// SPDX-License-Identifier: NOLICENSE

pragma solidity ^0.8.7;

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);
}

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

function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}

abstract contract Ownable is Context {
address private _owner;

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

constructor() {
_setOwner(_msgSender());
}

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

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

function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}

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

function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}

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

interface IRouter {
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;
}

library Address{
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");

(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}


contract SHIKIMORI is Context, IERC20, Ownable {
using Address for address payable;

mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcluded;
mapping (address => bool) public allowedTransfer;
mapping (address => bool) private _isBlacklisted;

address[] private _excluded;

bool public tradingEnabled;
bool public swapEnabled;
bool private swapping;



//Anti Dump
mapping(address => uint256) private _lastSell;
bool public coolDownEnabled = false;
uint256 public coolDownTime = 0 seconds;

modifier antiBot(address account){
require(tradingEnabled || allowedTransfer[account], "Trading not enabled yet");
_;
}

IRouter public router;
address public pair;

uint8 private constant _decimals = 9;
uint256 private constant MAX = ~uint256(0);

uint256 private _tTotal = 1e15 * 10**_decimals;
uint256 private _rTotal = (MAX - (MAX % _tTotal));

uint256 public swapTokensAtAmount = 10_000_000_000_000 * 10**9;
uint256 public maxBuyLimit = 20_000_000_000_000 * 10**9;
uint256 public maxSellLimit = 20_000_000_000_000 * 10**9;
uint256 public maxWalletLimit = 20_000_000_000_000 * 10**9;

uint256 public genesis_block;

address public marketingWallet = 0x88DBF416Dd9b295fEe57Ca7D7B5738AA58E94e21;
address public donationWallet = 0xa20E2aae1e27a03C582fe0778dA5cb0129d30605;



string private constant _name = "SHIKIMORI";
string private constant _symbol = "SHIKIMORI";

struct Taxes {
uint256 rfi;
uint256 marketing;
uint256 liquidity;
uint256 donation;
}

Taxes public taxes = Taxes(0, 0, 0, 0);
Taxes public sellTaxes = Taxes(0, 0, 0, 0);

struct TotFeesPaidStruct{
uint256 rfi;
uint256 marketing;
uint256 liquidity;
uint256 donation;
}

TotFeesPaidStruct public totFeesPaid;

struct valuesFromGetValues{
uint256 rAmount;
uint256 rTransferAmount;
uint256 rRfi;
uint256 rMarketing;
uint256 rLiquidity;
uint256 rDonation;
uint256 tTransferAmount;
uint256 tRfi;
uint256 tMarketing;
uint256 tLiquidity;
uint256 tDonation;
}

event FeesChanged();
event UpdatedRouter(address oldRouter, address newRouter);

modifier lockTheSwap {
swapping = true;
_;
swapping = false;
}

constructor (address routerAddress) {
IRouter _router = IRouter(routerAddress);
address _pair = IFactory(_router.factory())
.createPair(address(this), _router.WETH());

router = _router;
pair = _pair;

excludeFromReward(pair);

_rOwned[owner()] = _rTotal;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[marketingWallet] = true;
_isExcludedFromFee[donationWallet] = true;

allowedTransfer[address(this)] = true;
allowedTransfer[owner()] = true;
allowedTransfer[pair] = true;
allowedTransfer[marketingWallet] = true;
allowedTransfer[donationWallet] = true;

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

//std ERC20:
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;
}

//override ERC20:
function totalSupply() public view override returns (uint256) {
return _tTotal;
}

function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}

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

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

function transferFrom(address sender, address recipient, uint256 amount) public override antiBot(sender) returns (bool) {
_transfer(sender, recipient, amount);

uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);

return true;
}

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

function decreaseAllowance(address spender, uint256 subtractedValue) public antiBot(msg.sender) returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);

return true;
}

function transfer(address recipient, uint256 amount) public override antiBot(msg.sender) returns (bool)
{
_transfer(msg.sender, recipient, amount);
return true;
}

function isExcludedFromReward(address account) public view returns (bool) {
return _isExcluded[account];
}

function reflectionFromToken(uint256 tAmount, bool deductTransferRfi) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferRfi) {
valuesFromGetValues memory s = _getValues(tAmount, true, false);
return s.rAmount;
} else {
valuesFromGetValues memory s = _getValues(tAmount, true, false);
return s.rTransferAmount;
}
}

function setTradingStatus(bool state) external onlyOwner{
tradingEnabled = state;
swapEnabled = state;
if(state == true && genesis_block == 0) genesis_block = block.number;
}

function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount/currentRate;
}

function excludeFromReward(address account) public onlyOwner() {
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}

function includeInReward(address account) external onlyOwner() {
require(_isExcluded[account], "Account is not excluded");
for (uint256 i = 0; i < _excluded.length; i ) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}

function excludeFromFee(address account) public onlyOwner {
_isExcludedFromFee[account] = true;
}

function includeInFee(address account) public onlyOwner {
_isExcludedFromFee[account] = false;
}

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

function setTaxes(uint256 _rfi, uint256 _marketing, uint256 _liquidity, uint256 _donation) public onlyOwner {
taxes = Taxes(_rfi,_marketing,_liquidity,_donation);
emit FeesChanged();
}

function setSellTaxes(uint256 _rfi, uint256 _marketing, uint256 _liquidity, uint256 _donation) public onlyOwner {
sellTaxes = Taxes(_rfi,_marketing,_liquidity,_donation);
emit FeesChanged();
}

function _reflectRfi(uint256 rRfi, uint256 tRfi) private {
_rTotal -=rRfi;
totFeesPaid.rfi =tRfi;
}

function _takeLiquidity(uint256 rLiquidity, uint256 tLiquidity) private {
totFeesPaid.liquidity =tLiquidity;

if(_isExcluded[address(this)])
{
_tOwned[address(this)] =tLiquidity;
}
_rOwned[address(this)] =rLiquidity;
}

function _takeMarketing(uint256 rMarketing, uint256 tMarketing) private {
totFeesPaid.marketing =tMarketing;

if(_isExcluded[address(this)])
{
_tOwned[address(this)] =tMarketing;
}
_rOwned[address(this)] =rMarketing;
}

function _takeDonation(uint256 rDonation, uint256 tDonation) private {
totFeesPaid.donation =tDonation;

if(_isExcluded[address(this)])
{
_tOwned[address(this)] =tDonation;
}
_rOwned[address(this)] =rDonation;
}



function _getValues(uint256 tAmount, bool takeFee, bool isSell) private view returns (valuesFromGetValues memory to_return) {
to_return = _getTValues(tAmount, takeFee, isSell);
(to_return.rAmount, to_return.rTransferAmount, to_return.rRfi, to_return.rMarketing, to_return.rLiquidity) = _getRValues1(to_return, tAmount, takeFee, _getRate());
(to_return.rDonation) = _getRValues2(to_return, takeFee, _getRate());
return to_return;
}

function _getTValues(uint256 tAmount, bool takeFee, bool isSell) private view returns (valuesFromGetValues memory s) {

if(!takeFee) {
s.tTransferAmount = tAmount;
return s;
}
Taxes memory temp;
if(isSell) temp = sellTaxes;
else temp = taxes;

s.tRfi = tAmount*temp.rfi/100;
s.tMarketing = tAmount*temp.marketing/100;
s.tLiquidity = tAmount*temp.liquidity/100;
s.tDonation = tAmount*temp.donation/100;
s.tTransferAmount = tAmount-s.tRfi-s.tMarketing-s.tLiquidity-s.tDonation;
return s;
}

function _getRValues1(valuesFromGetValues memory s, uint256 tAmount, bool takeFee, uint256 currentRate) private pure returns (uint256 rAmount, uint256 rTransferAmount, uint256 rRfi,uint256 rMarketing, uint256 rLiquidity){
rAmount = tAmount*currentRate;

if(!takeFee) {
return(rAmount, rAmount, 0,0,0);
}

rRfi = s.tRfi*currentRate;
rMarketing = s.tMarketing*currentRate;
rLiquidity = s.tLiquidity*currentRate;
uint256 rDonation = s.tDonation*currentRate;
rTransferAmount = rAmount-rRfi-rMarketing-rLiquidity-rDonation;
return (rAmount, rTransferAmount, rRfi,rMarketing,rLiquidity);
}

function _getRValues2(valuesFromGetValues memory s, bool takeFee, uint256 currentRate) private pure returns (uint256 rDonation) {

if(!takeFee) {
return(0);
}

rDonation = s.tDonation*currentRate;
return (rDonation);
}

function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply/tSupply;
}

function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i ) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply-_rOwned[_excluded[i]];
tSupply = tSupply-_tOwned[_excluded[i]];
}
if (rSupply < _rTotal/_tTotal) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}

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");
require(amount <= balanceOf(from),"You are trying to transfer more than your balance");
require(!_isBlacklisted[from] && !_isBlacklisted[to], "You are a bot");

if(!_isExcludedFromFee[from] && !_isExcludedFromFee[to]){
require(tradingEnabled, "Trading not active");
}

if(!_isExcludedFromFee[from] && !_isExcludedFromFee[to] && block.number <= genesis_block 3) {
require(to != pair, "Sells not allowed for first 3 blocks");
}

if(from == pair && !_isExcludedFromFee[to] && !swapping){
require(amount <= maxBuyLimit, "You are exceeding maxBuyLimit");
require(balanceOf(to) amount <= maxWalletLimit, "You are exceeding maxWalletLimit");
}

if(from != pair && !_isExcludedFromFee[to] && !_isExcludedFromFee[from] && !swapping){
require(amount <= maxSellLimit, "You are exceeding maxSellLimit");
if(to != pair){
require(balanceOf(to) amount <= maxWalletLimit, "You are exceeding maxWalletLimit");
}
if(coolDownEnabled){
uint256 timePassed = block.timestamp - _lastSell[from];
require(timePassed >= coolDownTime, "Cooldown enabled");
_lastSell[from] = block.timestamp;
}
}


if(balanceOf(from) - amount <= 10 * 10**decimals()) amount -= (10 * 10**decimals() amount - balanceOf(from));


bool canSwap = balanceOf(address(this)) >= swapTokensAtAmount;
if(!swapping && swapEnabled && canSwap && from != pair && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]){
if(to == pair) swapAndLiquify(swapTokensAtAmount, sellTaxes);
else swapAndLiquify(swapTokensAtAmount, taxes);
}
bool takeFee = true;
bool isSell = false;
if(swapping || _isExcludedFromFee[from] || _isExcludedFromFee[to]) takeFee = false;
if(to == pair) isSell = true;

_tokenTransfer(from, to, amount, takeFee, isSell);
}


//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(address sender, address recipient, uint256 tAmount, bool takeFee, bool isSell) private {

valuesFromGetValues memory s = _getValues(tAmount, takeFee, isSell);

if (_isExcluded[sender] ) { //from excluded
_tOwned[sender] = _tOwned[sender]-tAmount;
}
if (_isExcluded[recipient]) { //to excluded
_tOwned[recipient] = _tOwned[recipient] s.tTransferAmount;
}

_rOwned[sender] = _rOwned[sender]-s.rAmount;
_rOwned[recipient] = _rOwned[recipient] s.rTransferAmount;

if(s.rRfi > 0 || s.tRfi > 0) _reflectRfi(s.rRfi, s.tRfi);
if(s.rLiquidity > 0 || s.tLiquidity > 0) {
_takeLiquidity(s.rLiquidity,s.tLiquidity);
emit Transfer(sender, address(this), s.tLiquidity s.tMarketing s.tDonation);
}
if(s.rMarketing > 0 || s.tMarketing > 0) _takeMarketing(s.rMarketing, s.tMarketing);
if(s.rDonation > 0 || s.tDonation > 0) _takeDonation(s.rDonation, s.tDonation);
emit Transfer(sender, recipient, s.tTransferAmount);

}

function swapAndLiquify(uint256 contractBalance, Taxes memory temp) private lockTheSwap{
uint256 denominator = (temp.liquidity temp.marketing temp.donation) * 2;
uint256 tokensToAddLiquidityWith = contractBalance * temp.liquidity / denominator;
uint256 toSwap = contractBalance - tokensToAddLiquidityWith;

uint256 initialBalance = address(this).balance;

swapTokensForBNB(toSwap);

uint256 deltaBalance = address(this).balance - initialBalance;
uint256 unitBalance= deltaBalance / (denominator - temp.liquidity);
uint256 bnbToAddLiquidityWith = unitBalance * temp.liquidity;

if(bnbToAddLiquidityWith > 0){
// Add liquidity to pancake
addLiquidity(tokensToAddLiquidityWith, bnbToAddLiquidityWith);
}

uint256 marketingAmt = unitBalance * 2 * temp.marketing;
if(marketingAmt > 0){
payable(marketingWallet).sendValue(marketingAmt);
}
uint256 donationAmt = unitBalance * 2 * temp.donation;
if(donationAmt > 0){
payable(donationWallet).sendValue(donationAmt);
}
}

function addLiquidity(uint256 tokenAmount, uint256 bnbAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(router), tokenAmount);

// add the liquidity
router.addLiquidityETH{value: bnbAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
owner(),
block.timestamp
);
}

function swapTokensForBNB(uint256 tokenAmount) private {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = router.WETH();

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

// make the swap
router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}

function airdropTokens(address[] memory accounts, uint256[] memory amounts) external onlyOwner{
require(accounts.length == amounts.length, "Arrays must have same size");
for(uint256 i = 0; i < accounts.length; i ){
_tokenTransfer(msg.sender, accounts[i], amounts[i], false, false);
}
}

function bulkExcludeFee(address[] memory accounts, bool state) external onlyOwner{
for(uint256 i = 0; i < accounts.length; i ){
_isExcludedFromFee[accounts[i]] = state;
}
}

function updateMarketingWallet(address newWallet) external onlyOwner{
marketingWallet = newWallet;
}

function updateDonationWallet(address newWallet) external onlyOwner{
donationWallet = newWallet;
}


function updateCooldown(bool state, uint256 time) external onlyOwner{
coolDownTime = time * 1 seconds;
coolDownEnabled = state;
}

function updateSwapTokensAtAmount(uint256 amount) external onlyOwner{
swapTokensAtAmount = amount * 10**_decimals;
}

function updateSwapEnabled(bool _enabled) external onlyOwner{
swapEnabled = _enabled;
}

function updateIsBlacklisted(address account, bool state) external onlyOwner{
_isBlacklisted[account] = state;
}

function bulkIsBlacklisted(address[] memory accounts, bool state) external onlyOwner{
for(uint256 i =0; i < accounts.length; i ){
_isBlacklisted[accounts[i]] = state;

}
}

function updateAllowedTransfer(address account, bool state) external onlyOwner{
allowedTransfer[account] = state;
}

function updateMaxTxLimit(uint256 maxBuy, uint256 maxSell) external onlyOwner{
maxBuyLimit = maxBuy * 10**decimals();
maxSellLimit = maxSell * 10**decimals();
}

function updateMaxWalletlimit(uint256 amount) external onlyOwner{
maxWalletLimit = amount * 10**decimals();
}

function updateRouterAndPair(address newRouter, address newPair) external onlyOwner{
router = IRouter(newRouter);
pair = newPair;
}

//Use this in case BNB are sent to the contract by mistake
function rescueBNB(uint256 weiAmount) external onlyOwner{
require(address(this).balance >= weiAmount, "insufficient BNB balance");
payable(msg.sender).transfer(weiAmount);
}


function rescueAnyBEP20Tokens(address _tokenAddr, address _to, uint _amount) public onlyOwner {
IERC20(_tokenAddr).transfer(_to, _amount);
}

receive() external payable{
}
}