// File: src/referrals/ReferralStorage.sol



// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.21;

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

contract ReferralStorage is Ownable, IReferralStorage {
    mapping(address => bool) public isHandler;
    mapping(bytes32 => address) public override codeOwner;
    mapping(address => bytes32) public override accountCodeOwned;
    mapping(address => bytes32) public override accountReferralCode;

    event RegisterCode(address account, bytes32 code);
    event SetAccountReferralCode(address account, bytes32 code);
    event SetCodeOwner(bytes32 code, address newAccount);
    event AdminSetCodeOwner(bytes32 code, address newAccount);

    // solhint-disable-next-line no-empty-blocks
    constructor() Ownable(msg.sender) { }

    /// @dev Registers an handler.
    /// @param _account The account.
    /// @param _isActive Flag to activate/deactivate the handler.
    function registerHandler(address _account, bool _isActive) external onlyOwner {
        isHandler[_account] = _isActive;
    }

    /// @dev Registers a referral code.
    /// @param _code The referral code.
    function registerCode(bytes32 _code) external {
        require(_code != bytes32(0), "ReferralStorage: invalid code");
        require(codeOwner[_code] == address(0), "ReferralStorage: code already exists");
        require(accountCodeOwned[msg.sender] == bytes32(0), "ReferralStorage: account already has a code");

        codeOwner[_code] = msg.sender;
        accountCodeOwned[msg.sender] = _code;

        emit RegisterCode(msg.sender, _code);
    }

    /// @dev Sets a referral code for the given account.
    /// @param _account The account to set the referral code for.
    /// @param _code The referral code.
    function setAccountReferralCode(address _account, bytes32 _code) external override {
        require(isHandler[msg.sender], "ReferralStorage: forbidden");
        require(codeOwner[_code] != address(0), "ReferralStorage: code doesn't exist");
        require(codeOwner[_code] != _account, "ReferralStorage: can't set own code");
        _setAccountReferralCode(_account, _code);
    }

    /// @dev Sets a referral code for the caller.
    /// @param _code The referral code.
    function adminSetCodeOwner(bytes32 _code, address _newAccount) external override onlyOwner {
        require(_code != bytes32(0), "ReferralStorage: invalid _code");

        address oldOwner = codeOwner[_code];

        codeOwner[_code] = _newAccount;
        accountCodeOwned[_newAccount] = _code;
        accountCodeOwned[oldOwner] = bytes32(0);

        emit AdminSetCodeOwner(_code, _newAccount);
    }

    /// @dev Returns referral info for the account.
    /// @param _account The account.
    function getAccountReferralInfo(address _account) external view override returns (bytes32, address) {
        bytes32 code = accountReferralCode[_account];
        address referrer;
        if (code != bytes32(0)) {
            referrer = codeOwner[code];
        }
        return (code, referrer);
    }

    /// @dev Sets a referral code for the account.
    /// @param _account The account.
    /// @param _code The referral code.
    function _setAccountReferralCode(address _account, bytes32 _code) private {
        accountReferralCode[_account] = _code;
        emit SetAccountReferralCode(_account, _code);
    }
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../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.
 *
 * The initial owner is set to the address provided by the deployer. 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;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @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 {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling 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 {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _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: src/referrals/interfaces/IReferralStorage.sol



// SPDX-License-Identifier: UNLICENSED
pragma solidity >=0.8.21;

interface IReferralStorage {
    function codeOwner(bytes32 _code) external view returns (address);
    function accountCodeOwned(address _account) external view returns (bytes32);
    function accountReferralCode(address _account) external view returns (bytes32);
    function setAccountReferralCode(address _account, bytes32 _code) external;
    function getAccountReferralInfo(address _account) external view returns (bytes32, address);
    function adminSetCodeOwner(bytes32 _code, address _newAccount) external;
}

// File: lib/openzeppelin-contracts/contracts/utils/Context.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @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;
    }
}