// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;

/**
 * @title Authority.
 * @dev Manage Authorities to DSA.
 */

import { AccountInterface } from "../../common/interfaces.sol";
import { Helpers } from "./helpers.sol";
import { Events } from "./events.sol";

abstract contract AuthorityResolver is Events, Helpers {
    /**
     * @dev Add New authority
     * @notice Add an address as account authority
     * @param authority The authority Address.
     */
    function add(
        address authority
    ) external payable returns (string memory _eventName, bytes memory _eventParam) {
        require(authority != address(0), "Not-valid-authority");
        AccountInterface _dsa = AccountInterface(address(this));
        if (_dsa.isAuth(authority)) {
            authority = address(0);
        } else {
            _dsa.enable(authority);
        }

        _eventName = "LogAddAuth(address,address)";
        _eventParam = abi.encode(msg.sender, authority);
    }

    /**
     * @dev Remove authority
     * @notice Remove an address as account authority
     * @param authority The authority Address.
     */
    function remove(
        address authority
    ) external payable returns (string memory _eventName, bytes memory _eventParam) {
        require(checkAuthCount() > 1, "Removing-all-authorities");
        require(authority != address(0), "Not-valid-authority");
        AccountInterface _dsa = AccountInterface(address(this));
        if (_dsa.isAuth(authority)) {
            _dsa.disable(authority);
        } else {
            authority = address(0);
        }

        _eventName = "LogRemoveAuth(address,address)";
        _eventParam = abi.encode(msg.sender, authority);
    }
}

contract ConnectV2AuthOptimism is AuthorityResolver {
    string public constant name = "Auth-v1.1";
}