// Vulnerability label: UcC1
pragma solidity ^0.4.3;
contract Game{
    //创建者
    address founder;

    uint betPhase=6;

    uint commitPhase=6;

    uint openPhase=6;

    uint minValue=0.1 ether;



    uint refund=90;

    bool finished=true;

    uint startBlock;

    uint id=0;

    struct Participant{
        bytes32 hash;
        bytes32 origin;
        uint value;
        bool committed;
        bool returned;
    }




    struct Bet{
        uint betPhase;
        uint commitPhase;
        uint openPhase;
        uint minValue;

        mapping(address=>Participant) participants;
        address[] keys;
        uint totalValue;
        uint valiadValue;
        uint validUsers;
        bytes32 luckNumber;
        address lucky;
        bool prized;
        uint refund;
    }

    mapping(uint=>Bet) games;


    modifier checkGameFinish(){
        if(finished){
            throw;
        }
        _;
    }

    modifier checkFounder(){
        if(msg.sender!=founder){
            throw;
        }
        _;
    }

    modifier checkPrized(uint id){
        if(games[id].prized){
            throw;
        }
        _;
    }

    modifier checkFihished(){
        if(!finished){
            throw;
        }
        _;
    }

    modifier checkId(uint i){
        if(id!=i){
            throw;
        }
        _;
    }

    modifier checkValue(uint value){
        if(value<minValue){
            throw;
        }
        _;
    }

    modifier checkBetPhase(){
        if(block.number>startBlock+betPhase){
            throw;
        }
        _;
    }

    modifier checkCommitPhase(){
        if(block.number>startBlock+betPhase+commitPhase){
            throw;
        }
        _;
    }

    modifier checkOpen(){
        if(block.number<startBlock+betPhase+commitPhase){
            throw;
        }
        _;
    }

    modifier checkUser(address user,uint id){
        if(games[id].participants[user].hash==""){
            throw;
        }
        _;
    }

    modifier checkRegister(uint id,address user){
        if(games[id].participants[user].hash!=""){
            throw;
        }
        _;
    }

    function Game() public{
        founder=msg.sender;
    }

    event StartGame(uint indexed id,uint betPhase,uint commitPhase,uint openPhase,uint betValue,uint refund,uint startBlock);



    function startGame(uint iBetPhase,uint iCommitPhase,uint iOpenPhase,uint betvalue,uint iRefund)
    checkFounder
    checkFihished
    {
        id+=1;
        betPhase=iBetPhase;
        commitPhase=iCommitPhase;
        openPhase=iOpenPhase;
        minValue=(betvalue*1 ether)/100;
        finished=false;
        startBlock=block.number;
        refund=iRefund;
        StartGame(id,betPhase,commitPhase,openPhase,minValue,refund,startBlock);
    }

    // current total value,hash,id,sid
    event Play(uint indexed value,bytes32 hash,uint id,bytes32 sid,address player);

    function play(uint id,bytes32 hash,bytes32 sid) public payable
    checkValue(msg.value)
    checkBetPhase
    checkId(id)
    checkRegister(id,msg.sender)
    {
        address user=msg.sender;
        Bet memory tmp=games[id];
        Participant memory participant=Participant({hash:hash,origin:"",value:msg.value,committed:false,returned:false});
        uint value;
        if(tmp.keys.length==0){
            Bet storage bet=games[id];
            bet.betPhase=betPhase;
            bet.commitPhase=commitPhase;
            bet.openPhase=openPhase;
            bet.minValue=minValue;

            bet.keys.push(user);
            bet.participants[user]=participant;
            bet.refund=refund;
            bet.totalValue=msg.value;
            value=msg.value;
        }else{
            games[id].keys.push(user);
            games[id].participants[user]=participant;
            games[id].totalValue+=msg.value;
            value=msg.value;
        }
        var num=games[id].keys.length;
        Play(value,hash,id,sid,msg.sender);
    }
    // origin,valid users
    event CommitOrigin(address indexed user,bytes32 origin,uint num,bytes32 sid,uint id);

    function commitOrigin(uint id,bytes32 origin,bytes32 sid)
    checkCommitPhase
    checkId(id)
    checkUser(msg.sender,id)
    {
        bytes32 hash=games[id].participants[msg.sender].hash;
        if(sha3(origin)==hash){
            if(games[id].participants[msg.sender].committed!=true){
                games[id].participants[msg.sender].committed=true;
                games[id].participants[msg.sender].origin=origin;
                games[id].valiadValue+=games[id].participants[msg.sender].value;
                games[id].validUsers++;
                CommitOrigin(msg.sender,origin,games[id].validUsers,sid,id);
            }

        }else{
            throw;
        }
    }

    function getLuckNumber(Bet storage bet) internal
    returns(bytes32)
    {
        address[] memory users=bet.keys;
        bytes32 random;
        for(uint i=0;i<users.length;i++){
            address key=users[i];
            Participant memory p=bet.participants[key];

            if(p.committed==true){
                random ^=p.origin;
            }
        }
        return sha3(random);
    }

    // lucky user,lucky number,random number,prize
    event Open(address indexed user,bytes32 random,uint prize,uint id);

    function open(uint id)
    checkPrized(id)
    checkFounder
    checkOpen
    checkGameFinish
    {
        bytes32 max=0;
        Bet storage bet=games[id];
        bytes32 random=getLuckNumber(bet);
        address tmp;
        address[] memory users=bet.keys;
        for(uint i=0;i<users.length;i++){

            address key=users[i];
            Participant storage p=bet.participants[key];
            if(p.committed==true){
                bytes32 distance=random^p.origin;
                if(distance>max){
                    max=distance;
                    tmp=key;
                }
            }else{
                if(p.returned==false){
                    if(key.send(p.value*8/10)){
                        p.returned=true;
                    }

                }
            }

        }
        bet.lucky=tmp;
        bet.luckNumber=random;
        uint prize=bet.valiadValue*refund/100;

        founder.send((bet.valiadValue-prize));
        if(tmp.send(prize)){
            bet.prized=true;
            Open(tmp,random,prize,id);
        }

        finished=true;
    }

    function getContractBalance() constant returns(uint){
        return this.balance;
    }

    function withdraw(address user,uint value)
    checkFounder
    {
        user.send(value);
    }

    function getPlayerCommitted(uint period,address player) constant returns(bool){
        Participant memory p=games[period].participants[player];
        return p.committed;
    }

    function getPlayerReturned(uint period,address player) constant returns(bool){
        Participant memory p=games[period].participants[player];
        return p.returned;
    }

    function getPlayerNum(uint period) constant
    returns(uint){
        Bet bet=games[period];
        return bet.keys.length;
    }

    function getPlayerAddress(uint period,uint offset) constant
    returns(address){
        Bet bet=games[period];
        return bet.keys[offset];
    }

    function getPlayerOrigin(uint period,uint offset) constant
    returns(bytes32){
        Bet bet=games[period];
        address user=bet.keys[offset];
        return bet.participants[user].origin;
    }

    function getPlayerHash(uint period,uint offset) constant
    returns(bytes32){
        Bet bet=games[period];
        address user=bet.keys[offset];
        return bet.participants[user].hash;
    }

    function getPlayerValue(uint period,uint offset) constant
    returns(uint){
        Bet bet=games[period];
        address user=bet.keys[offset];
        return bet.participants[user].value;
    }

    // public getRandom(uint id) constant{

    // }
    function getId() constant returns(uint){
        return id;
    }

    function getRandom(uint id) constant
    checkId(id)
    returns(bytes32){
        return games[id].luckNumber;
    }

    function getLuckUser(uint id) constant
    checkId(id)
    returns(address){
        return games[id].lucky;
    }

    function getPrizeAmount(uint id) constant
    checkId(id)
    returns(uint){
        return games[id].totalValue;
    }

    function getMinAmount(uint id) constant
    checkId(id)
    returns(uint)
    {
        return minValue;
    }

    function getsha3(bytes32 x) constant
    returns(bytes32){
        return sha3(x);
    }

    function getGamePeriod() constant
    returns(uint){
        return id;
    }


    function getStartBlock() constant
    returns(uint){
        return startBlock;
    }

    function getBetPhase() constant
    returns(uint){
        return betPhase;
    }

    function getCommitPhase() constant
    returns(uint){
        return commitPhase;
    }

    function getFinished() constant
    returns(bool){
        return finished;
    }

}