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

// interfaces
import {IIntrospectionBase} from "./IIntrospectionBase.sol";
import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol";

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

abstract contract IntrospectionBase is IIntrospectionBase {
    function __IntrospectionBase_init() internal {
        _addInterface(type(IERC165).interfaceId);
    }

    function _addInterface(bytes4 interfaceId) internal {
        if (!_supportsInterface(interfaceId)) {
            IntrospectionStorage.layout().supportedInterfaces[interfaceId] = true;
        } else {
            revert Introspection_AlreadySupported();
        }
        emit InterfaceAdded(interfaceId);
    }

    function _removeInterface(bytes4 interfaceId) internal {
        if (_supportsInterface(interfaceId)) {
            IntrospectionStorage.layout().supportedInterfaces[interfaceId] = false;
        } else {
            revert Introspection_NotSupported();
        }
        emit InterfaceRemoved(interfaceId);
    }

    function _supportsInterface(bytes4 interfaceId) internal view returns (bool) {
        return IntrospectionStorage.layout().supportedInterfaces[interfaceId];
    }
}