// SPDX-License-Identifier: MIT
pragma solidity ^0.8.23;

// interfaces
import {IOwnablePendingBase} from "./IOwnablePending.sol";

// libraries
import {OwnablePendingStorage} from "./OwnablePendingStorage.sol";

// contracts
import {OwnableBase} from "../OwnableBase.sol";

abstract contract OwnablePendingBase is IOwnablePendingBase, OwnableBase {
    modifier onlyPendingOwner() {
        if (msg.sender != _pendingOwner()) {
            revert OwnablePending_NotPendingOwner(msg.sender);
        }
        _;
    }

    function _startTransferOwnership(address owner, address pendingOwner) internal {
        OwnablePendingStorage.layout().pendingOwner = pendingOwner;
        emit OwnershipTransferStarted(owner, pendingOwner);
    }

    function _acceptOwnership() internal {
        address newOwner = _pendingOwner();
        _transferOwnership(newOwner);

        delete OwnablePendingStorage.layout().pendingOwner;
    }

    function _renounceOwnership() internal override {
        OwnablePendingStorage.layout().pendingOwner = address(0);
        super._renounceOwnership();
    }

    function _pendingOwner() internal view returns (address) {
        return OwnablePendingStorage.layout().pendingOwner;
    }
}