// File: contracts/PreSale.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {IAnftifyNFT} from "./interfaces/IAnftifyNFT.sol";

contract PreSale is Ownable {
    struct Voucher {
		bytes32 r;
		bytes32 s;
		uint8 v;
	}

	mapping(address => bool) public addressMinted;
	uint256 public maxMintsPerAddress;
	uint256 public maxMintsForSaleType;
	uint256 public totalMinted;
	uint256 public mintPrice;
	string public saleType;
	address public nft;
	address public treasury;
	bool public pause = true;

 	event MaxMintsForSaleTypeSet(uint256 maxMintsForSaleType);
	event MaxMintPerAddressSet(uint256 maxMintsPerAddress);
	event MintPriceSet(uint256 mintPrice);
	event SaleTypeSet(string saleType);
	event NFTAddressSet(address nft);
	event TreasuryAddressUpdated(address treasury);
	event PauseUpdated(bool pause);

	constructor(uint256 _maxMintsForSaleType, uint256 _maxMintsPerAddress, uint256 _mintPrice, string memory _saleType, address _nft, address _treasury) {
		require(_maxMintsForSaleType > 0, "PreSale: maxMintsForSaleType should be greater than zero");
		require(_maxMintsPerAddress > 0, "PreSale: maxMintsPerAddress should be greater than zero");
		require(bytes(_saleType).length > 0, "PreSale: Cannot set empty saleType");
		require(_nft != address(0), "PreSale: NFT address cannot be zero address");
		require(_treasury != address(0), "PreSale: treasury address cannot be zero address");

		maxMintsForSaleType = _maxMintsForSaleType;
		maxMintsPerAddress = _maxMintsPerAddress;
		mintPrice = _mintPrice;
		saleType = _saleType;
		nft = _nft;
		treasury = _treasury;

		emit MaxMintsForSaleTypeSet(maxMintsForSaleType);
		emit MaxMintPerAddressSet(maxMintsPerAddress);
		emit MintPriceSet(mintPrice);
		emit SaleTypeSet(saleType);
		emit NFTAddressSet(nft);
		emit TreasuryAddressUpdated(treasury);
	}

    /// Mint function for presale
	/// @dev mints by addresses validated using verified vouchers signed by an admin signer
	/// @notice mints token to addresses eligible for presale
	/// @param amount number of tokens to mint in transaction
	/// @param voucher voucher signed by an admin signer
	function mint(uint256 amount, Voucher memory voucher) 
		external 
		payable 
		validateEthPayment(amount)
		saleIsOpen(amount)
	{
		require(
			amount > 0,
			"PreSale: 0 number of presale mints"
		);

		require(
			amount <= maxMintsPerAddress,
			"PreSale: Exceeds number of presale mints allowed per address"
		);

		require(
			!addressMinted[msg.sender],
			"PreSale: Already minted"
		);
		bytes32 digest = keccak256(abi.encode(saleType, msg.sender));
		require(_isVerifiedVoucher(digest, voucher), "PreSale: Invalid voucher");

		addressMinted[msg.sender] = true;
		totalMinted = totalMinted + amount;
		IAnftifyNFT(nft).mint(amount, msg.sender);

		(bool success, ) = treasury.call{value: address(this).balance}("");
		require(success, "Transfer failed.");
	}

	/// @dev check that the voucher sent was signed by the admin signer
	function _isVerifiedVoucher(bytes32 digest, Voucher memory voucher)
		internal
		view
		returns (bool)
	{
		address signer = ecrecover(digest, voucher.v, voucher.r, voucher.s);
		require(signer != address(0), "ECDSA: invalid signature"); // Added check for zero address
		return signer == owner();
	}

	function setTreasury(address _treasury) public onlyOwner {
		require(_treasury != address(0), "PreSale: treasury address cannot be zero address");
		treasury = _treasury;
		emit TreasuryAddressUpdated(treasury);
    }
	
	function setPause(bool _pause) public onlyOwner {
		pause = _pause;
		emit PauseUpdated(pause);
    }

    /// Modifier to validate eth value on payable functions
	/// @param amount number of tokens to mint in transaction
	modifier validateEthPayment(uint256 amount) {
		require(
			mintPrice * amount <= msg.value,
			"PreSale: Ether value sent is not correct"
		);
		_;
	}

	modifier saleIsOpen(uint256 amount) {
		require(
			totalMinted + amount <= maxMintsForSaleType,
			"PreSale: Exceeds number of total presale mints allowed"
		);
		require(
			!pause, 
			"PreSale: Paused"
		);
        _;
    }
}
// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// File: contracts/interfaces/IAnftifyNFT.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;

import {IERC721Enumerable} from "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";

interface IAnftifyNFT is IERC721Enumerable {
    function mint(uint256 amount, address account) external;
    function setContractURI(string memory _contractURI) external;
    function setBaseURI(string memory _baseTokenURI) external;
    function setPause(bool _pause) external;
}
// File: @openzeppelin/contracts/utils/Context.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {
    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.
     * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);

    /**
     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
     * Use along with {totalSupply} to enumerate all tokens.
     */
    function tokenByIndex(uint256 index) external view returns (uint256);
}

// File: @openzeppelin/contracts/token/ERC721/IERC721.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;
}

// File: @openzeppelin/contracts/utils/introspection/IERC165.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}