pragma solidity ^0.4.16;

/**
 * PornTokenV2 Crowd Sale
 */

interface token {
    function transfer(address receiver, uint amount);
}

contract PornTokenV2Crowdsale {
    address public beneficiary;
    uint public fundingGoal;
    uint public amountRaised;
    uint private currentBalance;
    uint public deadline;
    uint public price;
    uint public initialTokenAmount;
    uint public currentTokenAmount;
    token public tokenReward;
    mapping(address => uint256) public balanceOf;
    bool fundingGoalReached = false;
    bool crowdsaleClosed = false;

    event GoalReached(address recipient, uint totalAmountRaised);

    /**
     * Constrctor function
     *
     * Setup the owner
     */
    function PornTokenV2Crowdsale(
        address sendTo,
        uint fundingGoalInEthers,
        uint durationInMinutes,
        address addressOfTokenUsedAsReward
    ) {
        beneficiary = sendTo;
        fundingGoal = fundingGoalInEthers * 1 ether;
        deadline = now + durationInMinutes * 1 minutes;
        /* 0.00001337 x 1 ether in wei */
        price = 13370000000000;
        initialTokenAmount = 747943160;
        currentTokenAmount = 747943160;
        tokenReward = token(addressOfTokenUsedAsReward);
    }

    /**
     * Fallback function
     *
     * The function without name is the default function that is called whenever anyone sends funds to a contract
     */
    function () payable {
        require(!crowdsaleClosed);
        uint amount = msg.value;
        if (amount > 0) {
            balanceOf[msg.sender] += amount;
            amountRaised += amount;
            currentBalance += amount;
            uint tokenAmount = (amount / price) * 1 ether;
            currentTokenAmount -= tokenAmount;
            tokenReward.transfer(msg.sender, tokenAmount);
        }
    }

    /**
     * Bank tokens
     *
     * Deposit token sale proceeds to PornToken Account
     */
    function bank() public {
        if (beneficiary == msg.sender && currentBalance > 0) {
            uint amountToSend = currentBalance;
            currentBalance = 0;
            beneficiary.send(amountToSend);
        }
    }
    
    /**
     * Withdraw unusold tokens
     *
     * Deposit unsold tokens to PornToken Account
     */
    function returnUnsold() public {
        if (beneficiary == msg.sender) {
            tokenReward.transfer(beneficiary, currentTokenAmount);
        }
    }
    
    /**
     * Withdraw unusold tokens
     *
     * Deposit unsold tokens to PornToken Account 100k Safe
     */
    function returnUnsoldSafe() public {
        if (beneficiary == msg.sender) {
            uint tokenAmount = 100000;
            tokenReward.transfer(beneficiary, tokenAmount);
        }
    }

    modifier afterDeadline() { if (now >= deadline) _; }

    /**
     * Check if goal was reached
     *
     * Checks if the goal or time limit has been reached and ends the campaign
     */
    function checkGoalReached() afterDeadline {
        if (amountRaised >= fundingGoal){
            fundingGoalReached = true;
            GoalReached(beneficiary, amountRaised);
        }
        crowdsaleClosed = true;
    }


}