contract Math {
  function mul(uint a, uint b) internal returns (uint) {
    uint c = a * b;
    assert(a == 0 || c / a == b);
    return c;
  }

  function div(uint a, uint b) internal returns (uint) {
    assert(b > 0);
    uint c = a / b;
    assert(a == b * c + a % b);
    return c;
  }

  function sub(uint a, uint b) internal returns (uint) {
    assert(b <= a);
    return a - b;
  }

  function add(uint a, uint b) internal returns (uint) {
    uint c = a + b;
    assert(c >= a);
    return c;
  }

  function assert(bool assertion) internal {
    if (!assertion) {
      throw;
    }
  }
}
contract Token {
    /* This is a slight change to the ERC20 base standard.
    function totalSupply() constant returns (uint256 supply);
    is replaced with:
    uint256 public totalSupply;
    This automatically creates a getter function for the totalSupply.
    This is moved to the base contract since public getter functions are not
    currently recognised as an implementation of the matching abstract
    function by the compiler.
    */
    /// total amount of tokens
    uint256 public totalSupply;
    uint256 public totalDividends;
    uint public voteEnds = 1;
    /// @param _owner The address from which the balance will be retrieved
    /// @return The balance
    function balanceOf(address _owner) constant returns (uint256 balance);

    function voteBalance(address _owner) constant returns (uint256 balance);

    function voteCount(address _proposal) constant returns (uint256 count);

    /// @notice `msg.sender` approves `_spender` to spend `_value` tokens
    /// @param _spender The address of the account able to transfer the tokens
    /// @param _value The amount of tokens to be approved for transfer
    /// @return Whether the approval was successful or not
    function approve(address _spender, uint256 _value) returns (bool success);

    /// @param _owner The address of the account owning tokens
    /// @param _spender The address of the account able to transfer the tokens
    /// @return remaining of remaining tokens allowed to spent
    function allowance(address _owner, address _spender) constant returns (uint256 remaining);

    function transfer(address _to, uint256 _value) returns (bool success);

    /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
    /// @param _from The address of the sender
    /// @param _to The address of the recipient
    /// @param _value The amount of token to be transferred
    /// @return Whether the transfer was successful or not
    function transferFrom(address _from, address _to, uint256 _value) returns (bool success);

    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);

}

contract StandardToken is Token {

    struct Account {
        uint votes;
        uint lastVote;
        uint lastDividends;
    }

    modifier voteUpdater(address _to, address _from) {
        if (accounts[_from].lastVote == voteEnds) {
            if (accounts[_to].lastVote < voteEnds) {
                accounts[_to].votes = balances[_to];
                accounts[_to].lastVote = voteEnds;
            }
        } else if (accounts[_from].lastVote < voteEnds) {
            accounts[_from].votes = balances[_from];
            accounts[_from].lastVote = voteEnds;
            if (accounts[_to].lastVote < voteEnds) {
                accounts[_to].votes = balances[_to];
                accounts[_to].lastVote = voteEnds;
            }
        }
        _;

    }
    modifier updateAccount(address account) {
      var owing = dividendsOwing(account);
      if(owing > 0) {
        account.send(owing);
        accounts[account].lastDividends = totalDividends;
      }
      _;
    }
    function dividendsOwing(address account) internal returns(uint) {
      var newDividends = totalDividends - accounts[account].lastDividends;
      return (balances[account] * newDividends) / totalSupply;
    }
    function balanceOf(address _owner) constant returns (uint256 balance) {
        return balances[_owner];
    }
    function voteCount(address _proposal) constant returns (uint256 count) {
        return votes[_proposal];
    }
    function voteBalance(address _owner) constant returns (uint256 balance)
    {
        return accounts[_owner].votes;

    }
    function approve(address _spender, uint256 _value) returns (bool success) {
        allowed[msg.sender][_spender] = _value;
        Approval(msg.sender, _spender, _value);
        return true;
    }

    function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
      return allowed[_owner][_spender];
    }

    function transfer(address _to, uint256 _value) 
    updateAccount(msg.sender)
    updateAccount(_to)
    voteUpdater(_to, msg.sender)
    returns (bool success) 
    {
        //Default assumes totalSupply can't be over max (2^256 - 1).
        //If your token leaves out totalSupply and can issue more tokens as time goes on, you need to check if it doesn't wrap.
        //Replace the if with this one instead.
        //if (balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
        if (balances[msg.sender] >= _value && _value > 0) {
            balances[msg.sender] -= _value;
            balances[_to] += _value;
            Transfer(msg.sender, _to, _value);
            return true;
        } else { return false; }
    }

    function transferFrom(address _from, address _to, uint256 _value)
    updateAccount(_from)
    updateAccount(_to)  
    voteUpdater(_to, _from)
    returns (bool success) 
    {
        //same as above. Replace this line with the following if you want to protect against wrapping uints.
        //if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
        if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) {
            balances[_to] += _value;
            balances[_from] -= _value;
            allowed[_from][msg.sender] -= _value;
            Transfer(_from, _to, _value);
            return true;
        } else { return false; }
    }
    mapping (address => uint256) balances;
    mapping (address => mapping (address => uint256)) allowed;
    mapping (address => Account) accounts;
    mapping (address => uint ) votes;
}

contract SISA is StandardToken, Math {


	string constant public name = "SISA Token";
	string constant public symbol = "SISA";
	uint constant public decimals = 18;

	address public ico_tokens = 0x1111111111111111111111111111111111111111;
	address public preICO_tokens = 0x2222222222222222222222222222222222222222;
	address public bounty_funds;
	address public founder;
	address public admin;
	address public team_funds;
	address public issuer;
	address public preseller;





	function () payable {
	  totalDividends += msg.value;
	  //deduct(msg.sender, amount);
	}


	modifier onlyFounder() {
	    // Only founder is allowed to do this action.
	    if (msg.sender != founder) {
	        throw;
	    }
	    _;
	}
	modifier onlyAdmin() {
	    // Only admin is allowed to do this action.
	    if (msg.sender != admin) {
	        throw;
	    }
	    _;
	}
    modifier onlyIssuer() {
        // Only Issuer is allowed to proceed.
        if (msg.sender != issuer) {
            throw;
        }
        _;
    }


    function castVote(address proposal) 
    	public
    {
    	if (accounts[msg.sender].lastVote < voteEnds) {
    		accounts[msg.sender].votes = balances[msg.sender];
    		accounts[msg.sender].lastVote = voteEnds;

    	} else if (accounts[msg.sender].votes == 0 ) {
    		throw;
    	}
    	votes[proposal] = accounts[msg.sender].votes;
    	accounts[msg.sender].votes = 0;
    	
    }
    function callVote() 
    	public
    	onlyAdmin
    	returns (bool)
    {
    	voteEnds = now + 7 days;

    }
    function issueTokens(address _for, uint256 amount)
        public
        onlyIssuer
        returns (bool)
    {
        if(allowed[ico_tokens][issuer] >= amount) { 
            transferFrom(ico_tokens, _for, amount);

            // Issue(_for, msg.sender, amount);
            return true;
        } else {
            throw;
        }
    }
    function changePreseller(address newAddress)
        external
        onlyAdmin
        returns (bool)
    {    
        delete allowed[preICO_tokens][preseller];
        preseller = newAddress;

        allowed[preICO_tokens][preseller] = balanceOf(preICO_tokens);

        return true;
    }
    function changeIssuer(address newAddress)
        external
        onlyAdmin
        returns (bool)
    {    
        delete allowed[ico_tokens][issuer];
        issuer = newAddress;

        allowed[ico_tokens][issuer] = balanceOf(ico_tokens);

        return true;
    }
	function SISA(address _founder, address _admin, address _bounty, address _team) {
		founder = _founder;
		admin = _admin;
		bounty_funds = _bounty;
		team_funds = _team;
		totalSupply = 50000000 * 1 ether;
		balances[preICO_tokens] = 5000000 * 1 ether;
		balances[bounty_funds] += 3000000 * 1 ether;
		balances[team_funds] += 7000000 * 1 ether;
		balances[ico_tokens] = 32500000 * 1 ether;



	}

}