// File: contracts/zeppelin/token/ERC20Basic.sol

pragma solidity ^0.4.18;


/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/179
 */
contract ERC20Basic {
  uint256 public totalSupply;
  function balanceOf(address who) public view returns (uint256);
  function transfer(address to, uint256 value) public returns (bool);
  event Transfer(address indexed from, address indexed to, uint256 value);
}

// File: contracts/zeppelin/math/SafeMath.sol

pragma solidity ^0.4.18;

library SafeMath {
  function mul(uint256 a, uint256 b) internal pure returns (uint256) {
    if (a == 0) {
      return 0;
    }
    uint256 c = a * b;
    assert(c / a == b);
    return c;
  }

  function div(uint256 a, uint256 b) internal pure returns (uint256) {
    uint256 c = a / b;
    return c;
  }

  function sub(uint256 a, uint256 b) internal pure returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  function add(uint256 a, uint256 b) internal pure returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }
}

// File: contracts/zeppelin/token/BasicToken.sol

pragma solidity ^0.4.18;




/**
 * @title Basic token
 * @dev Basic version of StandardToken, with no allowances.
 */
contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  /**
  * @dev transfer token for a specified address
  * @param _to The address to transfer to.
  * @param _value The amount to be transferred.
  */
  function transfer(address _to, uint256 _value) public returns (bool) {
    require(_to != address(0));
    require(_value <= balances[msg.sender]);

    // SafeMath.sub will throw if there is not enough balance.
    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    Transfer(msg.sender, _to, _value);
    return true;
  }

  /**
  * @dev Gets the balance of the specified address.
  * @param _owner The address to query the the balance of.
  * @return An uint256 representing the amount owned by the passed address.
  */
  function balanceOf(address _owner) public view returns (uint256 balance) {
    return balances[_owner];
  }

}

// File: contracts/zeppelin/token/ERC20.sol

pragma solidity ^0.4.18;



/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender) public view returns (uint256);
  function transferFrom(address from, address to, uint256 value) public returns (bool);
  function approve(address spender, uint256 value) public returns (bool);
  event Approval(address indexed owner, address indexed spender, uint256 value);
}

// File: contracts/zeppelin/token/StandardToken.sol

pragma solidity ^0.4.18;




/**
 * @title Standard ERC20 token
 *
 * @dev Implementation of the basic standard token.
 * @dev https://github.com/ethereum/EIPs/issues/20
 * @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
 */
contract StandardToken is ERC20, BasicToken {
  mapping (address => mapping (address => uint256)) internal allowed;

  /**
   * @dev Transfer tokens from one address to another
   * @param _from address The address which you want to send tokens from
   * @param _to address The address which you want to transfer to
   * @param _value uint256 the amount of tokens to be transferred
   */
  function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
    require(_to != address(0));
    require(_value <= balances[_from]);
    require(_value <= allowed[_from][msg.sender]);

    balances[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
    Transfer(_from, _to, _value);
    return true;
  }

  /**
   * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
   *
   * Beware that changing an allowance with this method brings the risk that someone may use both the old
   * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
   * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
   * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
   * @param _spender The address which will spend the funds.
   * @param _value The amount of tokens to be spent.
   */
  function approve(address _spender, uint256 _value) public returns (bool) {
    allowed[msg.sender][_spender] = _value;
    Approval(msg.sender, _spender, _value);
    return true;
  }

  /**
   * @dev Function to check the amount of tokens that an owner allowed to a spender.
   * @param _owner address The address which owns the funds.
   * @param _spender address The address which will spend the funds.
   * @return A uint256 specifying the amount of tokens still available for the spender.
   */
  function allowance(address _owner, address _spender) public view returns (uint256) {
    return allowed[_owner][_spender];
  }

  /**
   * approve should be called when allowed[_spender] == 0. To increment
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   */
  function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
    allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

  function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
    uint oldValue = allowed[msg.sender][_spender];
    if (_subtractedValue > oldValue) {
      allowed[msg.sender][_spender] = 0;
    } else {
      allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
    }
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

}

// File: contracts/zeppelin/ownership/Ownable.sol

pragma solidity ^0.4.18;


contract Ownable {
  address public owner;


  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);


  function Ownable() public {
    owner = msg.sender;
  }



  modifier onlyOwner() {
    require(msg.sender == owner);
    _;
  }


  function transferOwnership(address newOwner) public onlyOwner {
    require(newOwner != address(0));
    OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}

// File: contracts/zeppelin/lifecycle/Pausable.sol

pragma solidity ^0.4.18;


contract Pausable is Ownable {
  event PausePublic(bool newState);
  event PauseOwnerAdmin(bool newState);

  bool public pausedPublic = true;
  bool public pausedOwnerAdmin = false;

  address public admin;

  modifier whenNotPaused() {
    if(pausedPublic) {
      if(!pausedOwnerAdmin) {
        require(msg.sender == admin || msg.sender == owner);
      } else {
        revert();
      }
    }
    _;
  }

  function pause(bool newPausedPublic, bool newPausedOwnerAdmin) onlyOwner public {
    require(!(newPausedPublic == false && newPausedOwnerAdmin == true));

    pausedPublic = newPausedPublic;
    pausedOwnerAdmin = newPausedOwnerAdmin;

    PausePublic(newPausedPublic);
    PauseOwnerAdmin(newPausedOwnerAdmin);
  }
}

// File: contracts/zeppelin/token/PausableToken.sol

pragma solidity ^0.4.18;



/**
 * @title Pausable token
 *
 * @dev StandardToken modified with pausable transfers.
 **/

contract PausableToken is StandardToken, Pausable {

  function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
    return super.transfer(_to, _value);
  }

  function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) {
    return super.transferFrom(_from, _to, _value);
  }

  function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
    return super.approve(_spender, _value);
  }

  function increaseApproval(address _spender, uint _addedValue) public whenNotPaused returns (bool success) {
    return super.increaseApproval(_spender, _addedValue);
  }

  function decreaseApproval(address _spender, uint _subtractedValue) public whenNotPaused returns (bool success) {
    return super.decreaseApproval(_spender, _subtractedValue);
  }
}

// File: contracts/RexToken.sol

pragma solidity ^0.4.18;


contract RexToken is PausableToken {

    string  public  constant name = "Revexx Coin";
    string  public  constant symbol = "REX";
    uint8   public  constant decimals = 18;

    mapping(address => uint) approvedInvestorListWithDate;

    function RexToken( address _admin, uint256 _totalTokenAmount )
    {
        admin = _admin;

        totalSupply = _totalTokenAmount;
        balances[msg.sender] = _totalTokenAmount;
        Transfer(address(0x0), msg.sender, _totalTokenAmount);
    }

    function getTime() public constant returns (uint) {
        return now;
    }

    function isUnlocked() internal view returns (bool) {
        return getTime() >= getLockFundsReleaseTime(msg.sender);
    }

    modifier validDestination( address to )
    {
        require(to != address(0x0));
        require(to != address(this));
        _;
    }

    modifier onlyWhenUnlocked()
    {
        require(isUnlocked());            
        _;
    }

    function transfer(address _to, uint256 _value) onlyWhenUnlocked validDestination(_to) returns (bool)
    {
        return super.transfer(_to, _value);
    }

    function transferFrom(address _from, address _to, uint256 _value) onlyWhenUnlocked validDestination(_to) returns (bool)
    {
        require(getTime() >= getLockFundsReleaseTime(_from));
        return super.transferFrom(_from, _to, _value);
    }

    function getLockFundsReleaseTime(address _addr) public view returns(uint) 
    {
        return approvedInvestorListWithDate[_addr];
    }

    function setLockFunds(address[] newInvestorList, uint releaseTime) onlyOwner public 
    {
        require(releaseTime > getTime());
        for (uint i = 0; i < newInvestorList.length; i++)
        {
            approvedInvestorListWithDate[newInvestorList[i]] = releaseTime;
        }
    }

    function removeLockFunds(address[] investorList) onlyOwner public 
    {
        for (uint i = 0; i < investorList.length; i++)
        {
            approvedInvestorListWithDate[investorList[i]] = 0;
            delete(approvedInvestorListWithDate[investorList[i]]);
        }
    }

    function setLockFund(address newInvestor, uint releaseTime) onlyOwner public 
    {
        require(releaseTime > getTime());
        approvedInvestorListWithDate[newInvestor] = releaseTime;
    }


    function removeLockFund(address investor) onlyOwner public 
    {
        approvedInvestorListWithDate[investor] = 0;
        delete(approvedInvestorListWithDate[investor]);
    }


    event Burn(address indexed _burner, uint256 _value);

    function burn(uint256 _value) onlyOwner public returns (bool)
    {
        balances[msg.sender] = balances[msg.sender].sub(_value);
        totalSupply = totalSupply.sub(_value);
        Burn(msg.sender, _value);
        Transfer(msg.sender, address(0x0), _value);
        return true;
    }

    function burnFrom(address _from, uint256 _value) onlyOwner public returns (bool)
    {
        assert( transferFrom( _from, msg.sender, _value ) );
        return burn(_value);
    }

    function emergencyERC20Drain( ERC20 token, uint256 amount ) onlyOwner {
        token.transfer( owner, amount );
    }

    event AdminTransferred(address indexed previousAdmin, address indexed newAdmin);

    function changeAdmin(address newAdmin) onlyOwner {
        AdminTransferred(admin, newAdmin);
        admin = newAdmin;
    }

    function () public payable 
    {
        revert();
    }
}