contract Crowdsale {
  using SafeMath for uint256;

  // uint256 durationInMinutes;
  // address where funds are collected
  address public wallet;
  // token address
  address public addressOfTokenUsedAsReward;

  // uint256 public price = 300;
  uint256 public weiPerToken = 1787289880;

  token tokenReward;

  // mapping (address => uint) public contributions;
  


  // start and end timestamps where investments are allowed (both inclusive)
  // uint256 public startTime;
  // uint256 public endTime;
  // amount of raised money in wei
  uint256 public weiRaised;

  /**
   * event for token purchase logging
   * @param purchaser who paid for the tokens
   * @param beneficiary who got the tokens
   * @param value weis paid for purchase
   * @param amount amount of tokens purchased
   */
  event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);


  function Crowdsale() {
    //You will change this to your wallet where you need the ETH 
    wallet = 0x6a3a52fF68f684A6D8402F450d52275F41246253;
    // durationInMinutes = _durationInMinutes;
    //Here will come the checksum address we got
    addressOfTokenUsedAsReward = 0x6A3777eB316ed485dd399628E8C0711eB8f5b0dB;


    tokenReward = token(addressOfTokenUsedAsReward);
  }

  bool public started = true;

  function startSale(){
    if (msg.sender != wallet) throw;
    started = true;
  }

  function stopSale(){
    if(msg.sender != wallet) throw;
    started = false;
  }

  // function setPrice(uint256 _price){
  //   if(msg.sender != wallet) throw;
  //   price = _price;
  // }

  function setWeiPerToken(uint256 _weiPerToken){
    if(msg.sender!=wallet) throw;
    weiPerToken = _weiPerToken;
  }

  function changeWallet(address _wallet){
    if(msg.sender != wallet) throw;
    wallet = _wallet;
  }

  function changeTokenReward(address _token){
    if(msg.sender!=wallet) throw;
    tokenReward = token(_token);
  }

  // fallback function can be used to buy tokens
  function () payable {
    buyTokens(msg.sender);
  }

  // low level token `purchase function
  function buyTokens(address beneficiary) payable {
    require(beneficiary != 0x0);
    require(validPurchase());

    uint256 weiAmount = msg.value;

    // calculate token amount to be sent
    uint256 tokens = ((weiAmount * (10**18)) / weiPerToken);//weiamount * price 
    // uint256 tokens = (weiAmount/10**(18-decimals)) * price;//weiamount * price 

    // update state
    weiRaised = weiRaised.add(weiAmount);
    
    // if(contributions[msg.sender].add(weiAmount)>10*10**18) throw;
    // contributions[msg.sender] = contributions[msg.sender].add(weiAmount);

    tokenReward.transfer(beneficiary, tokens);
    TokenPurchase(msg.sender, beneficiary, weiAmount, tokens);
    forwardFunds();
  }

  // send ether to the fund collection wallet
  // override to create custom fund forwarding mechanisms
  function forwardFunds() internal {
    // wallet.transfer(msg.value);
    if (!wallet.send(msg.value)) {
      throw;
    }
  }

  // @return true if the transaction can buy tokens
  function validPurchase() internal constant returns (bool) {
    bool withinPeriod = started;
    bool nonZeroPurchase = msg.value != 0;
    return withinPeriod && nonZeroPurchase;
  }

  function withdrawTokens(uint256 _amount) {
    if(msg.sender!=wallet) throw;
    tokenReward.transfer(wallet,_amount);
  }
}
function forwardFunds() internal {
    // wallet.transfer(msg.value);
    if (!wallet.send(msg.value)) {
      throw;
    }
  }
// send ether to the fund collection wallet
// override to create custom fund forwarding mechanisms