// Contract: TheApeTimes
// Target function: function postStory(string calldata _title, string calldata _body, string calldata _subTitle, StoryType _storyType, string calldata _imageUrl)
} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue)
        public
        virtual
        returns (bool)
    {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue)
        public
        virtual
        returns (bool)
    {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(
            currentAllowance >= subtractedValue,
            "ERC20: decreased allowance below zero"
        );
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        require(from != address(0));
        require(to != address(0));

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount);
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);
    }

    function _mint(address to, uint256 amount) internal virtual {
        _totalSupply += amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            _balances[to] += amount;
        }

        emit Transfer(address(0), to, amount);
    }

    function _burn(address from, uint256 amount) internal virtual {
        _balances[from] -= amount;

        // Cannot underflow because a user's balance
        // will never be larger than the total supply.
        unchecked {
            _totalSupply -= amount;
        }

        emit Transfer(from, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount);
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }
}

interface IUniswapV2Factory {
    function createPair(address tokenA, address tokenB)
        external
        returns (address pair);
}

interface IUniswapV2Router01 {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (
            uint256 amountToken,
            uint256 amountETH,
            uint256 liquidity
        );
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
}

contract TheApeTimes is ERC20, Ownable {

    IUniswapV2Router02 public immutable uniswapV2Router;
    address public uniswapV2Pair;
    address public constant deadAddress = address(0xdead);

    bool private swapping;

    address public marketingWallet;
    address public liquidityWallet;

    uint256 public maxTransactionAmount;
    uint256 public swapTokensAtAmount;
    uint256 public maxWallet;

    bool public tradingActive = false;
    bool public swapEnabled = false;

    uint256 public buyTotalFees;
    uint256 private buyMarketingFee;
    uint256 private buyLiquidityFee;

    uint256 public sellTotalFees;
    uint256 private sellMarketingFee;
    uint256 private sellLiquidityFee;

    uint256 private tokensForMarketing;
    uint256 private tokensForLiquidity;
    uint256 private previousFee;

    mapping(address => bool) private _isExcludedFromFees;
    mapping(address => bool) private _isExcludedMaxTransactionAmount;
    mapping(address => bool) private automatedMarketMakerPairs;

    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiquidity
    );

    // BEGIN STORY

    enum StoryType {
        Cover,
        Column,
        Ad
    }

    struct StoryInfo {
        uint256 id;
        string title;
        string subTitle;
        string body;
        StoryType storyType;
        string imageUrl;
        uint256 publicationDate;
        uint256 price;
        address owner;
    }

    uint256 public constant MIN_STORY_PRICE = 10 ether; // base price for each story

    uint256 internal maxColumnStories = 5;

    uint256 internal maxAdStories = 4;

    mapping (uint256 => StoryInfo) public stories;

    uint256 public totalStories;

    uint256 public lastCoverStory;

    uint256[] public lastColumnStories;

    uint256[] public lastAdStories;

    event StoryPosted(
        uint256 id,
        string title,
        string subTitle,
        string body,
        StoryType storyType,
        string imageUrl,
        uint256 publicationDate,
        uint256 price,
        address owner
    );

    // END POST    

    constructor() payable ERC20("TheApeTimes", "TIMES") {
        uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        _approve(address(this), address(uniswapV2Router), type(uint256).max);

        uint256 totalSupply = 10_000_000 ether;

        maxTransactionAmount = (totalSupply * 10) / 1000;
        maxWallet = (totalSupply * 10) / 1000;
        swapTokensAtAmount = (totalSupply * 1) / 1000;

        buyMarketingFee = 15;
        buyLiquidityFee = 0;
        buyTotalFees = buyMarketingFee + buyLiquidityFee;

        sellMarketingFee = 30;
        sellLiquidityFee = 0;
        sellTotalFees =
            sellMarketingFee +
            sellLiquidityFee;

        previousFee = sellTotalFees;

        marketingWallet = _msgSender();
        liquidityWallet = _msgSender();

        excludeFromFees(_msgSender(), true);
        excludeFromFees(address(this), true);
        excludeFromFees(deadAddress, true);
        excludeFromFees(marketingWallet, true);
        excludeFromFees(liquidityWallet, true);

        excludeFromMaxTransaction(_msgSender(), true);
        excludeFromMaxTransaction(address(this), true);
        excludeFromMaxTransaction(deadAddress, true);
        excludeFromMaxTransaction(address(uniswapV2Router), true);
        excludeFromMaxTransaction(marketingWallet, true);
        excludeFromMaxTransaction(liquidityWallet, true);

        _mint(msg.sender, (totalSupply * 100) / 100);
    }

    receive() external payable {}

    function burn(uint256 amount) external {
        _burn(msg.sender, amount);
    }

    function createPair() external onlyOwner {
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(
            address(this),
            uniswapV2Router.WETH()
        );
        _setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
        excludeFromMaxTransaction(address(uniswapV2Pair), true);
    }

    function openTrading() external onlyOwner {
        require(!tradingActive);
        tradingActive = true;
        swapEnabled = true;
    }

    function updateSwapTokensAtAmount(uint256 newAmount)
        external
        onlyOwner
        returns (bool)
    {
        require(newAmount >= (totalSupply() * 1) / 100000);
        require(newAmount <= (totalSupply() * 5) / 1000);
        swapTokensAtAmount = newAmount;
        return true;
    }

    function updateMaxWalletAndTxnAmount(
        uint256 newTxnNum,
        uint256 newMaxWalletNum
    ) external onlyOwner {
        require(newTxnNum >= ((totalSupply() * 5) / 1000));
        require(newMaxWalletNum >= ((totalSupply() * 5) / 1000));
        maxWallet = newMaxWalletNum;
        maxTransactionAmount = newTxnNum;
    }

    function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner
    {
        _isExcludedMaxTransactionAmount[updAds] = isEx;
    }

    function updateBuyFees(
        uint256 _marketingFee,
        uint256 _liquidityFee
    ) external onlyOwner {
        buyMarketingFee = _marketingFee;
        buyLiquidityFee = _liquidityFee;
        buyTotalFees = buyMarketingFee + buyLiquidityFee;
        require(buyTotalFees <= 15);
    }

    function updateSellFees(
        uint256 _marketingFee,
        uint256 _liquidityFee
    ) external onlyOwner {
        sellMarketingFee = _marketingFee;
        sellLiquidityFee = _liquidityFee;
        sellTotalFees = sellMarketingFee + sellLiquidityFee;
        previousFee = sellTotalFees;
        require(sellTotalFees <= 30);
    }

    function excludeFromFees(address account, bool excluded) public onlyOwner {
        _isExcludedFromFees[account] = excluded;
    }

    function withdrawStuckETH() public onlyOwner {
        bool success;
        (success, ) = address(msg.sender).call{value: address(this).balance}(
            ""
        );
    }

    function withdrawStuckTokens(address tkn) public onlyOwner {
        require(IERC20(tkn).balanceOf(address(this)) > 0);
        uint256 amount = IERC20(tkn).balanceOf(address(this));
        IERC20(tkn).transfer(msg.sender, amount);
    }

    function _setAutomatedMarketMakerPair(address pair, bool value) private {
        automatedMarketMakerPairs[pair] = value;
    }

    function isExcludedFromFees(address account) public view returns (bool) {
        return _isExcludedFromFees[account];
    }

    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal override {
        require(from != address(0));
        require(to != address(0));

        if (amount == 0) {
            super._transfer(from, to, 0);
            return;
        }

        if (
            from != owner() &&
            to != owner() &&
            to != address(0) &&
            to != deadAddress &&
            !swapping
        ) {
            if (!tradingActive) {
                require(_isExcludedFromFees[from] || _isExcludedFromFees[to]);
            }

            //when buy
            if (
                automatedMarketMakerPairs[from] &&
                !_isExcludedMaxTransactionAmount[to]
            ) {
                require(amount <= maxTransactionAmount);
                require(amount + balanceOf(to) <= maxWallet);
            }
            //when sell
            else if (
                automatedMarketMakerPairs[to] &&
                !_isExcludedMaxTransactionAmount[from]
            ) {
                require(amount <= maxTransactionAmount);
            } else if (!_isExcludedMaxTransactionAmount[to]) {
                require(amount + balanceOf(to) <= maxWallet);
            }
        }

        uint256 contractTokenBalance = balanceOf(address(this));

        bool canSwap = contractTokenBalance >= swapTokensAtAmount;

        if (
            canSwap &&
            swapEnabled &&
            !swapping &&
            !automatedMarketMakerPairs[from] &&
            !_isExcludedFromFees[from] &&
            !_isExcludedFromFees[to]
        ) {
            swapping = true;

            swapBack();

            swapping = false;
        }

        bool takeFee = !swapping;

        if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
            takeFee = false;
        }

        uint256 fees = 0;

        if (takeFee) {
            // on sell
            if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
                fees = amount * sellTotalFees / 100;
                tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
                tokensForMarketing += (fees * sellMarketingFee) / sellTotalFees;
            }
            // on buy
            else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
                fees = amount * buyTotalFees / 100;
                tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
                tokensForMarketing += (fees * buyMarketingFee) / buyTotalFees;
            }

            if (fees > 0) {
                super._transfer(from, address(this), fees);
            }

            amount -= fees;
        }

        super._transfer(from, to, amount);
        sellTotalFees = previousFee;
    }

    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);

        // make the swap
        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,
            liquidityWallet,
            block.timestamp
        );
    }

    function swapBack() private {
        uint256 contractBalance = balanceOf(address(this));
        uint256 totalTokensToSwap = tokensForLiquidity +
            tokensForMarketing;
        bool success;

        if (contractBalance == 0 || totalTokensToSwap == 0) {
            return;
        }

        if (contractBalance > swapTokensAtAmount * 20) {
            contractBalance = swapTokensAtAmount * 20;
        }

        uint256 liquidityTokens = (contractBalance * tokensForLiquidity) /
            totalTokensToSwap /
            2;
        uint256 amountToSwapForETH = contractBalance - liquidityTokens;

        uint256 initialETHBalance = address(this).balance;

        swapTokensForEth(amountToSwapForETH);

        uint256 ethBalance = address(this).balance - initialETHBalance;

        uint256 ethForMarketing = ethBalance * tokensForMarketing / totalTokensToSwap;

        uint256 ethForLiquidity = ethBalance - ethForMarketing;

        tokensForLiquidity = 0;
        tokensForMarketing = 0;

        if (liquidityTokens > 0 && ethForLiquidity > 0) {
            addLiquidity(liquidityTokens, ethForLiquidity);
            emit SwapAndLiquify(
                amountToSwapForETH,
                ethForLiquidity,
                tokensForLiquidity
            );
        }

        (success, ) = address(marketingWallet).call{
            value: address(this).balance
        }("");
    }