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;
  }
}




contract ERC20Basic {
  function totalSupply() public view returns (uint256);
  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);
}




contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  uint256 totalSupply_;

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

  
  function transfer(address _to, uint256 _value) public returns (bool) {
    require(_to != address(0));
    require(_value <= balances[msg.sender]);

    
    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    Transfer(msg.sender, _to, _value);
    return true;
  }

  
  function balanceOf(address _owner) public view returns (uint256 balance) {
    return balances[_owner];
  }

}




contract BurnableToken is BasicToken {

  event Burn(address indexed burner, uint256 value);

  
  function burn(uint256 _value) public {
    require(_value <= balances[msg.sender]);
    
    

    address burner = msg.sender;
    balances[burner] = balances[burner].sub(_value);
    totalSupply_ = totalSupply_.sub(_value);
    Burn(burner, _value);
  }
}




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;
  }

}




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);
}




contract StandardToken is ERC20, BasicToken {

  mapping (address => mapping (address => uint256)) internal allowed;


  
  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;
  }

  
  function approve(address _spender, uint256 _value) public returns (bool) {
    allowed[msg.sender][_spender] = _value;
    Approval(msg.sender, _spender, _value);
    return true;
  }

  
  function allowance(address _owner, address _spender) public view returns (uint256) {
    return allowed[_owner][_spender];
  }

  
  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;
  }

}




contract MintableToken is StandardToken, Ownable {
  event Mint(address indexed to, uint256 amount);
  event MintFinished();

  bool public mintingFinished = false;


  modifier canMint() {
    require(!mintingFinished);
    _;
  }

  
  function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
    totalSupply_ = totalSupply_.add(_amount);
    balances[_to] = balances[_to].add(_amount);
    Mint(_to, _amount);
    Transfer(address(0), _to, _amount);
    return true;
  }

  
  function finishMinting() onlyOwner canMint public returns (bool) {
    mintingFinished = true;
    MintFinished();
    return true;
  }
}




contract Pausable is Ownable {
  event Pause();
  event Unpause();

  bool public paused = false;


  
  modifier whenNotPaused() {
    require(!paused);
    _;
  }

  
  modifier whenPaused() {
    require(paused);
    _;
  }

  
  function pause() onlyOwner whenNotPaused public {
    paused = true;
    Pause();
  }

  
  function unpause() onlyOwner whenPaused public {
    paused = false;
    Unpause();
  }
}




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);
  }
}



contract FlyCareToken is MintableToken, PausableToken, BurnableToken {

    string public constant name = "flyCARE Token";
    string public constant symbol = "FCC";
    uint8 public constant decimals = 18;

    function FlyCareToken() public {
        pause();
    }
}





contract Crowdsale {
  using SafeMath for uint256;

  
  ERC20 public token;

  
  address public wallet;

  
  uint256 public rate;

  
  uint256 public weiRaised;

  
  event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);

  
  function Crowdsale(uint256 _rate, address _wallet, ERC20 _token) public {
    require(_rate > 0);
    require(_wallet != address(0));
    require(_token != address(0));

    rate = _rate;
    wallet = _wallet;
    token = _token;
  }

  
  
  

  
  function () external payable {
    buyTokens(msg.sender);
  }

  
  function buyTokens(address _beneficiary) public payable {

    uint256 weiAmount = msg.value;
    _preValidatePurchase(_beneficiary, weiAmount);

    
    uint256 tokens = _getTokenAmount(weiAmount);

    
    weiRaised = weiRaised.add(weiAmount);

    _processPurchase(_beneficiary, tokens);
    TokenPurchase(msg.sender, _beneficiary, weiAmount, tokens);

    _updatePurchasingState(_beneficiary, weiAmount);

    _forwardFunds();
    _postValidatePurchase(_beneficiary, weiAmount);
  }

  
  
  

  
  function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal {
    require(_beneficiary != address(0));
    require(_weiAmount != 0);
  }

  
  function _postValidatePurchase(address _beneficiary, uint256 _weiAmount) internal {
    
  }

  
  function _deliverTokens(address _beneficiary, uint256 _tokenAmount) internal {
    token.transfer(_beneficiary, _tokenAmount);
  }

  
  function _processPurchase(address _beneficiary, uint256 _tokenAmount) internal {
    _deliverTokens(_beneficiary, _tokenAmount);
  }

  
  function _updatePurchasingState(address _beneficiary, uint256 _weiAmount) internal {
    
  }

  
  function _getTokenAmount(uint256 _weiAmount) internal view returns (uint256) {
    return _weiAmount.mul(rate);
  }

  
  function _forwardFunds() internal {
    wallet.transfer(msg.value);
  }
}




contract TokenCappedCrowdsale is Crowdsale {
    using SafeMath for uint256;

    uint256 public tokenSold;
    uint256 public tokenPresaleCap;
    uint256 public tokenPresaleSold;
    uint256 public saleStartTime;
    uint256 public totalTokenSaleCap;

    
    function TokenCappedCrowdsale(uint256 _tokenPresaleCap, uint256 _totalTokenSaleCap, uint256 _saleStartTime) public {
      require(_tokenPresaleCap > 0);
      require(_totalTokenSaleCap > 0);
      tokenPresaleCap = _tokenPresaleCap;
      saleStartTime = _saleStartTime;
      totalTokenSaleCap = _totalTokenSaleCap;
    }

    
    function tokenCapReached() public view returns (bool) {
      return tokenSold >= totalTokenSaleCap;
    }

    
    function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal {
        super._preValidatePurchase(_beneficiary, _weiAmount);
        
        uint256 tokenAmount = _getTokenAmount(_weiAmount);
        
	if (block.timestamp < saleStartTime) {
            require(tokenPresaleSold.add(tokenAmount) <= tokenPresaleCap);
        } else {
        
            require(tokenSold.add(tokenAmount) <= totalTokenSaleCap);
        }
    }

    
    function _processPurchase(address _beneficiary, uint256 _tokenAmount) internal {
        super._processPurchase(_beneficiary, _tokenAmount);
        
        
        tokenSold = tokenSold.add(_tokenAmount);
        
        if (block.timestamp < saleStartTime) {
            tokenPresaleSold = tokenPresaleSold.add(_tokenAmount);
        }
    }

}




contract TimedCrowdsale is Crowdsale {
  using SafeMath for uint256;

  uint256 public openingTime;
  uint256 public closingTime;

  
  modifier onlyWhileOpen {
    require(now >= openingTime && now <= closingTime);
    _;
  }

  
  function TimedCrowdsale(uint256 _openingTime, uint256 _closingTime) public {
    
    require(_closingTime >= _openingTime);

    openingTime = _openingTime;
    closingTime = _closingTime;
  }

  
  function hasClosed() public view returns (bool) {
    return now > closingTime;
  }
  
  
  function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal onlyWhileOpen {
    super._preValidatePurchase(_beneficiary, _weiAmount);
  }

}




contract FinalizableCrowdsale is TimedCrowdsale, Ownable {
  using SafeMath for uint256;

  bool public isFinalized = false;

  event Finalized();

  
  function finalize() onlyOwner public {
    require(!isFinalized);
    require(hasClosed());

    finalization();
    Finalized();

    isFinalized = true;
  }

  
  function finalization() internal {
  }
}




contract RefundVault is Ownable {
  using SafeMath for uint256;

  enum State { Active, Refunding, Closed }

  mapping (address => uint256) public deposited;
  address public wallet;
  State public state;

  event Closed();
  event RefundsEnabled();
  event Refunded(address indexed beneficiary, uint256 weiAmount);

  
  function RefundVault(address _wallet) public {
    require(_wallet != address(0));
    wallet = _wallet;
    state = State.Active;
  }

  
  function deposit(address investor) onlyOwner public payable {
    require(state == State.Active);
    deposited[investor] = deposited[investor].add(msg.value);
  }

  function close() onlyOwner public {
    require(state == State.Active);
    state = State.Closed;
    Closed();
    wallet.transfer(this.balance);
  }

  function enableRefunds() onlyOwner public {
    require(state == State.Active);
    state = State.Refunding;
    RefundsEnabled();
  }

  
  function refund(address investor) public {
    require(state == State.Refunding);
    uint256 depositedValue = deposited[investor];
    deposited[investor] = 0;
    investor.transfer(depositedValue);
    Refunded(investor, depositedValue);
  }
}




contract RefundableCrowdsale is FinalizableCrowdsale {
  using SafeMath for uint256;

  
  uint256 public goal;

  
  RefundVault public vault;

  
  function RefundableCrowdsale(uint256 _goal) public {
    require(_goal > 0);
    vault = new RefundVault(wallet);
    goal = _goal;
  }

  
  function claimRefund() public {
    require(isFinalized);
    require(!goalReached());

    vault.refund(msg.sender);
  }

  
  function goalReached() public view returns (bool) {
    return weiRaised >= goal;
  }

  
  function finalization() internal {
    if (goalReached()) {
      vault.close();
    } else {
      vault.enableRefunds();
    }

    super.finalization();
  }

  
  function _forwardFunds() internal {
    vault.deposit.value(msg.value)(msg.sender);
  }

}




contract MintedCrowdsale is Crowdsale {

  
  function _deliverTokens(address _beneficiary, uint256 _tokenAmount) internal {
    require(MintableToken(token).mint(_beneficiary, _tokenAmount));
  }
}




contract WhitelistedCrowdsale is Crowdsale, Ownable {

  mapping(address => bool) public whitelist;

  
  modifier isWhitelisted(address _beneficiary) {
    require(whitelist[_beneficiary]);
    _;
  }

  
  function addToWhitelist(address _beneficiary) external onlyOwner {
    whitelist[_beneficiary] = true;
  }
  
  
  function addManyToWhitelist(address[] _beneficiaries) external onlyOwner {
    for (uint256 i = 0; i < _beneficiaries.length; i++) {
      whitelist[_beneficiaries[i]] = true;
    }
  }

  
  function removeFromWhitelist(address _beneficiary) external onlyOwner {
    whitelist[_beneficiary] = false;
  }

  
  function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal isWhitelisted(_beneficiary) {
    super._preValidatePurchase(_beneficiary, _weiAmount);
  }

}



contract FlyCareTokenSale is RefundableCrowdsale, WhitelistedCrowdsale, TokenCappedCrowdsale, MintedCrowdsale, Pausable {
    using SafeMath for uint256;

    
    uint256 constant public RESERVE_AMOUNT = 70000000 * 10**18; 
    
    
    

    uint256 constant public MIN_INVESTMENT = 0.1 * 10**18; 

    
    uint64[5] private salePeriods;

    
    address public whitelister;

    
    event AddToWhitelist(address _beneficiary);

    function FlyCareTokenSale (
        address _whitelister,
        uint256 _startTime,
        uint256 _endTime,
        uint256 _rate,
        uint256 _goal,
        uint256 _presaleCap,
        uint256 _totalTokenSaleCap,
        address _wallet,
        uint64[5] _salePeriods
      ) public
      Crowdsale(_rate, _wallet, new FlyCareToken())
      TokenCappedCrowdsale(_presaleCap, _totalTokenSaleCap, _salePeriods[2])
      TimedCrowdsale(_startTime, _endTime)
      RefundableCrowdsale(_goal)
    {
        require(_goal.mul(_rate) <= _totalTokenSaleCap);
        require(_whitelister != address(0));

        for (uint8 i = 0; i < _salePeriods.length; i++) {
            require(_salePeriods[i] > 0);
        }
        salePeriods = _salePeriods;
        whitelister = _whitelister;
    }

    
    function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal {
        require(!paused);
        require(_weiAmount >= MIN_INVESTMENT);
        super._preValidatePurchase(_beneficiary, _weiAmount);
    }

    
    function getCurrentRate() public view returns (uint256) {
        uint256 time = now;
        if (time <= salePeriods[0]) {
            return 4031;
        }
        
        if (time <= salePeriods[1]) {
            return 3794;
        }

        if (time <= salePeriods[2]) {
            return 3583;
        }

        if (time <= salePeriods[3]) {
            return 3395;
        }

        if (time <= salePeriods[4]) {
            return 3225;
        }
        return rate;
    }

    
    function _getTokenAmount(uint256 _weiAmount) internal view returns (uint256) {
        uint256 currentRate = getCurrentRate();
        return currentRate.mul(_weiAmount);
    }

    
    function hasClosed() public view returns (bool) {
        return tokenCapReached() || super.hasClosed();
    }


    

    

    function setWhitelisterAddress(address _whitelister) external onlyOwner {
        require(_whitelister != address(0));
        whitelister = _whitelister;
    }

    
    modifier onlyWhitelister(){
        require(msg.sender == whitelister);
        _;
    }

    
    function addToWhitelist(address _beneficiary) external onlyWhitelister {
        whitelist[_beneficiary] = true;
        AddToWhitelist(_beneficiary);
    }

    
    function addManyToWhitelist(address[] _beneficiaries) external onlyWhitelister {
        for (uint256 i = 0; i < _beneficiaries.length; i++) {
            whitelist[_beneficiaries[i]] = true;
            AddToWhitelist(_beneficiaries[i]);
        }
    }

    
    function removeFromWhitelist(address _beneficiary) external onlyWhitelister {
        whitelist[_beneficiary] = false;
    }

    function finalization() internal {
        if (goalReached()) {
            if (!tokenCapReached()) {
                uint256 tokenUnsold = totalTokenSaleCap.sub(tokenSold);
                
                _deliverTokens(this, tokenUnsold);
                FlyCareToken(token).burn(tokenUnsold);
            }
          
            
            _deliverTokens(wallet, RESERVE_AMOUNT);

            
            require(FlyCareToken(token).finishMinting());
            FlyCareToken(token).unpause();
        }

        super.finalization();
    }

}