pragma solidity ^0.4.13;

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_;

  /**
  * @dev total number of tokens in existence
  */
  function totalSupply() public view returns (uint256) {
    return totalSupply_;
  }

  /**
  * @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) {
    require(_to != address(0));
    require(_value <= balances[msg.sender]);

    // SafeMath.sub will throw if there is not enough balance.
    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    emit 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 view returns (uint256 balance) {
    return balances[_owner];
  }

}

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);
}

library SafeMath {

  /**
  * @dev Multiplies two numbers, throws on overflow.
  */
  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;
  }

  /**
  * @dev Integer division of two numbers, truncating the quotient.
  */
  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;
  }

  /**
  * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
  */
  function sub(uint256 a, uint256 b) internal pure returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  /**
  * @dev Adds two numbers, throws on overflow.
  */
  function add(uint256 a, uint256 b) internal pure returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }
}

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 {
    require(newOwner != address(0));
    emit OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}

contract Crowdsaled is Ownable {
        address public crowdsaleContract = address(0);
        function Crowdsaled() public {
        }

        modifier onlyCrowdsale{
          require(msg.sender == crowdsaleContract);
          _;
        }

        modifier onlyCrowdsaleOrOwner {
          require((msg.sender == crowdsaleContract) || (msg.sender == owner));
          _;
        }

        function setCrowdsale(address crowdsale) public onlyOwner() {
                crowdsaleContract = crowdsale;
        }
}

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);
    emit 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;
    emit 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);
    emit 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);
    }
    emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

}

contract LetItPlayToken is Crowdsaled, StandardToken {
        uint256 public totalSupply;
        string public name;
        string public symbol;
        uint8 public decimals;

        address public forSale;
        address public preSale;
        address public ecoSystemFund;
        address public founders;
        address public team;
        address public advisers;
        address public bounty;
        address public eosShareDrop;

        bool releasedForTransfer;

        uint256 private shift;

        //initial coin distribution
        function LetItPlayToken(
            address _forSale,
            address _ecoSystemFund,
            address _founders,
            address _team,
            address _advisers,
            address _bounty,
            address _preSale,
            address _eosShareDrop
          ) public {
          name = "LetItPlay Token";
          symbol = "PLAY";
          decimals = 8;
          shift = uint256(10)**decimals;
          totalSupply = 1000000000 * shift;
          forSale = _forSale;
          ecoSystemFund = _ecoSystemFund;
          founders = _founders;
          team = _team;
          advisers = _advisers;
          bounty = _bounty;
          eosShareDrop = _eosShareDrop;
          preSale = _preSale;

          balances[forSale] = totalSupply * 59 / 100;
          balances[ecoSystemFund] = totalSupply * 15 / 100;
          balances[founders] = totalSupply * 15 / 100;
          balances[team] = totalSupply * 5 / 100;
          balances[advisers] = totalSupply * 3 / 100;
          balances[bounty] = totalSupply * 1 / 100;
          balances[preSale] = totalSupply * 1 / 100;
          balances[eosShareDrop] = totalSupply * 1 / 100;
        }

        function transferByOwner(address from, address to, uint256 value) public onlyOwner {
          require(balances[from] >= value);
          balances[from] = balances[from].sub(value);
          balances[to] = balances[to].add(value);
          emit Transfer(from, to, value);
        }

        //can be called by crowdsale before token release, control over forSale portion of token supply
        function transferByCrowdsale(address to, uint256 value) public onlyCrowdsale {
          require(balances[forSale] >= value);
          balances[forSale] = balances[forSale].sub(value);
          balances[to] = balances[to].add(value);
          emit Transfer(forSale, to, value);
        }

        //can be called by crowdsale before token release, allowences is respected here
        function transferFromByCrowdsale(address _from, address _to, uint256 _value) public onlyCrowdsale returns (bool) {
            return super.transferFrom(_from, _to, _value);
        }

        //after the call token is available for exchange
        function releaseForTransfer() public onlyCrowdsaleOrOwner {
          require(!releasedForTransfer);
          releasedForTransfer = true;
        }

        //forbid transfer before release
        function transfer(address _to, uint256 _value) public returns (bool) {
          require(releasedForTransfer);
          return super.transfer(_to, _value);
        }

        //forbid transfer before release
        function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
           require(releasedForTransfer);
           return super.transferFrom(_from, _to, _value);
        }

        function burn(uint256 value) public  onlyOwner {
            require(value <= balances[msg.sender]);
            balances[msg.sender] = balances[msg.sender].sub(value);
            balances[address(0)] = balances[address(0)].add(value);
            emit Transfer(msg.sender, address(0), value);
        }
}