pragma solidity ^0.4.11;
// Thanks to OpenZeppeline & TokenMarket for the awesome Libraries.
contract SafeMathLib {
  function safeMul(uint a, uint b) returns (uint) {
    uint c = a * b;
    assert(a == 0 || c / a == b);
    return c;
  }

  function safeSub(uint a, uint b) returns (uint) {
    assert(b <= a);
    return a - b;
  }

  function safeAdd(uint a, uint b) returns (uint) {
    uint c = a + b;
    assert(c>=a);
    return c;
  }
}

contract Ownable {
  address public owner;
  address public newOwner;
  event OwnershipTransferred(address indexed _from, address indexed _to);
  function Ownable() {
    owner = msg.sender;
  }
  modifier onlyOwner {
    require(msg.sender == owner);
    _;
  }
  function transferOwnership(address _newOwner) onlyOwner {
    newOwner = _newOwner;
  }

  function acceptOwnership() {
    require(msg.sender == newOwner);
    OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }
  
}

contract ERC20Basic {
  uint public totalSupply;
  function balanceOf(address who) constant returns (uint);
  function transfer(address _to, uint _value) returns (bool success);
  event Transfer(address indexed from, address indexed to, uint value);
}

contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender) constant returns (uint);
  function transferFrom(address _from, address _to, uint _value) returns (bool success);
  function approve(address _spender, uint _value) returns (bool success);
  event Approval(address indexed owner, address indexed spender, uint value);
}

contract FractionalERC20 is ERC20 {
  uint8 public decimals;
}

contract StandardToken is ERC20, SafeMathLib {
  /* Token supply got increased and a new owner received these tokens */
  event Minted(address receiver, uint amount);

  /* Actual balances of token holders */
  mapping(address => uint) balances;

  /* approve() allowances */
  mapping (address => mapping (address => uint)) allowed;

  function transfer(address _to, uint _value) returns (bool success) {
    if (balances[msg.sender] >= _value 
        && _value > 0 
        && balances[_to] + _value > balances[_to]
        ) {
      balances[msg.sender] = safeSub(balances[msg.sender],_value);
      balances[_to] = safeAdd(balances[_to],_value);
      Transfer(msg.sender, _to, _value);
      return true;
    }
    else{
      return false;
    }
    
  }

  function transferFrom(address _from, address _to, uint _value) returns (bool success) {
    uint _allowance = allowed[_from][msg.sender];

    if (balances[_from] >= _value   // From a/c has balance
        && _allowance >= _value    // Transfer approved
        && _value > 0              // Non-zero transfer
        && balances[_to] + _value > balances[_to]  // Overflow check
        ){
    balances[_to] = safeAdd(balances[_to],_value);
    balances[_from] = safeSub(balances[_from],_value);
    allowed[_from][msg.sender] = safeSub(_allowance,_value);
    Transfer(_from, _to, _value);
    return true;
        }
    else {
      return false;
    }
  }

  function balanceOf(address _owner) constant returns (uint balance) {
    return balances[_owner];
  }

  function approve(address _spender, uint _value) returns (bool success) {

    // To change the approve amount you first have to reduce the addresses`
    //  allowance to zero by calling `approve(_spender, 0)` if it is not
    //  already 0 to mitigate the race condition described here:
    //  https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
    require(!((_value != 0) && (allowed[msg.sender][_spender] != 0)));
    //if ((_value != 0) && (allowed[msg.sender][_spender] != 0)) throw;

    allowed[msg.sender][_spender] = _value;
    Approval(msg.sender, _spender, _value);
    return true;
  }

  function allowance(address _owner, address _spender) constant returns (uint remaining) {
    return allowed[_owner][_spender];
  }

}

/**
 * Upgrade agent interface inspired by Lunyr.
 *
 * Upgrade agent transfers tokens to a new contract.
 * Upgrade agent itself can be the token contract, or just a middle man contract doing the heavy lifting.
 */
contract UpgradeAgent {
  uint public originalSupply;
  /** Interface marker */
  function isUpgradeAgent() public constant returns (bool) {
    return true;
  }
  function upgradeFrom(address _from, uint256 _value) public;
}

/**
 * A token upgrade mechanism where users can opt-in amount of tokens to the next smart contract revision.
 *
 * First envisioned by Golem and Lunyr projects.
 */
contract UpgradeableToken is StandardToken {

  /** Contract / person who can set the upgrade path. This can be the same as team multisig wallet, as what it is with its default value. */
  address public upgradeMaster;

  /** The next contract where the tokens will be migrated. */
  UpgradeAgent public upgradeAgent;

  /** How many tokens we have upgraded by now. */
  uint256 public totalUpgraded;

  /**
   * Upgrade states.
   *
   * - NotAllowed: The child contract has not reached a condition where the upgrade can bgun
   * - WaitingForAgent: Token allows upgrade, but we don't have a new agent yet
   * - ReadyToUpgrade: The agent is set, but not a single token has been upgraded yet
   * - Upgrading: Upgrade agent is set and the balance holders can upgrade their tokens
   *
   */
  enum UpgradeState {Unknown, NotAllowed, WaitingForAgent, ReadyToUpgrade, Upgrading}

  /**
   * Somebody has upgraded some of his tokens.
   */
  event Upgrade(address indexed _from, address indexed _to, uint256 _value);

  /**
   * New upgrade agent available.
   */
  event UpgradeAgentSet(address agent);

  /**
   * Do not allow construction without upgrade master set.
   */
  function UpgradeableToken(address _upgradeMaster) {
    upgradeMaster = _upgradeMaster;
  }

  /**
   * Allow the token holder to upgrade some of their tokens to a new contract.
   */
  function upgrade(uint256 value) public {
    UpgradeState state = getUpgradeState();
    require((state == UpgradeState.ReadyToUpgrade || state == UpgradeState.Upgrading));
    // if(!(state == UpgradeState.ReadyToUpgrade || state == UpgradeState.Upgrading)) {
    //   // Called in a bad state
    //   throw;
    // }

    // Validate input value.
    if (value == 0) throw;

    balances[msg.sender] = safeSub(balances[msg.sender],value);

    // Take tokens out from circulation
    totalSupply = safeSub(totalSupply,value);
    totalUpgraded = safeAdd(totalUpgraded,value);

    // Upgrade agent reissues the tokens
    upgradeAgent.upgradeFrom(msg.sender, value);
    Upgrade(msg.sender, upgradeAgent, value);
  }

  /**
   * Set an upgrade agent that handles
   */
  function setUpgradeAgent(address agent) external {
    require(canUpgrade());
    // if(!canUpgrade()) {
    //   // The token is not yet in a state that we could think upgrading
    //   throw;
    // }

    require(agent != 0x0);
    //if (agent == 0x0) throw;
    // Only a master can designate the next agent
    require(msg.sender == upgradeMaster);
    //if (msg.sender != upgradeMaster) throw;
    // Upgrade has already begun for an agent
    require(getUpgradeState() != UpgradeState.Upgrading);
    //if (getUpgradeState() == UpgradeState.Upgrading) throw;

    upgradeAgent = UpgradeAgent(agent);

    // Bad interface
    require(upgradeAgent.isUpgradeAgent());
    //if(!upgradeAgent.isUpgradeAgent()) throw;
    // Make sure that token supplies match in source and target
    require(upgradeAgent.originalSupply() == totalSupply);
    //if (upgradeAgent.originalSupply() != totalSupply) throw;

    UpgradeAgentSet(upgradeAgent);
  }

  /**
   * Get the state of the token upgrade.
   */
  function getUpgradeState() public constant returns(UpgradeState) {
    if(!canUpgrade()) return UpgradeState.NotAllowed;
    else if(address(upgradeAgent) == 0x00) return UpgradeState.WaitingForAgent;
    else if(totalUpgraded == 0) return UpgradeState.ReadyToUpgrade;
    else return UpgradeState.Upgrading;
  }

  /**
   * Change the upgrade master.
   *
   * This allows us to set a new owner for the upgrade mechanism.
   */
  function setUpgradeMaster(address master) public {
    require(master != 0x0);
    //if (master == 0x0) throw;
    require(msg.sender == upgradeMaster);
    //if (msg.sender != upgradeMaster) throw;
    upgradeMaster = master;
  }

  /**
   * Child contract can enable to provide the condition when the upgrade can begun.
   */
  function canUpgrade() public constant returns(bool) {
     return true;
  }

}

/**
 * Define interface for releasing the token transfer after a successful crowdsale.
 */
contract ReleasableToken is ERC20, Ownable {

  /* The finalizer contract that allows unlift the transfer limits on this token */
  address public releaseAgent;

  /** A crowdsale contract can release us to the wild if ICO success. If false we are are in transfer lock up period.*/
  bool public released = false;

  /** Map of agents that are allowed to transfer tokens regardless of the lock down period. These are crowdsale contracts and possible the team multisig itself. */
  mapping (address => bool) public transferAgents;

  /**
   * Limit token transfer until the crowdsale is over.
   *
   */
  modifier canTransfer(address _sender) {

    if(!released) {
        require(transferAgents[_sender]);
        // if(!transferAgents[_sender]) {
        //     throw;
        // }
    }

    _;
  }

  /**
   * Set the contract that can call release and make the token transferable.
   *
   * Design choice. Allow reset the release agent to fix fat finger mistakes.
   */
  function setReleaseAgent(address addr) onlyOwner inReleaseState(false) public {

    // We don't do interface check here as we might want to a normal wallet address to act as a release agent
    releaseAgent = addr;
  }

  /**
   * Owner can allow a particular address (a crowdsale contract) to transfer tokens despite the lock up period.
   */
  function setTransferAgent(address addr, bool state) onlyOwner inReleaseState(false) public {
    transferAgents[addr] = state;
  }

  /**
   * One way function to release the tokens to the wild.
   *
   * Can be called only from the release agent that is the final ICO contract. It is only called if the crowdsale has been success (first milestone reached).
   */
  function releaseTokenTransfer() public onlyReleaseAgent {
    released = true;
  }

  /** The function can be called only before or after the tokens have been releasesd */
  modifier inReleaseState(bool releaseState) {
    require(releaseState == released);
    // if(releaseState != released) {
    //     throw;
    // }
    _;
  }

  /** The function can be called only by a whitelisted release agent. */
  modifier onlyReleaseAgent() {
    require(msg.sender == releaseAgent);
    // if(msg.sender != releaseAgent) {
    //     throw;
    // }
    _;
  }

  function transfer(address _to, uint _value) canTransfer(msg.sender) returns (bool success) {
    // Call StandardToken.transfer()
   return super.transfer(_to, _value);
  }

  function transferFrom(address _from, address _to, uint _value) canTransfer(_from) returns (bool success) {
    // Call StandardToken.transferForm()
    return super.transferFrom(_from, _to, _value);
  }

}

/**
 * A token that can increase its supply by another contract.
 *
 * This allows uncapped crowdsale by dynamically increasing the supply when money pours in.
 * Only mint agents, contracts whitelisted by owner, can mint new tokens.
 *
 */
contract MintableToken is StandardToken, Ownable {

  bool public mintingFinished = false;

  /** List of agents that are allowed to create new tokens */
  mapping (address => bool) public mintAgents;

  event MintingAgentChanged(address addr, bool state  );

  /**
   * Create new tokens and allocate them to an address..
   *
   * Only callably by a crowdsale contract (mint agent).
   */
  function mint(address receiver, uint amount) onlyMintAgent canMint public {
    totalSupply = safeAdd(totalSupply, amount);
    balances[receiver] = safeAdd(balances[receiver], amount);

    // This will make the mint transaction apper in EtherScan.io
    // We can remove this after there is a standardized minting event
    Transfer(0, receiver, amount);
  }

  /**
   * Owner can allow a crowdsale contract to mint new tokens.
   */
  function setMintAgent(address addr, bool state) onlyOwner canMint public {
    mintAgents[addr] = state;
    MintingAgentChanged(addr, state);
  }

  modifier onlyMintAgent() {
    // Only crowdsale contracts are allowed to mint new tokens
    require(mintAgents[msg.sender]);
    // if(!mintAgents[msg.sender]) {
    //     throw;
    // }
    _;
  }

  /** Make sure we are not done yet. */
  modifier canMint() {
    require(!mintingFinished);
    //if(mintingFinished) throw;
    _;
  }
}

/**
 * A crowdsaled token.
 *
 * An ERC-20 token designed specifically for crowdsales with investor protection and further development path.
 *
 * - The token transfer() is disabled until the crowdsale is over
 * - The token contract gives an opt-in upgrade path to a new contract
 * - The same token can be part of several crowdsales through approve() mechanism
 * - The token can be capped (supply set in the constructor) or uncapped (crowdsale contract can mint new tokens)
 *
 */
contract CrowdsaleToken is ReleasableToken, MintableToken, UpgradeableToken {

  event UpdatedTokenInformation(string newName, string newSymbol);

  string public name;

  string public symbol;

  uint8 public decimals;

  /**
   * Construct the token.
   *
   * This token must be created through a team multisig wallet, so that it is owned by that wallet.
   *
   * @param _name Token name
   * @param _symbol Token symbol - should be all caps
   * @param _initialSupply How many tokens we start with
   * @param _decimals Number of decimal places
   * @param _mintable Are new tokens created over the crowdsale or do we distribute only the initial supply? Note that when the token becomes transferable the minting always ends.
   */
  function CrowdsaleToken(string _name, string _symbol, uint _initialSupply, uint8 _decimals, bool _mintable)
    UpgradeableToken(msg.sender) {

    // Create any address, can be transferred
    // to team multisig via changeOwner(),
    // also remember to call setUpgradeMaster()
    owner = msg.sender;

    name = _name;
    symbol = _symbol;

    totalSupply = _initialSupply;

    decimals = _decimals;

    // Create initially all balance on the team multisig
    balances[owner] = totalSupply;

    if(totalSupply > 0) {
      Minted(owner, totalSupply);
    }

    // No more new supply allowed after the token creation
    if(!_mintable) {
      mintingFinished = true;
      require(totalSupply != 0);
      // if(totalSupply == 0) {
      //   throw; // Cannot create a token without supply and no minting
      // }
    }
  }

  /**
   * When token is released to be transferable, enforce no new tokens can be created.
   */
  function releaseTokenTransfer() public onlyReleaseAgent {
    mintingFinished = true;
    super.releaseTokenTransfer();
  }

  /**
   * Allow upgrade agent functionality kick in only if the crowdsale was success.
   */
  function canUpgrade() public constant returns(bool) {
    return released && super.canUpgrade();
  }

  /**
   * Owner can update token information here
   */
  function setTokenInformation(string _name, string _symbol) onlyOwner {
    name = _name;
    symbol = _symbol;
    UpdatedTokenInformation(name, symbol);
  }

}

/**
 * Finalize agent defines what happens at the end of succeseful crowdsale.
 *
 * - Allocate tokens for founders, bounties and community
 * - Make tokens transferable
 * - etc.
 */
contract FinalizeAgent {

  function isFinalizeAgent() public constant returns(bool) {
    return true;
  }

  /** Return true if we can run finalizeCrowdsale() properly.
   *
   * This is a safety check function that doesn't allow crowdsale to begin
   * unless the finalizer has been set up properly.
   */
  function isSane() public constant returns (bool);

  /** Called once by crowdsale finalize() if the sale was success. */
  function finalizeCrowdsale();

}

/**
 * Interface for defining crowdsale pricing.
 */
contract PricingStrategy {

  /** Interface declaration. */
  function isPricingStrategy() public constant returns (bool) {
    return true;
  }

  /** Self check if all references are correctly set.
   *
   * Checks that pricing strategy matches crowdsale parameters.
   */
  function isSane(address crowdsale) public constant returns (bool) {
    return true;
  }

  /**
   * When somebody tries to buy tokens for X eth, calculate how many tokens they get.
   *
   *
   * @param value - What is the value of the transaction send in as wei
   * @param tokensSold - how much tokens have been sold this far
   * @param weiRaised - how much money has been raised this far
   * @param msgSender - who is the investor of this transaction
   * @param decimals - how many decimal units the token has
   * @return Amount of tokens the investor receives
   */
  function calculatePrice(uint value, uint weiRaised, uint tokensSold, address msgSender, uint decimals) public constant returns (uint tokenAmount);
}

/*
 * Haltable
 *
 * Abstract contract that allows children to implement an
 * emergency stop mechanism. Differs from Pausable by causing a throw when in halt mode.
 *
 *
 * Originally envisioned in FirstBlood ICO contract.
 */
contract Haltable is Ownable {
  bool public halted;

  modifier stopInEmergency {
    require(!halted);
    //if (halted) throw;
    _;
  }

  modifier onlyInEmergency {
    require(halted);
    //if (!halted) throw;
    _;
  }

  // called by the owner on emergency, triggers stopped state
  function halt() external onlyOwner {
    halted = true;
  }

  // called by the owner on end of emergency, returns to normal state
  function unhalt() external onlyOwner onlyInEmergency {
    halted = false;
  }

}

/**
 * Abstract base contract for token sales.
 *
 * Handle
 * - start and end dates
 * - accepting investments
 * - minimum funding goal and refund
 * - various statistics during the crowdfund
 * - different pricing strategies
 * - different investment policies (require server side customer id, allow only whitelisted addresses)
 *
 */
contract Crowdsale is Haltable, SafeMathLib {

  /* Max investment count when we are still allowed to change the multisig address */
  uint public MAX_INVESTMENTS_BEFORE_MULTISIG_CHANGE = 5;

  /* The token we are selling */
  FractionalERC20 public token;

  /* How we are going to price our offering */
  PricingStrategy public pricingStrategy;

  /* Post-success callback */
  FinalizeAgent public finalizeAgent;

  /* tokens will be transfered from this address */
  address public multisigWallet;

  /* if the funding goal is not reached, investors may withdraw their funds */
  uint public minimumFundingGoal;

  /* the UNIX timestamp start date of the crowdsale */
  uint public startsAt;

  /* the UNIX timestamp end date of the crowdsale */
  uint public endsAt;

  /* the number of tokens already sold through this contract*/
  uint public tokensSold = 0;

  /* How many wei of funding we have raised */
  uint public weiRaised = 0;

  /* How many distinct addresses have invested */
  uint public investorCount = 0;

  /* How much wei we have returned back to the contract after a failed crowdfund. */
  uint public loadedRefund = 0;

  /* How much wei we have given back to investors.*/
  uint public weiRefunded = 0;

  /* Has this crowdsale been finalized */
  bool public finalized;

  /* Do we need to have unique contributor id for each customer */
  bool public requireCustomerId;

  /**
    * Do we verify that contributor has been cleared on the server side (accredited investors only).
    * This method was first used in FirstBlood crowdsale to ensure all contributors have accepted terms on sale (on the web).
    */
  bool public requiredSignedAddress;

  /* Server side address that signed allowed contributors (Ethereum addresses) that can participate the crowdsale */
  address public signerAddress;

  /** How much ETH each address has invested to this crowdsale */
  mapping (address => uint256) public investedAmountOf;

  /** How much tokens this crowdsale has credited for each investor address */
  mapping (address => uint256) public tokenAmountOf;

  /** Addresses that are allowed to invest even before ICO offical opens. For testing, for ICO partners, etc. */
  mapping (address => bool) public earlyParticipantWhitelist;

  /** This is for manul testing for the interaction from owner wallet. You can set it to any value and inspect this in blockchain explorer to see that crowdsale interaction works. */
  uint public ownerTestValue;

  /** State machine
   *
   * - Preparing: All contract initialization calls and variables have not been set yet
   * - Prefunding: We have not passed start time yet
   * - Funding: Active crowdsale
   * - Success: Minimum funding goal reached
   * - Failure: Minimum funding goal not reached before ending time
   * - Finalized: The finalized has been called and succesfully executed
   * - Refunding: Refunds are loaded on the contract for reclaim.
   */
  enum State{Unknown, Preparing, PreFunding, Funding, Success, Failure, Finalized, Refunding}

  // A new investment was made
  event Invested(address investor, uint weiAmount, uint tokenAmount, uint128 customerId);

  // Refund was processed for a contributor
  event Refund(address investor, uint weiAmount);

  // The rules were changed what kind of investments we accept
  event InvestmentPolicyChanged(bool requireCustomerId, bool requiredSignedAddress, address signerAddress);

  // Address early participation whitelist status changed
  event Whitelisted(address addr, bool status);

  // Crowdsale end time has been changed
  event EndsAtChanged(uint endsAt);

  function Crowdsale(address _token, PricingStrategy _pricingStrategy, address _multisigWallet, uint _start, uint _end, uint _minimumFundingGoal) {

    owner = msg.sender;

    token = FractionalERC20(_token);

    setPricingStrategy(_pricingStrategy);

    multisigWallet = _multisigWallet;
    require(multisigWallet != 0);
    // if(multisigWallet == 0) {
    //     throw;
    // }

    require(_start != 0);
    // if(_start == 0) {
    //     throw;
    // }

    startsAt = _start;

    require(_end != 0);
    // if(_end == 0) {
    //     throw;
    // }

    endsAt = _end;

    // Don't mess the dates
    require(startsAt < endsAt);
    // if(startsAt >= endsAt) {
    //     throw;
    // }

    // Minimum funding goal can be zero
    minimumFundingGoal = _minimumFundingGoal;
  }

  /**
   * Don't expect to just send in money and get tokens.
   */
  function() payable {
    throw;
  }

  /**
   * Make an investment.
   *
   * Crowdsale must be running for one to invest.
   * We must have not pressed the emergency brake.
   *
   * @param receiver The Ethereum address who receives the tokens
   * @param customerId (optional) UUID v4 to track the successful payments on the server side
   *
   */
  function investInternal(address receiver, uint128 customerId) stopInEmergency private {

    // Determine if it's a good time to accept investment from this participant
    if(getState() == State.PreFunding) {
      // Are we whitelisted for early deposit
      require(earlyParticipantWhitelist[receiver]);
      // if(!earlyParticipantWhitelist[receiver]) {
      //   throw;
      // }
    } else if(getState() == State.Funding) {
      // Retail participants can only come in when the crowdsale is running
      // pass
    } else {
      // Unwanted state
      throw;
    }

    uint weiAmount = msg.value;
    uint tokenAmount = pricingStrategy.calculatePrice(weiAmount, weiRaised, tokensSold, msg.sender, token.decimals());

    require(tokenAmount != 0);
    // if(tokenAmount == 0) {
    //   // Dust transaction
    //   throw;
    // }

    if(investedAmountOf[receiver] == 0) {
       // A new investor
       investorCount++;
    }

    // Update investor
    investedAmountOf[receiver] = safeAdd(investedAmountOf[receiver],weiAmount);
    tokenAmountOf[receiver] = safeAdd(tokenAmountOf[receiver],tokenAmount);

    // Update totals
    weiRaised = safeAdd(weiRaised,weiAmount);
    tokensSold = safeAdd(tokensSold,tokenAmount);

    // Check that we did not bust the cap
    require(!isBreakingCap(weiAmount, tokenAmount, weiRaised, tokensSold));
    // if(isBreakingCap(weiAmount, tokenAmount, weiRaised, tokensSold)) {
    //   throw;
    // }

    assignTokens(receiver, tokenAmount);

    // Pocket the money
    if(!multisigWallet.send(weiAmount)) throw;

    // Tell us invest was success
    Invested(receiver, weiAmount, tokenAmount, customerId);
  }

  /**
   * Preallocate tokens for the early investors.
   *
   * Preallocated tokens have been sold before the actual crowdsale opens.
   * This function mints the tokens and moves the crowdsale needle.
   *
   * Investor count is not handled; it is assumed this goes for multiple investors
   * and the token distribution happens outside the smart contract flow.
   *
   * No money is exchanged, as the crowdsale team already have received the payment.
   *
   * @param fullTokens tokens as full tokens - decimal places added internally
   * @param weiPrice Price of a single full token in wei
   *
   */
  function preallocate(address receiver, uint fullTokens, uint weiPrice) public onlyOwner {

    uint tokenAmount = fullTokens * 10**uint(token.decimals());
    uint weiAmount = weiPrice * fullTokens; // This can be also 0, we give out tokens for free

    weiRaised = safeAdd(weiRaised,weiAmount);
    tokensSold = safeAdd(tokensSold,tokenAmount);

    investedAmountOf[receiver] = safeAdd(investedAmountOf[receiver],weiAmount);
    tokenAmountOf[receiver] = safeAdd(tokenAmountOf[receiver],tokenAmount);

    assignTokens(receiver, tokenAmount);

    // Tell us invest was success
    Invested(receiver, weiAmount, tokenAmount, 0);
  }

  /**
   * Allow anonymous contributions to this crowdsale.
   */
  // function investWithSignedAddress(address addr, uint128 customerId, uint8 v, bytes32 r, bytes32 s) public payable {
  //    bytes32 hash = sha256(addr);
  //    if (ecrecover(hash, v, r, s) != signerAddress) throw;
  //    require(customerId != 0);
  //    //if(customerId == 0) throw;  // UUIDv4 sanity check
  //    investInternal(addr, customerId);
  // }

  /**
   * Track who is the customer making the payment so we can send thank you email.
   */
  function investWithCustomerId(address addr, uint128 customerId) public payable {
    require(!requiredSignedAddress);
    //if(requiredSignedAddress) throw; // Crowdsale allows only server-side signed participants
    
    require(customerId != 0);
    //if(customerId == 0) throw;  // UUIDv4 sanity check
    investInternal(addr, customerId);
  }

  /**
   * Allow anonymous contributions to this crowdsale.
   */
  function invest(address addr) public payable {
    require(!requireCustomerId);
    //if(requireCustomerId) throw; // Crowdsale needs to track partipants for thank you email
    
    require(!requiredSignedAddress);
    //if(requiredSignedAddress) throw; // Crowdsale allows only server-side signed participants
    investInternal(addr, 0);
  }

  /**
   * Invest to tokens, recognize the payer and clear his address.
   *
   */
  
  // function buyWithSignedAddress(uint128 customerId, uint8 v, bytes32 r, bytes32 s) public payable {
  //   investWithSignedAddress(msg.sender, customerId, v, r, s);
  // }

  /**
   * Invest to tokens, recognize the payer.
   *
   */
  function buyWithCustomerId(uint128 customerId) public payable {
    investWithCustomerId(msg.sender, customerId);
  }

  /**
   * The basic entry point to participate the crowdsale process.
   *
   * Pay for funding, get invested tokens back in the sender address.
   */
  function buy() public payable {
    invest(msg.sender);
  }

  /**
   * Finalize a succcesful crowdsale.
   *
   * The owner can triggre a call the contract that provides post-crowdsale actions, like releasing the tokens.
   */
  function finalize() public inState(State.Success) onlyOwner stopInEmergency {

    // Already finalized
    require(!finalized);
    // if(finalized) {
    //   throw;
    // }

    // Finalizing is optional. We only call it if we are given a finalizing agent.
    if(address(finalizeAgent) != 0) {
      finalizeAgent.finalizeCrowdsale();
    }

    finalized = true;
  }

  /**
   * Allow to (re)set finalize agent.
   *
   * Design choice: no state restrictions on setting this, so that we can fix fat finger mistakes.
   */
  function setFinalizeAgent(FinalizeAgent addr) onlyOwner {
    finalizeAgent = addr;

    // Don't allow setting bad agent
    require(finalizeAgent.isFinalizeAgent());
    // if(!finalizeAgent.isFinalizeAgent()) {
    //   throw;
    // }
  }

  /**
   * Set policy do we need to have server-side customer ids for the investments.
   *
   */
  function setRequireCustomerId(bool value) onlyOwner {
    requireCustomerId = value;
    InvestmentPolicyChanged(requireCustomerId, requiredSignedAddress, signerAddress);
  }

  /**
   * Set policy if all investors must be cleared on the server side first.
   *
   * This is e.g. for the accredited investor clearing.
   *
   */
  // function setRequireSignedAddress(bool value, address _signerAddress) onlyOwner {
  //   requiredSignedAddress = value;
  //   signerAddress = _signerAddress;
  //   InvestmentPolicyChanged(requireCustomerId, requiredSignedAddress, signerAddress);
  // }

  /**
   * Allow addresses to do early participation.
   *
   * TODO: Fix spelling error in the name
   */
  function setEarlyParicipantWhitelist(address addr, bool status) onlyOwner {
    earlyParticipantWhitelist[addr] = status;
    Whitelisted(addr, status);
  }

  /**
   * Allow crowdsale owner to close early or extend the crowdsale.
   *
   * This is useful e.g. for a manual soft cap implementation:
   * - after X amount is reached determine manual closing
   *
   * This may put the crowdsale to an invalid state,
   * but we trust owners know what they are doing.
   *
   */
  function setEndsAt(uint time) onlyOwner {

    if(now > time) {
      throw; // Don't change past
    }

    endsAt = time;
    EndsAtChanged(endsAt);
  }

  /**
   * Allow to (re)set pricing strategy.
   *
   * Design choice: no state restrictions on the set, so that we can fix fat finger mistakes.
   */
  function setPricingStrategy(PricingStrategy _pricingStrategy) onlyOwner {
    pricingStrategy = _pricingStrategy;

    // Don't allow setting bad agent
    require(pricingStrategy.isPricingStrategy());
    // if(!pricingStrategy.isPricingStrategy()) {
    //   throw;
    // }
  }

  /**
   * Allow to change the team multisig address in the case of emergency.
   *
   * This allows to save a deployed crowdsale wallet in the case the crowdsale has not yet begun
   * (we have done only few test transactions). After the crowdsale is going
   * then multisig address stays locked for the safety reasons.
   */
  function setMultisig(address addr) public onlyOwner {

    // Change
    if(investorCount > MAX_INVESTMENTS_BEFORE_MULTISIG_CHANGE) {
      throw;
    }

    multisigWallet = addr;
  }

  /**
   * Allow load refunds back on the contract for the refunding.
   *
   * The team can transfer the funds back on the smart contract in the case the minimum goal was not reached..
   */
  function loadRefund() public payable inState(State.Failure) {
    require(msg.value != 0);
    //if(msg.value == 0) throw;
    loadedRefund = safeAdd(loadedRefund,msg.value);
  }

  /**
   * Investors can claim refund.
   */
  function refund() public inState(State.Refunding) {
    uint256 weiValue = investedAmountOf[msg.sender];
    require(weiValue != 0);
    //if (weiValue == 0) throw;
    investedAmountOf[msg.sender] = 0;
    weiRefunded = safeAdd(weiRefunded,weiValue);
    Refund(msg.sender, weiValue);
    if (!msg.sender.send(weiValue)) throw;
  }

  /**
   * @return true if the crowdsale has raised enough money to be a succes
   */
  function isMinimumGoalReached() public constant returns (bool reached) {
    return weiRaised >= minimumFundingGoal;
  }

  /**
   * Check if the contract relationship looks good.
   */
  function isFinalizerSane() public constant returns (bool sane) {
    return finalizeAgent.isSane();
  }

  /**
   * Check if the contract relationship looks good.
   */
  function isPricingSane() public constant returns (bool sane) {
    return pricingStrategy.isSane(address(this));
  }

  /**
   * Crowdfund state machine management.
   *
   * We make it a function and do not assign the result to a variable, so there is no chance of the variable being stale.
   */
  function getState() public constant returns (State) {
    if(finalized) return State.Finalized;
    else if (address(finalizeAgent) == 0) return State.Preparing;
    else if (!finalizeAgent.isSane()) return State.Preparing;
    else if (!pricingStrategy.isSane(address(this))) return State.Preparing;
    else if (block.timestamp < startsAt) return State.PreFunding;
    else if (block.timestamp <= endsAt && !isCrowdsaleFull()) return State.Funding;
    else if (isMinimumGoalReached()) return State.Success;
    else if (!isMinimumGoalReached() && weiRaised > 0 && loadedRefund >= weiRaised) return State.Refunding;
    else return State.Failure;
  }

  /** This is for manual testing of multisig wallet interaction */
  function setOwnerTestValue(uint val) onlyOwner {
    ownerTestValue = val;
  }

  /** Interface marker. */
  function isCrowdsale() public constant returns (bool) {
    return true;
  }

  //
  // Modifiers
  //

  /** Modified allowing execution only if the crowdsale is currently running.  */
  modifier inState(State state) {
    require(getState() == state);
    //if(getState() != state) throw;
    _;
  }


  //
  // Abstract functions
  //

  /**
   * Check if the current invested breaks our cap rules.
   *
   *
   * The child contract must define their own cap setting rules.
   * We allow a lot of flexibility through different capping strategies (ETH, token count)
   * Called from invest().
   *
   * @param weiAmount The amount of wei the investor tries to invest in the current transaction
   * @param tokenAmount The amount of tokens we try to give to the investor in the current transaction
   * @param weiRaisedTotal What would be our total raised balance after this transaction
   * @param tokensSoldTotal What would be our total sold tokens count after this transaction
   *
   * @return true if taking this investment would break our cap rules
   */
  function isBreakingCap(uint weiAmount, uint tokenAmount, uint weiRaisedTotal, uint tokensSoldTotal) constant returns (bool limitBroken);
  /**
   * Check if the current crowdsale is full and we can no longer sell any tokens.
   */
  function isCrowdsaleFull() public constant returns (bool);

  /**
   * Create new tokens or transfer issued tokens to the investor depending on the cap model.
   */
  function assignTokens(address receiver, uint tokenAmount) private;
}

/**
 * At the end of the successful crowdsale allocate % bonus of tokens to the team.
 *
 * Unlock tokens.
 *
 * BonusAllocationFinal must be set as the minting agent for the MintableToken.
 *
 */
contract BonusFinalizeAgent is FinalizeAgent, SafeMathLib {

  CrowdsaleToken public token;
  Crowdsale public crowdsale;

  /** Total percent of tokens minted to the team at the end of the sale as base points (0.0001) */
  uint public totalMembers;
  uint public allocatedBonus;
  mapping (address=>uint) bonusOf;
  /** Where we move the tokens at the end of the sale. */
  address[] public teamAddresses;


  function BonusFinalizeAgent(CrowdsaleToken _token, Crowdsale _crowdsale, uint[] _bonusBasePoints, address[] _teamAddresses) {
    token = _token;
    crowdsale = _crowdsale;

    //crowdsale address must not be 0
    require(address(crowdsale) != 0);

    //bonus & team address array size must match
    require(_bonusBasePoints.length == _teamAddresses.length);

    totalMembers = _teamAddresses.length;
    teamAddresses = _teamAddresses;
    
    //if any of the bonus is 0 throw
    // otherwise sum it up in totalAllocatedBonus
    for (uint i=0;i<totalMembers;i++){
      require(_bonusBasePoints[i] != 0);
      //if(_bonusBasePoints[i] == 0) throw;
    }

    //if any of the address is 0 or invalid throw
    //otherwise initialize the bonusOf array
    for (uint j=0;j<totalMembers;j++){
      require(_teamAddresses[j] != 0);
      //if(_teamAddresses[j] == 0) throw;
      bonusOf[_teamAddresses[j]] = _bonusBasePoints[j];
    }
  }

  /* Can we run finalize properly */
  function isSane() public constant returns (bool) {
    return (token.mintAgents(address(this)) == true) && (token.releaseAgent() == address(this));
  }

  /** Called once by crowdsale finalize() if the sale was success. */
  function finalizeCrowdsale() {

    // if finalized is not being called from the crowdsale 
    // contract then throw
    require(msg.sender == address(crowdsale));

    // if(msg.sender != address(crowdsale)) {
    //   throw;
    // }

    // get the total sold tokens count.
    uint tokensSold = crowdsale.tokensSold();

    for (uint i=0;i<totalMembers;i++){
      allocatedBonus = safeMul(tokensSold, bonusOf[teamAddresses[i]]) / 10000;
      // move tokens to the team multisig wallet
      token.mint(teamAddresses[i], allocatedBonus);
    }

    // Make token transferable
    // realease them in the wild
    // Hell yeah!!! we did it.
    token.releaseTokenTransfer();
  }

}

/**
 * ICO crowdsale contract that is capped by amout of ETH.
 *
 * - Tokens are dynamically created during the crowdsale
 *
 *
 */
contract MintedEthCappedCrowdsale is Crowdsale {

  /* Maximum amount of wei this crowdsale can raise. */
  uint public weiCap;

  function MintedEthCappedCrowdsale(address _token, PricingStrategy _pricingStrategy, address _multisigWallet, uint _start, uint _end, uint _minimumFundingGoal, uint _weiCap) Crowdsale(_token, _pricingStrategy, _multisigWallet, _start, _end, _minimumFundingGoal) {
    weiCap = _weiCap;
  }

  /**
   * Called from invest() to confirm if the curret investment does not break our cap rule.
   */
  function isBreakingCap(uint weiAmount, uint tokenAmount, uint weiRaisedTotal, uint tokensSoldTotal) constant returns (bool limitBroken) {
    return weiRaisedTotal > weiCap;
  }

  function isCrowdsaleFull() public constant returns (bool) {
    return weiRaised >= weiCap;
  }

  /**
   * Dynamically create tokens and assign them to the investor.
   */
  function assignTokens(address receiver, uint tokenAmount) private {
    MintableToken mintableToken = MintableToken(token);
    mintableToken.mint(receiver, tokenAmount);
  }
}

/** Tranche based pricing with special support for pre-ico deals.
 *      Implementing "first price" tranches, meaning, that if byers order is
 *      covering more than one tranche, the price of the lowest tranche will apply
 *      to the whole order.
 */
contract EthTranchePricing is PricingStrategy, Ownable, SafeMathLib {

  uint public constant MAX_TRANCHES = 10;
 
 
  // This contains all pre-ICO addresses, and their prices (weis per token)
  mapping (address => uint) public preicoAddresses;

  /**
  * Define pricing schedule using tranches.
  */

  struct Tranche {
      // Amount in weis when this tranche becomes active
      uint amount;
      // How many tokens per wei you will get while this tranche is active
      uint price;
  }

  // Store tranches in a fixed array, so that it can be seen in a blockchain explorer
  // Tranche 0 is always (0, 0)
  // (TODO: change this when we confirm dynamic arrays are explorable)
  Tranche[10] public tranches;

  // How many active tranches we have
  uint public trancheCount;

  /// @dev Contruction, creating a list of tranches
  /// @param _tranches uint[] tranches Pairs of (start amount, price)
  function EthTranchePricing(uint[] _tranches) {
    // [ 0, 666666666666666,
    //   3000000000000000000000, 769230769230769,
    //   5000000000000000000000, 909090909090909,
    //   8000000000000000000000, 952380952380952,
    //   2000000000000000000000, 1000000000000000 ]
    // Need to have tuples, length check
    require(!(_tranches.length % 2 == 1 || _tranches.length >= MAX_TRANCHES*2));
    // if(_tranches.length % 2 == 1 || _tranches.length >= MAX_TRANCHES*2) {
    //   throw;
    // }
    trancheCount = _tranches.length / 2;
    uint highestAmount = 0;
    for(uint i=0; i<_tranches.length/2; i++) {
      tranches[i].amount = _tranches[i*2];
      tranches[i].price = _tranches[i*2+1];
      // No invalid steps
      require(!((highestAmount != 0) && (tranches[i].amount <= highestAmount)));
      // if((highestAmount != 0) && (tranches[i].amount <= highestAmount)) {
      //   throw;
      // }
      highestAmount = tranches[i].amount;
    }

    // We need to start from zero, otherwise we blow up our deployment
    require(tranches[0].amount == 0);
    // if(tranches[0].amount != 0) {
    //   throw;
    // }

    // Last tranche price must be zero, terminating the crowdale
    require(tranches[trancheCount-1].price == 0);
    // if(tranches[trancheCount-1].price != 0) {
    //   throw;
    // }
  }

  /// @dev This is invoked once for every pre-ICO address, set pricePerToken
  ///      to 0 to disable
  /// @param preicoAddress PresaleFundCollector address
  /// @param pricePerToken How many weis one token cost for pre-ico investors
  function setPreicoAddress(address preicoAddress, uint pricePerToken)
    public
    onlyOwner
  {
    preicoAddresses[preicoAddress] = pricePerToken;
  }

  /// @dev Iterate through tranches. You reach end of tranches when price = 0
  /// @return tuple (time, price)
  function getTranche(uint n) public constant returns (uint, uint) {
    return (tranches[n].amount, tranches[n].price);
  }

  function getFirstTranche() private constant returns (Tranche) {
    return tranches[0];
  }

  function getLastTranche() private constant returns (Tranche) {
    return tranches[trancheCount-1];
  }

  function getPricingStartsAt() public constant returns (uint) {
    return getFirstTranche().amount;
  }

  function getPricingEndsAt() public constant returns (uint) {
    return getLastTranche().amount;
  }

  function isSane(address _crowdsale) public constant returns(bool) {
    // Our tranches are not bound by time, so we can't really check are we sane
    // so we presume we are ;)
    // In the future we could save and track raised tokens, and compare it to
    // the Crowdsale contract.
    return true;
  }

  /// @dev Get the current tranche or bail out if we are not in the tranche periods.
  /// @param weiRaised total amount of weis raised, for calculating the current tranche
  /// @return {[type]} [description]
  function getCurrentTranche(uint weiRaised) private constant returns (Tranche) {
    uint i;
    for(i=0; i < tranches.length; i++) {
      if(weiRaised < tranches[i].amount) {
        return tranches[i-1];
      }
    }
  }

  /// @dev Get the current price.
  /// @param weiRaised total amount of weis raised, for calculating the current tranche
  /// @return The current price or 0 if we are outside trache ranges
  function getCurrentPrice(uint weiRaised) public constant returns (uint result) {
    return getCurrentTranche(weiRaised).price;
  }

  /// @dev Calculate the current price for buy in amount.
  function calculatePrice(uint value, uint weiRaised, uint tokensSold, address msgSender, uint decimals) public constant returns (uint) {

    uint multiplier = 10 ** decimals;

    // This investor is coming through pre-ico
    if(preicoAddresses[msgSender] > 0) {
      return safeMul(value, multiplier) / preicoAddresses[msgSender];
    }

    uint price = getCurrentPrice(weiRaised);
    
    return safeMul(value, multiplier) / price;
  }

  function() payable {
    throw; // No money on this contract
  }

}