    function allowance( address owner, address spender ) public view returns (uint _allowance);
    function transfer( address to, uint256 value) external;
    function transferFrom( address from, address to, uint value) public returns (bool ok);
    function approve( address spender, uint value ) public returns (bool ok);
    event Transfer( address indexed from, address indexed to, uint value);
    event Approval( address indexed owner, address indexed spender, uint value);
}

/**
 * @title SafeMath
 * @dev Math operations with safety checks that revert on error
 */
library SafeMath {
    int256 constant private INT256_MIN = -2**255;

    /**
    * @dev Multiplies two unsigned integers, reverts on overflow.
    */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b);

        return c;
    }

    /**
    * @dev Multiplies two signed integers, reverts on overflow.
    */
    function mul(int256 a, int256 b) internal pure returns (int256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
        if (a == 0) {
            return 0;
        }

        require(!(a == -1 && b == INT256_MIN)); // This is the only case of overflow not detected by the check below

        int256 c = a * b;
        require(c / a == b);

        return c;
    }

    /**
    * @dev Integer division of two unsigned integers truncating the quotient, reverts on division by zero.
    */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
    * @dev Integer division of two signed integers truncating the quotient, reverts on division by zero.
    */
    function div(int256 a, int256 b) internal pure returns (int256) {
        require(b != 0); // Solidity only automatically asserts when dividing by 0
        require(!(b == -1 && a == INT256_MIN)); // This is the only case of overflow

        int256 c = a / b;

        return c;
    }

    /**
    * @dev Subtracts two unsigned integers, reverts on overflow (i.e. if subtrahend is greater than minuend).
    */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a);
        uint256 c = a - b;

        return c;
    }

    /**
    * @dev Subtracts two signed integers, reverts on overflow.
    */
    function sub(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a - b;
        require((b >= 0 && c <= a) || (b < 0 && c > a));

        return c;
    }

    /**
    * @dev Adds two unsigned integers, reverts on overflow.
    */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a);

        return c;
    }

    /**
    * @dev Adds two signed integers, reverts on overflow.
    */
    function add(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a + b;
        require((b >= 0 && c >= a) || (b < 0 && c < a));

        return c;
    }

    /**
    * @dev Divides two unsigned integers and returns the remainder (unsigned integer modulo),
    * reverts when dividing by zero.
    */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b != 0);
        return a % b;
    }
}

{
  "compilationTarget": {
    "NEST_NodeAssignment.sol": "NEST_NodeAssignment"
  },
  "evmVersion": "petersburg",
  "libraries": {},
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}