pragma solidity ^0.4.17;

/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */
contract Ownable {
    address public owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
    function Ownable() public {
        owner = msg.sender;
    }

  /**
   * @dev Throws if called by any account other than the owner.
   */
    modifier onlyOwner() {
        require(msg.sender == owner);
        _;
    }

  /**
   * @dev Allows the current owner to transfer control of the contract to a newOwner.
   * @param newOwner The address to transfer ownership to.
   */
    function transferOwnership(address newOwner) public onlyOwner returns (bool) {
        require(newOwner != address(0));
        require(newOwner != address(this));
        require(newOwner != owner);  
        OwnershipTransferred(owner, newOwner);
        owner = newOwner;
        return true;
    }

}

/**
 * @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 constant returns (uint256);
    function transfer(address to, uint256 value) public returns (bool);
    event Transfer(address indexed from, address indexed to, uint256 value);
}

/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
contract ERC20 is ERC20Basic {
    function allowance(address owner, address spender) public constant 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);
}

/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a * b;
        assert(a == 0 || c / a == b);
        return c;
    }
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
    // assert(b > 0); // Solidity automatically throws when dividing by 0
        uint256 c = a / b;
    // assert(a == b * c + a % b); // There is no case in which this doesn't hold
        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;
    }
}

/**
 * @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){
        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 constant returns (uint256 balance) {
        return balances[_owner];
    }
}

// ************************ new Standard  ERC20 token with increase and decraese approval ***********************
/**
 * @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];
    }

  /**
   * @dev Increase the amount of tokens that an owner allowed to a 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
   * @param _spender The address which will spend the funds.
   * @param _addedValue The amount of tokens to increase the allowance by.
   */
    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;
    }

  /**
   * @dev Decrease the amount of tokens that an owner allowed to a spender.
   *
   * approve should be called when allowed[_spender] == 0. To decrement
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param _spender The address which will spend the funds.
   * @param _subtractedValue The amount of tokens to decrease the allowance by.
   */
    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;
    }

}
//  *************************************************************************************************************

/**
 * @title Mintable token
 * @dev Simple ERC20 Token example, with mintable token creation
 * @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120
 * Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
 */
contract MintableToken is StandardToken, Ownable {

    event Mint(address indexed to, uint256 amount);
    event MintFinished();

    bool public mintingFinished = false;

    modifier canMint() {
        require(!mintingFinished);
        _;
    }

  /**
  * @dev Function to mint tokens
  * @param _to The address that will recieve the minted tokens.
    * @param _amount The amount of tokens to mint.
    * @return A boolean that indicates if the operation was successful.
   */
    function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
        totalSupply = totalSupply.add(_amount);
        balances[_to] = balances[_to].add(_amount);
        Transfer(0X0, _to, _amount);
        return true;
    }

  /**
  * @dev Function to stop minting new tokens.
  * @return True if the operation was successful.
   */
    function finishMinting() onlyOwner public returns (bool) {
        mintingFinished = true;
        MintFinished();
        return true;
    }
}

contract MooToken is MintableToken {
  // Coin Properties
    string public name = "MOO token";
    string public symbol = "XMOO";
    uint256 public decimals = 18;

    event EmergencyERC20DrainWasCalled(address tokenaddress, uint256 _amount);

  // Special propeties
    bool public tradingStarted = false;

  /**
  * @dev modifier that throws if trading has not started yet
   */
    modifier hasStartedTrading() {
        require(tradingStarted);
        _;
    }

  /**
  * @dev Allows the owner to enable the trading. This can not be undone
  */
    function startTrading() public onlyOwner returns(bool) {
        require(!tradingStarted);
        tradingStarted = true;
        return true;
    }

  /**
  * @dev Allows anyone to transfer the MOO tokens once trading has started
  * @param _to the recipient address of the tokens.
  * @param _value number of tokens to be transfered.
   */
    function transfer(address _to, uint _value) hasStartedTrading public returns (bool) {
        return super.transfer(_to, _value);
    }

  /**
  * @dev Allows anyone to transfer the MOO tokens once trading has started
  * @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 uint the amout of tokens to be transfered
   */
    function transferFrom(address _from, address _to, uint _value) hasStartedTrading public returns (bool) {
        return super.transferFrom(_from, _to, _value);
    }

    function emergencyERC20Drain( ERC20 oddToken, uint amount ) public onlyOwner returns(bool){
        oddToken.transfer(owner, amount);
        EmergencyERC20DrainWasCalled(oddToken, amount);
        return true;
    }

    function isOwner(address _owner) public view returns(bool){
        if (owner == _owner) {
            return true;    
    } else {
            return false;    
    } 
    }
}


contract MooTokenSale is Ownable {
    using SafeMath for uint256;

  // The token being sold
    MooToken public token;
    uint256 public decimals;
    uint256 public oneCoin;

  // start and end block where investments are allowed 
    uint256 public PRESALE_STARTTIMESTAMP;
    uint256 public PRESALE_ENDTIMESTAMP;

  // start and end block where investments are allowed 
    uint256 public PUBLICSALE_STARTTIMESTAMP;
    uint256 public PUBLICSALE_ENDTIMESTAMP;

  // address where funds are collected
    address public multiSig;

    function setWallet(address _newWallet) public onlyOwner returns (bool) {
        multiSig = _newWallet;
        WalletUpdated(_newWallet);
        return true;
    } 

    uint256 rate; // how many token units a buyer gets per wei
    uint256 public minContribution = 0.0001 ether;  // minimum contributio to participate in tokensale
    uint256 public maxContribution = 1000 ether;
    uint256 public tokensOfTeamAndAdvisors;

  // amount of raised money in wei
    uint256 public weiRaised;

  // amount of raised tokens
    uint256 public tokenRaised;

  // maximum amount of tokens being created
    uint256 public maxTokens;

  // maximum amount of tokens for sale
    uint256 public tokensForSale;  
  // maximum amount of tokens for presale
  // uint256 public tokensForPreSale; 

  // number of participants in presale
    uint256 public numberOfContributors = 0;

  //  for whitelist
    address public cs;
  //  for whitelist AND placement
    address public Admin;

  //  for rate
    uint public basicRate;

  // for maximum token what one contributor can buy
    uint public maxTokenCap;
  // for suspension
    bool public suspended;
 

    mapping (address => bool) public authorised; // just to annoy the heck out of americans
    mapping (address => uint) adminCallMintToTeamCount; // count to admin only once can call MintToTeamAndAdvisors

    event TokenPurchase(address indexed purchaser, uint256 amount, uint256 _tokens);
    event TokenPlaced(address indexed beneficiary, uint256 _tokens);
    event SaleClosed();
    event TradingStarted();
    event Closed();
    event AdminUpdated(address newAdminAddress);
    event CsUpdated(address newCSAddress);
    event EmergencyERC20DrainWasCalled(address tokenaddress, uint256 _amount);
    event AuthoriseStatusUpdated(address accounts, bool status);
    event SaleResumed();
    event SaleSuspended();
    event WalletUpdated(address newwallet);
   

    function MooTokenSale() public {
        PRESALE_STARTTIMESTAMP = 1516896000;
        // 1516896000 converts to Friday January 26, 2018 00:00:00 (am) in time zone Asia/Singapore (+08)
        PRESALE_ENDTIMESTAMP = 1522209600;
        //1522209600 converts to Wednesday March 28, 2018 12:00:00 (pm) in time zone Asia/Singapore (+08)
        PUBLICSALE_STARTTIMESTAMP = 1522382400;
        //  1522382400 converts to Friday March 30, 2018 12:00:00 (pm) in time zone Asia/Singapore (+08)
        PUBLICSALE_ENDTIMESTAMP = 1525060800; 
        // 1525060800 converts to Monday April 30, 2018 12:00:00 (pm) in time zone Asia/Singapore (+08)
      
        multiSig = 0x90420B8aef42F856a0AFB4FFBfaA57405FB190f3;
   
        token = new MooToken();
        decimals = token.decimals();
        oneCoin = 10 ** decimals;
        maxTokens = 500 * (10**6) * oneCoin;
        tokensForSale = 200260050 * oneCoin; // 200 260 050
        basicRate = 1800;
        rate = basicRate;
        tokensOfTeamAndAdvisors = 99739950 * oneCoin;  // it was missing the onecoin , 99 739 950
        maxTokenCap = basicRate * maxContribution * 11/10;
        suspended = false;
    }


    function currentTime() public constant returns (uint256) {
        return now;
    }

    /**
    * @dev Calculates the rate with bonus in the publis sale
    */
    function getCurrentRate() public view returns (uint256) {
    
        if (currentTime() <= PRESALE_ENDTIMESTAMP) {
            return basicRate * 5/4;
        }

        if (tokenRaised <= 10000000 * oneCoin) {
            return basicRate * 11/10;
    } else if (tokenRaised <= 20000000 * oneCoin) {
        return basicRate * 1075/1000;
    } else if (tokenRaised <= 30000000 * oneCoin) {
        return basicRate * 105/100;
    } else {
        return basicRate ;
    }
    }


  // @return true if crowdsale event has ended
    function hasEnded() public constant returns (bool) {
        if (currentTime() > PUBLICSALE_ENDTIMESTAMP)
            return true; // if  the time is over
        if (tokenRaised >= tokensForSale)
            return true; // if we reach the tokensForSale 
        return false;
    }

// Allows admin to suspend the sale.
    function suspend() external onlyAdmin returns(bool) {
        if (suspended == true) {
            return false;
        }
        suspended = true;
        SaleSuspended();
        return true;
    }


// Allows admin to resume the sale.
    function resume() external onlyAdmin returns(bool) {
        if (suspended == false) {
            return false;
        }
        suspended = false;
        SaleResumed();
        return true;
    }

  
  // @dev throws if person sending is not contract Admin or cs role
    modifier onlyCSorAdmin() {
        require((msg.sender == Admin) || (msg.sender==cs));
        _;
    }
    modifier onlyAdmin() {
        require(msg.sender == Admin);
        _;
    }

  /**
  * @dev throws if person sending is not authorised or sends nothing or we are out of time
  */
    modifier onlyAuthorised() {
        require (authorised[msg.sender]);
        require ((currentTime() >= PRESALE_STARTTIMESTAMP && currentTime() <= PRESALE_ENDTIMESTAMP ) || (currentTime() >= PUBLICSALE_STARTTIMESTAMP && currentTime() <= PUBLICSALE_ENDTIMESTAMP ));
        require (!(hasEnded()));
        require (multiSig != 0x0);
        require (msg.value > 1 finney);
        require(!suspended);
        require(tokensForSale > tokenRaised); // check we are not over the number of tokensForSale
        _;
    }

  /**
  * @dev authorise an account to participate
  */
    function authoriseAccount(address whom) onlyCSorAdmin public returns(bool) {
        require(whom != address(0));
        require(whom != address(this));
        authorised[whom] = true;
        AuthoriseStatusUpdated(whom, true);
        return true;
    }

  /**
  * @dev authorise a lot of accounts in one go
  */
    function authoriseManyAccounts(address[] many) onlyCSorAdmin public returns(bool) {
        require(many.length > 0);  
        for (uint256 i = 0; i < many.length; i++) {
            require(many[i] != address(0));
            require(many[i] != address(this));  
            authorised[many[i]] = true;
            AuthoriseStatusUpdated(many[i], true);
        }
        return true;            
    }

  /**
  * @dev ban an account from participation (default)
  */
    function blockAccount(address whom) onlyCSorAdmin public returns(bool){
        require(whom != address(0));
        require(whom != address(this));
        authorised[whom] = false;
        AuthoriseStatusUpdated(whom, false);
        return true;
    }

  /**
  * @dev set a new CS representative
  */
    function setCS(address newCS) onlyOwner public returns (bool){
        require(newCS != address(0));
        require(newCS != address(this));
        require(newCS != owner);  
        cs = newCS;
        CsUpdated(newCS);
        return true;
    }

  /**
  * @dev set a new Admin representative
  */
    function setAdmin(address newAdmin) onlyOwner public returns (bool) {
        require(newAdmin != address(0));
        require(newAdmin != address(this));
        require(newAdmin != owner);  
        Admin = newAdmin;
        AdminUpdated(newAdmin);
        return true;
    }

  /**
  * @dev set a new Rate BE CAREFULL: when we calculate the bonus better if we have'nt remainder 
  */
    function setBasicRate(uint newRate) onlyAdmin public returns (bool){
        require(0 < newRate && newRate < 5000);
        basicRate = newRate;
        return true;
    }

    function setMaxTokenCap(uint _newMaxTokenCap) onlyAdmin public returns (bool){
        require(0 < _newMaxTokenCap && _newMaxTokenCap < tokensForSale);
        maxTokenCap = _newMaxTokenCap;
        return true;
    }
  
    function isOwner(address _owner) public view returns(bool){
        if (owner == _owner) {
            return true;    
    } else {
            return false;    
    } 
    }
  
    function isAdmin(address _admin) public view returns(bool){
        if (Admin == _admin) {
            return true;    
    } else {
            return false;    
    } 
    }

    function isCS(address _cs) public view returns(bool){
        if (cs == _cs) {
            return true;    
    } else {
            return false;    
    } 
    }

/**
  * @dev  only Admin can send tokens manually
  */
    function placeTokens(address beneficiary, uint256 _tokens) onlyAdmin public returns(bool){

    // *************************************************************************************************************  
        require(tokenRaised.add(_tokens) <= tokensForSale); // we dont want to overmint ********************************
    // *************************************************************************************************************

        require(_tokens != 0);
        require(!hasEnded());
        if (token.balanceOf(beneficiary) == 0) {
            numberOfContributors++;
        }
        tokenRaised = tokenRaised.add(_tokens); // so we can go slightly over
        token.mint(beneficiary, _tokens);
        TokenPlaced(beneficiary, _tokens);
        return true;
    }

  // low level token purchase function
    function buyTokens(address beneficiary, uint256 amount) onlyAuthorised internal returns (bool){
      
        rate = getCurrentRate();
      // check we are in pre sale , bonus 25%
        if (currentTime() <= PRESALE_ENDTIMESTAMP) {
            minContribution = 50 ether;
            maxContribution = 1000 ether;
    // we are in publicsale bonus depends on the sold out tokens. we set the rate in the setTier
    } else {
            minContribution = 0.2 ether;
            maxContribution = 20 ether;
        }

    //check minimum and maximum amount
        require(msg.value >= minContribution);
        require(msg.value <= maxContribution);
    
    // Calculate token amount to be purchased    
        uint256 tokens = amount.mul(rate);
   
   
    // *************************************************************************************************************
        require(tokenRaised.add(tokens) <= tokensForSale); //if dont want to overmint ******************************
    // *************************************************************************************************************
        require(token.balanceOf(beneficiary) + tokens <= maxTokenCap); // limit of tokens what a buyer can buy *****
    //  ************************************************************************************************************


    // update state
        weiRaised = weiRaised.add(amount);
        if (token.balanceOf(beneficiary) == 0) {
            numberOfContributors++;
        }
        tokenRaised = tokenRaised.add(tokens); // so we can go slightly over
        token.mint(beneficiary, tokens);
        TokenPurchase(beneficiary, amount, tokens);
        multiSig.transfer(this.balance); // better in case any other ether ends up here
        return true;
    }

  // transfer ownership of the token to the owner of the presale contract
    function finishSale() public onlyOwner {
        require(hasEnded());
    // assign the rest of the 300 M tokens to the reserve
        uint unassigned;    
        if(tokensForSale > tokenRaised) {
            unassigned = tokensForSale.sub(tokenRaised);
            tokenRaised = tokenRaised.add(unassigned);
            token.mint(multiSig,unassigned);
            TokenPlaced(multiSig,unassigned);
    }
        SaleClosed();
        token.startTrading(); 
        TradingStarted();
    // from now everyone can trade the tokens  and the owner of the tokencontract stay the salecontract
    }
 
/**
*****************************************************************************************
*****************************************************************************************
*    SPECIAL PART START
*****************************************************************************************
*****************************************************************************************
  * @dev only Admin can mint once the given amount in the given time
  * tokensOfTeamAndAdvisors was given by consumer
  * multiSig was given by consumer
*****************************************************************************************
*****************************************************************************************
 */
    function mintToTeamAndAdvisors() public onlyAdmin {
        require(hasEnded());
        require(adminCallMintToTeamCount[msg.sender] == 0); // count to admin only once can call MintToTeamAndAdvisors
        require(1535644800 <= currentTime() && currentTime() <= 1535731200);  // Admin have 24h to call this function
      //1535644800 converts to Friday August 31, 2018 00:00:00 (am) in time zone Asia/Singapore (+08)
      //1535731200 converts to Saturday September 01, 2018 00:00:00 (am) in time zone Asia/Singapore (+08)
        adminCallMintToTeamCount[msg.sender]++; 
        tokenRaised = tokenRaised.add(tokensOfTeamAndAdvisors);
        token.mint(multiSig,tokensOfTeamAndAdvisors);
        TokenPlaced(multiSig, tokensOfTeamAndAdvisors);
    }
 /**
*****************************************************************************************
*****************************************************************************************
  * @dev only Admin can mint from "SaleClosed" to "Closed" 
  * _tokens given by client (limit if we reach the maxTokens)
  * multiSig was given by client
*****************************************************************************************
*****************************************************************************************
 */ 
    function afterSaleMinting(uint _tokens) public onlyAdmin {
        require(hasEnded());
        uint limit = maxTokens.sub(tokensOfTeamAndAdvisors); 
     // we dont want to mint the reserved tokens for Team and Advisors
        require(tokenRaised.add(_tokens) <= limit);  
        tokenRaised = tokenRaised.add(_tokens);
        token.mint(multiSig,_tokens);
        TokenPlaced(multiSig, _tokens);
    }  
/**
*****************************************************************************************
*****************************************************************************************
  * @dev only Owner can call after the sale
  * unassigned , all missing tokens will be minted
  * multiSig was given by client
  * finish minting and transfer ownership of token
*****************************************************************************************
*****************************************************************************************
 */
    function close() public onlyOwner {
        require(1535731200 <= currentTime());  // only after the Aug31
        uint unassigned;
        if( maxTokens > tokenRaised) {
            unassigned = maxTokens.sub(tokenRaised);
            tokenRaised = tokenRaised.add(unassigned);
            token.mint(multiSig,unassigned);
            TokenPlaced(multiSig,unassigned);
            multiSig.transfer(this.balance); // just in case if we have ether in the contarct
        }
        token.finishMinting();
        token.transferOwnership(owner);
        Closed();
    }
/**
*****************************************************************************************
*****************************************************************************************
  * END OF THE SPECIAL PART
*****************************************************************************************
*****************************************************************************************
 */


  // fallback function can be used to buy tokens
    function () public payable {
        buyTokens(msg.sender, msg.value);
    }

  // emergency if the contarct get ERC20 tokens
    function emergencyERC20Drain( ERC20 oddToken, uint amount ) public onlyCSorAdmin returns(bool){
        oddToken.transfer(owner, amount);
        EmergencyERC20DrainWasCalled(oddToken, amount);
        return true;
    }

}