contract CoVEXTokenERC223 is ERC223Token{
    using SafeMath for uint256;

    string public name = "CoVEX Coin";
    string public symbol = "CoVEX";
    uint256 public decimals = 18;

    // 250M
    uint256 public totalSupply = 250*1000000 * (uint256(10) ** decimals);
    uint256 public totalRaised; // total ether raised (in wei)

    uint256 public startTimestamp; // timestamp after which ICO will start
    uint256 public durationSeconds; // 1 month= 1 * 30 * 24 * 60 * 60

    uint256 public maxCap;

    uint256 coinsPerETH;

    mapping(address => uint) etherBalance;

    mapping(uint => uint) public weeklyRewards;

    uint256 minPerUser = 0.1 ether;
    uint256 maxPerUser = 100 ether;

    /**
     * Address which will receive raised funds 
     * and owns the total supply of tokens
     */
    address public fundsWallet;

    function CoVEXTokenERC223() {
        fundsWallet = msg.sender;
        
        startTimestamp = now;
        durationSeconds = 0; //admin can set it later

        //initially assign all tokens to the fundsWallet
        balances[fundsWallet] = totalSupply;

        bytes memory empty;
        Transfer(0x0, fundsWallet, totalSupply, empty);

        // immediately transfer ether to fundsWallet
        fundsWallet.transfer(msg.value);
    }

    function() isIcoOpen checkMinMax payable{
        totalRaised = totalRaised.add(msg.value);

        uint256 tokenAmount = calculateTokenAmount(msg.value);
        balances[fundsWallet] = balances[fundsWallet].sub(tokenAmount);
        balances[msg.sender] = balances[msg.sender].add(tokenAmount);

        etherBalance[msg.sender] = etherBalance[msg.sender].add(msg.value);

        bytes memory empty;
        Transfer(fundsWallet, msg.sender, tokenAmount, empty);
    }

    function transfer(address _to, uint _value){
        return super.transfer(_to, _value);
    }

    function transfer(address _to, uint _value, bytes _data){
        return super.transfer(_to, _value, _data);   
    }

    function calculateTokenAmount(uint256 weiAmount) constant returns(uint256) {
        uint256 tokenAmount = weiAmount.mul(coinsPerETH);
        // setting rewards is possible only for 4 weeks
        for (uint i = 1; i <= 4; i++) {
            if (now <= startTimestamp + 7 days) {
                return tokenAmount.mul(100+weeklyRewards[i]).div(100);    
            }
        }
        return tokenAmount;
    }

    /**
     * @dev Burns a specific amount of tokens.
     * @param _value The amount of token to be burned.
     */
    function adminBurn(uint256 _value) public {
      require(_value <= balances[msg.sender]);
      // no need to require value <= totalSupply, since that would imply the
      // sender's balance is greater than the totalSupply, which *should* be an assertion failure
      address burner = msg.sender;
      balances[burner] = balances[burner].sub(_value);
      totalSupply = totalSupply.sub(_value);
      bytes memory empty;
      Transfer(burner, address(0), _value, empty);
    }

    function adminAddICO(uint256 _startTimestamp, uint256 _durationSeconds, 
        uint256 _coinsPerETH, uint256 _maxCap, uint _week1Rewards,
        uint _week2Rewards, uint _week3Rewards, uint _week4Rewards) isOwner{

        startTimestamp = _startTimestamp;
        durationSeconds = _durationSeconds;
        coinsPerETH = _coinsPerETH;
        maxCap = _maxCap * 1 ether;

        weeklyRewards[1] = _week1Rewards;
        weeklyRewards[2] = _week2Rewards;
        weeklyRewards[3] = _week3Rewards;
        weeklyRewards[4] = _week4Rewards;

        // reset totalRaised
        totalRaised = 0;
    }

    modifier isIcoOpen() {
        require(now >= startTimestamp);
        require(now <= (startTimestamp + durationSeconds));
        require(totalRaised <= maxCap);
        _;
    }

    modifier checkMinMax(){
      require(msg.value >= minPerUser);
      require(msg.value <= maxPerUser);
      _;
    }

    modifier isOwner(){
        require(msg.sender == fundsWallet);
        _;
    }
}
function adminBurn(uint256 _value) public {
      require(_value <= balances[msg.sender]);
      // no need to require value <= totalSupply, since that would imply the
      // sender's balance is greater than the totalSupply, which *should* be an assertion failure
      address burner = msg.sender;
      balances[burner] = balances[burner].sub(_value);
      totalSupply = totalSupply.sub(_value);
      bytes memory empty;
      Transfer(burner, address(0), _value, empty);
    }
/**
 * @dev Burns a specific amount of tokens.
 * @param _value The amount of token to be burned.
 */