// File: RPRGame.sol



/*
Implements EIP20 token standard: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
.*/


pragma solidity ^0.4.21;

import "./TokenInterface.sol";

contract GameToken is TokenInterface {

    uint256 constant private MAX_UINT256 = 2**256 - 1;
    mapping (address => uint256) public balances;
    mapping (address => mapping (address => uint256)) public allowed;
    /*
    NOTE:
    The following variables are OPTIONAL vanities. One does not have to include them.
    They allow one to customise the token contract & in no way influences the core functionality.
    Some wallets/interfaces might not even bother to look at this information.
    */
    string public name;                   //fancy name: eg Simon Bucks
    uint8 public decimals;                //How many decimals to show.
    string public symbol;                 //An identifier: eg SBX
    address public owner;
    uint256 public price;
    //uint public expDate;
    uint256 public increment_quantity = 0;    //increase price after this quantity hit
    uint256 public increment_price = 0;       //increase this amount to token price after quantity hit
    uint256 public current_batch_sold;    //track total token sold. reset this value while price increase
    uint256 qty_for_old_price = 0;
    uint256 qty_for_new_price = 0;
    uint256 roundInit = 1 hours;
    uint256 roundIncrease = 30 seconds;
    uint256 roundMax = 24 hours;
    uint256 timeStamp = now + roundInit;
    uint256 roundTimeStamp = now + roundMax;
    uint256 nonce;
    uint256[] player_list;
    uint256[] winner_list;
    string[] user_list;
    string[] uwinner_list;
    
    
    //event Sold(address buyer, uint256 amount);

    function GameToken(
        uint256 _initialAmount,
        string _tokenName,
        uint8 _decimalUnits,
        string _tokenSymbol,
        uint256 _price,
        uint256 _batch_sold
    ) public {
        balances[msg.sender] = _initialAmount;               // Give the creator all initial tokens
        totalSupply = _initialAmount;                        // Update total supply
        name = _tokenName;                                   // Set the name for display purposes
        decimals = _decimalUnits;                            // Amount of decimals for display purposes
        symbol = _tokenSymbol;                               // Set the symbol for display purposes
        owner = msg.sender;   
        price = _price;
        current_batch_sold = _batch_sold;
        increment_quantity = _initialAmount;
    }

    function transfer(address _to, uint256 _value) public returns (bool success) {
        require(balances[msg.sender] >= _value);
        balances[msg.sender] -= _value;
        balances[_to] += _value;
        emit Transfer(msg.sender, _to, _value); //solhint-disable-line indent, no-unused-vars
        return true;
    }

    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
        uint256 allowance = allowed[owner][_from];
        require(balances[_from] >= _value && allowance >= _value);
        balances[_to] += _value;
        balances[_from] -= _value;
        allowed[owner][_from] -= _value;
        emit Transfer(_from, _to, _value); //solhint-disable-line indent, no-unused-vars
        return true;
    }

    function balanceOf(address _owner) public view returns (uint256 balance) {
        return balances[_owner];
    }
    
    function tokenBalanceOf(address _owner) public constant returns (uint256 balance) {
        return balances[_owner];
    }

    function approve(address _spender, uint256 _value) public returns (bool success) {
        allowed[msg.sender][_spender] = _value;
        emit Approval(msg.sender, _spender, _value); //solhint-disable-line indent, no-unused-vars
        return true;
    }

    function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
        return allowed[_owner][_spender];
    }
    
    // Guards against integer overflows
    function safeMultiply(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        } else {
            uint256 c = a * b;
            assert(c / a == b);
            return c;
        }
    }
    
    //random pick winner from winner list 
    function pick_winner() public returns (uint256 rand_no) {
        uint256 random = uint256(keccak256(now, msg.sender, nonce)) % player_list.length;
        nonce++;
        winner_list.push(player_list[random]);
        delete player_list;
        return winner_list[random];
    }
    
    //random pick winner from winner list 
    function pick_uwinner() public returns (string rand_winner) {
        uint256 random = uint256(keccak256(now, msg.sender, nonce)) % user_list.length;
        nonce++;
        uwinner_list.push(user_list[random]);
        delete user_list;
        return uwinner_list[random];
    }
    
    //store player
    function store_player(uint256 _player) public returns (bool success){
        player_list.push(_player);
    }
    
    //store player name
    function store_player_username(string _player) public returns (bool success){
        user_list.push(_player);
    }
    
    //clear player list before round start
    function clear_user() public returns (bool success){
        delete user_list;
    }
    
    //clear player list before round start
    function clear_player() public returns (bool success){
        delete player_list;
    }
    
    //show current participate players for current round
    function get_player_list() public constant returns (uint256[] result){
        return player_list;
    }
    
    //show all winners 
    function get_winner_list() public constant returns (uint256[] result){
        return winner_list;
    }
    
    //get latest round winner 
    function get_current_round_winner() public constant returns (uint256 result){
        if(winner_list.length > 0){
            return winner_list[winner_list.length - 1];
        }else{
            return 0;
        }
    }
    
    function checking(uint256 _player) public returns (uint256[] result){
        winner_list.push(_player);
        return winner_list;
    }
}

// File: TokenInterface.sol



// Abstract contract for the full ERC 20 Token standard
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
pragma solidity ^0.4.21;


contract TokenInterface {
    /* 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;

    /// @param _owner The address from which the balance will be retrieved
    /// @return The balance
    function balanceOf(address _owner) public view returns (uint256 balance);

    /// @notice send `_value` token to `_to` from `msg.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 transfer(address _to, uint256 _value) public 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) public returns (bool success);

    /// @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) public 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 Amount of remaining tokens allowed to spent
    function allowance(address _owner, address _spender) public view returns (uint256 remaining);

    // solhint-disable-next-line no-simple-event-func-name
    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}