// SPDX-License-Identifier: MIT

pragma solidity ^0.8.16;

interface IERC20 {

function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}

library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a b;
require(c >= a, "SafeMath: addition overflow");

return c;
}

function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}

function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;

return c;
}

function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}

uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");

return c;
}

function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}

function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c a % b); // There is no case in which this doesn't hold

return c;
}

function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}

function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}

abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return payable(msg.sender);
}

function _msgData() internal view virtual returns (bytes memory) {
this;
return msg.data;
}
}

contract Ownable is Context {
address private _owner;

event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}

function owner() public view returns (address) {
return _owner;
}

modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}

function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}

function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}

interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);

function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IUniswapV2Router02 {
function factory() external pure returns (address);
function WETH() external pure returns (address);

function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);

function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;

function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
)
external payable;
}

interface IUniswapV2Pair {
function sync() external;
}

contract ShisaInu is Context, IERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public uniswapV2Router;

address public uniswapV2Pair;

mapping (address => uint256) private balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;

string private constant _name = "Shisa Inu";
string private constant _symbol = "SHIZI";
uint8 private constant _decimals = 9;
uint256 private _tTotal = 100_000_000* 10**_decimals;

uint256 public _maxWalletAmount = 500_000 * 10**_decimals;
uint256 public _maxTxAmount = 500_000 * 10**_decimals;
uint256 public swapTokenAtAmount = 250_000 * 10**_decimals;

uint256 public launchEpoch;
bool public launched;

address public liquidityReceiver;
address public marketingWallet = address(0x58E8F328964289fB7Cd9C7129550424B86D1F346);
address public bbWallet = address(0x41451f56A1bA9f2C461F413e442443E22e1298a6);

struct BuyFees{
uint256 liquidity;
uint256 marketing;
uint256 bb;

}

struct SellFees{
uint256 liquidity;
uint256 marketing;
uint256 bb;
}

BuyFees public buyFee;
SellFees public sellFee;

uint256 private liquidityFee;
uint256 private marketingFee;
uint256 private bbFee;


bool private swapping;
event SwapAndLiquify(uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiquidity);

bool private prePhase;
bool private phaseOne;
bool private phaseTwo;

constructor () {
balances[_msgSender()] = _tTotal;

buyFee.liquidity = 9;
buyFee.marketing = 12;
buyFee.bb = 1;

sellFee.liquidity = 9;
sellFee.marketing = 12;
sellFee.bb = 1;

IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x10ED43C718714eb63d5aA57B78B54704E256024E);
address _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());

uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = _uniswapV2Pair;

liquidityReceiver = msg.sender;
_isExcludedFromFee[msg.sender] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[address(0xdead)] = true;
_isExcludedFromFee[address(0x0000)] = true;

emit Transfer(address(0), _msgSender(), _tTotal);
}

function name() public pure returns (string memory) {
return _name;
}

function symbol() public pure returns (string memory) {
return _symbol;
}

function decimals() public pure returns (uint8) {
return _decimals;
}

function totalSupply() public view override returns (uint256) {
return _tTotal;
}

function balanceOf(address account) public view override returns (uint256) {
return balances[account];
}

function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}

function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}

function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}

function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()] - amount);
return true;
}

function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] addedValue);
return true;
}

function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] - subtractedValue);
return true;
}

receive() external payable {}

function takeBuyFees(uint256 amount, address from) private returns (uint256) {
uint256 liquidityFeeToken = amount * buyFee.liquidity / 100;
uint256 marketingFeeTokens = amount * buyFee.marketing / 100;
uint256 bbTokens = amount * buyFee.bb / 100;
balances[address(this)] = liquidityFeeToken marketingFeeTokens bbTokens;

emit Transfer (from, address(this), marketingFeeTokens liquidityFeeToken bbTokens);
return (amount -liquidityFeeToken -marketingFeeTokens -bbTokens);
}

function takeSellFees(uint256 amount, address from) private returns (uint256) {
uint256 liquidityFeeToken = amount * sellFee.liquidity / 100;
uint256 marketingFeeTokens = amount * sellFee.marketing / 100;
uint256 bbTokens = amount * sellFee.bb / 100;
balances[address(this)] = liquidityFeeToken marketingFeeTokens bbTokens;

emit Transfer (from, address(this), marketingFeeTokens liquidityFeeToken bbTokens);
return (amount -liquidityFeeToken -marketingFeeTokens -bbTokens);
}

function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}

function _approve(address owner, address spender, uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");

_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}

function _transfer(
address from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");

balances[from] -= amount;
uint256 transferAmount = amount;

bool takeFee;

if(!_isExcludedFromFee[from] && !_isExcludedFromFee[to]){
takeFee = true;
}

if(from == owner() && to == uniswapV2Pair) {
launchEpoch = block.timestamp;
launched = true;
}

if(launched && block.timestamp > launchEpoch 3 && !prePhase) {
buyFee.liquidity = 4;
buyFee.marketing = 5;
buyFee.bb = 1;

prePhase = true;
}

if(launched && block.timestamp > launchEpoch 1200 && !phaseOne) {
_maxWalletAmount = 1_000_000 * 10**_decimals;
_maxTxAmount = 1_000_000 * 10**_decimals;

sellFee.liquidity = 7;
sellFee.marketing = 8;
sellFee.bb = 1;

phaseOne = true;
}

if(launched && block.timestamp > launchEpoch 3600 && !phaseTwo) {
_maxWalletAmount = 2_000_000 * 10**_decimals;
_maxTxAmount = 2_000_000 * 10**_decimals;

sellFee.liquidity = 4;
sellFee.marketing = 5;
sellFee.bb = 1;

phaseTwo = true;
}

if(takeFee){
if(to != uniswapV2Pair){
require(amount <= _maxTxAmount, "Transfer Amount exceeds the maxTxAmount");
require(balanceOf(to) amount <= _maxWalletAmount, "Transfer amount exceeds the maxWalletAmount.");
transferAmount = takeBuyFees(amount, from);
}

if(from != uniswapV2Pair){
require(amount <= _maxTxAmount, "Transfer Amount exceeds the maxTxAmount");
transferAmount = takeSellFees(amount, from);

if (balanceOf(address(this)) >= swapTokenAtAmount && !swapping) {
swapping = true;
swapBack();
swapping = false;
}
}

if(to != uniswapV2Pair && from != uniswapV2Pair){
require(amount <= _maxTxAmount, "Transfer Amount exceeds the maxTxAmount");
require(balanceOf(to) amount <= _maxWalletAmount, "Transfer amount exceeds the maxWalletAmount.");
}
}

balances[to] = transferAmount;
emit Transfer(from, to, transferAmount);
}


function swapBack() private {
uint256 contractBalance = swapTokenAtAmount;
uint256 liquidityTokens = contractBalance * (buyFee.liquidity sellFee.liquidity) / (buyFee.marketing buyFee.liquidity buyFee.bb sellFee.marketing sellFee.liquidity sellFee.bb);
uint256 marketingTokens = contractBalance * (buyFee.marketing sellFee.marketing) / (buyFee.marketing buyFee.liquidity buyFee.bb sellFee.marketing sellFee.liquidity sellFee.bb);
uint256 bbTokens = contractBalance * (buyFee.bb sellFee.bb) / (buyFee.marketing buyFee.liquidity buyFee.bb sellFee.marketing sellFee.liquidity sellFee.bb);
uint256 totalTokensToSwap = liquidityTokens marketingTokens bbTokens;

uint256 tokensForLiquidity = liquidityTokens.div(2);
uint256 amountToSwapForETH = contractBalance.sub(tokensForLiquidity);

uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);

uint256 ethForLiquidity = ethBalance.mul(liquidityTokens).div(totalTokensToSwap);
uint256 ethForbb = ethBalance.mul(bbTokens).div(totalTokensToSwap);

addLiquidity(tokensForLiquidity, ethForLiquidity);
payable(bbWallet).transfer(ethForbb);
payable(marketingWallet).transfer(address(this).balance);
}

function swapTokensForEth(uint256 tokenAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();

_approve(address(this), address(uniswapV2Router), tokenAmount);

uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}

function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
_approve(address(this), address(uniswapV2Router), tokenAmount);

uniswapV2Router.addLiquidityETH {value: ethAmount} (
address(this),
tokenAmount,
0,
0,
liquidityReceiver,
block.timestamp
);
}
}