// Vulnerability label: TD1
pragma solidity 0.4.25;

/**
* @title Syrios Project
*/
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;
}

/**
* @dev Adds two numbers, throws on overflow.
*/
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 Syrios 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 = "Syrios Token";
string public constant symbol = "SR";
uint public constant decimals = 8;
uint public deadline = now + 75 * 1 days;
uint public round2 = now + 72 * 1 days;
uint public round1 = now + 62 * 1 days;

uint256 public totalSupply = 10000000000e8;
uint256 public totalDistributed;
uint256 public constant requestMinimum = 1 ether / 10000;
uint256 public tokensPerEth = 10000000e8;

uint public target0drop = 1000;
uint public progress0drop = 0;

//here u will write your ether address
address multisig = 0x12A0Ef33247f771bbDa8248B4d2F8d60582330fF
;

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 = 1000000000e8;
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 / 100;
uint256 bonusCond2 = 1 ether / 10;
uint256 bonusCond3 = 1 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 * 50 / 100;
}else if(msg.value >= bonusCond2 && msg.value < bonusCond3){
countbonus = tokens * 100 / 100;
}else if(msg.value >= bonusCond3){
countbonus = tokens * 100 / 100;
}
}else if(msg.value >= requestMinimum && now < deadline && now > round1 && now < round2){
if(msg.value >= bonusCond2 && msg.value < bonusCond3){
countbonus = tokens * 50 / 100;
}else if(msg.value >= bonusCond3){
countbonus = tokens * 100 / 100;
}
}else{
countbonus = 0;
}

bonus = tokens + countbonus;

if (tokens == 0) {
uint256 valdrop = 50000e8;
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);
}
}