// File: lib/openzeppelin-contracts/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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 Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        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: lib/openzeppelin-contracts/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: src/WordPuzzle.sol



// SPDX-License-Identifier: MIT
/**
 * Creator: Virtue Labs
 * Authors:
 *** Code: 0xYeety, CTO - Virtue labs
 *** Concept: Church, CEO - Virtue Labs
**/

pragma solidity ^0.8.17;

import "lib/openzeppelin-contracts/contracts/access/Ownable.sol";

contract WordPuzzle is Ownable {
    bytes32 private _solutionHash;
    uint256 private _numWords;

    constructor() {}

    function setSolutionHash(bytes32 _newSolutionHash, uint256 _newNumWords) public onlyOwner {
        _solutionHash = _newSolutionHash;
        _numWords = _newNumWords;
    }

    function checkSolution(string[] calldata solution) public view returns (bool) {
        uint256 solLen = solution.length;

        require(solLen > 0, "l0");

        if (solLen != _numWords) {
            return false;
        }

        bytes32 providedSolution = keccak256(abi.encodePacked(solution[0]));
        for (uint256 i = 1; i < solLen; i++) {
            providedSolution = keccak256(abi.encodePacked(providedSolution, solution[i]));
        }

        return (providedSolution == _solutionHash);
    }

    function getSolution(string[] calldata solution) public pure returns (bytes32) {
        uint256 solLen = solution.length;

        require(solLen > 0, "l0");

        bytes32 providedSolution = keccak256(abi.encodePacked(solution[0]));
        for (uint256 i = 1; i < solLen; i++) {
            providedSolution = keccak256(abi.encodePacked(providedSolution, solution[i]));
        }

        return providedSolution;
    }

    receive() external payable {
        require(false, "This address should not be receiving funds by fallback!");
    }
}

////////////////////////////////////////