// Vulnerability label: TD1
pragma solidity ^0.4.25;
// ----------------------------------------------
// ----------------------------------------------
//===============================================
// =      Name : Prime Systems Token           =
// =      Symbol : PRIME                       =
// =      Total Supply : 15,000,000,000        =
// =      Decimals : 8                         =
// =      (c) by PrimeSystems Developers Team  =
// ==============================================
library SafeMath {
 /**
 * @dev Multiplies two numbers, throws on overflow.
 */
 function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
 if (a == 0) {
 return 0;
 }
 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 a / b;
 }
 /**
 * @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;
 }
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
 c = a + b;
 assert(c >= a);
 return c;
 }
}
contract ForeignToken {
 function balanceOf(address _owner) constant public returns (uint256);
 function transfer(address _to, uint256 _value) public returns (bool);
}
contract ERC20Basic {
 uint256 public totalSupply;
 function balanceOf(address who) public constant returns (uint256);
 function transfer(address to, uint256 value) public returns (bool);
 event Transfer(address indexed from, address indexed to, uint256 value);
}
contract ERC20 is ERC20Basic {
 function allowance(address owner, address spender) public constant 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);
}
contract PrimeSystems is ERC20 {
 
 using SafeMath for uint256;
 address owner = msg.sender;
 mapping (address => uint256) balances;
 mapping (address => mapping (address => uint256)) allowed;
 mapping (address => bool) public Claimed; 
 string public constant name = "Prime Systems Token";
 string public constant symbol = "PRIME";
 uint public constant decimals = 8;
 uint public deadline = now + 13 * 1 days;
 uint public round2 = now + 8 * 1 days;
 uint public round1 = now + 19 * 1 days;
 
 uint256 public totalSupply = 15000000000e8;
 uint256 public totalDistributed;
 uint256 public constant requestMinimum = 1 ether / 1000; // 0.001 Ether
 uint256 public tokensPerEth = 15500000e8;

uint public target0drop = 30000;
 uint public progress0drop = 0;
 
 ///
 address multisig = 0x8F4091071B52CeAf3676b471A24A329dFDC9f86d; 
 event Transfer(address indexed _from, address indexed _to, uint256 _value);
 event Approval(address indexed _owner, address indexed _spender, uint256 _value);
 
 event Distr(address indexed to, uint256 amount);
 event DistrFinished();
 
 event Airdrop(address indexed _owner, uint _amount, uint _balance);
 event TokensPerEthUpdated(uint _tokensPerEth);
 
 event Burn(address indexed burner, uint256 value);
 
 event Add(uint256 value);
 bool public distributionFinished = false;
 
 modifier canDistr() {
 require(!distributionFinished);
 _;
 }
 
 modifier onlyOwner() {
 require(msg.sender == owner);
 _;
 }
 
 constructor() public {
 uint256 teamFund = 10000000e8;
 owner = msg.sender;
 distr(owner, teamFund);
 }
 
 function transferOwnership(address newOwner) onlyOwner public {
 if (newOwner != address(0)) {
 owner = newOwner;
 }
 }
 function finishDistribution() onlyOwner canDistr public returns (bool) {
 distributionFinished = true;
 emit DistrFinished();

return true;
 }
 
 function distr(address _to, uint256 _amount) canDistr private returns (bool) {
 totalDistributed = totalDistributed.add(_amount); 
 balances[_to] = balances[_to].add(_amount);
 emit Distr(_to, _amount);
 emit Transfer(address(0), _to, _amount);
 return true;
 }
 
 function Distribute(address _participant, uint _amount) onlyOwner internal {
 require( _amount > 0 ); 
 require( totalDistributed < totalSupply );
 balances[_participant] = balances[_participant].add(_amount);
 totalDistributed = totalDistributed.add(_amount);
 if (totalDistributed >= totalSupply) {
 distributionFinished = true;
 }
 // log
 emit Airdrop(_participant, _amount, balances[_participant]);
 emit Transfer(address(0), _participant, _amount);
 }
 
 function DistributeAirdrop(address _participant, uint _amount) onlyOwner external { 
 Distribute(_participant, _amount);
 }
 function DistributeAirdropMultiple(address[] _addresses, uint _amount) onlyOwner external { 
 for (uint i = 0; i < _addresses.length; i++) Distribute(_addresses[i], _amount);
 }
 function updateTokensPerEth(uint _tokensPerEth) public onlyOwner { 
 tokensPerEth = _tokensPerEth;
 emit TokensPerEthUpdated(_tokensPerEth);
 }
 
 function () external payable {
 getTokens();
 }
 function getTokens() payable canDistr public {
 uint256 tokens = 0;
 uint256 bonus = 0;

uint256 countbonus = 0;
 uint256 bonusCond1 = 1 ether;
 uint256 bonusCond2 = 3 ether;
 uint256 bonusCond3 = 5 ether;
 uint256 bonusCond4 = 7 ether;
 uint256 bonusCond5 = 9 ether;
 uint256 bonusCond6 = 11 ether;
 uint256 bonusCond7 = 13 ether;
 tokens = tokensPerEth.mul(msg.value) / 1 ether; 
 address investor = msg.sender;
 if (msg.value >= requestMinimum && now < deadline && now < round1 && now < round2) {
 if(msg.value >= bonusCond1 && msg.value < bonusCond2){
 countbonus = tokens * 1 / 100;
 }else if(msg.value >= bonusCond2 && msg.value < bonusCond3){
 countbonus = tokens * 3 / 100;
 }else if(msg.value >= bonusCond3 && msg.value < bonusCond4){
 countbonus = tokens * 5 / 100;
 }else if(msg.value >= bonusCond4 && msg.value < bonusCond5){
 countbonus = tokens * 7 / 100;
 }else if(msg.value >= bonusCond5 && msg.value < bonusCond6){
 countbonus = tokens * 9 / 100;
 }else if(msg.value >= bonusCond6 && msg.value < bonusCond7){
 countbonus = tokens * 11 / 100;
 }else if(msg.value >= bonusCond7){
 countbonus = tokens * 13 / 100;
 }
 }else if(msg.value >= requestMinimum && now < deadline && now > round1 && now < round2){
 if(msg.value >= bonusCond1 && msg.value < bonusCond2){
 countbonus = tokens * 1 / 100;
 }else if(msg.value >= bonusCond2 && msg.value < bonusCond3){
 countbonus = tokens * 3 / 100;
 }else if(msg.value >= bonusCond3 && msg.value < bonusCond4){
 countbonus = tokens * 5 / 100;
 }else if(msg.value >= bonusCond4 && msg.value < bonusCond5){
 countbonus = tokens * 7 / 100;
 }else if(msg.value >= bonusCond5 && msg.value < bonusCond6){
 countbonus = tokens * 9 / 100;
 }else if(msg.value >= bonusCond6 && msg.value < bonusCond7){
 countbonus = tokens * 11 / 100;
 }else if(msg.value >= bonusCond7){
 countbonus = tokens * 13 / 100;
 }
 }else{
 countbonus = 0;
 }

bonus = tokens + countbonus;
 
 if (tokens == 0) {
 uint256 valdrop = 1000e8;
 if (Claimed[investor] == false && progress0drop <= target0drop ) {
 distr(investor, valdrop);
 Claimed[investor] = true;
 progress0drop++;
 }else{
 require( msg.value >= requestMinimum );
 }
 }else if(tokens > 0 && msg.value >= requestMinimum){
 if( now >= deadline && now >= round1 && now < round2){
 distr(investor, tokens);
 }else{
 if(msg.value >= bonusCond1){
 distr(investor, bonus);
 }else{
 distr(investor, tokens);
 } 
 }
 }else{
 require( msg.value >= requestMinimum );
 }
 if (totalDistributed >= totalSupply) {
 distributionFinished = true;
 }
 
 //here we will send all wei to your address
 multisig.transfer(msg.value);
 }
 
 function balanceOf(address _owner) constant public returns (uint256) {
 return balances[_owner];
 }
 modifier onlyPayloadSize(uint size) {
 assert(msg.data.length >= size + 4);
 _;
 }
 
 function transfer(address _to, uint256 _amount) onlyPayloadSize(2 * 32) public returns (bool success) 
{
 require(_to != address(0));
 require(_amount <= balances[msg.sender]);

balances[msg.sender] = balances[msg.sender].sub(_amount);
 balances[_to] = balances[_to].add(_amount);
 emit Transfer(msg.sender, _to, _amount);
 return true;
 }
 
 function transferFrom(address _from, address _to, uint256 _amount) onlyPayloadSize(3 * 32) public 
returns (bool success) {
 require(_to != address(0));
 require(_amount <= balances[_from]);
 require(_amount <= allowed[_from][msg.sender]);
 
 balances[_from] = balances[_from].sub(_amount);
 allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_amount);
 balances[_to] = balances[_to].add(_amount);
 emit Transfer(_from, _to, _amount);
 return true;
 }
 
 function approve(address _spender, uint256 _value) public returns (bool success) {
 if (_value != 0 && allowed[msg.sender][_spender] != 0) { return false; }
 allowed[msg.sender][_spender] = _value;
 emit Approval(msg.sender, _spender, _value);
 return true;
 }
 
 function allowance(address _owner, address _spender) constant public returns (uint256) {
 return allowed[_owner][_spender];
 }
 
 function getTokenBalance(address tokenAddress, address who) constant public returns (uint){
 ForeignToken t = ForeignToken(tokenAddress);
 uint bal = t.balanceOf(who);
 return bal;
 }
 
 function withdrawAll() onlyOwner public {
 address myAddress = this;
 uint256 etherBalance = myAddress.balance;
 owner.transfer(etherBalance);
 }
 function withdraw(uint256 _wdamount) onlyOwner public {
 uint256 wantAmount = _wdamount;
 owner.transfer(wantAmount);
 }

function burn(uint256 _value) onlyOwner public {
 require(_value <= balances[msg.sender]);
 address burner = msg.sender;
 balances[burner] = balances[burner].sub(_value);
 totalSupply = totalSupply.sub(_value);
 totalDistributed = totalDistributed.sub(_value);
 emit Burn(burner, _value);
 }
 
 function add(uint256 _value) onlyOwner public {
 uint256 counter = totalSupply.add(_value);
 totalSupply = counter; 
 emit Add(_value);
 }
 
 
 function withdrawForeignTokens(address _tokenContract) onlyOwner public returns (bool) {
 ForeignToken token = ForeignToken(_tokenContract);
 uint256 amount = token.balanceOf(address(this));
 return token.transfer(owner, amount);
 }
}